CN201075663Y - Voltage differential device controller - Google Patents
Voltage differential device controller Download PDFInfo
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- CN201075663Y CN201075663Y CNU2007200570462U CN200720057046U CN201075663Y CN 201075663 Y CN201075663 Y CN 201075663Y CN U2007200570462 U CNU2007200570462 U CN U2007200570462U CN 200720057046 U CN200720057046 U CN 200720057046U CN 201075663 Y CN201075663 Y CN 201075663Y
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Abstract
The utility model provides a voltage differential device controller, which is composed of a three-phase supply air switch circuit, a supply voltage detecting circuit T5, a voltage difference sample circuit T6 and a signal magnification drive circuit. When the zero line of the three-phase four-line power supply grid system in the urban or rural area suffers open-phase disjunction accident of the distributing network system and the electric transmission line of the distributing network has high resistance to the earth, the utility model provides an automatic control device which can immediately exert the relay protection function and compulsorily separates the branch power supply from a grid, so as to ensure the safety of the electric facilities.
Description
[technical field]
The differential voltage Setup Controller relates to the power supply control technology field of city and rural area power generating facilities and power grids system, when phase voltage produces pressure reduction when uneven, realizes a kind of control device of disjunction power supply automatically.
[background technology]
At present, do not see delivering of professional paper as yet, do not see the publication of patent documentation yet, do not have product to apply among the actual motion Control work yet with the utlity model has identical and akin technical scheme.The utility model is a kind of technical scheme with original creation meaning of this type of technology in the industry.
[summary of the invention]
The purpose of this utility model is; when city or the disconnected zero generation voltage phase difference of rural area three-phase four-wire power network system; distribution network system phase shortage disjunction accident takes place; when taking place distribution network transmission line high resistant to earth fault; a kind of relaying protection function of bringing into play immediately is provided; branch supply is forced to withdraw from operation of power networks, guarantee the automatic control equipment of electricity consumption installation security.
Accompanying drawings is as follows:
The differential voltage Setup Controller that differential voltage Setup Controller, particularly three phase mains air switch circuit, voltage detection circuit T5, voltage difference sample circuit T6 and signal amplification driving circuit constitute is characterized in that:
On the A phase load power supply air switch KA is installed, stake power supply voltage signal input 3 on the KA air switch, be connected to the inductance L A input 17 of testing circuit transformer T5, be connected to the input 27 of voltage difference sample circuit transformer T6 through inductance L A output 18, this input 27 also is analogue ground point N1; Signal is through 27 inputs at the N1 of T6 transformer end place, is connected to N line ground connection via the output 28 of T6 transformer and constitutes A phase power supply voltage signal sampling circuit;
On the B phase load power supply air switch KB is installed, stake power supply voltage signal input 7 on the KB air switch, be connected to the inductance L B input 15 of testing circuit transformer T5, the input 27 that is connected to voltage difference sample circuit transformer T6 through inductance L B output 16 is analogue ground point N1; Signal is through 27 inputs at the N1 of T6 transformer end place, is connected to N line ground connection via the output 28 of T6 transformer and constitutes B phase power supply voltage signal sampling circuit;
On the C phase load power supply air switch KC is installed, stake power supply voltage signal input 11 on the KC air switch, be connected to the inductance L C input 13 of testing circuit transformer T5, the input 27 that is connected to voltage difference sample circuit transformer T6 through inductance L C output 14 is analogue ground point N1; Signal is through 27 inputs at the N1 of T6 transformer end place, is connected to N line ground connection via the output 28 of T6 transformer and constitutes C phase power supply voltage signal sampling circuit;
Because the LA of testing circuit T5, LB, LC and analogue ground point N1 constitute Y-connection and directly play the function of detection power-supply system voltage vector, when T5 testing circuit voltage vector signal is input to T6 sampling transformer, 27 28 connection N line ground connection of N1 end via the T6 transformer, forming signal magnetizes by the magnetic flux self-induction action through the T6 transformer core, with the vector voltage conversion of signals is drive voltage signal, be connected to the 31 ends input of auxiliary relay K by 29 end points of T6 transformer, be connected to 30 of T6 transformer via the 35 ends output of relay K and constitute and drive loops;
The voltage detecting vector signal that forms among T5 and the T6 is converted to the action response function by auxiliary relay K; 36 end points of auxiliary relay K are connected in power supply phase voltage L end; T6 transformer signal converter output 29 points, 31 end points that are connected in relay K are imported, and are connected in 30 generation voltage drive signals of T6 transformer by 35 outputs of auxiliary relay K; Following variation appears in KA, KB, each phase air switch of KC under the combined floodgate operating state at this moment;
1 end points of A phase KA connects 39 end points of K, when K moving when closing state, 36 end points based on the K relay are connected in the L power end, therefore source current is flowed through 39 endpoint stream of K relay to 1 end of KA air switch because of the K relay closes a floodgate, 2 end points by the shunt opening trip coil KA switch of KA switch, output is connected in the N line and forms KA switch shunt opening coil dropout trip(ping) circuit, when making the KA switch in T5 detector, T6 transformer, produce voltage differential signal response action, make the instantaneous disjunction A of KA switch phase power circuit;
5 end points of B phase KB connect 38 end points of K, when K moving when closing state, 36 end points based on the K relay are connected in the L power end, therefore source current is flowed through 38 endpoint stream of K relay to 5 ends of KB air switch because of the K relay closes a floodgate, 6 end points output by the shunt opening trip coil KB switch of KB switch, be connected in the N line and form KB switch shunt opening coil dropout trip(ping) circuit, when making the KB switch in T5 detector, T6 transformer, produce voltage differential signal response action, make the instantaneous disjunction B of KB switch phase power circuit;
9 end points of C phase KC connect 37 end points of K, when K moving when closing state, 36 end points based on the K relay are connected in the L power end, therefore source current 9 ends of 37 ends stream KC air switch of K relay of flowing through because of the K relay closes a floodgate, 10 end points output by the shunt opening trip coil KC switch of KC switch, be connected in the N line and form KC switch shunt opening coil dropout trip(ping) circuit, when making the KC switch in T5 detector, T6 transformer, produce voltage differential signal response action, make the instantaneous disjunction C of KC switch phase power circuit;
Secondary pair of coil of T5 testing circuit in the differential voltage checkout gear is to form a three-phase superposing type DC power supply VCC; Its VCC is the DC power supply voltage end of 12V, 33 ends that connect the normally closed button of reset switch H1, the negative pole that connects the D1 rectifier diode by 32 ends of H1 button, connect 19 ends of the secondary inductance secondary coil LK1 of T5 detector via the positive pole of D1 diode, from the 26 ends formation three-phase Y-connection loop of 20 ends with 22 ends and the LK3 of inductance secondary coil LK2 of LK1 coil;
The VCC end connects 33 ends of H1 button, the negative pole that connects the D2 rectifier diode by 32 ends of H1 button, connect 21 ends of the secondary inductance secondary coil LK2 of T5 detector by the positive pole of D2 diode, from the 26 ends formation three-phase Y-connection loop of 22 ends with 20 ends and the LK3 of inductance secondary coil LK1 of LK2 coil;
The VCC end connects 33 ends of H1 button, the negative pole that connects the D3 rectifier diode by 32 ends of H1 button, connect 25 ends of the secondary inductance secondary coil LK3 of T5 detector by the positive pole of D3 utmost point pipe, from the 22 ends formation three-phase Y-connection loop of 26 ends with 20 ends and the LK2 coil of inductance secondary coil LK1 of LK3 coil;
Three-phase superposing type dc power supply circuit is 32 points that are connected in the H1 button by the positive pole of the positive pole of C1 capacitor and C2 capacitor, and to electric capacity charging, 34 end points of the minus earth by C1 electric capacity and C2 electric capacity carry out filter action; The DC power supply quality is guaranteed;
23 end points of T5 checkout gear secondary inductance secondary coil LT, insert 41 ends that sense switch H2 often leaves button, be connected in 31 ends of K relay via 42 ends of H2 button, be connected to 30 ends of T6 transformer by 35 ends of K relay, electromagnetic coupled by the T6 transformer is docked with N1 by 24 of T5 detector coil LT, constitute the analog loopback identical with power phase polarity, produce the simulation differential wave, whether check K relay operating state is normal;
The positive pole of D4 light-emitting diode is connected in 40 ends of K relay, and the negative pole of D4 light-emitting diode is connected in the N1 end of T6 transformer, when the K auxiliary relay is subjected to differential voltage vector signal driving combined floodgate, be connected in 36 ends of K relay based on the L power supply, close a floodgate in the contact of K relay, power supply is connected in N1 by the output of D4 light-emitting diode negative pole and is formed bright lamp indication loop by the 40 end points input D4 light-emitting diode positive pole of K relay; Whether checking K relay operating state is normal;
Signal amplifying relay K is that relay of photoelectricity coupled signal amplifier serial connection is formed; System's imbalance of three-phase voltage vector value is selected scope 5%～100%, and the time of selecting can be adjusted 1ms～60s; System can adjust 1ms～60s the phase shortage voltage sample time; The uneven phase voltage of disconnected zero threephase load of system, the action parameter setting range in 220V ± 10%-± 80% between.
Positive effect of the present utility model is, the differential relaying protection of no-voltage phase place of breaking of (1) system.Be applicable to for power distribution network zone branch system disconnected zero and produce each phase load inequality; cause each phase deviation; cause the phase voltage difference greater than rated voltage＞10% amplitude; when system's phase voltage deviation 〉=13%; the utility model sends the instruction of differential voltage defencive function immediately, and along separate routes disconnected nulling loop system is forced to withdraw from operation of power networks.Guaranteed numerous citizen and electricity consumption user, all electricity consumption facilities not reason system break nulling loop and burn.Its relaying protection function has ensured user power utilization safety, benefits broad masses of the people.(2) distribution network system phase shortage relaying protection.When being applicable to for the operation of distribution network system three phase supply, when putting into operation or in the running, phase-deficient operation appears suddenly in grid.This moment because controller built-in voltage differential detection device, when recording system power supply voltage three phasor1s and being not equal to zero, differential voltage pattern detection time 200ms; Send the open-phase protection function command immediately, branch supply is forced to withdraw from operation of power networks, guarantee that the electricity consumption facility can not suffer damage because of phase-deficient operation.(3) distribution network transmission line high resistant is to the earth fault relaying protection.Be applicable to for the distribution transmission line,, form single-phase voltage and descend, cause imbalance of three-phase voltage degree 〉=15% because the force majeure factor causes the single-phase high resistant shorted to earth of feeder line.Because the relaying protection function command is sent in the effect of differential voltage measuring ability immediately, branch supply is forced to withdraw from operation of power networks this moment, guarantee the electricity consumption installation security.
[description of drawings]
Fig. 1 is the utility model circuit theory diagrams.
[specific embodiments] is according to the described detailed technology scheme of this specification, employing meets the Electronic Design and the electrical design standard of national standard, formulate process for machining and manufacturing method and explanation, selection standard insulation and conductive material, the module of selection standard, chip, device, parts can be produced the utility model product.
Scope of application parameter:
Low pressure supply and distribution network subscriber's drop system phase shortage, system disconnected zero (N), system's imbalance of three-phase voltage value 〉=15% relaying protection effect.
The service condition parameter:
The utility model is applicable to and exchanges the relaying protection of 380V/220V low pressure electricity consumption facility;
Ambient temperature :-25 ℃-55 ℃;
During 40 ℃ of relative humidity, 20%-90%;
Atmospheric pressure: at the following 79.5-106.0Kpa of 2000m above sea level;
Workplace: the place that works in no obvious conductivity dust, no inflammable, explosive medium;
Operating voltage: rated voltage 380V/220V;
Permissible variation: three-phase voltage change synchronously be not more than ± 20%;
Waveform: sine wave, the distortion factor is less than 8%;
Rated frequency: 50Hz ± 5%;
Working power: three-phase four-wire power.
On the A phase load power supply air switch KA is installed, KA input 3 is connected to the inductance main coil LA input 17 of resin cast dry-type transformer T5, and the input 27 that is connected to resin cast dry-type transformer T6 through LA output 18 is analogue ground point N1; Signal is through 27 inputs at the N1 of T6 end place, is connected to N line ground connection via the output 28 of T6;
On the B phase load power supply air switch KB is installed, KB input 7 is connected to the coil LB input 15 of T5, and the input 27 that is connected to T6 through LB output 16 is analogue ground point N1; Signal is through 27 inputs at the N1 of T6 end place, is connected to N line ground connection via the output 28 of T6;
On the C phase load power supply air switch KC is installed, KC input 11, the coil LC input 13 of connection T5, the input 27 that is connected to T6 through LC output 14 is analogue ground point N1; Signal is through 27 inputs at the N1 of T6 end place, is connected to N line ground connection via the output 28 of T6;
The number of turn of LA, LB, LC is consistent with specification;
T5 voltage vector signal is input to T6, and 27 at N1 end connects N line ground connection via 28 of T6, forms drive voltage signal, is connected to the 31 ends input of auxiliary relay K by 29 end points of T6, connects 30 points of T6 via the 35 ends output of K; Voltage signal among T5 and the T6 is converted to the action response function by K; 36 end points of K are connected in power supply L end; 29 of T6 outputs are connected in the 31 end points input of K, by 35 30 generation voltage drive signals that are connected in T6 of K; T5 is set at 25-50V to the startup operating voltage between the T6.
1 end points of A phase KA connects 39 end points of K, when K moving when closing state, 36 end points based on K are connected in the L end, therefore source current is because of K 1 end of 39 endpoint stream to KA of flowing through that close a floodgate, 2 end points by the shunt opening trip coil of KA, output is connected in the N line, when making the KA switch produce voltage differential signal response action in T5, T6, makes the instantaneous disjunction A of KA switch phase power circuit;
5 ends of B phase KB connect 38 ends of K, when K moving when closing state, 36 ends based on K are connected in the L end, therefore electric current 5 ends of 38 ends stream KB of flowing through because of K closes a floodgate, 6 end points output by KB, be connected in the N line, when making the KB switch in T5, T6, produce voltage differential signal response action, make the instantaneous disjunction B of KB switch phase power circuit;
9 ends of C phase KC connect 37 ends of K, when K moving when closing state, 36 ends based on K connect the L end, therefore source current 9 ends of 37 ends stream KC of flowing through because of K closes a floodgate, 10 end points output by KC, be connected in the N line, when making the KC switch in T5, T6, produce voltage differential signal response action, make the instantaneous disjunction C of KC switch phase power circuit; The voltage of L end-N end is alternating current 220V;
T5 level paid coil and formed three-phase superposing type DC power supply VCC; Its VCC voltage 12V connects 33 ends of the H1 button that resets, and connects D1 rectifier diode negative pole by 32 ends of H1, connects 19 ends of the coil LK1 of T5 via the positive pole of D1; VCC end connects 33 ends of H1 button, connects the negative pole of D2 by 32 ends of H1, is connected 21 ends of T5 secondary coil LK2 by the positive pole of D2; VCC end connects 33 ends of H1 button, connects the negative pole of D3 rectifier diode by 32 ends of H1 button, is connected 25 ends of T5 secondary coil LK3 by the positive pole of D3;
D1, D2, D3 specification unanimity, its rectified current scope is chosen between 500MA-2A;
Three-phase superposing type dc power supply circuit is 32 points that are connected in the H1 button by the positive pole of the positive pole of C1 capacitor and C2 capacitor, and to electric capacity charging, 34 end points of the minus earth by C1 electric capacity and C2 electric capacity carry out filter action; The DC power supply quality is guaranteed; C1, C2 specification unanimity are chosen in 10 μ F-400 μ F scopes.
The number of turn of LK1, LK2, LK3 is consistent with specification, and is complementary with generation 12V direct voltage.
23 terminations of the secondary coil LT of T5 are gone into sense switch H2 and are often opened button 41 ends, be connected in 31 ends of K via 42 ends of H2 button, be connected to 30 ends of T6 transformer by 35 ends of K relay, electromagnetic coupled by the T6 transformer is docked with N1 by 24 of T5 detector coil LT, constitute the analog loopback identical with power phase polarity, produce the simulation differential wave, whether check K relay operating state is normal;
The number of turn of LT and specification and 10V direct-current working volts are complementary.
The positive pole of D4 light-emitting diode is connected in 40 ends of K, and the negative pole of D4 is connected in the N1 end of T6, when K is subjected to differential voltage vector signal driving combined floodgate, be connected in 36 ends of K based on L, close a floodgate in the contact of K, power supply is connected in N1 by the output of D4 negative pole and is formed the bright lamp check of D4 loop by the 40 end points input D4 positive pole of K;
Signal amplifying relay K is that relay of photoelectricity coupled signal amplifier serial connection is formed; System's imbalance of three-phase voltage vector values samples scope is 5%～100%, and can adjust 1ms～60s detection time; System can adjust 1ms～60s the phase shortage voltage sample time; The uneven phase voltage of disconnected zero threephase load of system, the action parameter setting range in 220V ± 10%-± 80% between.
Claims (3)
1. the differential voltage Setup Controller that constitutes of differential voltage Setup Controller, particularly three phase mains air switch circuit, voltage detection circuit T5, voltage difference sample circuit T6 and signal amplification driving circuit is characterized in that:
On the A phase load power supply air switch KA is installed, stake power supply voltage signal input 3 on the KA air switch, be connected to the inductance L A input 17 of testing circuit transformer T5, be connected to the input 27 of voltage difference sample circuit transformer T6 through inductance L A output 18, this input 27 also is analogue ground point N1; Signal is through 27 inputs at the N1 of T6 transformer end place, is connected to N line ground connection via the output 28 of T6 transformer and constitutes A phase power supply voltage signal sampling circuit;
On the B phase load power supply air switch KB is installed, stake power supply voltage signal input 7 on the KB air switch, be connected to the inductance L B input 15 of testing circuit transformer T5, the input 27 that is connected to voltage difference sample circuit transformer T6 through inductance L B output 16 is analogue ground point N1; Signal is through 27 inputs at the N1 of T6 transformer end place, is connected to N line ground connection via the output 28 of T6 transformer and constitutes B phase power supply voltage signal sampling circuit;
On the C phase load power supply air switch KC is installed, stake power supply voltage signal input 11 on the KC air switch, be connected to the inductance L C input 13 of testing circuit transformer T5, the input 27 that is connected to voltage difference sample circuit transformer T6 through inductance L C output 14 is analogue ground point N1; Signal is through 27 inputs at the N1 of T6 transformer end place, is connected to N line ground connection via the output 28 of T6 transformer and constitutes C phase power supply voltage signal sampling circuit;
Be connected to the 31 ends input of auxiliary relay K by 29 end points of T6 transformer, be connected to 30 of T6 transformer via the 35 ends output of relay K and constitute and drive loops;
Connect 39 end points of K by 1 end points of A phase KA, 2 end points of KA switch, output is connected in the N line and forms KA switch shunt opening coil dropout trip(ping) circuit;
Connect 38 end points of K by 5 end points of B phase KB, 6 end points of KB switch, output is connected in the N line and forms KB switch shunt opening coil dropout trip(ping) circuit;
Connect 37 end points of K by 9 end points of C phase KC, 10 end points of KC switch, output is connected in the N line and forms KC switch shunt opening coil dropout trip(ping) circuit.
2. according to the described differential voltage Setup Controller of claim 1, it is characterized in that:
Secondary pair of coil of T5 testing circuit in the differential voltage checkout gear formed a three-phase superposing type DC power supply VCC; Its VCC is the DC power supply voltage end of 12V, 33 ends that connect the normally closed button of reset switch H1, the negative pole that connects the D1 rectifier diode by 32 ends of H1 button, connect 19 ends of the secondary inductance secondary coil LK1 of T5 detector via the positive pole of D1 diode, from the 26 ends formation three-phase Y-connection loop of 20 ends with 22 ends and the LK3 of inductance secondary coil LK2 of LK1 coil;
The VCC end connects 33 ends of H1 button, the negative pole that connects the D2 rectifier diode by 32 ends of H1 button, connect 21 ends of the secondary inductance secondary coil LK2 of T5 detector by the positive pole of D2 diode, from the 26 ends formation three-phase Y-connection loop of 22 ends with 20 ends and the LK3 of inductance secondary coil LK1 of LK2 coil;
The VCC end connects 33 ends of H1 button, the negative pole that connects the D3 rectifier diode by 32 ends of H1 button, connect 25 ends of the secondary inductance secondary coil LK3 of T5 detector by the positive pole of D3 diode, from the 22 ends formation three-phase Y-connection loop of 26 ends with 20 ends and the LK2 coil of inductance secondary coil LK1 of LK3 coil;
Three-phase superposing type dc power supply circuit is 32 points that are connected in the H1 button by the positive pole of the positive pole of C1 capacitor and C2 capacitor, and to electric capacity charging, 34 end points of the minus earth by C1 electric capacity and C2 electric capacity carry out filtering.
3. according to claim 1,2 described differential voltage Setup Controllers, it is characterized in that:
23 end points of T5 checkout gear secondary inductance secondary coil LT, insert 41 ends that sense switch H2 often leaves button, be connected in 31 ends of K relay via 42 ends of H2 button, be connected to 30 ends of T6 transformer by 35 ends of K relay, electromagnetic coupled by the T6 transformer is docked with N1 by 24 of T5 detector coil LT, constitutes the analog loopback identical with power phase polarity;
The positive pole of D4 light-emitting diode is connected in 40 ends of K relay, and the negative pole of D4 light-emitting diode is connected in the N1 end of T6 transformer, when the K auxiliary relay is subjected to differential voltage vector signal driving combined floodgate, be connected in 36 ends of K relay based on the L power supply, close a floodgate in the contact of K relay, power supply is connected in N1 by the output of D4 light-emitting diode negative pole and is formed bright lamp indication loop by the 40 end points input D4 light-emitting diode positive pole of K relay;
Signal amplifying relay K is that relay of photoelectricity coupled signal amplifier serial connection is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200570462U CN201075663Y (en) | 2007-09-17 | 2007-09-17 | Voltage differential device controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200570462U CN201075663Y (en) | 2007-09-17 | 2007-09-17 | Voltage differential device controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201075663Y true CN201075663Y (en) | 2008-06-18 |
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ID=39520920
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200570462U Expired - Fee Related CN201075663Y (en) | 2007-09-17 | 2007-09-17 | Voltage differential device controller |
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| Country | Link |
|---|---|
| CN (1) | CN201075663Y (en) |
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2007
- 2007-09-17 CN CNU2007200570462U patent/CN201075663Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Guangzhou Suixinglong Electric Co., Ltd. Assignor: Su Jiongfan Contract record no.: 2010440000907 Denomination of utility model: Voltage differential device controller Granted publication date: 20080618 License type: Exclusive License Record date: 20100706 |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080618 Termination date: 20120917 |