CN103681087B - Intelligence branch's demarcation vacuum circuit breaker the complete sets of equipment and guard method thereof - Google Patents

Intelligence branch's demarcation vacuum circuit breaker the complete sets of equipment and guard method thereof Download PDF

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Publication number
CN103681087B
CN103681087B CN201210331481.5A CN201210331481A CN103681087B CN 103681087 B CN103681087 B CN 103681087B CN 201210331481 A CN201210331481 A CN 201210331481A CN 103681087 B CN103681087 B CN 103681087B
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China
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controller
circuit breaker
vacuum circuit
breaker body
current
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Expired - Fee Related
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CN201210331481.5A
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CN103681087A (en
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张伟钢
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Jiangsu Changyao Electrical Science & Technology Group Co Ltd
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Jiangsu Changyao Electrical Science & Technology Group Co Ltd
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Abstract

The present invention relates to a kind of intelligent branch demarcation vacuum circuit breaker the complete sets of equipment and guard method thereof, the split type controller comprising breaker body and be arranged on breaker body outside, be connected by cable unit with breaker body; Described controller detects the biphase current of breaker body, zero-sequence current and/or line voltage distribution, and controls electric energy-stored, the electric switch-on of breaker body and electronic separating brake.Employing the invention enables user at use inquiry, parameters, during the functions such as divide-shut brake, operating, can complete on ground without the need to climbing on electric pole; 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.

Description

Intelligence branch's demarcation vacuum circuit breaker the complete sets of equipment and guard method thereof
Technical field
The present invention relates to a kind of outdoor grid secure connection equipment, 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 the equipment and technology of extensive use advanced person, greatly improves the performance of electrical power trans mission/distribution system.Realizing distribution network automated is a key of intelligent grid.For improving and ensureing the fail safe of supply line, reliability, and carry out monitoring in real time to circuit, 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 searches difficulty, and fault of branch line seriously have impact on power distribution network safe operation.According to relevant statistics, the failure rate of overhead transmission line accounts for about 70% of backbone defective proportion to root.How to isolate the fault of sole user fast, and do not cause backbone whole piece circuit power outage to occur, and realize monitoring the important topic becoming current distribution network system in real time.Current solution is because of sole user's accident and the improper method involving whole piece feeder line and have a power failure of protection cooperation, and 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 carry out Measuring error; (2) measurement and control unit can not realize both-way communication, has certain limitation, and as needed input larger for realizing this target on the basis of this patent, be unfavorable for extensive use for realization monitoring in real time and quick isolated fault; (3) only have quick-break, overcurrent two segment protect, can only single shot reclosing be set, be unfavorable for according to line condition parameters and corresponding function; (4) device does not establish display unit, line fault can not be checked easily.
Summary of the invention
The technical problem to be solved in the present invention is: propose one and have fault current detection function, protecting control function and communication function, be 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 comprising breaker body and be arranged on breaker body outside, be connected by cable unit with breaker body; Described controller detects the biphase current of breaker body, zero-sequence current and/or line voltage distribution, and controls electric energy-stored, the electric switch-on of breaker body and electronic separating brake.
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 the 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; The control module that five described core supply sockets, five core current sockets, eight core signal plugs, alarm indicator and function setting window are arranged with controller inside is electrically connected.
The bottom of controller of the present invention, the below of function setting window are provided with definite value and arrange table; There is in described function setting window LCDs, option tab and SIM card draw-in groove; After SIM card networking is installed, net control can be set up by GPRS, realize 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 controller is arranged respectively.
Controller of the present invention and breaker body are with the use of can the biphase current of detection line, zero-sequence current and line voltage distribution, above-mentioned analog signals is exported by the aviation socket of breaker body, cable unit access controller is passed through from five core current sockets bottom controller and eight core signal plugs, by signal conversion and the calculating of controller inside, its runtime value of Real-Time Monitoring.
Present invention also offers the guard method of a kind of intelligent branch demarcation vacuum circuit breaker the complete sets of equipment, comprise phase fault protection and one-phase ground protection;
Described phase fault protection: controller compares by detecting the AC phase current of drawing from the inner CT of intelligent branch demarcation vacuum circuit breaker the generation judging fault with definite value, when 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 judges, controller exports separating brake order and makes demarcation vacuum circuit breaker automatic brake separating, automatically excises over current fault;
Described one-phase ground protection: compare the single phase ground fault distinguished and judge in user circle and out-of-bounds with definite value by detecting the zero sequence current signal of drawing from the built-in zero sequence CT of intelligent branch demarcation vacuum circuit breaker; for user's single phase ground fault out-of-bounds; due to the zero-sequence current detected when single phase ground fault occurs the zero-sequence current detected from zero sequence CT in user circle; therefore; by fixed value adjusting, can make and judging exactly.
In phase fault protection of the present invention, after controller protection act, carry out reclosing to intelligent branch demarcation vacuum circuit breaker, reclosing number of times mostly is 3 times most.
The invention has the beneficial effects as follows: adopt and the invention enables user at use inquiry, parameters, during the functions such as divide-shut brake, operating without the need to climbing on electric pole, can complete on ground; 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 of the present inventionly installs and uses schematic diagram;
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, only basic structure of the present invention are described in a schematic way, and therefore it only shows the formation relevant with the present invention.
One intelligence branch demarcation vacuum circuit breaker the complete sets of equipment as shown in Figure 1, the split type controller 2 comprising breaker body 1 and be arranged on breaker body outside, be connected by cable unit 3 with breaker body; Controller 2 detects the biphase current of breaker body 1, zero-sequence current and/or line voltage distribution, and controls electric energy-stored, the electric switch-on of breaker body and electronic separating brake.
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; Have mounting seat 15 bottom shell 11, the side of base 15 is provided with earth terminal 16; Described shell 11 surface is 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 socket 22, five core current socket 23, eight core signal plugs 24, operation knob and handle 25, alarm indicator 26, function setting window 27 and earth stud; The control module that five described core supply sockets, five core current sockets, eight core signal plugs, alarm indicator and function setting window are arranged with controller inside is electrically connected.
The bottom of controller of the present invention, the below of function setting window are provided with definite value and arrange table 28; There is in described function setting window LCDs 29, option tab 40 and SIM card draw-in groove 41; After SIM card networking is installed, net control can be set up by GPRS, realize 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, automatic detection breaker energy storage signal, detect that the non-energy storage of demarcation vacuum circuit breaker of intelligent branch then sends electric energy-stored order automatically, after intelligent branch demarcation vacuum circuit breaker receives energy storage order, automatically complete electric energy-stored;
Electric switch-on: the black operation knob on dextrorotation controller is to hand " dynamic circuit connector/reset " place, and controller exports switching signal, circuit breaker automatic closing;
Electronic separating brake: the black operation knob on left-handed controller is to " manually dividing " place, and controller exports sub-gate signal, switch automatic brake separating.
Operation principle of the present invention is: the fault of 10kV feeder line or equipment mainly contains phase fault and single-phase earthing two type, and controller processes respectively to these two kinds of faults;
The troubleshooting of phase fault: for the phase fault in user circle, controller compares by detecting the AC phase current of drawing from the inner CT of intelligent branch demarcation vacuum circuit breaker the generation judging fault with definite value, when there is over current fault in branch line user and line end user circle, controller detects overcurrent, after time delay judges, controller exports separating brake order and makes demarcation vacuum circuit breaker automatic brake separating, automatic excision over current fault, other user on transformer station and feeder line avoids power outage occurs, in order to avoid transient fault causes user to have a power failure for a long time, after controller protection act, reclosing is carried out to intelligent branch demarcation vacuum circuit breaker, reclosing number of times, time can set, maximum 3 times of reclosing number of times, in order to avoid permanent fault causes badly damaged to circuit, or the time coordinations problem of other protection, controller has done late reshutting acceleration protect function.
The troubleshooting of single-phase earthing: can be divided at the neutral grounding mode of China 10kV power distribution network: isolated neutral, neutral by arc extinction coil grounding and Neutral Point Through Low Resistance three kinds of modes.The basic handling method of controller to single phase ground fault compares by detecting the zero sequence current signal of drawing from the built-in zero sequence CT of intelligent branch demarcation vacuum circuit breaker the single phase ground fault distinguished and judge in user circle and out-of-bounds with definite value, for with sound single phase ground fault out-of-bounds, due to the zero-sequence current detected when single phase ground fault occurs the zero-sequence current detected from zero sequence CT in user circle, therefore, by suitable fixed value adjusting, can make and judging 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's demarcation vacuum circuit breaker load side, the zero-sequence current detected is:
I 01=3ωU 0C 1
Wherein U 0for power supply phase voltage, ω is frequency.
When earth fault occurs in intelligent branch's demarcation vacuum circuit breaker mains side, the zero-sequence current detected is:
I 02=3ωU 0C 2
Wherein U 0for power supply phase voltage, ω is frequency.
In general, C1 much larger than C2, therefore I 02than I 01, namely earth fault user out-of-bounds time the zero-sequence current that detects very little, and earth fault in user circle time the zero-sequence current that detects very large, by the setting of suitable definite value, controller can judge 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. Switch main body manual deciliter function
As general circuit breaker, intelligent branch demarcation vacuum circuit breaker possesses on-site manual deciliter and electronic deciliter controlling functions.
2. analog quantity measuring ability
Controller and Switch main body are with the use of can the biphase current of detection line, zero-sequence current and line voltage distribution, and above-mentioned analog signals is exported by Switch main body aviation socket, from the CT/IO socket bottom controller by aviation plug access controller.By the conversion of the signal of controller inside with calculate, can its runtime value of Real-Time Monitoring (measuring numerical value by receiving and process these after the maintain communications mouth of controller or configuration communication module with notebook computer).
3. protecting control function
A) zero-sequenceprotection
By the fixed value adjusting to controller and the monitoring to zero-sequence current, intelligent branch true residence circuit breaker of demarcating can be detected and judge the single phase ground fault in user circle, performs sub-switching operation, automatically excise earth fault after time delay reaches a definite value; Other user on transformer station and feeder line avoids power outage occurs; in order to avoid transient fault causes switch separating brake; reclosing setting can be carried out to intelligent branch demarcation vacuum circuit breaker. reclosing number of times, the time can sets itself; maximum 3 times of reclosing number of times; in order to avoid permanent fault causes badly damaged to circuit; or the time coordinations problem of other protection, intelligent branch demarcation vacuum circuit breaker has done late reshutting acceleration protect function.The controlling functions 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, when being set to intelligent branch's demarcation vacuum circuit breaker function, fixed and to phase current monitoring is connect by definite value, intelligence branch demarcation vacuum circuit breaker can be detected and judge the phase fault in user circle, after time delay judges, controller exports separating brake order and makes demarcation vacuum circuit breaker automatic brake separating, automatic excision over current fault, other user on transformer station and feeder line avoids power outage occurs, in order to avoid transient fault causes user to have a power failure for a long time, after controller protection act, reclosing is carried out to intelligent branch demarcation vacuum circuit breaker, reclosing number of times, time can set, maximum 3 times of reclosing number of times, in order to avoid permanent fault causes badly damaged to circuit, or the time coordinations problem of other protection, controller has done late reshutting acceleration protect function,
When 2, being set to demarcation load switch function, by fixed value adjusting and the monitoring to phase current, demarcation switch can be detected and judge the phase fault in user circle, in memory this malfunction after transformer station's outlet breaking being detected, sub-switching operation is performed, the short trouble before transformer station overlaps effectively in user-isolated boundary after time delay.
4. the separating brake under circuit power failure state and protection alarm function
Controller is when [automatically] running status, after out-of-bounds there is phase fault in user, transformer station's outlet switch breaking can be caused, controller is without input power, after whole device dead electricity, controller maintains it by storage capacitor and normally works, and can perform separating brake during this period and export (DC2200V) and switch is reliably divided explain.Be no matter that single phase ground fault or phase fault cause can only branch's demarcation vacuum circuit breaker protection act, the ALARM alarm indicator of controller is all often bright or glittering, there occurs single-phase earthing or phase fault in prompting user circle.
5. self-checking function
Controller is timer-controlled self-inspection (automatically being carried out by program control) when normal operation, and the object of self-inspection comprises definite value district, output loop, sampling channel, E 2pROM etc., when self-inspection is abnormal, light self-checking alarming indicator light, and locking closing loop.
The all operations of controller is all in the bottom of its circular case, and establish TV output loop to protect 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 attracted from switch-side, and IO socket connects the control cables attracted from switch-side.ALARM is protection act light-emitting diode index signal; Definite value setting window is closed by a sealing tegillum when equipment normally runs, and then opens this little small cup, operate accordingly when needs carry out fixed value modification or check that state is made in control.
A) when measurement cable is connected correctly with control cables, and Switch main body is when being in closing position, the operating grip of controller is in [automatically] position, then intelligent branch demarcation vacuum circuit breaker is in and automatically monitors running status, now once line fault generation in user circle, intelligent branch demarcation vacuum circuit breaker can complete the function that it excises fault automatically.
B) the control operation handle rotating counterclockwise controller, to [dividing] position, can make switch automatic brake separating.
C) after intelligent branch demarcation vacuum circuit breaker protection act; ALARM stand by lamp is bright, and the control operation handle rotating clockwise controller, to [reset] position, can remove ALARM alarm status; if do not taked Manual reset operation, ALARM alarm status then automatically terminates after 48 hrs.
D) electric quantity test function [electricity test button] intelligent branch demarcation vacuum circuit breaker needs the electricity process of self when handling failure, whether how many decision systems of electricity can handle failure condition well, so electric quantity test be very important " electric quantity test " two button depress simultaneously, normal operation in running indicator 4 seconds, now electric capacity electricity is qualified.
E) subsidiary communications function [RS-232/RS-485 interface] is mainly with safeguarding with communicating, and setting parameter etc. must to be modified setting by maintain communications mouth notebook computer.
Controller indicates various operating state by light-emitting diode.
" RUN " indicator light, this indicator light glittering when controller runs, it has internal electric source measuring ability, one second interval time.
" fault " indicator light, lights this indicator light during controller self test failure;
" overcurrent " indicator light, lights during phase current overdetermination value, extinguishes lower than during definite value;
" ground connection ' ' indicator light, light during earth current overdetermination value, extinguish lower than during definite value;
" point position " indicator light, when controlled switch is in separating brake, lights this indicator light.
Controller of the present invention as required, can increase and join communication module, and namely install SIM card and network, such wireless handheld terminal can show all parameters with Configuration Control Unit, and simultaneously the liquid crystal panel of hold controller and handheld terminal keep simultaneous display.
The just the specific embodiment of the present invention described in above specification, various illustrating is not construed as limiting flesh and blood of the present invention, person of an ordinary skill in the technical field after having read 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 (5)

1. intelligent branch demarcation vacuum circuit breaker the complete sets of equipment, is characterized in that: the split type controller comprising breaker body and be arranged on breaker body outside, be connected by cable unit with breaker body; Described controller detects the biphase current of breaker body, zero-sequence current and/or line voltage distribution, and controls electric energy-stored, the electric switch-on of breaker body and electronic separating brake; Described breaker body 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 the 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; 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 controller is arranged respectively; Described controller and breaker body are with the use of can the biphase current of detection line, zero-sequence current and line voltage distribution, the aviation socket of breaker body exports analog signals, analog signals passes through cable unit access controller from five core current sockets bottom controller and eight core signal plugs, by signal conversion and the calculating of controller inside, its runtime value of Real-Time Monitoring.
2. 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; The control module that five described core supply sockets, five core current sockets, eight core signal plugs, alarm indicator and function setting window are arranged with controller inside is electrically connected.
3. intelligent branch as claimed in claim 2 demarcation vacuum circuit breaker the complete sets of equipment, is characterized in that: the bottom of described controller, the below of function setting window are provided with definite value and arrange table; There is in described function setting window LCDs, option tab and SIM card draw-in groove.
4. 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: controller compares by detecting the AC phase current of drawing from the inner CT of intelligent branch demarcation vacuum circuit breaker the generation judging fault with definite value, when 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 judges, controller exports separating brake order and makes demarcation vacuum circuit breaker automatic brake separating, automatically excises over current fault;
Described one-phase ground protection: compare the single phase ground fault distinguished and judge in user circle and out-of-bounds with definite value by detecting the zero sequence current signal of drawing from the built-in zero sequence CT of intelligent branch demarcation vacuum circuit breaker; for user's single phase ground fault out-of-bounds; due to the zero-sequence current detected when single phase ground fault occurs the zero-sequence current detected from zero sequence CT in user circle; therefore; by fixed value adjusting, can make and judging exactly.
5. the guard method of intelligent branch as claimed in claim 4 demarcation vacuum circuit breaker the complete sets of equipment; it is characterized in that: in described phase fault protection; after controller protection act, carry out reclosing to intelligent branch demarcation vacuum circuit breaker, reclosing number of times mostly is 3 times most.
CN201210331481.5A 2012-09-08 2012-09-08 Intelligence branch's demarcation vacuum circuit breaker the complete sets of equipment and guard method thereof Expired - Fee Related CN103681087B (en)

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CN105006810A (en) * 2015-08-07 2015-10-28 中国石油化工股份有限公司 Fault processing method of neutral-point non-effective grounding system and corresponding processing system
CN106469905B (en) * 2016-11-11 2020-01-10 国网山东省电力公司枣庄供电公司 Distribution network protection method based on distribution network three-way defense line
CN107681779A (en) * 2017-09-06 2018-02-09 河南省三禾电气有限公司 One or two fusion high-pressure vacuum breakers and its monitoring method, system
CN108963989A (en) * 2018-06-26 2018-12-07 国网黑龙江省电力有限公司齐齐哈尔供电公司 Console mode intelligence control system metering integrated device and control guard method
CN112327102B (en) * 2020-11-02 2022-10-04 国网山东省电力公司威海供电公司 Outdoor breaking maintenance device for intelligent power distribution network

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