CN106026124A - Reactive compensation device - Google Patents
Reactive compensation device Download PDFInfo
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- CN106026124A CN106026124A CN201610508799.4A CN201610508799A CN106026124A CN 106026124 A CN106026124 A CN 106026124A CN 201610508799 A CN201610508799 A CN 201610508799A CN 106026124 A CN106026124 A CN 106026124A
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- 239000003990 capacitor Substances 0.000 claims abstract description 40
- 238000000034 method Methods 0.000 claims description 43
- 239000000203 mixture Substances 0.000 claims description 18
- 239000004065 semiconductor Substances 0.000 abstract description 3
- 230000016507 interphase Effects 0.000 abstract 2
- 230000008878 coupling Effects 0.000 description 14
- 238000010168 coupling process Methods 0.000 description 14
- 238000005859 coupling reaction Methods 0.000 description 14
- 238000010891 electric arc Methods 0.000 description 3
- 238000003801 milling Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for AC mains or AC distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1807—Arrangements for adjusting, eliminating or compensating reactive power in networks using series compensators
- H02J3/1814—Arrangements for adjusting, eliminating or compensating reactive power in networks using series compensators wherein al least one reactive element is actively controlled by a bridge converter, e.g. unified power flow controllers [UPFC]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for AC mains or AC distribution networks
- H02J3/26—Arrangements for eliminating or reducing asymmetry in polyphase networks
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
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Abstract
The invention discloses a reactive compensation device. On the basis of a load characteristic of a distribution system, an inter-phase reactive compensation capacitance value is designed, so that the number of compensation capacitors needing frequent switching is reduced, the service life and security of most of compensation capacitors are improved substantially. A controllable semiconductor switch is used for carrying out commutation to improve the commutation efficiency, so that the rapid dynamic reactive compensation can be realized conveniently. Valve sets of an upper bridge arm and a lower bridge arm are for mutual standby application; when a fault occurs at one valve group, the standby valve group is started to form different conduction loops, so that the same inter-phase compensation cavity is compensated by using the same control way. Therefore, the fault can be eliminated rapidly and the system reliability is improved.
Description
Technical field
The present invention relates to a kind of reactive power compensator, be specifically related to a kind of reactive power compensator in the case of electrical system bus three-phase imbalance.
Background technology
Existing reactive power compensator is all only to consider to design under distribution system three-phrase burden balance state, but steel industry or railway distribution system generally include multiple three-phase imbalance load, such as electric arc furnace, milling train or traction electric machine etc., steel industry or the distribution system for railway transportation is caused to be typically three-phase unbalance system, reactive compensation power required for three-phase unbalance system is also unbalanced, therefore, when using existing reactive power compensator that it is carried out reactive-load compensation, alternate serious mistake of part bus certainly will be caused to mend and remain the alternate serious problem owing to mend of bus.nullSuch as: the alternate required dynamic passive compensation capacity of AB is 0.8Q，The alternate required dynamic passive compensation capacity of BC is 0.8Q，And the alternate required dynamic passive compensation capacity of CA is 0.5C，Now，If use existing reactive power compensator that it is compensated，Alternate for AB dynamic passive compensation capacity is adjusted to 0.8Q，BC alternate dynamic passive compensation capacity is adjusted to 0.8C，CA alternate dynamic passive compensation capacity is adjusted to 0.8C，Necessarily result in the generation of the alternate serious idle overcompensation of CA，And alternate for AB dynamic passive compensation capacity is adjusted to 0.5Q，BC alternate dynamic passive compensation capacity is adjusted to 0.5C，CA alternate dynamic passive compensation capacity is adjusted to 0.5C，Necessarily result in AB、The generation of the alternate serious undercompensation problem of BC，And during additional reactive compensation capacity alternate to some undercompensation，Alternately fluctuation due to alternate reactive-load compensation demand，Multiple compensation electric capacity is caused frequently to put into and excise，The service life of electric capacity certainly will be affected.nullThe distribution system reactive power fluctuation of part iron industry and Railway Transport Industry is generally of alternate alternately undulatory property，Such as: the t0-t1 time period，AB alternate dynamic passive compensation capacity requirement is 0.8Q，BC alternate dynamic passive compensation capacity requirement is 0.8C，CA alternate dynamic passive compensation capacity requirement is 0.5C，The t1-t2 time period，AB alternate dynamic passive compensation capacity requirement is 0.5Q，BC alternate dynamic passive compensation capacity requirement is 0.9Q，CA alternate dynamic passive compensation capacity requirement is 0.9C，The t1-t3 time period，AB alternate dynamic passive compensation capacity requirement is 0.7Q，BC alternate dynamic passive compensation capacity requirement is 0.5Q，CA alternate dynamic passive compensation capacity requirement is 0.7Q，As can be seen here，Its alternate reactive requirement possesses certain regularity，Certain two alternate reactive-load compensation demand i.e. are bigger，And an other alternate reactive compensation capacity demand is less，Less alternate of alternate reactive compensation capacity demand has commutation and its reactive-load compensation demand keeps constant.For this, the present invention devises a kind of reactive power compensator for above-mentioned power distribution system load characteristic, it is Tong Bu that the minimum alternate reactive-load compensation of this device has the alternate commutation less with Reactive Power Compensation of Power Distribution System capacity requirement, and the offset of the minimum alternate reactive compensation capacity alternate compensation capacity less with Reactive Power Compensation of Power Distribution System capacity requirement is equal and be constant, the most alternate for reactive-load compensation demand, realize compensation capacity by tunable capacitor and adjust the dynamic need with the alternate reactive compensation capacity of satisfied correspondence, and bigger alternate reactive-load compensation to have the alternate commutation bigger with Reactive Power Compensation of Power Distribution System capacity requirement Tong Bu, realize alternate commutation by controllable semiconductor switch to synchronize.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art, it is provided that a kind of distribution system to comprising three-phase imbalance load carries out the device of reactive-load compensation.
The technical scheme that the present invention provides is: a kind of reactive power compensator, it includes multiple two-way controllable valve group, multiple definite value electric capacity, tunable capacitor, sensor, controller and valve group drive dynamic control device, it is characterized in that: sensor acquisition electrical network AB, the alternate electrical quantity of BC and CA, and described electrical quantity is transmitted to controller, controller calculates each alternate reactive-load compensation requirements according to described electrical quantity, controller calculates each alternate capacitance needing switching according to described reactive-load compensation requirements, and the two-way controllable valve group obtaining the two-way controllable valve group in requisition for conducting with needs shutoff of tabling look-up according to the described capacitance needing switching, valve group drives dynamic control device to be needed the conducting of the two-way controllable valve group turned on according to controller order-driven and drives the shutoff of the described two-way controllable valve group needing and turning off.
Tunable capacitor is composed in parallel by the electric capacity of multiple series connection fling-cut switches, and wherein, described fling-cut switch is two-way controllable valve group, and described controller realizes the selection of shunt capacitance number by the break-make controlling fling-cut switch, thus changes the capacitance of tunable capacitor.
Tunable capacitor only includes the two-way controllable valve group that an electric capacity and series connection with it connect, and changes the capacitance of described tunable capacitor by controlling the two-way controllable valve group angle of flow.
Tunable capacitor includes the electric capacity by controlling two-way controllable valve group angle of flow change capacitance and multiple electric capacity being controlled electric capacity break-make by fling-cut switch, the described electric capacity by control two-way controllable valve group angle of flow change capacitance and the described electric capacity parallel connection being controlled electric capacity break-make by fling-cut switch.
nullElectric capacity in reactive power compensator has three and is respectively the first electric capacity、Second electric capacity and the 3rd electric capacity，Two-way controllable valve group has 22，First valve group and the 6th valve group are connected in series composition the first brachium pontis at node j，3rd valve group and the second valve group are connected in series composition the second brachium pontis at node k，5th valve group and the 4th valve group are connected in series composition the 3rd brachium pontis at node l，First brachium pontis、Second brachium pontis and the 3rd brachium pontis are connected in parallel in node d and node e，7th valve group and the 12nd valve group are connected in series composition four bridge legs at node m，9th valve group and the 8th valve group are connected in series composition the 5th brachium pontis at node n，11st valve group and the tenth valve group are connected in series composition the 6th brachium pontis at node o，Four bridge legs、5th brachium pontis and the 6th brachium pontis are connected in parallel in node f and node g，13rd valve group and the 18th valve group are connected in series composition the 7th brachium pontis at node p，15th valve group and the 14th valve group are connected in series composition the 8th brachium pontis at node q，17th valve group and the 16th valve group are connected in series composition the 9th brachium pontis at node r，7th brachium pontis、8th brachium pontis and the 9th brachium pontis are connected in parallel in node h and node i，19th valve group two ends are connected to node d and node f，20th valve group two ends are connected to node f and node h，21st valve group two ends are connected to node e and node g，22nd valve group two ends are connected to node g and node i，The distribution system bus A phase carrying out reactive-load compensation is needed to connect node j respectively、Node m and node p，B phase connects node k respectively、Node n and node q，C phase connects node l respectively、Node o and node r，First electric capacity two ends are connected to node d and node e，Second electric capacity two ends are connected to node f and node g，3rd electric capacity two ends are connected to node h and node i.First electric capacity and the 3rd electric capacity are definite value electric capacity, and the second electric capacity is tunable capacitor.First electric capacity and the second electric capacity are definite value electric capacity, and the 3rd electric capacity is tunable capacitor.Second electric capacity and the 3rd electric capacity are definite value electric capacity, and the first electric capacity is tunable capacitor.nullReactive power compensator has six kinds of methods of operation，The first method of operation is the only first valve group、11st valve group、15th valve group、24th valve group and the 25th valve group two-way admittance，The second method of operation is the only the 6th valve group、Tenth valve group、14th valve group、22nd valve group、23rd valve group two-way admittance，The third method of operation is the only the 5th valve group、9th valve group、13rd valve group、24th valve group、25th valve group two-way admittance，The 4th kind of method of operation is the only the 4th valve group、8th valve group、18th valve group、22nd valve group、23rd valve group two-way admittance，The 5th kind of method of operation is the only the 3rd valve group、7th valve group、17th valve group、24th valve group、25th valve group two-way admittance，The 6th kind of method of operation is the only second valve group、12nd valve group、16th valve group、22nd valve group、23rd valve group two-way admittance.
When the first valve group under the first method of operation, 11st valve group, 15th valve group, when one of 24th valve group or the 25th valve group break down, control this reactive power compensator and enter second method of operation, 6th valve group, tenth valve group, 14th valve group, when one of 22nd valve group or the 23rd valve group break down, control this reactive power compensator and enter first method of operation, first method of operation and second method of operation standby operation mode each other, first method of operation makes with the switching of second method of operation in the case of tunable capacitor capacity is constant only by controlling the switching realization input alternate identical compensation capacitance of distribution system of different valve group.
When the 5th valve group under the third method of operation, 9th valve group, 13rd valve group, when one of 24th valve group or the 25th valve group break down, control this reactive power compensator and enter the 4th method of operation, 4th valve group, 8th valve group, 18th valve group, 22nd valve group, when one of 23rd valve group breaks down, control this reactive power compensator and enter the 3rd method of operation, 3rd method of operation and the 4th method of operation standby operation mode each other, 3rd method of operation makes with the switching of the 4th method of operation in the case of tunable capacitor capacity is constant only by controlling the switching realization input alternate identical compensation capacitance of distribution system of different valve group.
When the 3rd valve group under the 5th kind of method of operation, 7th valve group, 17th valve group, when one of 24th valve group or the 25th valve group break down, control this reactive power compensator and enter the 6th method of operation, second valve group, 12nd valve group, 16th valve group, when one of 22nd valve group or the 23rd valve group break down, control this reactive power compensator and enter the 5th method of operation, 5th method of operation and the 6th method of operation standby operation mode each other, 5th method of operation makes with the switching of the 6th method of operation in the case of tunable capacitor capacity is constant only by controlling the switching realization input alternate identical compensation capacitance of distribution system of different valve group.
When the alternate compensation capacity that reactive compensation capacity demand is less equal for constant Q1 time, specified for Q1 coupling system voltage between phases U is calculated this alternate to the capacitance C0 in requisition for compensation, the capacitance C3 of the first capacitance C1 and the 3rd electric capacity is designed as C1=C3=2C0, now, corresponding minimum alternate compensation capacitance is (1/2) * 2C0=C0, just it is used for compensating minimum alternate reactive-load compensation demand, and commutation tracking and the commutation synchronization of minimum alternate reactive requirement can be completed by the break-make controlling the first valve group to the 25th valve group.
Implement the reactive power compensator of the present invention, have the advantages that, reduce the compensation electric capacity number needing frequently to carry out switching, thus improve major part and compensate service life and the safety of electric capacity, use controllable semiconductor switch to carry out commutation and improve commutation speed, facilitate implementation quick dynamic passive compensation, the valve group of upper and lower bridge arm is the most standby, make when certain valve group breaks down, different conducting loop is formed by enabling service valve group, carry out identical control mode and compensate identical alternate compensation capacity, achieve the reliability that fault is quickly excised and improve system.
Accompanying drawing explanation
Fig. 1 is the reactive power compensator overall system configuration figure of the present invention.
Fig. 2 is the configuration schematic diagram of tunable capacitor.
Detailed description of the invention
Fig. 1 is the first embodiment of the present invention: a kind of reactive power compensator in Fig. 1, by two-way controllable valve group 1,
Two-way controllable valve group 2, two-way controllable valve group 3, two-way controllable valve group 4, two-way controllable valve group 5, two-way controllable valve group 6, two-way controllable valve group 7, two-way controllable valve group 8, two-way controllable valve group 9, two-way controllable valve group 10, two-way controllable valve group 11, two-way controllable valve group 12, two-way controllable valve group 13, two-way controllable valve group 14, two-way controllable valve group 15, two-way controllable valve group 16, two-way controllable valve group 17, two-way controllable valve group 18, two-way controllable valve group 22, two-way controllable valve group 23, two-way controllable valve group 24, two-way controllable valve group 25, C1 electric capacity 19, C2 tunable capacitor 20, C3 electric capacity 21, sensor 26, controller 27, valve group is driven dynamic control device 28 and is formed.Two-way controllable valve group 1 and two-way controllable valve group 6 are connected, two-way controllable valve group 3 and two-way controllable valve group 2 are connected, two-way controllable valve group 5 and two-way controllable valve group 4 are connected, two-way controllable valve group 1 ~ two-way controllable valve group 6 uses three phase full bridge to connect in 3, and two-way controllable valve group 1, two-way controllable valve group 3 and two-way controllable valve group 5 are positioned at the upper brachium pontis of full bridge structure；Two-way controllable valve group 6, two-way controllable valve group 2 and two-way controllable valve group 4 are positioned at the lower brachium pontis of full bridge structure；Two-way controllable valve group 7 and two-way controllable valve group 12 are connected, two-way controllable valve group 9 and two-way controllable valve group 8 are connected, two-way controllable valve group 11 and two-way controllable valve group 10 are connected, two-way controllable valve group 7 ~ two-way controllable valve group 12 uses three phase full bridge to connect in 3, and two-way controllable valve group 7, two-way controllable valve group 9 and two-way controllable valve group 11 are positioned at the upper brachium pontis of full bridge structure；Two-way controllable valve group 12, two-way controllable valve group 8 and two-way controllable valve group 10 are positioned at the lower brachium pontis of full bridge structure；Two-way controllable valve group 13 and two-way controllable valve group 18 are connected, two-way controllable valve group 15 and two-way controllable valve group 14 are connected, two-way controllable valve group 17 and two-way controllable valve group 16 are connected, two-way controllable valve group 13 ~ two-way controllable valve group 18 uses three phase full bridge to connect in 3, and two-way controllable valve group 13, two-way controllable valve group 15 and two-way controllable valve group 17 are positioned at the upper brachium pontis of full bridge structure；Two-way controllable valve group 18, two-way controllable valve group 14 and two-way controllable valve group 16 are connected to the lower brachium pontis of full bridge structure；Tunable capacitor 19 is connected between node d, e, tunable capacitor 20 is connected between node f, g, tunable capacitor 21 is connected between node h, i, two-way controllable valve group 22 is connected between node d, f, two-way controllable valve group 23 is connected between node f, h, two-way controllable valve group 24 is connected between node e, g, two-way controllable valve group 25 is connected between node g, i, three-phase bus power supply A phase is connected to node j, m, p, three-phase bus power supply B phase is connected to node k, n, q, and three-phase bus power supply C phase is connected to node l, o, r.nullUtilize sensor acquisition electrical network AB、BC and CA voltage between phases、The electrical quantity such as electric current and phase angle，Above-mentioned electrical quantity is transmitted to controller，Controller calculates each alternate reactive-load compensation requirements according to above-mentioned electrical quantity，Above-mentioned reactive-load compensation requirements is calculated as the corresponding each alternate capacitance needing switching by controller，In definition power system, the alternate required reactive-load compensation of three-phase bus AB is Qab，The alternate required reactive-load compensation of BC is Qbc，The alternate required reactive-load compensation of CA is Qca，When power system is in three-phase equilibrium，Each alternate required reactive-load compensation is also at poised state Qab=Qbc=Qca，But in most cases，Power system is in three-phase imbalance state，Required each alternate required reactive-load compensation is also at unbalanced state Qab ≠ Qbc ≠ Qca，The particularly load such as electric arc furnace or milling train belongs to serious three-phase imbalance load，It is carried out reactive-load compensation and generally to carry out special compensation according to part throttle characteristics，The each alternate required reactive-load compensation of the load such as electric arc furnace or milling train is generally in following several situation: (1) Qbc=Qca ＞ Qab，(2) Qab=Qbc ＞ Qca，(3) Qab=Qca ＞ Qbc，And above-mentioned 3 kinds of reactive requirement situations are alternately present，For this，Can utilize controller that each controlled valve group is led and carry out on or off control，So that carrying out centralized compensation for bigger alternate of alternate reactive requirement，Less alternate of alternate reactive requirement is carried out weak compensation.
When situation (1) Qbc=Qca ＞ Qab occurs, controller can be made to control only to make valve group 1,11,15,24,25 two-way admittance or only valve group 6,10,14,22,23 conducting, changed by the constantly electric capacity input of regulation tunable capacitor C2 and need the BC capacitive coupling of centralized compensation, CA capacitive coupling, alternate to BC and CA is alternate carries out centralized compensation, carrying out weak compensation to AB is alternate, concrete regulation situation can be found in table 1:
Only valve group 1,11,15,24,25 conducting or only valve group 6,10,14,22,23 conducting,
When Qbc, Qca reactive requirement increases, BC is alternate and CA is alternate reactive compensation capacity is increased till meeting its reactive requirement by increasing the electric capacity that BC is alternate and CA is alternate, when one of valve group 1,11,15,24 or 25 breaks down, identical capacitive coupling switching can be completed control by only conducting valve group 6,10,14,22 and 23.
When situation (2) Qab=Qbc ＞ Qca occurs, controller can be made to control only to make valve group 1,11,15,24,25 two-way admittance or only valve group 4,8,18,22,23 conducting, changed by the constantly electric capacity input of regulation tunable capacitor C2 and need the AB capacitive coupling of centralized compensation, BC capacitive coupling, alternate to AB and BC is alternate carries out centralized compensation, carrying out weak compensation to CA is alternate, concrete regulation situation can be found in table 2:
Only valve group 5,9,13,24,25 conducting or only valve group 4,8,18,22,23 conducting,
When Qab, Qbc reactive requirement increases, increase AB is alternate and BC is alternate reactive compensation capacity till meeting its reactive requirement by increasing the electric capacity that AB is alternate and BC is alternate.When one of valve group 5,9,13,24 or 25 breaks down, identical capacitive coupling switching can be completed control by only conducting valve group 4,8,18,22 and 23.
When situation (3) Qab=Qca ＞ Qbc occurs, controller can be made to control only to make valve group 3,7,17,24,25 two-way admittance or only valve group 2,12,16,22,23 conducting, changed by the constantly electric capacity input of regulation tunable capacitor C2 and need the AB capacitive coupling of centralized compensation, AC capacitive coupling, alternate to AB and AC is alternate carries out centralized compensation, carrying out weak compensation to BC is alternate, concrete regulation situation can be found in table 3:
Make valve group 3,7,17,24,25 two-way admittance or only valve group 2,12,16,22,23 conducting,
| C1=C3=C, C2=C | C1=C3=C, C2=2C | C1=C3=C, C2=3C | C1=C3=C, C2=4C | ||
| C1//C2 | AB capacitive coupling Qab | (1/2)C | (2/3)C | (3/4)C | (4/5)C |
| C1//C3 | BC capacitive coupling Qbc | (1/2)C | (1/2)C | (1/2)C | (1/2)C |
| C2//C3 | CA capacitive coupling Qca | (1/2)C | (2/3)C | (3/4)C | (4/5)C |
When Qab, Qca reactive requirement increases, AB is alternate and CA is alternate reactive compensation capacity is increased till meeting its reactive requirement by increasing the electric capacity that AB is alternate and CA is alternate, when one of valve group 3,7,17,24 or 25 breaks down, identical capacitive coupling switching can be completed control by only conducting valve group 2,12,16,22 and 23.
Above table only summarises the strategy of partial adjustment electric capacity C2, can be by increasing the group number of shunt capacitance, constantly adjust the value of C2, such as: as C2=kC, maximum alternate compensation capacitance corresponds to (k/k+1) C, when k levels off to infinity, maximum alternate compensation capacitance is close to C, therefore, when C2 is used for adjusting centralized compensation capacity, its adjustable extent is (1/2) C ~ C.
C1 can also be designed as tunable capacitor according to the method described above, C2 and C3 is non-adjustable electric capacity or C3 is designed as tunable capacitor, C1 and C2 is non-adjustable electric capacity.
Additionally the electric capacity of tunable capacitor C2 is adjustable, can be that GTO or the IGBT break-make controlled by controller realizes electric capacity continuously adjustabe, it is also possible to be that fling-cut switch controls the group number of shnt capacitor to realize electric capacity tunable capacitor parallel connection that is adjustable or that above two mode realized adjustable to realize electric capacity.
When the alternate compensation capacity that reactive compensation capacity demand is less equal for constant Q1 time, specified for Q1 coupling system voltage between phases U is calculated this alternate to the capacitance C0 in requisition for compensation, the capacitance of C1 and C3 can be designed as C1=C3=2C0, now, be can be seen that minimum alternate compensation capacitance is (1/2) * 2C0=C0 by table 1 ~ table 3 data, just it is used for compensating minimum alternate reactive-load compensation demand, and commutation tracking and the commutation synchronization of minimum alternate reactive requirement can be completed by the break-make of control valve group 1 ~ 25.
Fig. 2 is that tunable capacitor can be with the two kinds of forms being designed to, Fig. 2 a only lists the situation parallel connection switching of four groups of electric capacity to change the situation of tunable capacitor C2 capacitance, it can be designed as the switching situation of k group electric capacity, k is the natural number between 1 ~ 200, capacitance between each group electric capacity can be the same or different, the situation that a few groups of capacitances are identical and other group capacitances are different can also be designed to, according to treating the part throttle characteristics of reactive-load compensation bus, tri-phase unbalance factor or compensation precision demand designed, designed and capacitance can be selected.
Fig. 2 b only lists the situation of four groups of electric capacity parallel connection switchings, one of which electric capacity can be by the control break capacitance of the valve group angle of flow, it can be designed as the switching situation of k group electric capacity, k is the natural number between 1 ~ 200, capacitance between each group electric capacity can be the same or different, the situation that a few groups of capacitances are identical and other group capacitances are different can also be designed to, according to treating the part throttle characteristics of reactive-load compensation bus, tri-phase unbalance factor or compensation precision demand designed, designed and capacitance can be selected.
The invention is not restricted to the disclosed embodiments and accompanying drawing, it is intended to cover various changes and the deformation falling into spirit and scope of the present invention.
Claims (10)
1. a reactive power compensator, it includes multiple two-way controllable valve group, multiple definite value electric capacity, tunable capacitor, sensor, controller and valve group drive dynamic control device, it is characterized in that: sensor acquisition electrical network AB, the alternate electrical quantity of BC and CA, and described electrical quantity is transmitted to controller, controller calculates each alternate reactive-load compensation requirements according to described electrical quantity, controller calculates each alternate capacitance needing switching according to described reactive-load compensation requirements, and the two-way controllable valve group obtaining the two-way controllable valve group in requisition for conducting with needs shutoff of tabling look-up according to the described capacitance needing switching, valve group drives dynamic control device to be needed the conducting of the two-way controllable valve group turned on according to controller order-driven and drives the shutoff of the described two-way controllable valve group needing and turning off.
Reactive power compensator the most according to claim 1, it is characterized in that: described tunable capacitor is composed in parallel by the electric capacity of multiple series connection fling-cut switches, wherein, described fling-cut switch is two-way controllable valve group, described controller realizes the selection of shunt capacitance number by the break-make controlling fling-cut switch, thus changes the capacitance of tunable capacitor.
Reactive power compensator the most according to claim 1, it is characterised in that: described tunable capacitor only includes the two-way controllable valve group that an electric capacity and series connection with it connect, and changes the capacitance of described tunable capacitor by controlling the two-way controllable valve group angle of flow.
Reactive power compensator the most according to claim 1, it is characterized in that: described tunable capacitor includes the electric capacity by controlling two-way controllable valve group angle of flow change capacitance and multiple electric capacity being controlled electric capacity break-make by fling-cut switch, the described electric capacity by control two-way controllable valve group angle of flow change capacitance and the described electric capacity parallel connection being controlled electric capacity break-make by fling-cut switch.
nullReactive power compensator the most according to claim 5，It is characterized in that: the electric capacity in reactive power compensator has three and is respectively the first electric capacity、Second electric capacity and the 3rd electric capacity，Two-way controllable valve group has 22，First valve group and the 6th valve group are connected in series composition the first brachium pontis at node j，3rd valve group and the second valve group are connected in series composition the second brachium pontis at node k，5th valve group and the 4th valve group are connected in series composition the 3rd brachium pontis at node l，First brachium pontis、Second brachium pontis and the 3rd brachium pontis are connected in parallel in node d and node e，7th valve group and the 12nd valve group are connected in series composition four bridge legs at node m，9th valve group and the 8th valve group are connected in series composition the 5th brachium pontis at node n，11st valve group and the tenth valve group are connected in series composition the 6th brachium pontis at node o，Four bridge legs、5th brachium pontis and the 6th brachium pontis are connected in parallel in node f and node g，13rd valve group and the 18th valve group are connected in series composition the 7th brachium pontis at node p，15th valve group and the 14th valve group are connected in series composition the 8th brachium pontis at node q，17th valve group and the 16th valve group are connected in series composition the 9th brachium pontis at node r，7th brachium pontis、8th brachium pontis and the 9th brachium pontis are connected in parallel in node h and node i，19th valve group two ends are connected to node d and node f，20th valve group two ends are connected to node f and node h，21st valve group two ends are connected to node e and node g，22nd valve group two ends are connected to node g and node i，The distribution system bus A phase carrying out reactive-load compensation is needed to connect node j respectively、Node m and node p，B phase connects node k respectively、Node n and node q，C phase connects node l respectively、Node o and node r，First electric capacity two ends are connected to node d and node e，Second electric capacity two ends are connected to node f and node g，3rd electric capacity two ends are connected to node h and node i.
Reactive power compensator the most according to claim 5, it is characterised in that: the first electric capacity and the 3rd electric capacity are definite value electric capacity, and the second electric capacity is tunable capacitor.
Reactive power compensator the most according to claim 5, it is characterised in that: the first electric capacity and the second electric capacity are definite value electric capacity, and the 3rd electric capacity is tunable capacitor.
Reactive power compensator the most according to claim 5, it is characterised in that: the second electric capacity and the 3rd electric capacity are definite value electric capacity, and the first electric capacity is tunable capacitor.
nullReactive power compensator the most according to claim 5，It is characterized in that: reactive power compensator has six kinds of methods of operation，The first method of operation is the only first valve group、11st valve group、15th valve group、24th valve group and the 25th valve group two-way admittance，The second method of operation is the only the 6th valve group、Tenth valve group、14th valve group、22nd valve group、23rd valve group two-way admittance，The third method of operation is the only the 5th valve group、9th valve group、13rd valve group、24th valve group、25th valve group two-way admittance，The 4th kind of method of operation is the only the 4th valve group、8th valve group、18th valve group、22nd valve group、23rd valve group two-way admittance，The 5th kind of method of operation is the only the 3rd valve group、7th valve group、17th valve group、24th valve group、25th valve group two-way admittance，The 6th kind of method of operation is the only second valve group、12nd valve group、16th valve group、22nd valve group、23rd valve group two-way admittance.
Reactive power compensator the most according to claim 9, it is characterized in that: when the first valve group under the first method of operation, 11st valve group, 15th valve group, when one of 24th valve group or the 25th valve group break down, control this reactive power compensator and enter second method of operation, 6th valve group, tenth valve group, 14th valve group, when one of 22nd valve group or the 23rd valve group break down, control this reactive power compensator and enter first method of operation, first method of operation and second method of operation standby operation mode each other, first method of operation makes with the switching of second method of operation in the case of tunable capacitor capacity is constant only by controlling the switching realization input alternate identical compensation capacitance of distribution system of different valve group.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107769222A (en) * | 2017-11-22 | 2018-03-06 | 南京亚派科技股份有限公司 | A kind of power for two-phase seam welder adjusts compensation device |
| CN108173271A (en) * | 2016-12-07 | 2018-06-15 | 南京南瑞继保电气有限公司 | A kind of subsynchronous oscillation damping control system of redundancy structure |
| CN109001591A (en) * | 2018-06-19 | 2018-12-14 | 国网江苏省电力有限公司电力科学研究院 | A kind of 10kV power distribution network primary equipment intelligence fortune inspection engineering test platform |
| CN113691191A (en) * | 2021-08-26 | 2021-11-23 | 中铁第四勘察设计院集团有限公司 | A device and method for reducing the supply voltage of a long stator synchronous linear motor stator |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100237835A1 (en) * | 2009-03-18 | 2010-09-23 | Mitsubishi Electric Corporation | Reactive power compensator |
| CN204068273U (en) * | 2014-07-25 | 2014-12-31 | 安徽天瞳智能科技有限公司 | A kind of highly sensitive reactive power compensator |
| CN205829174U (en) * | 2016-07-02 | 2016-12-21 | 周岳 | A kind of reactive power compensator |
-
2016
- 2016-07-02 CN CN201610508799.4A patent/CN106026124B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100237835A1 (en) * | 2009-03-18 | 2010-09-23 | Mitsubishi Electric Corporation | Reactive power compensator |
| CN204068273U (en) * | 2014-07-25 | 2014-12-31 | 安徽天瞳智能科技有限公司 | A kind of highly sensitive reactive power compensator |
| CN205829174U (en) * | 2016-07-02 | 2016-12-21 | 周岳 | A kind of reactive power compensator |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108173271A (en) * | 2016-12-07 | 2018-06-15 | 南京南瑞继保电气有限公司 | A kind of subsynchronous oscillation damping control system of redundancy structure |
| CN108173271B (en) * | 2016-12-07 | 2020-01-10 | 南京南瑞继保电气有限公司 | Subsynchronous oscillation damping control system with redundant structure |
| CN107769222A (en) * | 2017-11-22 | 2018-03-06 | 南京亚派科技股份有限公司 | A kind of power for two-phase seam welder adjusts compensation device |
| CN109001591A (en) * | 2018-06-19 | 2018-12-14 | 国网江苏省电力有限公司电力科学研究院 | A kind of 10kV power distribution network primary equipment intelligence fortune inspection engineering test platform |
| CN113691191A (en) * | 2021-08-26 | 2021-11-23 | 中铁第四勘察设计院集团有限公司 | A device and method for reducing the supply voltage of a long stator synchronous linear motor stator |
| CN113691191B (en) * | 2021-08-26 | 2023-05-30 | 中铁第四勘察设计院集团有限公司 | Device and method for reducing power supply voltage of long-stator synchronous linear motor stator |
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