CN103368169A - Reverse power transmission protector - Google Patents
Reverse power transmission protector Download PDFInfo
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- CN103368169A CN103368169A CN2013102816359A CN201310281635A CN103368169A CN 103368169 A CN103368169 A CN 103368169A CN 2013102816359 A CN2013102816359 A CN 2013102816359A CN 201310281635 A CN201310281635 A CN 201310281635A CN 103368169 A CN103368169 A CN 103368169A
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Abstract
The invention discloses a reverse power transmission protector, which is characterized by comprising an open circuit isolation linkage device, a transformer substation side protection and control unit, a sampling unit and a power module, wherein the open circuit isolation linkage device comprises primary equipment and secondary equipment; the primary equipment consists of a disconnector, an isolator, a three-phase current transformer and a voltage transformer; the secondary equipment is an in situ protection and control unit; the primary sides of the disconnector, the isolator and the three-phase current transformer of the primary equipment are connected in series; the primary side of the voltage transformer of the primary equipment and the three-phase current transformer are connected in parallel; the secondary side of the three-phase current transformer and the secondary side of the voltage transformer of the primary equipment are connected with the in situ protection and control unit of the secondary equipment; the sampling unit is electrically connected with the transformer substation side protection and control unit; the transformer substation side protection and control unit and the in situ protection and control unit are electrically connected to form transformer substation feeder cabinet reverse power transmission protection; and the transformer substation side protection and control unit of the transformer substation feeder cabinet is electrically connected with the power module. The reverse power transmission protector has the advantages of reasonable structure and reliable action, and accident potential can be thoroughly eradicated.
Description
Technical field
The present invention relates to the power transmission and distribution field, is a kind of anti-non-electricity protector that send, and mainly is applicable to the feeder cabinet accident of human electric shock's of distribution transformer station prevention, avoids occuring the accident of human electric shock.
Background technology
Along with the development of electrical network, the handle rate of 35kV and following distribution line progressively increases, and this has also increased the potential safety hazard of distribution line to transformer station's feeder cabinet reverse charge when improving power supply reliability.In addition, the user is power autonomous also may send to circuit is counter.Described distribution line handle refers to: the conventional mode of connection of distribution line is to power with forms of radiation to distribution line by transformer station is single-ended, in order to improve power supply reliability, some distribution lines feed out circuit by the handle switch with another transformer station and realize being connected, and can change when this transformer station has a power failure by another transformer station's power supply.
Taking precautions against at present the counter measure of sending electric personal injury of feeder cabinet and mainly be by management means such as system, rules is main the constraint, and the implementation capacity of this management means is weak, take precautions against weak effect, can not fundamentally stop personal electric shock casualty accident.The station that also has (institute) is adopted and is connected with misoperation-proof locking device at transformer station's feeder switch cabinet mounting strap pyroelectric monitor instrument, switch cabinet door implements electric locking, this is a kind of technical measures, this technological means is to control by the unlatching of anti-error lock switch cabinet door, can " prevent from " opening the cabinet door of electricity,, still have two kinds of unsafe factors: the one, utilize " unlocking tool " still artificially unlocking open the cabinet door; The 2nd, there was not at that time electricity although open cabinet door, if between operational period send a telegram here suddenly in the line side, personal electric shock casualty accident might occur.Also have in the distribution line outlet block switch is installed, be commonly called as the isolation technology measure of " house dog ", this technical measures have the attribute of " technology+management ", but there are not linkage function, automaticity low, and be the controller switching equipment of distribution specialized department management because this measure relates to, different from the converting equipment management specialty of transformer station, need multidisciplinary, the multi-specialized close fit such as distribution, power transformation, scheduling, management, even like this, not only exhaust the people and drain the treasury, and because its management composition accounts for leadingly, or do not eliminate the anti-electrification hidden danger of sending.Thus, though do not cut off measure or have partition equipment do not form the interlock be the root place of causing personal electric shock casualty accident.Circuit breaker and the isolator of at present electrical network use, or claim isolation switch to belong to the equipment of two kinds of difference in functionalitys, the use of often will arranging in pairs or groups between the two, although needing collocation uses, but because two kinds of equipment are mutually discrete, do not have linkage function between the two, need manual operation.
Summary of the invention
The objective of the invention is, overcome the deficiencies in the prior art, provide a kind of rational in infrastructure, reliable in action, a kind of anti-non-electricity protector that send that can exterminate root and branch the hidden peril of accidents.
Realize that the technical scheme that the object of the invention adopts is, a kind of anti-non-electricity protector that send, it is characterized in that, it comprises: the isolation clutch opens circuit, transformer station's end protection control unit, sampling unit, power module, the described isolation clutch that opens circuit comprises by circuit breaker, isolator, threephase current transformer, the primary equipment that voltage transformer forms reaches and protects on the spot control unit is secondary device, the circuit breaker of described primary equipment, isolator and threephase current transformer primary side are connected in series, and putting in order to the line side by transformer substation side is followed successively by voltage transformer, threephase current transformer, circuit breaker, isolator; The voltage transformer primary side of described primary equipment is in the outer end of threephase current transformer primary side and in parallel with threephase current transformer, and the threephase current transformer secondary side of described primary equipment, voltage transformer secondary side and secondary device on the spot control unit are connected; Hold the protection control unit to be electrically connected by sampling unit with transformer station; transformer station's end protection control unit with protect on the spot control unit to be electrically connected to form that transformer station's feeder cabinet is counter send electric protection, the transformer station of described transformer station feeder cabinet holds and protects control unit to be electrically connected with power module.
The described isolator of isolating clutch that opens circuit comprises: the motor drive mechanism of insulator body, isolator, electromagnetic clutch; described electromagnetic clutch is connected with the motor drive mechanism of isolator; the motor drive mechanism of described isolator is connected with insulator body, and described electromagnetic clutch is electrically connected with protecting on the spot control unit.
The anti-non-electricity protector that send of the present invention, because adopt the isolation clutch that opens circuit, transformer station's end protection control unit, sampling unit, power module, the isolation clutch that opens circuit comprises the primary equipment that is comprised of circuit breaker, isolator, threephase current transformer, voltage transformer and protects on the spot control unit is secondary device; The circuit breaker of primary equipment, isolator and threephase current transformer primary side are connected in series, and putting in order to the line side by transformer substation side is followed successively by voltage transformer, threephase current transformer, circuit breaker, isolator; The voltage transformer primary side of primary equipment is in the outer end of threephase current transformer primary side and in parallel with threephase current transformer, and the threephase current transformer secondary side of primary equipment, voltage transformer secondary side and secondary device on the spot control unit are connected; Hold the protection control unit to be electrically connected by sampling unit with transformer station; transformer station's end protection control unit with protect on the spot control unit to be electrically connected to form that transformer station's feeder cabinet is counter send electric protection, the transformer station of described transformer station feeder cabinet holds and protects control unit to be electrically connected with power module.Control unit can send the logical process signal to circuit breaker on the spot, isolator is controlled, and by control unit and transformer station hold the protection control unit to contact on the spot, and obtain power supply and state information amount, forming integral inverted send electricity to control logic, make isolator and circuit breaker realize interlock, the isolation clutch that opens circuit holds the protection control unit to be electrically connected with transformer station, transformer station's end protection control unit is electrically connected with protecting on the spot control unit that transformer station's feeder cabinet of composition is counter to send electric protection, realize interlock with the switch of feeder cabinet, form that circuit is counter to send electric protection, wherein: the threephase current transformer secondary electric measurement of opening circuit and isolate clutch, the voltage transformer secondary electrical measurement, transformer station's feeder cabinet switch state series connection forms the feeder cabinet electrical shock protection; Transformer station's feeder cabinet has pyroelectric monitor amount, transformer station's feeder cabinet door switch position quantity, transformer station's feeder cabinet to toll breakdown defencive function investing method controlled quentity controlled variable series connection to form transformer station's feeder cabinet and toll breakdown protection; have rational in infrastructure; reliable in action can avoid occuring the advantages such as security incident.
Description of drawings
Fig. 1 is the anti-non-electricity protector structural representation that send;
Fig. 2 is the anti-isolation linkage device structure schematic diagram that opens circuit that send non-electricity protector;
Fig. 3 is the electrical shock protection principle schematic;
Fig. 4 is that the electrical shock protection logic function send electric protection to dock schematic diagram with counter;
Fig. 5 is isolator 2 and circuit breaker 1 self-adapting linkage logic diagram;
Fig. 6 is that isolator 2 is controlled motor and divided, closes and turn to the work schematic diagram;
Fig. 7 is that isolator 2 is controlled the motor steering workflow diagram;
Fig. 8 is the structural representation of sampling unit 8;
Fig. 9 transmits schematic diagram for the anti-non-electricity protector main logic that send;
Figure 10 is the anti-non-electricity protector main logic block diagram that send;
Figure 11 opens circuit to isolate the interlock combined floodgate logic diagram of clutch and transformer station's feeder cabinet switch;
Figure 12 is that transformer station's feeder switch cabinet is tolled breakdown the protection logical schematic.
Embodiment
See figures.1.and.2, a kind of anti-non-electricity protector that send of the present invention comprises: the isolation clutch that opens circuit, transformer station's end protection control unit 7, sampling unit 8, power module 9.The described isolation clutch that opens circuit comprises circuit breaker 1, isolator 2, electromagnetic clutch 3, current transformer 4, voltage transformer 5, protects motor drive mechanism 11 and the mechanical latching parts 12 of control unit 6 and circuit breaker on the spot; the motor drive mechanism 21 of isolator and mechanical locking device 22; protect on the spot functional module 60 and control line 61 and outreach control line 62 on the spot in the control unit 6; the on the spot remote controller 13 of circuit breaker 1, and the manual lever 23 of isolator 2 forms.The primary equipment that is formed by circuit breaker 1, isolator 2, threephase current transformer 4, voltage transformer 5 and protect on the spot control unit 6 to be secondary device, the primary side of the circuit breaker 1 of described primary equipment, isolator 2 and threephase current transformer 4 is connected in series, and putting in order to the line side by transformer substation side is followed successively by voltage transformer 5, threephase current transformer 4, circuit breaker 1, isolator 2; Voltage transformer 5 primary sides of described primary equipment are in the outer end of threephase current transformer 4 primary sides and in parallel with threephase current transformer 4, and threephase current transformer 4 secondary sides of described primary equipment, voltage transformer 5 secondary sides and secondary device on the spot control unit 6 are connected; Hold protection control unit 7 to be electrically connected by sample line 81 with transformer station by described sampling unit 8; described transformer station end protection control unit 7 is by outreaching control line 62 and protect on the spot control unit 6 to be electrically connected to form that transformer station's feeder cabinet is counter send electric protection, and described power module 9 is held with the transformer station of transformer station feeder cabinet by power line 91 and protected control unit 7 to be electrically connected.The described isolator 2 of isolating clutch that opens circuit comprises: the body of isolator 2, the motor drive mechanism of isolator 21, electromagnetic clutch 3; described electromagnetic clutch 3 is connected with the motor drive mechanism 21 of isolator; the motor drive mechanism 21 of described isolator is connected with the body of isolator 2, and described electromagnetic clutch 3 is electrically connected with protecting on the spot control unit 6.Transformer station's end protection control unit 7 has functional module 70.Power module 9 is protected control unit 7, is protected control unit 6 and the isolation clutch that opens circuit thereof that power supply is provided on the spot to transformer station's end by power line 91.The switch of 8 pairs of transformer station's feeder cabinets of sampling unit, disconnecting link, checking experiment mode, bypass turn for informations such as modes, and pass to the functional module 70 participation logics of transformer station's end protection control unit 7 through sample line 81
﹠Process, process by outreaching 62 pairs of the control lines isolation clutch that opens circuit and implement interlock.
With reference to Fig. 2, concrete structure and the logical relation of isolating clutch that open circuit is described below:
In the isolation clutch primary equipment loop of opening circuit, circuit breaker 1 is connected with the series connection form with the electric part of isolator 2, in electric loop, also be in series with simultaneously threephase current transformer 4, voltage transformer 5 is connected in parallel in the electric loop, these primary equipments are by connecting successively from the transformer substation side to the line side, and order is: voltage transformer 5, threephase current transformer 4, circuit breaker 1, isolator 2; The linear quadratic control equipment of isolating clutch of opening circuit comprises the secondary side output variable of on the spot control element, current transformer 4 and the voltage transformer 5 of protection controller 6 etc., and these secondary circuit amount of information are all introduced the logic of protecting on the spot control unit 6 to participate in functional modules 60
﹠Process, the result of logical process is by motor drive mechanism 11, the motor drive mechanism 21 of isolator, the electromagnetic clutch 3 of control line 61 access circuit breakers are controlled on the spot.Contact and obtain power supply and state and divide-shut brake and control command information by outreaching control line 62 and transformer station end protection control unit 7, form integral inverted and send electric protection to control logic
﹠The mechanical part of the motor drive mechanism 21 of isolator is realized interlock by electromagnetic clutch 3 and the motor drive mechanism 11 of circuit breaker, and this interlock is to finish by the secondary control loop logical process of functional module 60.Circuit breaker 1 its mechanical latching parts 12 when closing position pin the mechanical locking device 22 of isolator 2, and circuit breaker 1 is removed it to the mechanical latching of isolator 2 when open position, and in addition, secondary control loop also has electric blocking.The remote controller 13 of circuit breaker 1 can be controlled circuit breaker 1 on the spot, in the situation that clutch 3 leaves and the manual lever of the available isolator 2 of mechanical locking device 22 unlockings 23 carries out the manual operation of isolator.The purpose that electromagnetic clutch 3 is set is the repetition locking of taking for the reliability that guarantees isolator 2 interlocks, realizes simultaneously the manual operation of isolator 2 by removing the driving torque active force.
With reference to Fig. 3 and Fig. 4, the Main Function of isolating clutch that opens circuit is to cooperate with transforming plant protecting control unit 7, finishing blocking-up, circuit is counter send power supply and implement electrical isolation, state information when outreaching control line 62 transformer station's feeder switch cabinet not being bothered to see me out electricity is sent to protects control unit 6 on the spot, the voltage 51 of 60 pairs of voltage transformers 5 of its functional module is measured, annotate through time-delay Ty(when the affirmation circuit truly has reverse electrical source: time-delay Ty mainly considers anti-shake interference, can be taken as 0.5 ~ 1 second) send separating brake instruction 52, drive the isolation clutch separating brake that opens circuit according to action logic, otherwise separating brake will not link; At the switch cabinet of converting station electric run duration of not bothering to see me out; if the magnitude of current 41 of threephase current transformer 4 has electric current; then be judged to be circuit and sent voltage and electric shock accidents has occured to transformer station is counter, the phase current 42Lx of electrical shock protection or zero-sequence current 42Lo send immediately protection instruction 42 and drive the isolation clutch enforcement separating brake that opens circuit.Voltage transformer 5 belongs to open circuit isolates the equipped equipment of clutch; be installed on transformer substation side; as unexpected the combined floodgate suddenly in the judgement of live wire road situation behind the isolation clutch separating brake that opens circuit; threephase current transformer 4 also belongs to open circuit isolates the equipped equipment of clutch; its three-phase current 42Lx takes from respectively A; B; this phase of C; zero-sequence current 42Lo is then obtained mutually by zero of star wiring; the electrical shock protection current setting gets final product to the uneven stray electrical current that opens circuit between the isolation clutch installation place by avoiding transformer station; this programme is got 10 ~ 20mA, and the protection electric measurement signal need amplify processing.The configurable distribution line protection in the on the spot protection control unit 6 of isolating clutch of opening circuit, as: overcurrent protection and reclosing etc.
With reference to Fig. 5, because " transformer substation switch quantity of state " condition does not possess, without separating brake command signal F output, deactivate by electrical shock protection in the normal transmission operation situation of transformer station's feeder switch cabinet for the electrical shock protection function of functional module 60 of protecting on the spot control unit 6; Only " transformer substation switch quantity of state " conditions being possessed under transformer station's feeder cabinet is not bothered to see me out electric ruuning situation has separating brake command signal F output, drive when opening circuit isolation clutch separating brake, and output closing locking signal B, the isolation clutch of forbidding opening circuit closes a floodgate.
With reference to Fig. 2 and Fig. 5, the secondary circuit electrical wiring of the present embodiment be switching value contact series, parallel, series-parallel connection connect to form every part " with ", the action logic such as "or", " forbidding ", for ease of narration and understanding, the imitative logical program block diagram form of employing embodies and describes in this explanation.
With reference to Fig. 5, the divide-shut brake that the isolation clutch that opens circuit receives controls command information and the detailed annotation of its action behavior is: the isolation clutch that opens circuit directly acts on the circuit breaker 1 unconditional separating brake of carrying out when obtaining separating brake instruction F, circuit breaker 1 separating brake automatically performs separating brake by Tg time-delay isolator 2, implement separating brakes without time-delay isolator 2 when perhaps when circuit breaker 1 gate-dividing state, receiving separation in one's hands and from the instruction AND gate of device 2 output being arranged, " circuit breaker 1 co-bit " among the figure forbids that isolator 2 separating brakes are that the auxiliary contact of considering circuit breaker 1 is reliably changed, and prevent isolator 2 misoperations; Disconnected obtain reclosing command H and circuit breaker 1 every device and when open position " with door " has output, implement isolator 2 in advance and close a floodgate, perhaps circuit breaker 1 receives under the prerequisite that when open position hand closes the instruction of isolator 2 " with door " and has output to implement isolator 2 combined floodgates, isolator 2 has really closed a floodgate and has implemented behind the door circuit breaker 1 combined floodgate by Tc and " forbidding ", " circuit breaker 1 co-bit " among the figure forbids that it is that the auxiliary contact of considering circuit breaker 1 is reliably changed that isolator 2 closes a floodgate, prevent isolator 2 misoperations, " separating brake instruction F " forbids that it is to consider that disconnected the reception every device can not false switching between the separating brake order period that circuit breaker 1 closes a floodgate.
With reference to Fig. 2 and Fig. 6, its action behavior and current state are carried out anticipation before isolator 2 divide-shut brakes, that is: motor is prepared to close or before separating brake implements, and distinguishes that isolator 2 has been in to close a floodgate or during gate-dividing state, automatically stop machine operation; Only prepare to close or before separating brake implements at motor, distinguish that isolator 2 really when separating brake or "on" position, then proceeds interlock, that is: electromagnetic clutch joints → electric machine rotation → electromagnetic clutch separation.
With reference to Fig. 7, electromagnetic clutch 3 is described with the motor drive mechanism 21 electric machine rotation matching relationships of isolator.Isolator 2 is controlled the detailed annotation of instruction and motor steering workflow: flow nodes 10 will be pointed to flow nodes 20 and carry out the virtual condition judgement when isolator 2 is received reclosing command, if isolator 2 co-bit then flow nodes hold to 120 and finish, flow nodes proceeds to 30 if isolator 2 is actual when being in minute position, flow process 30 is implemented electromagnetic clutch 3 and is engaged, electromagnetic clutch 3 engages follow-up afterflow journey node 40 and carries out the motor forward rotation, electric machine rotation isolator 2 closes a floodgate, the close a floodgate rear flow nodes 50 that puts in place of isolator 2 is routed to flow nodes 60 electromagnetic clutchs 3 and separates, and flow nodes to 120 stopped after electromagnetic clutch 3 separated; Flowchart process when isolator 2 is received the separating brake instruction is similar with combined floodgate, and the separating brake flow nodes comprises 70,80,90,100,110.
With reference to Fig. 8; acquisition module 8 comprises: the feeder cabinet switch; quantity of state 82, feeder cabinet isolation switch quantity of state 83, checking experiment mode quantity of state 84, the bypass replacement that is circuit breaker 1 send quantity of state 85, has stream to differentiate electrical measurement 86; these quantity of states and electrical measurement consist of the anti-fundamental that send electric protection main logic functional module 70; also have in addition station end manual mode operation and remote control function; wherein bypass replacement send quantity of state 85 to be optional amount; Electric Power Network Planning is phased out hospital bus bar wiring pattern; generally can not relate to, only consider as specific demand.
With reference to Fig. 8 and Figure 10, there is stream to differentiate that 86 electrical measurement takes from the current transformer in the feeder cabinet, the size of operating value is avoided sky and is zeroized and float electric current and get final product, and this example is set to 30-50mA.
With reference to Fig. 8 ~ Figure 10; transformer station's end protection control unit 7 is obtained state information amount 82 ~ 85 and the electrical measurement amount of information 86 of sampling unit 8 by sample line 81; and send electric protection main logic device 70 programming through counter; output function instruction 72; operational order 72 is delivered to and protects on the spot control unit 6 through outreaching control line 62; protect on the spot control unit 6 to drive to open circuit 1 ~ 2 of isolation clutch to carry out minute or feed motion; the line disconnection side is counter to be sent the power supply of transformer station and implements electrical isolation, or before sending electricity the isolation clutch that opens circuit is closed a floodgate in advance.The logical operation instruction 72 of transformer station's end protection control unit 7 outputs has three kinds: instruction one is separating brake instruction 72F, and instruction two is reclosing command 72H, and instruction three is blocking order 72B, and wherein blocking order 72B forbids separating brake or No switching on exactly.Feeder cabinet switch state 82 just starts the anti-electric protection main program that send with one of 83 two quantity of states of isolation switch quantity of state at open position; but be subject to stream and differentiated that electrical measurement 86, bypass turn for quantity of state 85 lockings; and feeder cabinet switch maintenance its switch of when test is deciliter transmission test repeatedly; this situation open circuit the isolation clutch 2 should not follow action, therefore checking experiment quantity of state 84 also is made as barring condition.Open circuit and whether carry out actual act after isolation clutch divide-shut brake starts, depend on the anti-electric protection main logic that send.
With reference to Figure 10; the counter logical operation instruction 72 of sending the output of electric protection main logic device 70; the condition of its separating brake instruction 72F is: do not have under the prerequisite of separating brake blocking order 72B; one of the quantity of state 82 of feeder cabinet switch or feeder cabinet isolation switch quantity of state 83 are at open position; and export separating brake instruction 72F with the voltage monitoring amount 52 of protecting on the spot control unit 6 outputs by " logical AND " after surpassing the time-delay Tf that adjusts, making opens circuit isolates 1 ~ 2 separating brake of clutch.Perhaps hold manual separating brake or remote control separating brake without time-delay transformer station as required.The condition of its reclosing command 72H is: do not have under the prerequisite of closing locking instruction 72B, close a floodgate or the remote control combined floodgate without time-delay transformer station end is manual as required, output reclosing command 72H closes a floodgate 1 ~ 2 of the isolation clutch that opens circuit.Its blocking order 72B to the disable condition that separating brake instruction 72F implements is: have stream to differentiate that electrical measurement 86 measured values surpass set point, or the bypass replacement of this circuit send quantity of state 85 that output is arranged; The barring condition that reclosing command 72H is implemented is: feeder cabinet switch transmission test mode quantity of state 84 has output or transformer station's end protection control unit 6 to send failure locking signal B, sees Fig. 3.Another barring condition among the closing locking 72B is to protect on the spot the related electric shock failure locking signal B of control unit 6 functional modules 60, i.e. electrical shock protection 42 has output.Be specially: during transformer station's feeder cabinet switch and the isolation switch separating brake; the isolation clutch that opens circuit should be in the interlock gate-dividing state; isolation clutch accident is closed a floodgate in the live wire road if open circuit around here; then electrical shock protection 42 senses transformer station and breaks down; because transformer station's feeder cabinet switch or isolation switch are at open position; fault current can not be provided; and for the fault outside the circuit; electrical shock protection 42 can not sense; so the fault that senses in such cases can be determined in the station during switch cubicle; electrical shock protection 42 action outputs are sent separating brake instruction F on the one hand immediately, send simultaneously on the other hand closing locking instruction B.Interlock separating brake delay time Tf considers two aspect factors, and the one, avoid circuit permanent fault " protection action trip time "+" reclosure time "+" protection is moved the trip time again "+" three minutes send by force time "+" nargin "; The 2nd, can not surpass " operation opening time "+" pull out handcart and do safety measure "+" opening switch cubicle "-" nargin ".Comprehensive two aspect factors, this example was got 8-10 minute.Instead send electric protection main logic detailed annotation to be: one of feeder cabinet switch state 82 or disconnecting link quantity of state 83 AND gate when minute position has output to start time-delay Tf, if protect on the spot the line side of control unit 6 to have reverse charge to press 52 behind the time-delay Tf simultaneously, then AND gate has output resume to carry out separating brake, output separating brake instruction 72F, do not judge without time-delay whether the line side has voltage to implement to open circuit and isolate the clutch separating brake when perhaps receiving the instruction of remote manual control separating brake yet, but the prerequisite of its separating brake instruction 72F output is without disable condition, namely load current differentiate 86 and bypass turn for quantity of state and be 0; The making process of isolating clutch that opens circuit is that OR-gate has reclosing command output 72H when the remote control reclosing command being arranged or manually controlling one of reclosing command, reclosing command 72H is controlled by checking experiment state locking 84 and other lockings B, and the isolation clutch misoperation that prevents from opening circuit in the feeder cabinet transmission test process is closed a floodgate line voltage distribution is introduced feeder cabinet.Protecting on the spot the separating brake instruction F of control unit 6 functional modules 60 outputs is instruction of the same race with the separating brake instruction 72F that station end protection control unit 7 sends, and all will making opens circuit isolates 1 ~ 2 separating brake of clutch; Protecting on the spot the closing locking instruction B of control unit 6 outputs is instruction of the same race with the blocking order 72B that station end protection control unit 7 sends, and 1 ~ 2 of the isolation clutch of all will forbidding opening circuit closes a floodgate.Protect on the spot control unit 6 function logic 60 and with the anti-opposite joining relation that send non-electricity protector main logic device 70 as shown in Figure 4.Electrical shock protection 42 is not only sent under the electric prerequisite at transformer station's feeder cabinet, electric shock fault instantaneous protection and have electricity to monitor, fault-free time-delay Ty protection, that is: 1 ~ 2 accident of isolating clutch that opens circuit is closed a floodgate in the live wire road, sense when the electric shock fault occurs with zero second time instantaneous operation excision power supply, dispose: phase overcurrent protection 42Lx and zero sequence capacitance current protection 42Lo, this electrical shock protection fault current value is small, get final product to distribution line unsymmetrical current between the outlet shaft tower by avoiding transformer station, this example is got 10 ~ 20mA, in fact after processing by main logic 70, electrical shock protection 42 substantially use less than; When protecting on the spot the control unit 6 interior voltages of monitoring 52 that output is arranged, behind time-delay Ty, participate in counter sending in the non-electricity protector main logic 70 through locking excision power supply.Threephase current transformer 4, voltage transformer 5 are the equipped equipment of isolation clutch that opens circuit, and voltage transformer 5 is installed by transformer substation side.Have voltage prison side to participate in main logic 70 programmings through time-delay Ty output 52, as prevention switch cubicle electric shock measure, the unnecessary constraints of its delay time Ty is avoided shaking interference, is taken as 0.5-1S and gets final product.
With reference to Figure 11; the interlocking equipment of isolation clutch as transformer station's feeder cabinet switch opens circuit; because it belongs to controller switching equipment; generally do not set up related with automation of transformation substations equipment; can send electricity because can't remote control affecting circuit; for this reason; this programme is except having configured the remote control operation-interface; also " interlock is closed a floodgate " functional programming is carried out in the main logic device 70 of transformer station's end protection control unit 7; this " interlock is closed a floodgate " logic is: if 1 ~ 2 of the isolation clutch that opens circuit when transformer station's feeder cabinet switch combined floodgate send electricity is in open position; then make its combined floodgate 82 be transformer station's feeder cabinet switch "on" position amount through time-delay Th; 83 is transformer station's feeder cabinet isolation switch "on" position amount; 1 isolates 1 ~ 2 open position quantity of state of clutch for opening circuit, through sending reclosing command behind the time-delay Th.The interlock combined floodgate logical time delay Th that isolates clutch of opening circuit considers the constraint that there is no need; sending after the electricity operation as early as possible by feeder cabinet, interlock gets final product; can consider the factor of the circuit " protection transmission lead to add simulated failure electric parameters time "+" nargin " of feeder cabinet switch when the closing position; this example was got 0.5 ~ 1 minute, and this time can be cancelled.Isolation clutch and the feeder cabinet switch combined floodgate interlock logical description that opens circuit is: feeder cabinet switch state 82, disconnecting link quantity of state 83 are all at closing position, to be in the open position quantity of state be 1 o'clock to the isolation clutch and open circuit, and three conditions of AND gate satisfy simultaneously by time-delay Th output implements disconnected combined floodgate every device.The high-voltage electriferous display locking device of transformer station's feeder cabinet is realized being connected with misoperation-proof locking device, possessed by microcomputer anti-error program and lockset control cubicle door opening technology, but still can open charged cabinet door by " unlocking tool " and cause electric shock accidents, namely " toll breakdown ".Considered the anti-caution safeguard measure of tolling breakdown in this programme; in case charged cabinet door is opened by force; just start the electrical shock protection program isolation clutch separating brake that will open circuit; this is the expansion to anti mis-closedown function; the careful use of this expanded function to be to avoid unnecessary separating brake, can take in the loop " tolling breakdown defencive function drops into " diverter switch or controlled in flakes.
With reference to Figure 12, feeder cabinet is tolled breakdown the detailed annotation of protection logic and is: feeder cabinet inside has electricity, feeder cabinet door to be opened, to toll breakdown defencive function in " input ", carries out circuit breaker 1 separating brake when these three conditions satisfy simultaneously.Illustrate: in fact its electric control loop is exactly that three contacts are series in the controlled breaker open operation control loop; Consider two-way output in the example, the one tunnel controls the isolation clutch that opens circuit, and another road control feeder cabinet or upper level switch specifically use according to on-the-spot needs.
The motor drive mechanism of the described circuit breaker 1 of isolating clutch of opening circuit is spring energy agency, and arc control device adopt vacuum extinction, and circuit breaker 1 and isolator 2 are controlled motor to be direct current machine 220V or to exchange the 380V motor; Electromagnetic clutch 3 is direct current 220V or alternating current 220V, and motor and electromagnetic clutch power are complementary, and this example adopts DC power supply and praises highly DC power system.Protect on the spot the protection control logic of control unit 6 and transformer station end protection control unit 7 by this programme design editor.
Specific embodiments of the invention and non exhaustive, those skilled in the art copy and improve the scope that should belong to claim protection of the present invention without what creative work carried out.
Claims (2)
1. anti-non-electricity protector that send, it is characterized in that, it comprises: the isolation clutch that opens circuit, transformer station's end protection control unit, sampling unit, power module, the described isolation clutch that opens circuit comprises the primary equipment that is comprised of circuit breaker, isolator, threephase current transformer, voltage transformer and protects on the spot control unit is secondary device, the circuit breaker of described primary equipment, isolator and threephase current transformer primary side are connected in series, and putting in order to the line side by transformer substation side is followed successively by voltage transformer, threephase current transformer, circuit breaker, isolator; The voltage transformer primary side of described primary equipment is in the outer end of threephase current transformer primary side and in parallel with threephase current transformer, and the threephase current transformer secondary side of described primary equipment, voltage transformer secondary side and secondary device on the spot control unit are connected; Hold the protection control unit to be electrically connected by sampling unit with transformer station; transformer station's end protection control unit with protect on the spot control unit to be electrically connected to form that transformer station's feeder cabinet is counter send electric protection, the transformer station of described transformer station feeder cabinet holds and protects control unit to be electrically connected with power module.
2. a kind of anti-non-electricity protector that send according to claim 1; it is characterized in that; the described isolator of isolating clutch that opens circuit comprises: the motor drive mechanism of insulator body, isolator, electromagnetic clutch; described electromagnetic clutch is connected with the motor drive mechanism of isolator; the motor drive mechanism of described isolator is connected with insulator body, and described electromagnetic clutch is electrically connected with protecting on the spot control unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310281635.9A CN103368169B (en) | 2013-07-07 | 2013-07-07 | A kind of anti-power transmission protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310281635.9A CN103368169B (en) | 2013-07-07 | 2013-07-07 | A kind of anti-power transmission protector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103368169A true CN103368169A (en) | 2013-10-23 |
| CN103368169B CN103368169B (en) | 2016-04-20 |
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| CN201310281635.9A Active CN103368169B (en) | 2013-07-07 | 2013-07-07 | A kind of anti-power transmission protector |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103746375A (en) * | 2014-01-15 | 2014-04-23 | 国家电网公司 | Automatic small-power supply removal device |
| CN104614603A (en) * | 2015-01-08 | 2015-05-13 | 国电南瑞科技股份有限公司 | On-site protection device status detection system and detection method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103746375A (en) * | 2014-01-15 | 2014-04-23 | 国家电网公司 | Automatic small-power supply removal device |
| CN104614603A (en) * | 2015-01-08 | 2015-05-13 | 国电南瑞科技股份有限公司 | On-site protection device status detection system and detection method thereof |
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| CN103368169B (en) | 2016-04-20 |
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