CN103368169B - A kind of anti-power transmission protector - Google Patents
A kind of anti-power transmission protector Download PDFInfo
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- CN103368169B CN103368169B CN201310281635.9A CN201310281635A CN103368169B CN 103368169 B CN103368169 B CN 103368169B CN 201310281635 A CN201310281635 A CN 201310281635A CN 103368169 B CN103368169 B CN 103368169B
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- 239000012212 insulator Substances 0.000 claims description 4
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- 238000010586 diagram Methods 0.000 description 10
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- 230000000903 blocking effect Effects 0.000 description 7
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- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
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- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
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- 244000144983 clutch Species 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009429 electrical wiring Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
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Abstract
A kind of anti-power transmission protector, be characterized in, comprise open circuit isolation clutch, transformer substation end protecting control unit, sampling unit, power module, open circuit isolation clutch comprises by circuit breaker, isolator, threephase current transformer, primary equipment and the in-situ protection control unit of voltage transformer composition are secondary device, the circuit breaker of primary equipment, isolator and threephase current transformer primary side are connected in series, the voltage transformer primary side of primary equipment is in parallel with threephase current transformer, the threephase current transformer secondary side of primary equipment, voltage transformer secondary side and secondary device on the spot control unit are connected, be electrically connected with transformer substation end protecting control unit by sampling unit, transformer substation end protecting control unit is electrically connected with in-situ protection control unit and forms the anti-power transmission of substation feeder cabinet and protect, and the transformer substation end protecting control unit of substation feeder cabinet is electrically connected with power module.Have rational in infrastructure, reliable in action, the advantage such as can exterminate root and branch the hidden peril of accidents.
Description
Technical field
The present invention relates to electrical power distribution electrical domain, be a kind of anti-power transmission protector, be mainly applicable to the prevention of distribution network transformer substation feeder cabinet accident of human electric shock, avoid accident of human electric shock occurs.
Background technology
Along with the development of electrical network, the handle rate of 35kV and following distribution line progressively increases, and this, while raising power supply reliability, too increases the potential safety hazard of distribution line to substation feeder cabinet reverse charge.In addition, user is power autonomous also may send to circuit is counter.Described distribution line handle refers to: distribution line conventional connections mode is powered 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 handle switch with another transformer station and realize being connected, and can change powered by another transformer station when this transformer station has a power failure.
The measure of the anti-power transmission personal injury of current strick precaution feeder cabinet mainly leans on the management means such as system, code to be main constraint, and the implementation capacity of this management means is weak, strick precaution weak effect, fundamentally can not stop personal electric shock casualty accident.Also the station (institute) had adopts and is connected with misoperation-proof locking device at substation feeder switch cubicle mounting strap pyroelectric monitor instrument, switch cabinet door implements electric locking, this is a kind of technical measures, this technological means is controlled by the unlatching of anti-error lock switch cabinet door, the cabinet door opening electricity " can be prevented ",, still there are two kinds of unsafe factors: one is utilize " unlocking tool " still artificially can open cabinet door by unlocking; Although two is open cabinet door not have electricity at that time, 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 ", the attribute that this technical measures have " technology+management ", but do not have linkage function, automaticity low, and due to this measure relate to be distribution specialized department management controller switching equipment, different from the converting equipment management profrssion of transformer station, need the close fit that distribution, power transformation, scheduling, management etc. are multidisciplinary, multi-specialized, even if like this, not only exhaust the people and drain the treasury, and account for leading because it manages composition, or eliminate Bu Liaofan power transmission accident potential.Thus, though not cutting off measure or having partition equipment not form interlock is the root place of causing personal electric shock casualty accident.The circuit breaker that current electrical network uses and isolator, or claim isolation switch to belong to the equipment of two kinds of difference in functionalitys, use of often will arranging in pairs or groups between the two, although need collocation to use, 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 object of the invention is, overcome the deficiencies in the prior art, provide a kind of rational in infrastructure, reliable in action, the anti-power transmission protector of the one that can exterminate root and branch the hidden peril of accidents.
Realizing the technical scheme that the object of the invention adopts is, a kind of anti-power transmission protector, it is characterized in that, it comprises: open circuit isolation clutch, transformer substation end protecting control unit, sampling unit, power module, described open circuit isolation clutch comprises by circuit breaker, isolator, threephase current transformer, primary equipment and the in-situ protection control unit of voltage transformer composition are secondary device, the circuit breaker of described primary equipment, isolator and threephase current transformer primary side are connected in series, to put in order to line side by transformer substation side and be followed successively by voltage transformer, threephase current transformer, circuit breaker, isolator, the voltage transformer primary side of described primary equipment is in parallel with threephase current transformer in the outer end of threephase current transformer primary side, 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, be electrically connected with transformer substation end protecting control unit by sampling unit, transformer substation end protecting control unit is electrically connected with in-situ protection control unit and forms the anti-power transmission of substation feeder cabinet and protect, and the transformer substation end protecting control unit of described substation feeder cabinet is electrically connected with power module.
The isolator of described open circuit isolation clutch 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 in-situ protection control unit.
Anti-power transmission protector of the present invention, owing to adopting open circuit isolation clutch, transformer substation end protecting control unit, sampling unit, power module, open circuit isolation clutch comprises the primary equipment that is made up of circuit breaker, isolator, threephase current transformer, voltage transformer and in-situ protection 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 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 parallel with threephase current transformer in the outer end of threephase current transformer primary side, and the threephase current transformer secondary side of primary equipment, voltage transformer secondary side and secondary device on the spot control unit are connected; Be electrically connected with transformer substation end protecting control unit by sampling unit; transformer substation end protecting control unit is electrically connected with in-situ protection control unit and forms the anti-power transmission of substation feeder cabinet and protect, and the transformer substation end protecting control unit of described substation feeder cabinet is electrically connected with power module.Control unit can send logical process signal to circuit breaker on the spot, isolator controls, and by control unit and transformer substation end protecting control unit contact on the spot, and obtain power supply and state information amount, form integral inverted power transmission manipulation logic, isolator and circuit breaker is made to realize linking, open circuit isolation clutch is electrically connected with transformer substation end protecting control unit, transformer substation end protecting control unit is electrically connected the anti-power transmission of substation feeder cabinet formed and protects with in-situ protection control unit, realize linking with the switch of feeder cabinet, form the anti-power transmission protection of circuit, wherein: the threephase current transformer secondary electrical measurement of open circuit isolation clutch, voltage transformer secondary electrical measurement, the series connection of substation feeder cabinet switch state forms feeder cabinet electrical shock protection, substation feeder cabinet has pyroelectric monitor amount, substation feeder cabinet door switch position quantity, substation feeder cabinet to toll breakdown the series connection of defencive function investing method controlled quentity controlled variable to form substation feeder cabinet and toll breakdown protection, have rational in infrastructure, reliable in action, can avoid the advantages such as security incident occur.
Accompanying drawing explanation
Fig. 1 is anti-power transmission protector structural representation;
Fig. 2 is the open circuit isolation linkage device structure schematic diagram of anti-power transmission protector;
Fig. 3 is electrical shock protection principle schematic;
Fig. 4 is that electrical shock protection logic function docks schematic diagram with the protection of anti-power transmission;
Fig. 5 is isolator 2 and circuit breaker 1 self-adapting linkage logic diagram;
Fig. 6 is that isolator 2 manipulates motor and divides, closes and turn to operating diagram;
Fig. 7 is that isolator 2 manipulates 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 is the interlock combined floodgate logic diagram of open circuit isolation clutch and substation feeder cabinet switch;
Figure 12 is that relay protective scheme schematic diagram tolled breakdown by substation feeder switch cubicle.
Embodiment
See figures.1.and.2, the anti-power transmission protector of one of the present invention comprises: open circuit isolation clutch, transformer substation end protecting control unit 7, sampling unit 8, power module 9.Described open circuit isolation clutch comprises motor drive mechanism 11 and the mechanical latching parts 12 of circuit breaker 1, isolator 2, electromagnetic clutch 3, current transformer 4, voltage transformer 5, in-situ protection control unit 6 and circuit breaker; the motor drive mechanism 21 of isolator and mechanical locking device 22; functional module 60 in in-situ protection control unit 6 and on the spot control line 61 and outreach control line 62; the remote controller on the spot 13 of circuit breaker 1, and the manual lever 23 of isolator 2 forms.The primary equipment be made up of circuit breaker 1, isolator 2, threephase current transformer 4, voltage transformer 5 and in-situ protection control unit 6 are 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 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 side of described primary equipment is in parallel with threephase current transformer 4 in the outer end of threephase current transformer 4 primary side, and threephase current transformer 4 secondary side of described primary equipment, voltage transformer 5 secondary side and secondary device on the spot control unit 6 are connected; Be electrically connected with transformer substation end protecting control unit 7 by sample line 81 by described sampling unit 8; described transformer substation end protecting control unit 7 to be electrically connected with in-situ protection control unit 6 and to form the anti-power transmission of substation feeder cabinet by outreaching control line 62 and protect, and described power module 9 is electrically connected with the transformer substation end protecting control unit 7 of substation feeder cabinet by power line 91.The isolator 2 of described open circuit isolation clutch comprises: the body of isolator 2, the motor drive mechanism 21 of isolator, 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 in-situ protection control unit 6.Transformer substation end protecting control unit 7 has functional module 70.Power module 9 provides power supply by power line 91 to transformer substation end protecting control unit 7, in-situ protection control unit 6 and open circuit isolation clutch thereof.The switch of sampling unit 8 pairs of substation feeder cabinets, disconnecting link, checking experiment mode, bypass turn for informations such as modes, and participate in logic through the functional module 70 that sample line 81 passes to transformer substation end protecting control unit 7
aMP.AMp.Ampprocess, implements interlock through outreaching control line 62 pairs of open circuit isolation clutchs after process.
With reference to Fig. 2, concrete structure and the logical relation of open circuit isolation clutch are described below:
In open circuit isolation clutch primary equipment loop, circuit breaker 1 is connected with cascade 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 connect successively by from transformer substation side to line side, and order is: voltage transformer 5, threephase current transformer 4, circuit breaker 1, isolator 2; The linear quadratic control equipment of open circuit isolation clutch comprises the secondary side output variable etc. of the control element of in-situ protection controller 6, current transformer 4 and voltage transformer 5, and these secondary loop information amounts all introduce the logic that in-situ protection control unit 6 participates in functional module 60
aMP.AMp.Ampprocess, the result of logical process accesses the motor drive mechanism 11 of circuit breaker by control line 61 on the spot, the motor drive mechanism 21 of isolator, electromagnetic clutch 3 control.Contact and obtain power supply and state and divide-shut brake by outreaching control line 62 and transformer substation end protecting control unit 7 and manipulate command information, form the protection of integral inverted power transmission and manipulate logic
aMP.AMp.Amp.The mechanical part of the motor drive mechanism 21 of isolator realizes linking by the motor drive mechanism 11 of electromagnetic clutch 3 with circuit breaker, and this interlock leans 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 removes its mechanical latching to isolator 2 when open position, in addition, secondary control loop also has electric blocking.The remote controller 13 of circuit breaker 1 can manipulate circuit breaker 1 on the spot, when clutch 3 leave and mechanical locking device 22 unlocking available isolator 2 manual lever 23 carry out the manual operation of isolator.The object arranging electromagnetic clutch 3 is for ensureing the repetition locking that the reliability that isolator 2 links is taked, realizing 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 open circuit isolation clutch coordinates with transforming plant protecting control unit 7, complete and block the anti-power transmission power supply of circuit and implement electrical isolation, outreach control line 62 by substation feeder switch cubicle not power transmission time state information be sent to in-situ protection control unit 6, the voltage 51 of its functional module 60 pairs of voltage transformers 5 measures, through time delay Ty(note when confirming that circuit truly has reverse electrical source: time delay Ty mainly considers that stabilization is disturbed, can be taken as 0.5 ~ 1 second) send separating brake instruction 52, open circuit isolation clutch separating brake is driven according to action logic, otherwise, will not be linked separating brake, at switch cabinet of converting station not power transmission run duration, if the magnitude of current 41 of threephase current transformer 4 has electric current, then be judged to be that circuit has sent voltage to transformer station is counter and has there occurs electric shock accidents, the phase current 42Lx of electrical shock protection or zero-sequence current 42Lo sends protection instruction 42 immediately and drives open circuit to isolate clutch enforcement separating brake.Voltage transformer 5 belongs to the equipped equipment of open circuit isolation clutch, be installed on transformer substation side, suddenly close a floodgate in the judgement of live wire road situation as unexpected after open circuit isolation clutch separating brake, threephase current transformer 4 also belongs to the equipped equipment of open circuit isolation clutch, its three-phase current 42Lx takes from A respectively, B, this phase of C, zero-sequence current 42Lo is then obtained mutually by zero of star wiring, electrical shock protection current setting is by the uneven stray electrical current avoided between transformer station to open circuit isolation clutch installation place, this programme gets 10 ~ 20mA, protection electric measurement signal need amplify process.Configurable distribution line protection in the in-situ protection control unit 6 of open circuit isolation clutch, as: overcurrent protection and reclosing etc.
With reference to Fig. 5, the electrical shock protection function of the functional module 60 of in-situ protection control unit 6 is not because " transformer substation switch quantity of state " condition possesses in the normal transmission operation situation of substation feeder switch cubicle, and export without separating brake command signal F, electrical shock protection is deactivated; Only when " transformer substation switch quantity of state " conditions being possessed under substation feeder cabinet not power transmission ruuning situation, there is separating brake command signal F to export, while driving open circuit isolation clutch separating brake, export closing locking signal B, forbid that open circuit isolation clutch closes a floodgate.
With reference to Fig. 2 and Fig. 5, the action logic such as "AND", "or", " forbidding " that the secondary circuit electrical wiring of the present embodiment is switching value contact series, parallel, series-parallel connection connects to form every part, for ease of describing and understanding in this explanation, imitative logical program block diagram format is adopted to embody and describe.
Circuit breaker 1 function of open circuit isolation clutch and isolator 2 function are according to theme purposes demand, isolator 2 point, feed motion is set to and circuit breaker 1 adaptive model, that is: after circuit breaker 1 separating brake, automatic disjunction isolator 2 after the time delay Tg time, hand timesharing is without time delay; Automatically close before circuit breaker 1 closes a floodgate isolator 2 in advance; judge that it gets togather and escapes a reclosing cycle through time delay Tc, Tc time delay, determine according to area protection definite value overall plan; this example gets the combined floodgate that circuit breaker 1 is carried out at 5-10 rear second, and its combined floodgate need through locking B.This logic ensures that their action locking meets and prevents on-load drawing disconnecting link rule request by mistake, this locking is electric blocking, open circuit isolation clutch mechanically also meet this locking requirement, that is: isolator 2 point, combined floodgate condition is that circuit breaker 1 must allow at open position, circuit breaker 1 then forbid when closing position isolator 2 point, closing operation.In addition, consider the checking experiment needs of open circuit isolation clutch, now isolator 2 does not follow circuit breaker 1 interlock deciliter automatically, the operating power of isolator 2 and the operating power of circuit breaker 1 are provided separately, independent control, when isolator 2 non-transformer, electromagnetic clutch 3 is separated, and electromagnetic clutch 3 is only in gate-dividing state at circuit breaker 1, and have interlock isolator 2 deciliters instruction time sides to engage, but anti-incorrect manipulation deadlock function is still constant.Time delay Tg is under considering that open circuit isolation clutch is configured with auxiliary feeder protection situation; the tripping operation of its protection act belongs to line fault tripping operation; the circuit breaker 1 of open circuit isolation clutch trips; isolator 2 then can not separating brake; overall time is considered to be not less than 5-6 minute by " avoid+3 minutes reclosing cycle and send by force+surplus ", and this example adopts Tg=8 ~ 10 minute.If although when not configuring auxiliary feeder protection or configure but do not enable, then the Tg time just can shorten, as: protect reclosing to coordinate with substation feeder, can be taken as 5 ~ 10 seconds.
With reference to Fig. 5, the divide-shut brake manipulation command information that open circuit isolation clutch receives and its action behavior are explained in detail and are: open circuit is isolated and directly acted on circuit breaker 1 when clutch obtains separating brake instruction F and unconditionally perform separating brake, separating brake is automatically performed through Tg time delay isolator 2 after circuit breaker 1 separating brake, or receive separation in one's hands to have during output from the instruction AND gate of device 2 and implement separating brake when circuit breaker 1 gate-dividing state without time delay isolator 2, " circuit breaker 1 co-bit " in figure forbids that isolator 2 separating brake considers that the auxiliary contact of circuit breaker 1 is reliably changed, and prevents isolator 2 misoperation, disconnected obtain reclosing command H and circuit breaker 1 to have during output at open position " with door " and implements the 2-in-1 lock of isolator in advance every device, or circuit breaker 1 receives hand and closes the instruction " with door " of isolator 2 and have to export and implement the 2-in-1 lock of isolator under prerequisite when open position, implement circuit breaker 1 behind the door through Tc and " forbidding " after isolator 2 indeed closes a floodgate to close a floodgate, " circuit breaker 1 co-bit " in figure forbids that the 2-in-1 lock of isolator considers that the auxiliary contact of circuit breaker 1 is reliably changed, prevent isolator 2 misoperation, " separating brake instruction F " forbids that circuit breaker 1 closes a floodgate is consider that disconnected reception every device can not false switching between separating brake order period.
With reference to Fig. 2 and Fig. 6, carry out anticipation before isolator 2 divide-shut brake to its action behavior and current state, that is: motor prepares to close or before separating brake enforcement, when distinguishing that isolator 2 has been in combined floodgate or gate-dividing state, automatically stop machine operation; Only prepare to close or before separating brake enforcement, distinguish isolator 2 really when separating brake or "on" position at motor, then proceed to link, that is: electromagnetic clutch joint → electric machine rotation → electromagnetic clutch is separated.
With reference to Fig. 7, electromagnetic clutch 3 is described with the motor drive mechanism 21 electric machine rotation matching relationship of isolator.Isolator 2 manipulates instruction and motor steering workflow and explains in detail and be: when isolator 2 receives reclosing command, sensing flow nodes 20 is carried out virtual condition judgement by flow nodes 10, if isolator 2 is in co-bit, flow nodes is held and is terminated to 120, if isolator 2 is actual when being in point position, flow nodes proceeds to 30, flow process 30 is implemented electromagnetic clutch 3 and is engaged, electromagnetic clutch 3 engages follow-up continuous flow nodes 40 to carry out motor and rotates forward, the 2-in-1 lock of electric machine rotation isolator, after the 2-in-1 lock of isolator puts in place, flow nodes 50 is routed to flow nodes 60 electromagnetic clutch 3 and is separated, electromagnetic clutch 3 is separated rear flow nodes and stops to 120, flowchart process when isolator 2 receives separating brake instruction with close a floodgate similar, separating brake flow nodes comprises 70,80,90,100,110.
With reference to Fig. 8; acquisition module 8 comprises: feeder cabinet switch; namely the quantity of state 82 of circuit breaker 1, feeder cabinet isolation switch quantity of state 83, checking experiment mode quantity of state 84, bypass replacement send quantity of state 85, have 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 station end manual mode operation and remote control function in addition; wherein bypass replacement send quantity of state 85 for optional amount; Electric Power Network Planning phases out hospital bus bar wiring patterns; generally can not relate to, only consider as specific demand.
With reference to Fig. 8 and Figure 10, have the electrical measurement of stream discriminating 86 to take from current transformer in feeder cabinet, the size of operating value is avoided sky and to be zeroized drift electric current, and this example is set to 30-50mA.
With reference to Fig. 8 ~ Figure 10; transformer substation end protecting control unit 7 obtains state information amount 82 ~ 85 and the electrical measurement amount of information 86 of sampling unit 8 by sample line 81; and programme through anti-power transmission protection main logic device 70; output function instruction 72; operational order 72 is delivered to in-situ protection control unit 6 through outreaching control line 62; 1 ~ 2 execution that in-situ protection control unit 6 drives open circuit to isolate clutch divides or feed motion; the power supply of cutting line trackside Fan Song transformer station also implements electrical isolation, or makes open circuit isolate clutch before power transmission to close a floodgate in advance.The logical operation instruction 72 that transformer substation end protecting control unit 7 exports 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 with one of isolation switch quantity of state 83 two quantity of states at open position and protects main program; but be subject to stream and differentiated that electrical measurement 86, bypass turn for quantity of state 85 locking; and its switch may repeatedly deciliter transmission test during the test of feeder cabinet switch maintenance; this situation open circuit isolation clutch 2 should not follow action, therefore checking experiment quantity of state 84 is also set to barring condition.Whether perform actual act after open circuit isolation clutch divide-shut brake starts, anti-power transmission protection main logic be depended on.
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: under not having the prerequisite of separating brake blocking order 72B; one of the quantity of state 82 or feeder cabinet isolation switch quantity of state 83 of feeder cabinet switch are at open position; and the voltage monitoring amount 52 exported with in-situ protection control unit 6 after exceeding the time delay Tf that adjusts exports separating brake instruction 72F by " logical AND ", open circuit is made to isolate 1 ~ 2 separating brake of clutch.Or as required without the manual separating brake of time delay transformer substation end or remote control separating brake.The condition of its reclosing command 72H is: under not having the prerequisite of closing locking instruction 72B, closes a floodgate or remote control combined floodgate as required, exports reclosing command 72H, make open circuit isolate 1 ~ 2-in-1 lock of clutch without the manual control of time delay transformer substation end.Its blocking order 72B to the disable condition that separating brake instruction 72F implements is: electrical measurement 86 measured value exceedes set point to have stream to differentiate, or the bypass replacement of this circuit send quantity of state 85 to have output; To the barring condition that reclosing command 72H implements be: feeder cabinet switch transmission test mode quantity of state 84 has output or transformer substation end protecting 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 involved by in-situ protection control unit 6 functional module 60, and namely electrical shock protection 42 has output.Be specially: during substation feeder cabinet switch and isolation switch separating brake, open circuit isolation clutch should be in interlock gate-dividing state, if the isolation of open circuit around here clutch surprisingly closes a floodgate in live wire road, then electrical shock protection 42 senses transformer station and breaks down, because substation feeder cabinet switch or isolation switch are at open position, fault current can not be provided, and for the fault outside circuit, electrical shock protection 42 can not sense, so when fault sensed in such cases can determine switch cubicle in standing, electrical shock protection 42 action exports, send separating brake instruction F immediately on the one hand, send closing locking instruction B on the other hand simultaneously.Interlock separating brake delay time Tf considers two aspect factors, and one is avoid circuit permanent fault " protection act trip time "+" reclosure time "+" protecting the trip time of action again "+" sending the time by force in three minutes "+" nargin "; Two is to exceed " operation opening time "+" pull out handcart and do safety measure "+" opening switch cubicle "-" nargin ".Comprehensive two aspect factors, this example gets 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 point position has output start-up study Tf, if the line side of in-situ protection control unit 6 has reverse charge to press 52 after time delay Tf simultaneously, then AND gate has output resume to perform separating brake, export separating brake instruction 72F, or do not judge whether line side has voltage to implement open circuit isolation clutch separating brake without time delay when receiving the instruction of remote manual control separating brake yet, but the prerequisite that its separating brake instruction 72F exports is without disable condition, namely load current differentiate 86 and bypass turn and be 0 for quantity of state, the making process of open circuit isolation clutch has the OR-gate in a period of time of remote control reclosing command or Non-follow control reclosing command to have reclosing command to export 72H, reclosing command 72H controls by checking experiment state locking 84 and other lockings B, prevents feeder cabinet transmission test process interrupt road from isolating clutch misoperation combined floodgate and line voltage distribution is introduced feeder cabinet.The separating brake instruction F that in-situ protection control unit 6 functional module 60 exports is instruction of the same race with the separating brake instruction 72F holding protecting control unit 7 to send that stands, 1 ~ 2 separating brake all will open circuit being made to isolate clutch; The closing locking instruction B that in-situ protection control unit 6 exports is instruction of the same race with the blocking order 72B holding protecting control unit 7 to send that stands, and all will forbid 1 ~ 2-in-1 lock of open circuit isolation clutch.The function logic 60 of in-situ protection control unit 6 and with the opposite joining relation of anti-power transmission protector main logic device 70 as shown in Figure 4.Electrical shock protection 42 is only under the non-power transmission prerequisite of substation feeder cabinet, electric shock fault instantaneous protection and have electricity monitor, fault-free time delay Ty protects, that is: 1 ~ 2 of open circuit isolation clutch surprisingly close a floodgate in live wire road, sense when there is electric shock fault with zero second time instantaneous operation excision power supply, be configured with: phase overcurrent protection 42Lx and zero sequence capacitance current protection 42Lo, this electrical shock protection fault curre is small, by avoiding distribution line unsymmetrical current between transformer station to outlet shaft tower, this example gets 10 ~ 20mA, after processing actually by main logic 70, electrical shock protection 42 substantially with less than, when the voltage 52 of monitoring in in-situ protection control unit 6 has output, participate in after time delay Ty in anti-power transmission protector main logic 70 through locking excision power supply.Threephase current transformer 4, voltage transformer 5 are open circuit isolation clutch and are equipped with equipment, and voltage transformer 5 is installed by transformer substation side.Have voltage prison side to participate in main logic 70 through time delay Ty output 52 to programme, 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, open circuit isolation clutch is as the interlocking equipment of substation feeder cabinet switch, because it belongs to controller switching equipment, generally be not associated with automation of transformation substations equipment, can because circuit power transmission cannot be affected by remote control, for this reason, this programme is except being configured with remote control operation-interface, also " interlock is closed a floodgate " functional programming is carried out to the main logic device 70 of transformer substation end protecting control unit 7, this " interlock close a floodgate " logic is: if 1 ~ 2 of open circuit isolation clutch be in open position during substation feeder cabinet switch combined floodgate power transmission, then it is made to close a floodgate 82 for substation feeder cabinet switch "on" position amount through time delay Th, 83 is substation feeder cabinet isolation switch "on" position amount, 1 is 1 ~ 2 open position quantity of state that clutch is isolated in open circuit, reclosing command is sent after time delay Th.The interlock combined floodgate logical time delay Th of open circuit isolation clutch considers the constraint that there is no need; link as early as possible by after the operation of feeder cabinet power transmission; the factor of the circuit of feeder cabinet switch when closing position " protection transmission is logical adds the simulated failure electric parameters time "+" nargin " can be considered; this example gets 0.5 ~ 1 minute, and this time can be cancelled.The close a floodgate logical description that links of open circuit isolation clutch and feeder cabinet switch is: feeder cabinet switch state 82, disconnecting link quantity of state 83 are all at closing position, and open circuit isolation clutch is when to be in open position quantity of state be 1, through time delay Th exports after three conditions of AND gate meet simultaneously and implement the disconnected combined floodgate every device.High-voltage electriferous display locking device and the misoperation-proof locking device of substation feeder cabinet realize being connected, possess 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 ".Consider in this programme and prevent tolling breakdown warning safeguard measure; once charged cabinet door is forcibly opened; just start electrical shock protection program and clutch separating brake is isolated in open circuit; this is the expansion to anti mis-closedown function; the careful use of this expanded function, to avoid unnecessary separating brake, can be taked " tolling breakdown defencive function to drop into " diverter switch or be controlled in flakes on loop.
With reference to Figure 12, feeder cabinet is tolled breakdown relay protective scheme detailed annotation and is: there is electricity feeder cabinet inside, feeder cabinet door is opened, toll breakdown defencive function in " input ", performs 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; Consider in example that two-way exports, a road controls open circuit isolation clutch, and another road controls feeder cabinet or upper level switch, specifically needs to use according to scene.
The motor drive mechanism of the circuit breaker 1 of described open circuit isolation clutch is spring energy agency, and arc control device adopt vacuum extinction, and circuit breaker 1 and isolator 2 manipulate 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.The protecting control logic of in-situ protection control unit 6 and transformer substation end protecting control unit 7 presses this programme design editor.
Specific embodiments of the invention are also non exhaustive, and what those skilled in the art carried out without creative work copies and improve the scope that should belong to the claims in the present invention protection.
Claims (1)
1. an anti-power transmission protector, it comprises: power module, open circuit isolation clutch, transformer substation end protecting control unit, sampling unit, it is characterized in that, described open circuit isolation clutch comprises circuit breaker, isolator, threephase current transformer, voltage transformer, in-situ protection control unit, described voltage transformer, threephase current transformer, circuit breaker, isolator is primary equipment, in-situ protection control unit is secondary device, the circuit breaker of described primary equipment, isolator and threephase current transformer primary side are connected in series, to put in order to line side by transformer substation side and be followed successively by voltage transformer, threephase current transformer, circuit breaker, isolator, the voltage transformer primary side of described primary equipment is in parallel with threephase current transformer in the outer end of threephase current transformer primary side, and threephase current transformer secondary side, the voltage transformer secondary side of described primary equipment be connected with secondary device in-situ protection control unit, be electrically connected with transformer substation end protecting control unit by sampling unit, transformer substation end protecting control unit is electrically connected with in-situ protection control unit and forms the anti-power transmission of substation feeder cabinet and protect, the isolator of described open circuit isolation clutch 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 in-situ protection control unit, described sampling unit is switch to substation feeder cabinet, disconnecting link, checking experiment mode, bypass turn for mode information, and participates in logic through the functional module that sample line passes to transformer substation end protecting control unit
aMP.AMp.Ampprocess, implements interlock through outreaching control pair open circuit isolation clutch after process.
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| CN103746375A (en) * | 2014-01-15 | 2014-04-23 | 国家电网公司 | Automatic small-power supply removal device |
| CN104614603B (en) * | 2015-01-08 | 2017-04-12 | 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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