CN1945963A - DC bus powered crane power system - Google Patents
DC bus powered crane power system Download PDFInfo
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- CN1945963A CN1945963A CNA2006100624068A CN200610062406A CN1945963A CN 1945963 A CN1945963 A CN 1945963A CN A2006100624068 A CNA2006100624068 A CN A2006100624068A CN 200610062406 A CN200610062406 A CN 200610062406A CN 1945963 A CN1945963 A CN 1945963A
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- 238000009826 distribution Methods 0.000 claims abstract description 23
- 238000004146 energy storage Methods 0.000 claims abstract description 23
- 238000006243 chemical reaction Methods 0.000 claims abstract description 17
- 230000001172 regenerating effect Effects 0.000 claims description 5
- 239000003990 capacitor Substances 0.000 claims description 4
- 238000003860 storage Methods 0.000 claims description 3
- 230000005284 excitation Effects 0.000 claims description 2
- 230000001360 synchronised effect Effects 0.000 claims description 2
- 238000005183 dynamical system Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 8
- 238000010248 power generation Methods 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 231100000331 toxic Toxicity 0.000 description 3
- 230000002588 toxic effect Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 238000005381 potential energy Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
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Abstract
This invention discloses a hoist power system supplied by DC bus including a generator set, a supply and distribution system, a frequency conversion system and a speed regulation motor, in which, the supply and distribution system includes a large power commutation device, a DC bus and an energy management unit, the DC bus is parallel with a DC energy-storage device capable of supplying the conversion system at the same time, which includes several inverters connected on the DC bus, the speed regulation motor is a lifted motor, a jumbo motor or a trolley motor, in which, the lifted motor is converted to generator mode to store the re-generated energy source to an energy storage device when a lifted subject falls, the energy management unit controls the operation speed and generation volume of the generator set to realize real time match of output power and load power.
Description
Technical field
The present invention relates to the crane technical field, especially relate to the improvement of the dynamical system of hoisting equipment.Be applicable to the heavy duty crane that has generating set in zones such as harbour, harbour, be mainly used in big-and-middle-sized harbour loop wheel machine, be specially adapted to gantry.
Background technology
The present harbour portable heavy duty crane that has generating set, general dynamical system configuration is to adopt high-power internal combustion engine generator group constant speed (power frequency) power generation mode, send three-phase alternating current, be sent to each by power supply-distribution system and use electric loading, the lifting motor, cargo motor and the vehicle motor that are supplied to different frequency converters to drive, and other auxiliary power consumption equipment.Its principle as shown in Figure 1, frequency converter is by AC/DC/AC secondary conversion.
The dynamical system of conventional crane adopts the generating of power frequency generating set, and by ac bus, with the input interface of electric energy transmitting to each power consumption equipment.Because the power consumption equipment of crane is many, load variations is big, the power when installed capacity of generating set must be greater than total Shun of power consumption equipment, and the tube load weight is not always with the constant speed running for generator simultaneously, so the generator oil consumption is very high.
Because the starting current of three phase alternating current motor is bigger, be generally 3 times of motor operate as normal rated current.On crane, the power consumption maximum be again to promote motor, its power even up to hundreds of kilowatts.Therefore generating set installed capacity often is not less than all power of electric motor summations of crane.But the starting time of motor is very short, so cluster engine is in normal operating conditions, and most times are in the light condition of low load with strong power, and real work efficient is very low.The fuel consumption of generating set every day is very surprising, has also caused a large amount of toxic emissions and serious environmental to pollute simultaneously.
Because the restriction of power frequency power generation conditions, even under the very little situation of load, generating set also will turn round by rated speed and keep the stability of frequency of supply.See accompanying drawing 3, generating set often is in work in the lower fuel efficiency interval along with the variation of power output.
Summary of the invention
The technical problem to be solved in the present invention is, in order to remedy the ineffective defective of the cluster engine of crane power system in the prior art, and provides a kind of operating cost low crane power system.
The present invention solves the problems of the technologies described above to adopt following technical scheme:
DC bus powered crane power system comprises the generating set that is installed on the crane, and the power supply-distribution system that is connected with the generating set output obtains the frequency conversion system of electric energy from power supply-distribution system, and the buncher that drives of frequency conversion system.Its main feature is that the alternating current that described power supply-distribution system contains generating set output is transformed to galvanic high-power rectifying device, to the dc bus of frequency conversion system electric energy transmitting and the energy management unit of control generating set power output.When the crane load hour, energy management unit is adjusted the generating set rotating speed automatically, reduces power output until reaching poised state.Be parallel with the dc energy storage device of storage of electrical energy on the dc bus of described power supply-distribution system; When load increased, energy management unit was adjusted the generating set power output automatically and energy storage device is powered to frequency conversion system by dc bus simultaneously.
This crane power system by the high-power rectifying device rectification, is carried out DC bus powered with the ac bus on the dc bus replacement conventional hoist.Energy storage device in parallel on dc bus, each load motor obtains electric energy by supporting inverter from dc bus.And adopting energy management unit to change running speed and the energy output of controlling generating set according to system loading, realization power output and bearing power are mated in real time.
Described dc energy storage device is the large-capacity battery group, or bank of super capacitors.Described generating set is the synchronous or asynchronous alternating current generating sets that becomes the indefinite frequency of power to the speed change of power supply-distribution system output electric energy, or the higher permanent magnet generator unit of efficient.The energy management unit of described power supply-distribution system includes the signal sample circuit of acquisition system parameter, central control circuit; The system parameters that central control circuit is gathered according to signal sample circuit is according to the excitation and the rotating speed of the program control generating set of setting.Described frequency conversion system comprises and directly being connected more than one on the dc bus, and the voltage galvanic current that obtains from power supply-distribution system is converted into the alternating current of voltage, frequency adjustable, satisfies buncher stepless speed control purpose inverter.Described buncher is lifting motor, cargo motor and the vehicle motor that inverter drives.
When the load of crane bigger, power during Shun that the crane power consumption equipment consumes, when the power of power supply-distribution system output, the batteries or the bank of super capacitors that are connected in parallel on the dc bus power to the load by frequency converter with generating set greater than generating set.Therefore the power of the generating set that is equipped with of this dynamical system, power in the time of can be less than total Shun of crane load.Less when the load of crane, the energy storage device electric energy stored is when saturated, and the power output of generating set descends rapidly, even low speed or idle running.
When lifting motor descended at the lifting thing, lifting motor was converted to generator mode, and the potential energy of lifting thing is converted to electric energy through lifting motor.The rectification feedback unit that the inverter of lifting motor contains is converted to the voltage galvanic current with the regenerative electric energy under the generator mode, offers dc bus, and is stored in the energy storage device that is connected in parallel on dc bus.
The dc bus technology is in many motors Alternating Current Governor System, adopts independent generating, rectifying device to provide the direct current energy of certain power for system, and speed governing directly is articulated on the dc bus with inverter.When the machine operation of system during at motoring condition, inverter obtains electric energy from dc bus.Inverter is converted into the AC power of voltage, frequency adjustable to voltage galvanic current source, to satisfy the purpose of motor stepless speed control.When the machine operation of system during at generating state, the rectification feedback unit of inverter directly feeds back to power supply-distribution system by the regenerative electric energy of dc bus with motor, perhaps is stored in the dc energy storage device that is connected in parallel on the dc bus.
Compare with the dynamical system of existing crane, use the advantage of technical solution of the present invention to be:
1. when the load of crane was high-power state, the generating set of crane and dc energy storage device provided electric energy for load simultaneously.Be that the generating set power output adds that the power of dc energy storage device equals the peak power output of crane.Therefore the rated power of generating set can dispose very for a short time, is reduced to 1/2 of conventional crane generating set power, can save great amount of fuel oil, reduces toxic emission more than 50%, reduces the operating cost of crane, has the economic benefit of highly significant.
2. the dc bus technology is applied in the crane power system of many drive of motor, and the feedback energy of motor can be utilized, and the renewable energy resources that produce in motor deceleration, braking procedure are by the feedback dc bus, and system's power consumption efficiency is very high.
3. the generating set working speed can be adjusted automatically according to the load variations of crane, realization power output and bearing power are mated in real time, when duty ratio hour, generating set is under low speed or the idling mode, as shown in Figure 3, can in not too low fuel efficiency interval, work, also help reducing discharging, the energy-saving effect of obtaining.
4. adopt the crane of dc bus dynamical system, compact equipment, working stability.Save ancillary equipment such as brake resistance, energy savings improves the equipment operation reliability, has saved the plant maintenance amount, has reduced the equipment fault point, has improved the whole controlling level of equipment.
Description of drawings
Description of drawings of the present invention is as follows:
Fig. 1 is the principle schematic of existing crane power system.
Fig. 2 is the logic block-diagram of the DC bus powered crane power system of the present invention.
Fig. 3 is the generating set efficiency hill and the constant power curve chart of crane power system.
Fig. 4 is the functional-block diagram of the DC bus powered crane power system of the present invention.
Embodiment
Further specify embodiments of the invention below in conjunction with accompanying drawing.
Fig. 2 is the logic block-diagram of the DC bus powered crane power system of the present invention, comprise the generating set 2 that is installed on the crane, be connected the power supply-distribution system 3 of generating set output, obtain the frequency conversion system 4 of electric energy from power supply-distribution system 3, the buncher 5 that drives with frequency conversion system 4, and with the power supply-distribution system 3 two-way dc energy storage devices 6 that are connected.
The crane power system that the present invention is DC bus powered, operation principle are as shown in Figure 4.Wherein generating set 2 is made up of Diesel engine 21 and asynchronous alternating current generator 22, and the power supply-distribution system 3 that is connected alternating current generator 22 outputs contains rectifying device 31, dc bus 32 and energy management unit 33.Drive the inverter 41 that hoists, cart inverter 42, dolly inverter 43 and the subordinate inverter 44 of lifting motor 51, cargo motor 52, vehicle motor 53 and other load 54.All inverters all are articulated on the dc bus 32, constitute a dc bus governing system.
Be parallel with on the dc bus 32 can storage of electrical energy dc energy storage device 6, this energy storage device 6 is large-capacity battery group or bank of super capacitors.Generating set 2 is by rectifying device 31, to the inverter power supply that directly is connected on the dc bus 32.Inverter is converted into the AC power of voltage, frequency adjustable to voltage galvanic current source, to satisfy the purpose of multiple electric motors stepless speed control.These bunchers 5 all are operated in Fraquent start and on-position, and require to have good speed adjusting performance.
At the normal operating condition of crane, when lifting motor 51 when the lifting thing descends, lifting motor 51 is converted to power generation mode.Hoist rectification feedback unit in the inverter 41 is converted to voltage galvanic current energy with the regenerative electric energy power generation mode under, is transmitted back to dc bus 32 for other power consumption equipment use, perhaps is stored in the energy storage device 6 that is connected in parallel on the dc bus 32.When the load of crane increased, the electric energy that energy storage device 6 is stored just turned back on the dc bus 32, and the electric energy that sends with generating set offers crane load use jointly.
Many bunchers of crane always work in frequent startup, on-position, belong to the load of constant force square, and irregular load shock is arranged, and braking duty ratio height has proposed higher brake request to speed regulating device.Particularly lifting motor is when the lifting thing descends, and load inertia is big, and the energy that feeds back to DC link from motor in a large number will be raised direct voltage.The method of handling feedback energy have many in, it would be desirable motor power is fed back to dc bus.This dynamical system not only performance is good, and operational efficiency is very high, and economical and energy saving.This systems technology content height, stable, the plant maintenance amount reduces greatly.
The dc bus dynamical system of crane is the optimal case that solves many drive of motor technology, has solved the contradiction between the motoring condition and generating state between many motors well.In same system, the synchronization different device can be operated in different states, and generating set 2 and dc energy storage device 6 have guaranteed the stable supplying of dc bus 32 voltages.The rectification feedback unit of inverter is given dc bus 32 with motor 5 Way of Regenerating Energy Feedback again, has realized the reasonable utilization of the renewable energy resources.
Embodiments of the invention can directly select for use the cheap passenger vehicle of large-scale production to discharge engines with Europe 3, and the rated power of the alternating current generator of selecting for use is about 300 kilowatts.20 meters of lifting altitudes, lifting velocity 23 meter per seconds.220 kilowatts of lifting motors, 50 kilowatts of cargo motors, 50 kilowatts of vehicle motors, 50 kilowatts of other load accumulative total less thaies.The consumption of electric power maximum be lifting motor 51, when the counter of lifting when transferring, lifting motor 51 transfers power generation mode to, the potential energy of counter is converted to electric energy through the lifting motor, transfers direct current energy to through the rectification feedback unit and is stored in the energy storage device 6; When the lifting counter, energy storage device 6 is powered simultaneously with generating set 2 and is given lifting motor 51.
Generally using inverter to drive in the load that energy back is arranged all need increase feedback device or brake resistance, otherwise can't use smoothly.Adopt the mode of feedback communication bus, its input cost height.Adopt brake resistance because feedback energy is big, consumed power is very big, is more uneconomic method.The electric energy regeneration that load inertia produces, also be the native system key technology.
Utilize patented technology of the present invention, maximum characteristics are, the power output of the internal combustion engine that system adopted, generally adopt the internal combustion engine power output of generating set of crane power system of ac bus little more than 50% than same level, the non-constant speed of the operating condition of engine in addition, promptly generating set needn't be operated under the fixing frequency, is a kind of variable-frequency power generation device, can allow internal combustion engine in rotating speed interval, so discharging significantly reduces than higher fuel efficiency.The oil consumption of conventional hoisting machine can be reduced 50%, can reduce the toxic emission of engine simultaneously significantly, can reduce by 80% exhaust emission.Reduce operating cost significantly, reduced production cost and maintenance cost, therefore the economic benefit highly significant has very high promotional value.
Claims (10)
1. DC bus powered crane power system, comprise the generating set (2) that is installed on the crane, the power supply-distribution system (3) that is connected with generating set (2) output, obtain the frequency conversion system (4) of electric energy from power supply-distribution system (3), and the buncher (5) that drives of frequency conversion system (4); It is characterized in that: the alternating current that described power supply-distribution system (3) contains generating set (2) output is transformed to galvanic high-power rectifying device (31), to the dc bus (32) of frequency conversion system (4) electric energy transmitting and the energy management unit (33) of control generating set (2) power output; When the crane load hour, energy management unit (33) is adjusted generating set (2) rotating speed automatically, reduces power output until reaching poised state.
2. crane power system according to claim 1 is characterized in that: the dc energy storage device (6) that is parallel with storage of electrical energy on the dc bus (32) of described power supply-distribution system (3); When load increased, energy management unit (33) adjusts generating set (2) power output automatically and energy storage device (6) is given frequency conversion system (4) power supply by dc bus (32) simultaneously.
3. crane power system according to claim 2 is characterized in that: described dc energy storage device (6) is large-capacity battery group or bank of super capacitors.
4. crane power system according to claim 2 is characterized in that: described generating set (2) is for providing the synchronous or asynchronous alternating current generating sets or the permanent magnet generator unit of the indefinite frequency of electric energy to power supply-distribution system (3).
5. crane power system according to claim 2 is characterized in that: the energy management unit (33) of described power supply-distribution system (3) includes the signal sample circuit of acquisition system parameter, central control circuit; The system parameters that central control circuit is gathered according to signal sample circuit is according to the excitation and the rotating speed of the program control generating set of setting (2).
6. crane power system according to claim 2, it is characterized in that: described frequency conversion system (4) comprises and being connected more than one on the dc bus (32), the voltage galvanic current source that obtains from power supply-distribution system (3) is converted into the AC power of voltage, frequency adjustable, satisfies the inverter of buncher (5) stepless speed control purpose.
7. crane power system according to claim 6 is characterized in that: lifting motor (51), cargo motor (52) and vehicle motor (53) that described buncher (5) drives for inverter.
8. crane power system according to claim 7 is characterized in that: described lifting motor (51) is converted to generator mode when being operated in landing lifting thing state.
9. crane power system according to claim 8, it is characterized in that: the inverter of described frequency conversion system (4) includes the rectification feedback unit, regenerative electric energy under the generator mode is converted to the voltage galvanic current, is stored in the energy storage device (6) that is connected in parallel on the dc bus (32) by dc bus (32).
10. crane power system according to claim 6 is characterized in that: frequency conversion system (4) also comprises and being connected on the dc bus (32), and the subordinate inverter (44) of industrial-frequency alternating current is provided for other loads (54).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNA2006100624068A CN1945963A (en) | 2006-09-01 | 2006-09-01 | DC bus powered crane power system |
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| CNA2006100624068A CN1945963A (en) | 2006-09-01 | 2006-09-01 | DC bus powered crane power system |
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| CN1945963A true CN1945963A (en) | 2007-04-11 |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102115015A (en) * | 2010-01-04 | 2011-07-06 | 株式会社日立产机系统 | Hoister |
| CN102171131A (en) * | 2008-10-02 | 2011-08-31 | 三井造船株式会社 | Crane system and method of controlling crane |
| CN102167260A (en) * | 2010-11-30 | 2011-08-31 | 大连华锐股份有限公司 | Fault redundancy protection system and method for variable frequency speed regulation of ladle crane |
| CN102666355A (en) * | 2009-09-23 | 2012-09-12 | 普芬宁埃列克特罗安拉根有限公司 | gantry lift truck for use in container terminals and for general transport purposes |
| CN101521470B (en) * | 2009-03-26 | 2012-10-03 | 严兆基 | Power supply method and power supply system for rubber-tyred container gantry crane |
| CN105811464A (en) * | 2016-05-12 | 2016-07-27 | 大工（青岛）新能源材料技术研究院有限公司 | Grouping running control method for multiple natural gas power generators |
| CN106487313A (en) * | 2015-09-02 | 2017-03-08 | 东元电机股份有限公司 | Frequency conversion servo system and real-time power distribution method thereof |
| CN109142959A (en) * | 2018-10-31 | 2019-01-04 | 西安热工研究院有限公司 | A kind of thermal power plant's variable-frequency power generation system for capableing of earthing detection and ground detecting method |
| CN109552065A (en) * | 2018-11-13 | 2019-04-02 | 武汉理工大学 | A kind of hybrid power system and its working method based on super capacitor group |
| CN114590731A (en) * | 2022-05-11 | 2022-06-07 | 新风光电子科技股份有限公司 | Self-adaptive coal mine hoisting winch frequency conversion method |
| CN115603378A (en) * | 2022-10-20 | 2023-01-13 | 上海海得控制系统股份有限公司（Cn） | A power distribution control method, control circuit and computer storage medium |
| CN116395565A (en) * | 2023-03-01 | 2023-07-07 | 北京首钢股份有限公司 | Crane, hoisting device and control method thereof, control device and control equipment |
-
2006
- 2006-09-01 CN CNA2006100624068A patent/CN1945963A/en active Pending
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102171131A (en) * | 2008-10-02 | 2011-08-31 | 三井造船株式会社 | Crane system and method of controlling crane |
| CN101521470B (en) * | 2009-03-26 | 2012-10-03 | 严兆基 | Power supply method and power supply system for rubber-tyred container gantry crane |
| CN102666355A (en) * | 2009-09-23 | 2012-09-12 | 普芬宁埃列克特罗安拉根有限公司 | gantry lift truck for use in container terminals and for general transport purposes |
| CN102666355B (en) * | 2009-09-23 | 2015-04-01 | 普芬宁埃列克特罗安拉根有限公司 | Gantry lift trucks for container terminals and for general transport purposes |
| CN102115015A (en) * | 2010-01-04 | 2011-07-06 | 株式会社日立产机系统 | Hoister |
| CN102167260A (en) * | 2010-11-30 | 2011-08-31 | 大连华锐股份有限公司 | Fault redundancy protection system and method for variable frequency speed regulation of ladle crane |
| CN102167260B (en) * | 2010-11-30 | 2013-04-03 | 大连华锐重工集团股份有限公司 | Fault redundancy protection system and method for variable frequency speed regulation of ladle crane |
| CN106487313A (en) * | 2015-09-02 | 2017-03-08 | 东元电机股份有限公司 | Frequency conversion servo system and real-time power distribution method thereof |
| CN106487313B (en) * | 2015-09-02 | 2018-09-14 | 东元电机股份有限公司 | Frequency conversion servo system and real-time power distribution method thereof |
| CN105811464A (en) * | 2016-05-12 | 2016-07-27 | 大工（青岛）新能源材料技术研究院有限公司 | Grouping running control method for multiple natural gas power generators |
| CN105811464B (en) * | 2016-05-12 | 2018-10-12 | 青岛海聚仿真软件技术有限公司 | A kind of more natural gas generators marshalling progress control method |
| CN109142959A (en) * | 2018-10-31 | 2019-01-04 | 西安热工研究院有限公司 | A kind of thermal power plant's variable-frequency power generation system for capableing of earthing detection and ground detecting method |
| CN109142959B (en) * | 2018-10-31 | 2023-11-07 | 西安热工研究院有限公司 | Thermal power plant variable frequency power generation system capable of performing grounding detection and grounding detection method |
| CN109552065A (en) * | 2018-11-13 | 2019-04-02 | 武汉理工大学 | A kind of hybrid power system and its working method based on super capacitor group |
| CN114590731A (en) * | 2022-05-11 | 2022-06-07 | 新风光电子科技股份有限公司 | Self-adaptive coal mine hoisting winch frequency conversion method |
| CN115603378A (en) * | 2022-10-20 | 2023-01-13 | 上海海得控制系统股份有限公司（Cn） | A power distribution control method, control circuit and computer storage medium |
| CN116395565A (en) * | 2023-03-01 | 2023-07-07 | 北京首钢股份有限公司 | Crane, hoisting device and control method thereof, control device and control equipment |
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