CN103681087A - Intelligent branching and demarcating vacuum circuit breaker complete device and protection method thereof - Google Patents
Intelligent branching and demarcating vacuum circuit breaker complete device and protection method thereof Download PDFInfo
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Abstract
The invention relates to an intelligent branching and demarcating vacuum circuit breaker complete device and a protection method thereof. The intelligent branching and demarcating vacuum circuit breaker complete device comprises a circuit breaker main body and a split controller arranged outside and connected with the circuit breaker main body through a cable device; the controller detects the two-phase current, zero sequence current and/or line voltage of the circuit breaker main body and controls the electric energy storage and electric switching on/off of the circuit breaker main body. Through the adoption of the intelligent branching and demarcating vacuum circuit breaker complete device, when users use functions such as inquiring, parameter setting and brake opening/closing, the users can complete the operation on the ground without climbing onto telegraph poles; meanwhile, according to the invention, GPRS (General Packet Radio Service) remote network control can be realized by using an SIM (Subscriber Identity Module), and thus the user can perform remote control without appearing on the scene.
Description
Technical field
The present invention relates to the safe connection device of a kind of outdoor grid, especially a kind of intelligent branch demarcation vacuum circuit breaker the complete sets of equipment and guard method thereof.
Background technology
Along with the proposition of intelligent grid plan, the year two thousand twenty builds up the target that " strong intelligent grid " becomes China's electric power system power grid construction.The proposition of intelligent grid, needs extensive use advanced person's equipment and technology, greatly improves the performance of electrical power trans mission/distribution system.Realizing distribution network automated is a key of intelligent grid.For improving and guarantee the fail safe of supply line, reliability, and circuit is carried out to monitoring in real time, the distribution protection equipment of intelligence plays a part very important.
China's 10KV line construction is various, and security reliability is poor, Frequent Accidents, and accident is searched difficulty, and fault of branch line has seriously affected power distribution network safe operation.According to relevant statistics, the failure rate of overhead transmission line accounts for 70% left and right of backbone fault ratio to root.How to isolate fast sole user's fault, and do not cause backbone whole piece circuit power outage to occur, and realize the important topic that monitoring in real time becomes current distribution network system.Solve at present because of sole user's accident and protect mismate to involve the method that whole piece feeder line has a power failure, related art scheme mainly contains Chinese patent ZL200820051909.X < < user demarcation circuit breaker complete set of equipments > >.Its deficiency is: (1) maintenance difficult, and the personnel of needing repairing climb to corresponding position and detect maintenance; (2) measurement and control unit can not be realized both-way communication, has certain limitation, and as wish realizes this target, need input larger on the basis of this patent for realization monitoring in real time and quick isolated fault, is unfavorable for extensive use; (3) only have quick-break, overcurrent two segment protects, single shot reclosing can only be set, be unfavorable for according to circuit situation parameters and corresponding function; (4) on device, do not establish display unit, can not check easily line fault.
Summary of the invention
The technical problem to be solved in the present invention is: propose a kind of fault current detection function that has, function and communication function are controlled in protection, are applicable to intelligent branch demarcation vacuum circuit breaker the complete sets of equipment and the guard method thereof of 10kv overhead transmission line.
The technical solution adopted in the present invention is: a kind of intelligent branch demarcation vacuum circuit breaker the complete sets of equipment, the split type controller that comprises breaker body and be arranged on breaker body outside, be connected by cable unit with breaker body; Described controller detects biphase current, zero-sequence current and/or the line voltage distribution of breaker body, and controls electric energy-stored, electric switch-on and the electronic separating brake of breaker body.
Breaker body of the present invention has shell, is provided with vacuum interrupter and voltage transformer in described shell, and described vacuum interrupter is connected with zero sequence current mutual inductor; Outer casing bottom has mounting seat, and a side of base is provided with earth terminal; Described case surface is provided with bearer bar; The input of breaker body is connected with service-wire mains side, and the output of breaker body is connected with the input of customer charge side distribution network; The bottom of described breaker body has aviation socket.
Controller of the present invention has circular enclosure shell, and the bottom of described circular case is provided with five core supply sockets, five core current sockets, eight core signal plugs, operation knob and handle, alarm indicator, function setting window and earth stud; Five described core supply sockets, five core current sockets, eight core signal plugs, alarm indicator and function setting window are electrically connected to the inner control module arranging of controller.
The below of the bottom of controller of the present invention, function setting window is provided with definite value table is set; In described function setting window, there is LCDs, option tab and SIM card draw-in groove; Install after SIM card networking, can set up and control network by GPRS, realized control operation.
The bottom of breaker body of the present invention has aviation socket, and one end of described cable unit is connected with aviation socket; The other end of cable unit has two plugs, and two described plugs are connected with eight core signal plugs with the five core current sockets that arrange on controller respectively.
Controller of the present invention and breaker body are used in conjunction with biphase current, zero-sequence current and line voltage distribution that can detection line, above-mentioned analog signals is exported by the aviation socket of breaker body, from five core current sockets and the eight core signal plugs of controller bottom, pass through cable unit access controller, by signal conversion and the calculating of controller inside, its runtime value of Real-Time Monitoring.
The present invention also provides the guard method of a kind of intelligent branch demarcation vacuum circuit breaker the complete sets of equipment, comprises phase fault protection and one-phase ground protection;
Described phase fault protection: the generation that the AC phase current that controller is drawn from the inner CT of intelligent branch demarcation vacuum circuit breaker by detection and definite value are relatively judged fault, while there is over current fault in branch line user and line end user circle, intelligence branch demarcation vacuum circuit breaker controller detects overcurrent, after time delay is judged, the order of controller output separating brake makes demarcation vacuum circuit breaker automatic brake separating, automatically excises over current fault;
Described one-phase ground protection: relatively distinguish and judge single phase ground fault in user circle and out-of-bounds by detecting the zero sequence current signal draw from the built-in zero sequence CT of demarcation vacuum circuit breaker of intelligent branch and definite value; for user's single phase ground fault out-of-bounds; the zero-sequence current detecting when there is single phase ground fault in user circle due to the zero-sequence current detecting from zero sequence CT; therefore; by fixed value adjusting, can make judgement exactly.
In phase fault protection of the present invention, after controller protection action, intelligent branch demarcation vacuum circuit breaker is carried out to reclosing, reclosing number of times mostly is 3 times most.
The invention has the beneficial effects as follows: adopt and the invention enables user using inquiry, parameters, during the functions such as divide-shut brake, without climbing on electric pole, operate, on ground, can complete; Meanwhile, the present invention can also utilize SIM to realize the remote network control of GPRS, makes user just can realize remote control at the scene.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the schematic diagram of installing and using of the present invention;
Fig. 2 is breaker body structural representation of the present invention;
Fig. 3 is controller architecture schematic diagram of the present invention;
In figure: 1, breaker body; 2, controller; 3, cable unit; 11, shell; 12, vacuum interrupter; 13, voltage transformer; 14, zero sequence current mutual inductor; 15, mounting seat; 16, earth terminal; 17, bearer bar; 18, aviation socket; 21, circular case; 22, five core supply sockets; 23, five core current sockets; 24, eight core signal plugs; 25, operation knob and handle; 26, alarm indicator; 27, function setting window; 28, definite value arranges table; 29, LCDs; 40, option tab; 41, SIM card draw-in groove.
Embodiment
The present invention is further detailed explanation with preferred embodiment by reference to the accompanying drawings now.These accompanying drawings are the schematic diagram of simplification, basic structure of the present invention is only described in a schematic way, so it only show the formation relevant with the present invention.
A kind of intelligent branch demarcation vacuum circuit breaker the complete sets of equipment as shown in Figure 1, the split type controller 2 that comprises breaker body 1 and be arranged on breaker body outside, be connected by cable unit 3 with breaker body; Controller 2 detects biphase current, zero-sequence current and/or the line voltage distribution of breaker bodies 1, and controls electric energy-stored, electric switch-on and the electronic separating brake of breaker body.
As shown in Figure 2, breaker body has shell 11, is provided with vacuum interrupter 12 and voltage transformer 13 in described shell 11, and described vacuum interrupter 12 is connected with zero sequence current mutual inductor 14; Shell 11 bottoms have mounting seat 15, and a side of base 15 is provided with earth terminal 16; Described shell 11 surfaces are provided with bearer bar 17; The input of breaker body is connected with service-wire mains side, and the output of breaker body is connected with the input of customer charge side distribution network; The bottom of described breaker body has aviation socket 18.
As shown in Figure 3, controller has circular enclosure shell 21, and the bottom of described circular case is provided with five core supply sockets 22, five core current sockets 23, eight core signal plugs 24, operation knob and handle 25, alarm indicator 26, function setting window 27 and earth stud; Five described core supply sockets, five core current sockets, eight core signal plugs, alarm indicator and function setting window are electrically connected to the inner control module arranging of controller.
The below of the bottom of controller of the present invention, function setting window is provided with definite value table 28 is set; In described function setting window, there is LCDs 29, option tab 40 and SIM card draw-in groove 41; Install after SIM card networking, can set up and control network by GPRS, realized control operation.
The electric operating of controller comprises electric energy-stored operation, electric switch-on and electronic separating brake;
Electric energy-stored operation: controller on-delay 10 seconds, automatically detect breaker energy storage signal, detect intelligent branch demarcation vacuum circuit breaker not energy storage automatically send electric energy-stored order, intelligent branch demarcation vacuum circuit breaker receives after energy storage order, automatically completes electric energy-stored;
Electric switch-on: the black operation knob on dextrorotation controller is located to hand " dynamic circuit connector/reset ", controller output switching signal, circuit breaker automatic closing;
Electronic separating brake: the black operation knob on left-handed controller was located to " manually dividing ", controller output sub-gate signal, switch automatic brake separating.
Operation principle of the present invention is: the fault of 10kV feeder line or equipment mainly contains two types of phase fault and single-phase earthings, and controller is processed respectively these two kinds of faults;
The troubleshooting of phase fault: for the phase fault in user circle, the generation that the AC phase current that controller is drawn from the inner CT of intelligent branch demarcation vacuum circuit breaker by detection and definite value are relatively judged fault, while there is over current fault in branch line user and line end user circle, controller detects overcurrent, after time delay is judged, the order of controller output separating brake makes demarcation vacuum circuit breaker automatic brake separating, automatically excise over current fault, other user on transformer station and feeder line avoids occurring power outage, for fear of transient fault, cause user to have a power failure for a long time, after controller protection action, intelligent branch demarcation vacuum circuit breaker is carried out to reclosing, reclosing number of times, time can be set, maximum 3 times of reclosing number of times, for fear of permanent fault, circuit is caused badly damaged, or the time coordinations problem of other protection, controller has been done post reclosing acceleration defencive function.
The troubleshooting of single-phase earthing: the neutral grounding mode at China 10kV power distribution network can be divided into: isolated neutral, neutral by arc extinction coil grounding and three kinds of modes of Neutral Point Through Low Resistance.Controller is relatively distinguish and judge single phase ground fault in user circle and out-of-bounds by detecting the zero sequence current signal draw from the built-in zero sequence CT of demarcation vacuum circuit breaker of intelligent branch and definite value to the basic handling method of single phase ground fault, for with sound single phase ground fault out-of-bounds, the zero-sequence current detecting when there is single phase ground fault in user circle due to the zero-sequence current detecting from zero sequence CT, therefore, by suitable fixed value adjusting, can make judgement exactly.
Controller is applicable to above-mentioned three kinds of neutral grounding modes, and its action principle is described below:
A, isolated neutral mode
When earth fault occurs in intelligent branch demarcation vacuum circuit breaker load side, the zero-sequence current detecting is:
I
01＝3ωＵ
0C
1
U wherein
0for power supply phase voltage, ω is frequency.
When earth fault occurs in intelligent branch demarcation vacuum circuit breaker mains side, the zero-sequence current detecting is:
I
02＝3ωＵ
0C
2
U wherein
0for power supply phase voltage, ω is frequency.
In general, C1 is much larger than C2, so I
02than I
01, the zero-sequence current that earth fault detects out-of-bounds time user is very little, and the zero-sequence current that earth fault detects in user circle time is very large, by suitable definite value, sets, and controller can be judged earth fault in boundary accurately.
B, neutral by arc extinction coil grounding mode and c, Neutral Point Through Low Resistance mode do not elaborate herein.
The basic function of controller has several:
1. manual deciliter function of Switch main body
As general circuit breaker, intelligent branch demarcation vacuum circuit breaker possesses on-site manual deciliter and electronic deciliter and controls function.
2. analog quantity measuring ability
Controller and Switch main body are used in conjunction with biphase current, zero-sequence current and line voltage distribution that can detection line, and above-mentioned analog signals is exported by Switch main body aviation socket, from the CT/IO socket of controller bottom by aviation plug access controller.Signal conversion by controller inside and calculating, can its runtime value of Real-Time Monitoring (after the maintain communications mouth with notebook computer by controller or configuration communication module, can receive and process these and measure numerical value).
3. function is controlled in protection
A) zero-sequenceprotection
By to the fixed value adjusting of controller and the monitoring to zero-sequence current, the single phase ground fault in user circle be detected and be judged to the intelligent branch true residence circuit breaker of demarcating can, after time delay reaches a definite value, carries out sub-switching operation, automatically excises earth fault; Other user on transformer station and feeder line avoids occurring power outage; for fear of transient fault, cause switch separating brake; can carry out reclosing setting to intelligent branch demarcation vacuum circuit breaker. reclosing number of times, time can be set voluntarily; maximum 3 times of reclosing number of times; for fear of permanent fault, circuit is caused badly damaged; or the time coordinations problem of other protection, intelligent branch demarcation vacuum circuit breaker has been done post reclosing acceleration defencive function.The control function of zero-sequenceprotection is applicable to power network neutral point isolated neutral system, neutral by arc extinction coil grounding system and Neutral Point Through Low Resistance system.
B) overcurrent protection
1, while being set to intelligent branch demarcation vacuum circuit breaker function, by definite value, connect monitoring fixed and to phase current, the phase fault in user circle can be detected and judge to intelligence branch demarcation vacuum circuit breaker, after time delay is judged, the order of controller output separating brake makes demarcation vacuum circuit breaker automatic brake separating, automatically excise over current fault, other user on transformer station and feeder line avoids occurring power outage, for fear of transient fault, cause user to have a power failure for a long time, after controller protection action, intelligent branch demarcation vacuum circuit breaker is carried out to reclosing, reclosing number of times, time can be set, maximum 3 times of reclosing number of times, for fear of permanent fault, circuit is caused badly damaged, or the time coordinations problem of other protection, controller has been done post reclosing acceleration defencive function,
While 2, being set to demarcation load switch function, by fixed value adjusting and the monitoring to phase current, the phase fault in user circle can be detected and judge to demarcation switch, remembering this malfunction and detecting after transformer station's outlet breaking, after time delay, carry out sub-switching operation, the short trouble in user-isolated boundary effectively before transformer station overlaps.
Separating brake under circuit power failure state and protection alarm function
Controller is when [automatically] running status, as user out-of-bounds occurs after phase fault, can cause transformer station's outlet switch breaking, controller is without input power, after whole device dead electricity, controller maintains it by storage capacitor and normally works, and can carry out during this period separating brake output (DC2200V) and make switch reliably divide and explain.No matter be that single phase ground fault or phase fault cause and can only branch's demarcation vacuum circuit breaker protection move, the ALARM alarm indicator of controller is all normal bright or glittering, in prompting user circle, single-phase earthing or phase fault has occurred.
5. self-checking function
Controller timer-controlled self-inspection (automatically being carried out by program control) when normal operation, the object of self check comprises definite value district, output loop, sampling channel, E
2pROM etc., when self check is abnormal, light self-checking alarming indicator light, and locking closing loop.
The all operations of controller, all in the bottom of its circular case, is established TV output loop protection fusion tube in COM, when controller internal circuit breaks down, built-in TV is unaffected for protection switch body.IO socket connects the measurement cable attracting from switch-side, and IO socket connects the control cables attracting from switch-side.ALARM is protection action light-emitting diode index signal; Definite value is set window and by a sealing tegillum, is closed when equipment normally moves, and opens this little small cup when needs carry out fixed value modification or check that state is made in control, operates accordingly.
A) when measuring cable, be connected with control cables correctly, and Switch main body is when closing position, the operating grip of controller is in [automatically] position, intelligent branch demarcation vacuum circuit breaker is in automatic monitoring running status, once now in user circle, line fault occurs, intelligent branch demarcation vacuum circuit breaker can complete its function of excision fault automatically.
B) the control operation handle that rotates counterclockwise controller, to [dividing] position, can make switch automatic brake separating.
C) after intelligent branch demarcation vacuum circuit breaker protection action; ALARM stand by lamp is bright, clockwise rotates the control operation handle of controller to [reset] position, can remove ALARM alarm status; if do not taked hand-reset operation, ALARM alarm status automatically terminated after 48 hours.
D) the intelligent branch of electric quantity test function [electric weight test button] demarcation vacuum circuit breaker needs the electric weight of self to process when handling failure, whether how many decision systems of electric weight can handle failure condition well, so being very important " electric quantity test " two buttons, depresses electric quantity test simultaneously, normal operation in running indicator 4 seconds, now electric capacity electric weight is qualified.
E) subsidiary communications function [RS-232/RS-485 interface] is mainly used and the maintenance of communicating by letter, and setting parameter etc. must be by the notebook computer setting of modifying for maintain communications mouth.
Controller is indicated various operating states by light-emitting diode.
" RUN " indicator light, glittering this indicator light during controller operation, it has internal electric source measuring ability, one second interval time.
" fault " indicator light, lights this indicator light during controller self check fault;
" overcurrent " indicator light, lights during phase current overdetermination value, during lower than definite value, extinguishes;
" ground connection ' ' indicator light, during earth current overdetermination value, light, during lower than definite value, extinguish;
" minute position " indicator light, controlled switch, when separating brake, is lighted this indicator light.
Controller of the present invention as required, can increase and join communication module, SIM card is installed and networks, and wireless handheld terminal can show and all parameters of Configuration Control Unit like this, and liquid crystal panel and the handheld terminal of the device of retentive control simultaneously keep simultaneous display.
Just the specific embodiment of the present invention of describing in above specification, various not illustrating is construed as limiting flesh and blood of the present invention, person of an ordinary skill in the technical field read after specification can to before described embodiment make an amendment or be out of shape, and do not deviate from essence of an invention and scope.
Claims (8)
1. intelligent branch demarcation vacuum circuit breaker the complete sets of equipment, is characterized in that: the split type controller that comprises breaker body and be arranged on breaker body outside, be connected by cable unit with breaker body; Described controller detects biphase current, zero-sequence current and/or the line voltage distribution of breaker body, and controls electric energy-stored, electric switch-on and the electronic separating brake of breaker body.
2. intelligent branch as claimed in claim 1 demarcation vacuum circuit breaker the complete sets of equipment, it is characterized in that: described breaker body has shell, in described shell, be provided with vacuum interrupter and voltage transformer, described vacuum interrupter is connected with zero sequence current mutual inductor; Outer casing bottom has mounting seat, and a side of base is provided with earth terminal; Described case surface is provided with bearer bar; The input of breaker body is connected with service-wire mains side, and the output of breaker body is connected with the input of customer charge side distribution network; The bottom of described breaker body has aviation socket.
3. intelligent branch as claimed in claim 1 demarcation vacuum circuit breaker the complete sets of equipment, it is characterized in that: described controller has circular enclosure shell, the bottom of described circular case is provided with five core supply sockets, five core current sockets, eight core signal plugs, operation knob and handle, alarm indicator, function setting window and earth stud; Five described core supply sockets, five core current sockets, eight core signal plugs, alarm indicator and function setting window are electrically connected to the inner control module arranging of controller.
4. intelligent branch as claimed in claim 3 demarcation vacuum circuit breaker the complete sets of equipment, is characterized in that: the below of the bottom of described controller, function setting window is provided with definite value table is set; In described function setting window, there is LCDs, option tab and SIM card draw-in groove.
5. intelligent branch as claimed in claim 1 demarcation vacuum circuit breaker the complete sets of equipment, is characterized in that: the bottom of described breaker body has aviation socket, and one end of described cable unit is connected with aviation socket; The other end of cable unit has two plugs, and two described plugs are connected with eight core signal plugs with the five core current sockets that arrange on controller respectively.
6. intelligent branch as claimed in claim 5 demarcation vacuum circuit breaker the complete sets of equipment, it is characterized in that: described controller and breaker body are used in conjunction with biphase current, zero-sequence current and line voltage distribution that can detection line, above-mentioned analog signals is exported by the aviation socket of breaker body, from five core current sockets and the eight core signal plugs of controller bottom, pass through cable unit access controller, by signal conversion and the calculating of controller inside, its runtime value of Real-Time Monitoring.
7. a guard method for intelligent branch demarcation vacuum circuit breaker the complete sets of equipment, is characterized in that: comprise phase fault protection and one-phase ground protection;
Described phase fault protection: the generation that the AC phase current that controller is drawn from the inner CT of intelligent branch demarcation vacuum circuit breaker by detection and definite value are relatively judged fault, while there is over current fault in branch line user and line end user circle, intelligence branch demarcation vacuum circuit breaker controller detects overcurrent, after time delay is judged, the order of controller output separating brake makes demarcation vacuum circuit breaker automatic brake separating, automatically excises over current fault;
Described one-phase ground protection: relatively distinguish and judge single phase ground fault in user circle and out-of-bounds by detecting the zero sequence current signal draw from the built-in zero sequence CT of demarcation vacuum circuit breaker of intelligent branch and definite value; for user's single phase ground fault out-of-bounds; the zero-sequence current detecting when there is single phase ground fault in user circle due to the zero-sequence current detecting from zero sequence CT; therefore; by fixed value adjusting, can make judgement exactly.
8. the guard method of intelligent branch as claimed in claim 7 demarcation vacuum circuit breaker the complete sets of equipment; it is characterized in that: in described phase fault protection; after controller protection action, intelligent branch demarcation vacuum circuit breaker is carried out to reclosing, reclosing number of times mostly is 3 times most.
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| CN201210331481.5A CN103681087B (en) | 2012-09-08 | 2012-09-08 | Intelligence branch's demarcation vacuum circuit breaker the complete sets of equipment and guard method thereof |
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| CN112327102A (en) * | 2020-11-02 | 2021-02-05 | 国网山东省电力公司威海供电公司 | Outdoor circuit breaking maintenance device for intelligent power distribution network |
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