CN100580835C - Breaker synchronous controller and control method thereof - Google Patents
Breaker synchronous controller and control method thereof Download PDFInfo
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- CN100580835C CN100580835C CN200810010709A CN200810010709A CN100580835C CN 100580835 C CN100580835 C CN 100580835C CN 200810010709 A CN200810010709 A CN 200810010709A CN 200810010709 A CN200810010709 A CN 200810010709A CN 100580835 C CN100580835 C CN 100580835C
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Abstract
The invention relates to a breaker synchronous controller and the control method thereof, which realize synchronous control of a medium-high voltage breaker by modern powder electronic technology, belonging to the field of breaker controller technology in power supply. The synchronous controller comprises a voltage current sensor, a DSP controller, a power electronic module and the driving module thereof, a zero-crossing comparison circuit, a DSP control circuit consisting of a parallel wave shaping circuit, a level translation circuit, a DSP chip and an EEPROM for storing the characteristic parameters of the breaker, the DSP controller detects the zero-crossing time of the voltage across or the current flowing the breaker, calculates the delay time according to the characteristic parameters of the breaker, and sends out a control instruction, the power electronic driving module receives the weak signal control instruction sent by the DSP, a secondary control loop of the power electronic is made by shaping and amplifying, thus to realize breaker synchronous control, improve the quality and reliability of a power system. The structure is simple, and the price is low.
Description
Technical field
The present invention relates to the breaker controller technical field in the power supply, particularly adopt modern power electronics technology to realize the breaker synchronous controller and the control method thereof of the Synchronization Control of mesohigh circuit breaker.
Background technology
Along with the raising of development and national economy and living standards of the people, society is increasing to the demand of electric power.And the announcement of electric power law and execution more require power supply department that safe, economic, reliable and high-quality electric power is provided.In power supply and distribution system, circuit breaker is crucial electric equipment, and it mainly contains two purposes: the one, and control action is promptly according to the needs input of operation of power networks or cut out a part of equipment or circuit; The 2nd, protective effect; promptly when force device or line failure; can be automatically selectively fault element and circuit excises from the system of operation rapidly and separate, avoid fault element to continue sustain damage, and guarantee that fault-free partly can recover normal rapidly.At present, nearly all circuit breaker all adopts manually or automated manner closes a floodgate and sub-switching operation, close the instantaneous of power equipment cut-offfing and close, the initial phase angle of system voltage of living in all be usually at random with uncertain, therefore can produce transient process in various degree.For example, when closing unloaded transformer, capacitor group and nonloaded line, usually produce very high the shoving and overvoltage of amplitude in the pass.Amplitude is very big shove will cause circuit breaker get an electric shock impaired, Transformer Winding produces mechanical stress and relay misoperation is done; Overvoltage may cause apparatus local discharge, and it is destroyed to insulate; These are not only unfavorable to the equipment in the system, also influence the stable operation of electric power system.In order to reduce transient process, the one, can adopt solid circuit breaker, promptly utilize contactless power electronic device of high speed such as thyristor, GTO and IGCT are as no arc electronic switch, also claim solid-state switch, substitute traditional mechanical switch, but it controls complicated, cost an arm and a leg, simultaneously because all there is loss certainly in switching device under switching process and conducting state, when particularly using as circuit breaker, the power loss in its turn on process equals the product of the tube voltage drop of the operating current of circuit and device on-state, is a sizable numerical value.Above-mentioned power loss not only causes the waste of energy, also can be converted into the rising that heat energy causes device temperature, have influence on the operate as normal and the reliability of device, therefore must adopt suitable means to cool off, this causes the increase of system complexity and the reduction of reliability again.Another kind of commonly used method be the dynamic and static contact of circuit breaker under the control of control system, finish the disconnection or the closure of circuit in the designated phase of line voltage or electric current, promptly circuit breaker is carried out Synchronization Control.So-called circuit breaker synchronous control technique is meant that the dynamic and static contact of circuit breaker closes at the appointment phase angle place of system voltage waveform and closes, and makes power equipments such as unloaded transformer, capacitor and nonloaded line drop into a kind of intelligent control technology of electric power system under the situation to self and system shock minimum.Synchronous control technique realizes that the switch main contact closes when closing with zero current disjunction to increase substantially the break-make characteristic of switch when no-voltage.Compare its structure of solid circuit breaker and control is simple, reliability is high, price is low.The synchronous pass of the utilization technology of closing can reduce overcurrent and the overvoltage in the closing operation transient process, thereby improves the life-span of power equipment and the stability of system's operation.Adopting synchronously, the pass technology of closing can reach following effect:
(1) reduces shoving and overvoltage of closing operation.
Shoving that amplitude is very big will cause breaker contact point impaired, and Transformer Winding produces mechanical stress, protection relay misoperation.Overvoltage may cause apparatus local discharge.Adopt the amplitude that synchroswitching can reduce to shove and the disturbance of voltage, consider, all preset switching-on resistance and lightning arrester is far better than used usually from aspects such as the effect of restriction transient voltage and economy.
(2) stability of the raising quality of power supply and system.
In energy market with keen competition day by day, the quality of power supply is becoming important performance index.The former transient process of thinking some minor variations of acceptable can be because the growth of the application of power electronics and rising to some extent, causes not wish the malfunction that occurs and cause production process to be stagnated and huge production loss.The transient process of switching manipulation can produce various interference to distribution system, and they comprise protection is late for moving and unacceptable overvoltage causes serious harm and the initial failure that the abominable quality of power supply causes.The local temporary overvoltage that produces of switch may propagate at a distance, influences other user concurrents sometimes and opens up different electric pressures.Close synchronously the technology of closing and to reduce overcurrent and the superpotential effect that grid equipment is born when closing operation is carried out in load, effectively improved the quality of power supply and improved the stability of system.
(3) prolong the useful life and the time between overhauls(TBO) of electrical equipment, reduced cost.
Close synchronously and close The Application of Technology bears other electrical equipment in circuit breaker and the electric power system in closing operation overcurrent and overvoltage and reduce greatly, thereby prolonged useful life and time between overhauls(TBO).Simultaneously, the realization of closing the technology of closing synchronously can replace traditional switching-on resistance, auxiliary equipment such as combined floodgate inductance and series reactor, and what increased is the lower-cost control system of a cover, thereby has reduced cost.
By structure, circuit breaker divides operating mechanism and Switch main body two parts, and at present, the mesohigh circuit breaker mainly adopts vacuum circuit-breaker, is extensive use of electromagnetic operating mechanism and spring operating mechanism.The critical component of spring operating mechanism is switching-in spring and tripping spring.It is stored in the mechanical power of motor in the switching-in spring at short notice, and the energy in the switching-in spring is discharged close a floodgate then, simultaneously, the tripping spring energy storage.The operating characteristic of spring operating mechanism is subjected to ectocine less, and the power supply capacity of requirement is little, and the AC and DC power supply is all available.Spring operating mechanism has overcome the shortcoming of electromagnetic operating mechanism to a certain extent, can either obtain higher closing speed, can realize the high speed automatic reclosing operation again.But shortcoming is: rely on machine driving fully, parts are many, and operate time is dispersed big.Permanent magnet mechanism is realized the maintenance function that dropout that the repertoire of conventional circuit breaker operating mechanism, its maximum characteristics are that it need not be traditional and locker can be realized mechanism's terminal location by the special combination with electromagnetic mechanism and permanent magnet.The permanent magnet mechanism action component is few, intermediate conversion and bindiny mechanism also seldom, this has reduced dispersiveness and the uncontrollability of operate time greatly.Experimental results show that when action time of delay during less than ± 1ms, the circuit breaker Synchronization Control has good effect, what present most of circuit breaker adopted is spring operating mechanism, test structure according to Fig. 2 shows, under certain condition, therefore spring operating mechanism dispersiveness operate time can be used for Synchronization Control less than 0.5ms, if permanent magnet mechanism adopts, better effect and performance will be arranged on a large scale.
With regard to the Synchronization Control aspect, Synchronization Control circuit breaker in the world began one's study in 1975, this technology is better than switching-on resistance, series reactor or lightning arrester, in recent years along with development of electronic technology, in the world the actuality of this technology is more given the attention of height.
Summary of the invention
The purpose of this invention is to provide a kind of synchroswitching or sub-switching operation that adopts the realization of modern power electronic control technology to conventional mesohigh circuit breaker, can reduce the transient process of loading and in the switching process, producing greatly, improve the power system power supply q﹠r, and have breaker synchronous controller simple in structure, that price is low.
Another object of the present invention provides a kind of control method of breaker synchronous controller.
The objective of the invention is to realize by following technical proposals.
According to breaker synchronous controller of the present invention, comprise voltage-current sensor, dsp controller, power electric power electronic module and driver module thereof, it is characterized in that by current transformer that is connected with circuit breaker and voltage transformer, the zero passage comparison circuit that is connected with voltage transformer of current transformer therewith, the DSP control circuit that is connected of zero passage comparison circuit therewith, the power electric power electronic module that is connected of DSP control circuit is formed therewith, and circuit breaker power electric power electronic module therewith is connected.
Described DSP control circuit comprises waveform shaping circuit and level-conversion circuit in parallel, the dsp chip that is connected with level-conversion circuit of Bing Lian waveform shaping circuit therewith, dsp chip EEPROM that be connected and that be used to store the circuit breaker characteristic parameter forms therewith, this waveform shaping circuit in parallel is connected with described zero passage comparison circuit respectively with level-conversion circuit, and dsp chip is connected with described power electric power electronic module.
Described zero passage comparison circuit mainly adopts two precision comparators, and wherein in-phase input end connects the voltage and current signal of collection, and inverting input passes through grounding through resistance.
Described dsp chip adopts the up-to-date TMS320LF2812 chip of TI company.
Series connection power power electronic device replaces conventional manual divide-shut brake in the secondary electric control system energy storage motor of conventional circuit breaker, closing coil, switching winding, adopt IGBT when controlling power supply for direct current, the control power supply adopts anti-parallel thyristor when being interchange, and IGBT two ends parallel connection buffer absorbs circuit.
A kind of control method that adopts described breaker synchronous controller is characterized in that comprising following control procedure:
1) current transformer is connected with controlled circuit breaker to detect and is flow through electric current, voltage transformer and controlled circuit breaker measurement in parallel both end voltage,
2) the detected both end voltage that flows through electric current and measure is input to the zero passage comparison circuit,
Output level generation saltus step when 3) having served as the voltage and current signal zero passage that the zero balancing circuit gathers, thus detect the electric current and voltage zero passage constantly, and whether according to this operate time of data prediction that is stored among the EEPROM, detecting has reclosing command,
4) square-wave signal that obtains of zero passage comparison circuit, be input in the DSP control circuit,, when catching pin generation saltus step, interrupt through being input to the pin of catching of DSP after level match, the shaping, the output triggering signal was to the power electric power electronic module after interrupt service routine postponed certain hour
5) dsp controller output is weak electric signal, directly driving electric electronic device IGBT or anti-parallel thyristor, amplify shaping rear drive IGBT anti-parallel thyristor through overdrive circuit, IGBT connects with closing coil and switching winding, when the IGBT triggering and conducting, can realize closing operation and sub-switching operation
6) after each action, according to DSP send control command constantly and the difference of electric current initial time write down this and move time of delay, and be stored among the EEPROM, before next time action, analyze front several times operate times earlier, adopt adaptive control algorithm to predict next operate time.
When carrying out closing operation, to single-phase capacitive load, close a floodgate when selecting voltage zero-cross, to single-phase inductive load, select the voltage peak place to close a floodgate, earth-free and delta connection mode inserts wherein two-phase in A, B phase voltage when identical to three-phase star, postpones to insert third phase behind the 5ms, to the three-phase star ground connection mode of connection, satisfy mutually at A under the situation of single-phase input and close a floodgate, close a floodgate behind the C phase retardation 3.3ms, B phase retardation 6.7ms closes a floodgate.
When carrying out sub-switching operation, 5-7ms DSP sends the separating brake instruction before current over-zero.
The dsp controller recording instruction sends constantly and the initial current moment, and calculates both time differences, judges that in view of the above circuit breaker moves time of delay.
The technical solution adopted for the present invention to solve the technical problems is: whole isochronous controller comprises voltage-current sensor, dsp controller, power electronic device and driver module thereof.Adopt the Modern DSP control technology, the power power electronic technology is referred in the circuit breaker Synchronization Control, at first the dsp controller zero passage checking the circuit breaker both end voltage or flow through circuit breaker current constantly, calculate time of delay according to breaker operating characteristic, send control command then, the power electronic driver module is accepted the weak signal control command that DSP sends, and connects the secondary control loop of circuit breaker, thereby realizes the circuit breaker Synchronization Control through certain shaping, amplification driving power electronics.
The invention has the beneficial effects as follows, adopt synchroswitching or the sub-switching operation of modern power electronic control technology realization to conventional mesohigh circuit breaker, can reduce the transient process of loading and in the switching process, producing greatly, improve the power system power supply q﹠r, and have characteristics simple in structure, that price is low.
Description of drawings
Fig. 1 is a breaker synchronous controller theory structure block diagram.
Fig. 2 is the dsp controller hardware structure diagram.
Fig. 3 circuit breaker simultaneous operation flow chart.
Fig. 4 adopts the present invention to carry out synchroswitching gained curve.
Embodiment
The invention will be further described below in conjunction with accompanying drawing.
As shown in Figure 1, according to breaker synchronous controller of the present invention, comprise voltage, current sensor, dsp controller 4, power electric power electronic module 5 and driver module thereof, it is characterized in that by current transformer 1 that is connected with circuit breaker 6 and voltage transformer 2, the zero passage comparison circuit 3 that is connected with voltage transformer 2 of current transformer 1 therewith, the dsp controller 4 that is connected of zero passage comparison circuit 3 therewith, the power electric power electronic module 5 and the driver module thereof that are connected of dsp controller 4 formed therewith, and circuit breaker 6 power electric power electronic module 5 therewith is connected.
As shown in Figure 2, described dsp controller 4 comprises waveform shaping circuit 9 and level-conversion circuit 10 in parallel, the dsp chip 11 that is connected with level-conversion circuit 10 of Bing Lian waveform shaping circuit 9 therewith, the EEPROM12 that dsp chip 11 is connected therewith is used to store the circuit breaker characteristic parameter forms, this waveform shaping circuit in parallel 9 and level-conversion circuit 10 respectively with being connected of described zero passage comparison circuit 3, dsp chip 11 is connected with described power electric power electronic module 5.
Described zero passage comparison circuit mainly adopts two precision comparators, and wherein in-phase input end connects the voltage and current signal of collection, and inverting input passes through grounding through resistance.
Described dsp chip adopts the up-to-date TMS320LF2812 chip of TI company.
Series connection power power electronic device replaces conventional manual divide-shut brake in the secondary electric control system energy storage motor of conventional circuit breaker, closing coil, switching winding, adopt IGBT when controlling power supply for direct current, the control power supply adopts anti-parallel thyristor when being interchange, and IGBT two ends parallel connection buffer absorbs circuit.
As shown in Figure 3, the control method of breaker synchronous controller of the present invention is characterized in that comprising following control procedure:
1) current transformer is connected with controlled circuit breaker to detect and is flow through electric current, voltage transformer and controlled circuit breaker measurement in parallel both end voltage,
2) the detected both end voltage that flows through electric current and measure is input to the zero passage comparison circuit,
Output level generation saltus step when 3) having served as the voltage and current signal zero passage that the zero balancing circuit gathers, thus detect the electric current and voltage zero passage constantly, and whether according to this operate time of data prediction that is stored among the EEPROM, detecting has reclosing command,
4) square-wave signal that obtains of zero passage comparison circuit, be input in the DSP control circuit,, when catching pin generation saltus step, interrupt through being input to the pin of catching of DSP after level match, the shaping, the output triggering signal was to the power electric power electronic module after interrupt service routine postponed certain hour
5) dsp controller output is weak electric signal, directly driving electric electronic device IGBT or anti-parallel thyristor, amplify shaping rear drive IGBT anti-parallel thyristor through overdrive circuit, IGBT connects with closing coil and switching winding, when the IGBT triggering and conducting, can realize closing operation and sub-switching operation
6) after each action, according to DSP send control command constantly and the difference of electric current initial time write down this and move time of delay, and be stored among the EEPROM, before next time action, analyze front several times operate times earlier, adopt adaptive control algorithm to predict next operate time.
When carrying out closing operation, to single-phase capacitive load, close a floodgate when selecting voltage zero-cross, to single-phase inductive load, select the voltage peak place to close a floodgate, earth-free and delta connection mode inserts wherein two-phase in A, B phase voltage when identical to three-phase star, postpones to insert third phase behind the 5ms, to the three-phase star ground connection mode of connection, satisfy mutually at A under the situation of single-phase input and close a floodgate, close a floodgate behind the C phase retardation 3.3ms, B phase retardation 6.7ms closes a floodgate.
When carrying out sub-switching operation, 5-7ms DSP sends the separating brake instruction before current over-zero.
The dsp controller recording instruction sends constantly and the initial current moment, and calculates both time differences, judges that in view of the above circuit breaker moves time of delay.
Fig. 4 shows and adopts the present invention to carry out synchroswitching gained curve.
The technical solution adopted in the present invention is: whole isochronous controller comprises voltage-current sensor, dsp controller, power electronic device and driver module thereof.Adopt the Modern DSP control technology, the power power electronic technology is referred in the circuit breaker Synchronization Control, at first the dsp controller zero passage checking the circuit breaker both end voltage or flow through circuit breaker current constantly, calculate time of delay according to breaker operating characteristic, send control command then, the power electronic driver module is accepted the weak signal control command that DSP sends, and connects the secondary control loop of circuit breaker, thereby realizes the circuit breaker Synchronization Control through certain shaping, amplification driving power electronics.
The invention has the beneficial effects as follows, adopt the modern power electronic control technology to realize high in the routine The synchroswitching of voltage breaker or sub-switching operation, can greatly to reduce load produces in the switching process Transient process improves the power system power supply q﹠r, and have simple in structure, price is low Characteristics.
Claims (4)
1, a kind of control method of breaker synchronous controller is characterized in that comprising following control procedure:
1) current transformer is connected with controlled circuit breaker to detect and is flow through electric current, voltage transformer and controlled circuit breaker measurement in parallel both end voltage,
2) detected electric current and the both end voltage that measures of flowing through is input to the zero passage comparison circuit and carried out zero balancing,
When 3) having served as voltage that the zero balancing circuit gathers, current signal zero passage, output level generation saltus step, thus detect the electric current and voltage zero passage constantly, whether according to this operate time of data prediction that is stored among the EEPROM, detecting has reclosing command,
4) square-wave signal that obtains of zero passage comparison circuit, be input in the DSP control circuit,, when catching pin generation saltus step, interrupt through being input to the pin of catching of DSP after level match, the shaping, the output triggering signal was to the power electric power electronic module after interrupt service routine postponed certain hour
5) dsp controller output is weak electric signal, amplifies shaping rear drive IGBT anti-parallel thyristor through overdrive circuit, and IGBT connects with closing coil and switching winding, when the IGBT triggering and conducting, can realize closing operation and sub-switching operation,
6) after each action, according to DSP send control command constantly and the difference of electric current initial time write down this and move time of delay, and be stored among the EEPROM, before next time action, analyze front several times operate times earlier, adopt adaptive control algorithm to predict next operate time.
2, the control method of breaker synchronous controller according to claim 1, when it is characterized in that carrying out closing operation, to single-phase capacitive load, close a floodgate when selecting voltage zero-cross, to single-phase inductive load, select the voltage peak place to close a floodgate, earth-free and the delta connection mode to three-phase star, insert wherein two-phase when identical in A, B phase voltage, postpone to insert third phase behind the 5ms,, satisfy mutually at A under the situation of single-phase input and close a floodgate the three-phase star ground connection mode of connection, close a floodgate behind the C phase retardation 3.3ms, B phase retardation 6.7ms closes a floodgate.
3, the control method of breaker synchronous controller according to claim 1, when it is characterized in that carrying out sub-switching operation, 5-7ms DSP sends the separating brake instruction before current over-zero.
4, the control method of breaker synchronous controller according to claim 1 is characterized in that the dsp controller recording instruction sends constantly and the initial current moment, and calculates both time differences, judges that in view of the above circuit breaker moves time of delay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN200810010709A CN100580835C (en) | 2008-03-21 | 2008-03-21 | Breaker synchronous controller and control method thereof |
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| CN200810010709A CN100580835C (en) | 2008-03-21 | 2008-03-21 | Breaker synchronous controller and control method thereof |
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| CN101246785A CN101246785A (en) | 2008-08-20 |
| CN100580835C true CN100580835C (en) | 2010-01-13 |
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| CN200810010709A Expired - Fee Related CN100580835C (en) | 2008-03-21 | 2008-03-21 | Breaker synchronous controller and control method thereof |
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Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101615017B (en) * | 2009-07-24 | 2012-05-23 | 河北理工大学 | Method for synchronously regulating and controlling high-pressure circuit breaker based on programmable controller |
| CN102520628B (en) * | 2012-01-10 | 2015-04-29 | 武汉长海电气科技开发有限公司 | Synchronous switch control device |
| CN103000409B (en) * | 2012-11-30 | 2015-02-25 | 西安交通大学 | Low frequency breaker with phase-selection brake-separating function |
| CN103311938B (en) * | 2013-06-25 | 2015-03-25 | 浙江清电科技有限公司 | Control method for synchronous casting and cutting of three-phase capacitive load in three-phase circuit |
| CN103427487B (en) * | 2013-07-22 | 2016-04-06 | 国家电网公司 | Control circuit of high-voltage circuit breaker |
| CN103489702B (en) * | 2013-09-05 | 2015-09-09 | 瑞亿智能控制设备（深圳）有限公司 | The circuit breaker open/closure controller detected based on optoelectronic position and control method thereof |
| CN103779965B (en) * | 2014-01-13 | 2015-06-17 | 江苏现代电力科技股份有限公司 | Integrated high-voltage AC circuit-breaker controller |
| CN104977528A (en) * | 2014-04-11 | 2015-10-14 | 华北电力大学 | Magnetic latching relay actuation time and reset time detection device |
| CN105023489B (en) * | 2015-08-18 | 2017-11-24 | 重庆电力高等专科学校 | Power circuit Controlling model for electric power teaching |
| CN105977930A (en) * | 2016-06-07 | 2016-09-28 | 国家电网公司 | User special transformer high-voltage switch controller based on IGBT |
| CN106486965A (en) * | 2016-11-03 | 2017-03-08 | 中国电力科学研究院 | A kind of dc circuit breaker of self-excited oscillation type and its control method |
| CN110091761A (en) * | 2018-01-31 | 2019-08-06 | 株洲中车时代电气股份有限公司 | Electronic switch phase change control method and device, method for controlling passing neutral section and device |
| CN111900007B (en) * | 2020-07-29 | 2022-08-23 | 浙江方圆电气设备检测有限公司 | Method for accurately controlling phase selection closing angle |
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2008
- 2008-03-21 CN CN200810010709A patent/CN100580835C/en not_active Expired - Fee Related
Non-Patent Citations (2)
| Title |
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| 基于DSP和人工神经网络的智能同步断路器研究. 幸晋渝等.电力自动化设备，第25卷第1期. 2005 |
| 基于DSP和人工神经网络的智能同步断路器研究. 幸晋渝等.电力自动化设备，第25卷第1期. 2005 * |
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