CN203398783U - Reverse power transmission protector - Google Patents

Abstract

A reverse power transmission protector is characterized by including a circuit break isolation linkage device, a substation-side protection control unit, a sampling unit, and a power module; the circuit break isolation linkage device comprises a primary device which is formed by a circuit breaker, an isolator, a three-phase current transformer, and a voltage transformer, and an in situ protection control unit; the in situ protection control unit forms a secondary device; in the primary device, the circuit breaker, the isolator and the primary side of the three-phase current transformer are connected in series; in the primary device, the primary side of the voltage transformer is in parallel connection with the three-phase current transformer; the secondary side of the three-phase current transformer of the primary device, the secondary side of the voltage transformer of the primary device, and the secondary device of the in situ control unit are connected; the sampling unit and the substation-side protection control unit are electrically connected; the substation-side protection control unit and the in situ protection control unit are electrically connected to form reverse power transmission protection of a substation feeder cabinet; and the substation-side protection control unit of the substation feeder cabinet is electrically connected with the power module. The advantages of being reasonable in structure, reliable in action, capable of thoroughly eradicating the hidden dangers of accidents and etc. are realized.

Description

A kind of anti-power transmission protector

Technical field

The utility model relates to power transmission and distribution field, is a kind of anti-power transmission protector, is mainly applicable to the feeder cabinet accident of human electric shock's of distribution transformer station prevention, avoids occurring 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,, when improving power supply reliability, has also increased the potential safety hazard of distribution line to transformer station's feeder cabinet reverse charge.In addition, user is power autonomous also may send to circuit is counter.Described distribution line handle refers to: the conventional mode of connection Shi Youyige of distribution line transformer station is single-ended powers with forms of radiation to distribution line, in order to improve power supply reliability, some distribution lines are fed out when circuit realization is connected the power failure of ，Dang Ben transformer station and can change by another transformer station and power with another transformer station by handle switch.

The measure of taking precautions against at present the anti-power transmission personal injury of feeder cabinet is to be mainly main constraint by management means such as system, rules, and the implementation capacity of this management means is weak, take precautions against weak effect, can not fundamentally stop personal electric shock casualty accident.Also the station having (institute) adopts 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 electric cabinet door,, still there are two kinds of unsafe factors: the one, utilize " unlocking tool " still artificially unlocking open cabinet door; The 2nd, although open cabinet door, there is no at that time electricity, if send a telegram here suddenly in line side between operational period, likely there is personal electric shock casualty accident.Also have in 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 do not have linkage function, automaticity low, and what relate to due to this measure is the controller switching equipment of distribution specialized department management, 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, still eliminate Bu Liaofan power transmission accident potential.Thus, though do not cut off measure or have partition equipment do not form interlock be the root place of causing personal electric shock casualty accident.Electrical network is used at present circuit breaker and isolator, 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, there is no linkage function between the two, need manual operation.

Summary of the invention

The purpose of this utility model is, overcomes the deficiencies in the prior art, provides a kind of rational in infrastructure, reliable in action, a kind of anti-power transmission protector that can exterminate root and branch the hidden peril of accidents.

Realizing the technical scheme that the utility model object adopts is, a kind of anti-power transmission protector, it is characterized in that, it comprises: 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 and protect on the spot control unit, protect on the spot control unit to form secondary device, the circuit breaker of described primary equipment, isolator and threephase current transformer primary side are connected in series, by transformer substation side, to line side, put in order and be 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 protect control unit to be connected with secondary device on the spot, by sampling unit, hold protection control unit to be electrically connected to transformer station, transformer station's end protection control unit is electrically connected to the anti-power transmission protection of composition transformer station feeder cabinet with protecting on the spot control unit, and transformer station's end protection control unit of described transformer station feeder cabinet is electrically connected to 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 to protecting on the spot control unit.

Anti-power transmission protector of the present utility model, due to employing open circuit isolation clutch, transformer station end protection control unit, sampling unit, power module, the isolation clutch that opens circuit comprises the primary equipment being comprised of circuit breaker, isolator, threephase current transformer, voltage transformer and is the control unit of protection on the spot of secondary device; The circuit breaker of primary equipment, isolator and threephase current transformer primary side are connected in series, and by transformer substation side, put in order be followed successively by voltage transformer, threephase current transformer, circuit breaker, isolator to line side; 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; By sampling unit, hold protection control unit to be electrically connected to transformer station; transformer station's end protection control unit is electrically connected to the anti-power transmission protection of composition transformer station feeder cabinet with protecting on the spot control unit, and transformer station's end protection control unit of described transformer station feeder cabinet is electrically connected to power module.Control unit can send logical process signal to circuit breaker on the spot, isolator is controlled, and by control unit and transformer station's end protection control unit contact on the spot, and obtain power supply and state information amount, form integral inverted power transmission and control logic, make isolator and circuit breaker realize interlock, the isolation clutch that opens circuit holds protection control unit to be electrically connected to transformer station, transformer station's end protection control unit is electrically connected to the anti-power transmission protection of the transformer station's feeder cabinet forming with protecting on the spot control unit, realize interlock with the switch of feeder cabinet, form the anti-power transmission protection of circuit, wherein: open circuit and isolate the threephase current transformer secondary electrical measurement of clutch, voltage transformer secondary electrical measurement, transformer station's feeder cabinet switch state series connection forms feeder cabinet electrical shock protection, transformer station's feeder cabinet has pyroelectric monitor Liang, transformer station 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 occurring the advantages such as security incident.

Accompanying drawing explanation

Fig. 1 is anti-power transmission protector structure schematic diagram;

Fig. 2 is the isolation linkage device structure schematic diagram that opens circuit of anti-power transmission protector;

Fig. 3 is electrical shock protection principle schematic;

Fig. 4 is that electrical shock protection logic function is docked schematic diagram with anti-power transmission protection;

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 work schematic diagram;

Fig. 7 is that isolator 2 is controlled motor steering workflow diagram;

Fig. 8 is the structural representation of sampling unit 8;

Fig. 9 is that anti-power transmission protector main logic transmits schematic diagram;

Figure 10 is anti-power transmission protector main logic block diagram;

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 protection logical schematic.

Embodiment

See figures.1.and.2, a kind of anti-power transmission protector of the present utility model 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, the motor drive mechanism 11 of protecting on the spot control unit 6 and circuit breaker and mechanical latching parts 12; the motor drive mechanism 21 of isolator and mechanical locking device 22; protect on the spot functional module 60 in control unit 6 and control line 61 and outreach control line 62 on the spot; the remote controller on the spot 13 of circuit breaker 1, and the manual lever 23 of isolator 2 forms.The primary equipment being formed by circuit breaker 1, isolator 2, threephase current transformer 4, voltage transformer 5 and protect on the spot control unit 6 for 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 puts in order be followed successively by voltage transformer 5, threephase current transformer 4, circuit breaker 1, isolator 2 by transformer substation side to line side; 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 protect control unit 6 to be connected with secondary device on the spot; By described sampling unit 8, by sample line 81Yu transformer station end protection control unit 7, be electrically connected to; described transformer station end protection control unit 7 is protected with protecting on the spot control unit 6 to be electrically connected to form the anti-power transmission of transformer station's feeder cabinet by outreaching control line 62, and described power module 9 is protected control unit 7 electrical connections by transformer station's end of power line 91Yu transformer station feeder cabinet.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 to protecting on the spot control unit 6.Transformer station's end protection control unit 7 has functional module 70.Power module 9 is by power line 91Xiang transformer station end protection control unit 7, protect control unit 6 and the isolation clutch that opens circuit provides power supply on the spot.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 through sample line 81, pass to the functional module 70 participation logics of transformer station's end protection control unit 7<b TranNum="93">&</b>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 series connection form with the electric part of isolator 2, in electric loop, be also in series with threephase current transformer 4 simultaneously, voltage transformer 5 is connected in parallel in electric loop, these primary equipments are by connecting successively from transformer substation side to line side, and order is: voltage transformer 5, threephase current transformer 4, circuit breaker 1, isolator 2; Open circuit and isolate secondary side output variable that the linear quadratic control equipment of clutch comprises control element, current transformer 4 and the voltage transformer 5 of protecting on the spot control unit 6 etc., 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<b TranNum="96">&</b>process, the result of logical process by control line 61 access motor drive mechanisms 11 of circuit breaker on the spot, the motor drive mechanism 21 of isolator, electromagnetic clutch 3 control.By outreaching end protection control unit 7 contacts of control line 62Yu transformer station, obtain power supply and state and divide-shut brake and control command information, form the protection of integral inverted power transmission and control logic<b TranNum="97">&</b>.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 lean on the secondary control loop logical process of functional module 60 to complete.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 its mechanical latching to 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, clutch 3 leave and mechanical locking device 22 unlocking in the situation that the manual lever 23 of available isolator 2 carry out the manual operation of isolator.The object that electromagnetic clutch 3 is set is the repetition locking for guaranteeing that the reliability of isolator 2 interlocks is taked, and realizes the manual operation of isolator 2 by removing driving torque active force simultaneously.

With reference to Fig. 3 and Fig. 4, the Main Function of isolating clutch that opens circuit is to coordinate with transforming plant protecting control unit 7, complete the blocking-up anti-power transmission power supply of circuit and implement electrical isolation, outreach control line 62Jiang transformer station feeder switch cabinet not state information during power transmission be sent to and protect on the spot control unit 6, the voltage 51 of 60 pairs of voltage transformers 5 of its functional module is measured, confirm when circuit truly has reverse electrical source to note through time delay Ty(: time delay Ty mainly considers anti-shake interference, can be taken as 0.5 ~ 1 second) send separating brake instruction 52, according to action logic, drive the isolation clutch separating brake that opens circuit, otherwise, separating brake will not link, at switch cabinet of converting station power transmission run duration not, if the magnitude of current 41 of threephase current transformer 4 has electric current, be judged to be circuit and sent voltage and electric shock accidents has occurred 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 that opens circuit to implement separating brake.Voltage transformer 5 belongs to open circuit isolates the equipped equipment of clutch, be installed on transformer substation side, as unexpected combined floodgate suddenly in the judgement of live wire road situation after 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 obtained mutually by zero of star wiring, electrical shock protection current setting is by avoiding transformer station to the uneven stray electrical current opening circuit between isolation clutch installation place, this programme is got 10 ~ 20mA, protection electric measurement signal need amplify processing.Open circuit and isolate configurable distribution line protection in the control unit of protection on the spot 6 of clutch, as: overcurrent protection and reclosing etc.

With reference to Fig. 5, the electrical shock protection function of functional module 60 of protecting on the spot control unit 6 is because " transformer substation switch quantity of state " condition does not possess in the normal transmission operation situation of transformer station's feeder switch cabinet, and without separating brake command signal F output, electrical shock protection is deactivated; Jin Dang transformer station feeder cabinet is " transformer substation switch quantity of state " conditions being possessed under power transmission ruuning situation not, 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 ", in this explanation, for ease of narration and understanding, adopt imitative logical program block diagram form embody and describe.

Open circuit and isolate circuit breaker 1 function of clutch and isolator 2 functions according to theme purposes demand, isolator 2 minute, feed motion is set to and circuit breaker 1 adaptive model, that is: after circuit breaker 1 separating brake, disjunction isolator 2 automatically after the time delay Tg time, hand timesharing is without time delay; Automatically isolator 2 in advance closes before circuit breaker 1 closes a floodgate; judge that it gets togather and through time delay Tc, Tc time delay escapes a reclosing cycle, according to area protection definite value overall plan, determine; this example is got the combined floodgate that circuit breaker 1 is carried out at 5-10 rear second, and it closes a floodgate needs through locking B.This logic guarantees that their action locking meets and prevents on-load mistake drawing disconnecting link rule request, this locking is electric blocking, at the isolation clutch that opens circuit, mechanically also meet this locking requirement, that is: isolator 2 minute, combined floodgate condition is that circuit breaker 1 must allow at open position, circuit breaker 1 when closing position, forbid isolator 2 minute, closing operation.In addition, considering opens circuit isolates the checking experiment needs of clutch, now isolator 2 is not followed circuit breaker 1 interlock deciliter automatically, the operating power of the operating power of isolator 2 and circuit breaker 1 is divided and is arranged, control separately, electromagnetic clutch 3 separation when isolator 2 non-transformer, electromagnetic clutch 3 only at circuit breaker 1 in gate-dividing state, and have 2 deciliters instruction time sides of interlock isolator to engage, but anti-incorrect manipulation deadlock function is still constant.Time delay Tg considers that the isolation clutch that opens circuit disposes in auxiliary feeder protection situation; its protection action tripping operation belongs to line fault tripping operation; open circuit and isolate circuit breaker 1 tripping operation of clutch; isolator 2 can not separating brake; the overall time considers to be not less than 5-6 minute by " avoiding send a by force+surplus of reclosing cycle+3 minute ", and this example adopts Tg=8 ~ 10 minute.Although if when not configuring auxiliary feeder protection or configuration but not enabling, just the Tg time can shorten, as: coordinate with transformer station protection for feed line reclosing, can be taken as 5 ~ 10 seconds etc.

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 unconditional separating brake of carrying out of circuit breaker 1 while obtaining separating brake instruction F, circuit breaker 1 separating brake automatically performs separating brake by Tg time delay isolator 2, or when circuit breaker 1 gate-dividing state, receive when separation in one's hands has output from the instruction AND gate of device 2 and implement separating brakes without time delay isolator 2, " circuit breaker 1 co-bit " in 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 every device, obtain reclosing command H and circuit breaker 1 and when open position " with door " has output, implement in advance isolator 2 and close a floodgate, or circuit breaker 1 receives under 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 " in 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 reception every device can not false switching between 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 to anticipation before isolator 2 divide-shut brakes, that is: motor is prepared to close or before separating brake implements, and distinguishes that isolator 2 is in closing a floodgate or during gate-dividing state, automatically stopping machine operation; Only at motor, prepare to close or before separating brake implements, distinguish that isolator 2 really when separating brake or "on" position, 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 controls instruction and the detailed annotation of motor steering workflow is: when isolator 2 is received reclosing command, flow nodes 10 is carried out virtual condition judgement by sensing flow nodes 20, if isolator 2 co-bit flow nodes hold to 120 end, if isolator 2 reality flow nodes when dividing position proceeds to 30, flow process 30 is implemented electromagnetic clutch 3 and is engaged, electromagnetic clutch 3 engages follow-up continuous flow nodes 40 and carries out motor forward rotation, electric machine rotation isolator 2 closes a floodgate, after isolator 2 closes a floodgate and puts in place, flow nodes 50 is routed to flow nodes 60 electromagnetic clutch 3 separation, after electromagnetic clutch 3 is separated, flow nodes is to 120 terminations, flowchart process when isolator 2 is received separating brake instruction is similar with combined floodgate, and separating brake flow nodes comprises 70,80,90,100,110.

With reference to Fig. 8; acquisition module 8 comprises: 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 form the fundamental of anti-power transmission protection main logic functional module 70; also there is in addition station end manual mode operation and remote control function; wherein bypass replacement send quantity of state 85 for optional amount; Electric Power Network Planning is phased out hospital bus bar wiring pattern; generally can not relate to, only as specific demand, consider.

With reference to Fig. 8 and Figure 10, there is stream to differentiate that 86 electrical measurement takes from the current transformer in feeder cabinet, the size of operating value is avoided sky and is zeroized and float electric current, 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 through 70 programmings of anti-power transmission protection main logic device; 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 power supply of line disconnection Ce Fansong transformer station is also implemented electrical isolation, or the isolation clutch that makes before power transmission to open circuit closes 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 anti-power transmission protection main program 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 isolation clutch 2 should not follow action, therefore checking experiment quantity of state 84 is also made as to barring condition.Open circuit after isolation clutch divide-shut brake starts whether carry out actual act, depend on anti-power transmission protection main logic.

With reference to Figure 10; the logical operation instruction 72 of the output of anti-power transmission 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 surpass after the time delay Tf that adjusts and protect on the spot the voltage monitoring amount 52 of control unit 6 outputs by " logical AND " output separating brake instruction 72F, making to open circuit and isolate 1 ~ 2 separating brake of clutch.Or without time delay transformer station, hold manual separating brake or remote control separating brake as required.The condition of its reclosing command 72H is: do not have under the prerequisite of closing locking instruction 72B, without time delay transformer station end is manual, closes a floodgate or remote control combined floodgate as required, and output reclosing command 72H, 1 ~ 2 of the isolation clutch that makes to open circuit closes a floodgate.The disable condition that its blocking order 72B implements separating brake instruction 72F 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 to have output; 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 in closing locking 72B is the electric shock failure locking signal B that protects on the spot control unit 6 functional modules 60 related, i.e. electrical shock protection 42 has output.Be specially: during transformer station's feeder cabinet switch and isolation switch separating brake, opening circuit isolation clutch should be in interlock gate-dividing state, if open circuit around here, isolation clutch surprisingly closes a floodgate in live wire road, 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 in circuit outside, electrical shock protection 42 can not sense, so the fault that sensed in such cases can be determined in station during switch cubicle, electrical shock protection 42 action outputs, send immediately on the one hand separating brake instruction F, send on the other hand closing locking instruction B simultaneously.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 "+" sending by force the time for three minutes "+" 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 is got 8-10 minute.The detailed annotation of anti-power transmission protection main logic is: one of feeder cabinet switch state 82 or disconnecting link quantity of state 83 AND gate when dividing 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 after time delay Tf simultaneously, AND gate has output resume to carry out separating brake, output separating brake instruction 72F, or without time delay, do not judge whether line side has voltage to implement to open circuit and isolate clutch separating brake while receiving the instruction of remote manual control separating brake yet, but the prerequisite of its separating brake instruction 72F output is without disable condition, be 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 when having remote control reclosing command or manually controlling one of reclosing command, OR-gate has reclosing command output 72H, 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 feeder cabinet transmission test process is closed a floodgate line voltage distribution is introduced to feeder cabinet.Protecting on the spot the separating brake instruction F of control unit 6 functional module 60 outputs is instruction of the same race with the separating brake instruction 72F that station end protection control unit 7 sends, and all by making to open circuit, isolates 1 ~ 2 separating brake of clutch; Protecting on the spot control unit 6 the closing locking instruction B exporting and the blocking order 72B that station end protection control unit 7 sends is instruction of the same race, all by forbidding opening circuit, isolates 1 ~ 2 of clutch and closes a floodgate.Protect on the spot control unit 6 function logic 60 and with the opposite joining relation of anti-power transmission protector main logic device 70 as shown in Figure 4.Electrical shock protection 42Jin transformer station feeder cabinet is not under power transmission prerequisite, electric shock fault instantaneous protection and have electricity to monitor, fault-free time delay Ty protection, that is: open circuit and isolate 1 ~ 2 unexpected combined floodgate in live wire road of clutch, sense while there is electric shock fault 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, by avoiding transformer station to distribution line unsymmetrical current between outlet shaft tower, this example is got 10 ~ 20mA, in fact after processing by main logic 70, electrical shock protection 42 substantially use less than, while protecting on the spot interior the monitored voltage 52 of control unit 6 to have output, after time delay Ty, participate in anti-power transmission 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, avoids shaking interference, is taken as 0.5-1S.

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 associated with automation of transformation substations equipment, can be because affecting circuit power transmission by remote control, for this reason, this programme is except having configured remote control operation-interface, the main logic device 70 of Hai Dui transformer station end protection control unit 7 carries out " interlock is closed a floodgate " functional programming, this " interlock close a floodgate " logic is: if the isolation clutch that opens circuit during transformer station's feeder cabinet switch combined floodgate power transmission 1 ~ 2 in open position, through time delay Th, make its combined floodgate 82Wei transformer station feeder cabinet switch "on" position amount, 83Wei transformer station feeder cabinet isolation switch "on" position amount, 1 isolates 1 ~ 2 open position quantity of state of clutch for opening circuit, after time delay Th, send reclosing command.The interlock combined floodgate logical time delay Th that isolates clutch that opens circuit considers the constraint there is no need; after pressing the operation of feeder cabinet power transmission, link as early as possible; can consider the factor of circuit " protection transmission lead to add simulated failure electric parameters time "+" nargin " of feeder cabinet switch when closing position; this example is got 0.5 ~ 1 minute, and this time can be cancelled.The close a floodgate logical description that links of isolation clutch and feeder cabinet switch that opens circuit is: feeder cabinet switch state 82, disconnecting link quantity of state 83 are all at closing position, and open circuit, to be in open position quantity of state be 1 o'clock to isolation clutch, and three conditions of AND gate meet by time delay Th output simultaneously implements the disconnected combined floodgate every device.The high-voltage electriferous display locking device of transformer station's feeder cabinet is realized and being connected with misoperation-proof locking device, possessed by microcomputer anti-error program and lockset control cubicle door opening technology, but by " unlocking tool ", still can open charged cabinet door and cause electric shock accidents, " toll breakdown ".In this programme, considered the anti-warning safeguard measure of tolling breakdown; once 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 is to avoid taking on unnecessary separating brake ，Ke loop " tolling breakdown defencive function drops into " diverter switch or to be 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 meet simultaneously.Illustrate: in fact its electric control loop is exactly that three contacts are series in controlled breaker open operation control loop; In example, consider that two-way output ，Yi road controls the isolation clutch that opens circuit, feeder cabinet or upper level switch are controlled in another road, specifically according to scene, need to use.

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 380V motor; Electromagnetic clutch 3 is direct current 220V or alternating current 220V, and motor and electromagnetic clutch power match, 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's end protection control unit 7 by this programme design editor.

Specific embodiment of the utility model is also non exhaustive, and those skilled in the art carry out without creative work copy and improve should belong to the scope that the utility model claim is protected.

Claims (2)

1. an anti-power transmission protector, it is characterized in that, it comprises: 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 and protect on the spot control unit, protect on the spot control unit to form secondary device, the circuit breaker of described primary equipment, isolator and threephase current transformer primary side are connected in series, by transformer substation side, to line side, put in order and be 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 protect control unit to be connected with secondary device on the spot, by sampling unit, hold protection control unit to be electrically connected to transformer station, transformer station's end protection control unit is electrically connected to the anti-power transmission protection of composition transformer station feeder cabinet with protecting on the spot control unit, and transformer station's end protection control unit of described transformer station feeder cabinet is electrically connected to power module.

2. a kind of anti-power transmission protector 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 to protecting on the spot control unit.

Images