CN103618376A - Main change protection locking spare power automatic switching improving method - Google Patents
Main change protection locking spare power automatic switching improving method Download PDFInfo
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- CN103618376A CN103618376A CN201310640487.5A CN201310640487A CN103618376A CN 103618376 A CN103618376 A CN 103618376A CN 201310640487 A CN201310640487 A CN 201310640487A CN 103618376 A CN103618376 A CN 103618376A
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Abstract
The invention discloses a main change protection locking spare power automatic switching improving method under a 110kV intra-bridge wiring manner. The method includes the following steps that when bridge switch power automatic switching is selected, bridge switch position dividing logic is added and effective main change differential motion/ high back-up/ non-electricity-quantity protection opening entering and locking spare power automatic switching is achieved; when incoming line spare power automatic switching is selected, bridge switch position merging logic is added and main change differential motion/ high back-up/ non-electricity-quantity protection opening entering and locking spare power automatic switching fails; under an incoming line spare power automatic switching manner, bridge 710 switch open position logic is added after a main change protection action. According to the main change protection locking spare power automatic switching improving method, under the 110kV intra-bridge wiring manner, the main change protection locking spare power automatic switching improving method can be used for achieving main change protection, only bridge switch power automatic switching is locked and however, incoming line spare power automatic switching is not locked. In addition, secondary impact on the system by a standby power supply due to the motion refusal of a bridge 710 switch is avoided.
Description
Technical field
The present invention relates to a kind of transformer substation spare power automatic switching locking technology, particularly the improving one's methods of main transformer protection locking prepared auto restart under a kind of 110kV internal bridge mode.
Background technology
110kV transformer station adopts internal bridge mode, and bridge switch 710 is in the inner side of inlet wire 701,702 switches, near transformer side.Differential, the high standby of configuration of main transformer high-pressure side and non electrical quantity protection, wherein differential, zero time limit of non electrical quantity, one section of time delay 1.7S of high standby overcurrent jumps corresponding high-pressure side, bridge and low-side switch.The low backup protection of main transformer is overcurrent I segment protect; backup protection as outlet protection I section on 10kV bus and bus; it has two operation time limits; the first time limit 1.1S tripping 10kV bridge switch, second this side of time limit 1.4S tripping 10kV switch, in order to guarantee power supply reliability; installing automatic switching device of standby power supply (only having the total locking of prepared auto restart to open into terminal); can realize 110kV inlet wire and bridge switch prepared auto restart, main transformer and 10kV bridge prepared auto restart, Substation Bus Arrangement is as shown in Figure of description Fig. 1.
Inlet wire one prepared auto restart: when inlet wire 2 702 switches, 7021 disconnecting links, 7023 disconnecting links, bridge 710 switches, 7101 disconnecting links, 7102 disconnecting links are at closing position, inlet wire one 701 switches are in hot stand-by duty (7011,7013 disconnecting link co-bits, 701 switches divide position), be that inlet wire two moves by two main transformers of 702,710 switch band, enable inlet wire one 701 switch prepared auto restarts.
Inlet wire two prepared auto restarts: when inlet wire one 701 switches, 7011 disconnecting links, 7013 disconnecting links, bridge 710 switches, 7101 disconnecting links, 7102 disconnecting links are at closing position, in hot stand-by duty, (702 switches divide position to inlet wire 2 702 switches, 7021,7023 disconnecting link co-bits), be that inlet wire one moves by two main transformers of 701,710 switch band, enable inlet wire 2 702 switch prepared auto restarts.
Bridge switch prepared auto restart: when inlet wire one 701 switches, 7011 disconnecting links, 7013 disconnecting links, inlet wire 2 702 switches, 7021 disconnecting links, 7023 disconnecting links are at closing position, in hot stand-by duty, (710 switches divide position to bridge 710 switches, 7101,7103 disconnecting link co-bits), be that inlet wire one moves by No. 1 main transformer of 701 switch band, inlet wire two moves by No. 2 main transformers of 702 switch band, bridge switch 710 stand-by heats, enable bridge 710 switch prepared auto restarts.
Because digital automatic switching device of standby power supply only can be realized the total locking of outside intake; it is differential/high standby of 110kV transforming plant main transformer/non electrical quantity protection action; by main transformer protection, shield corresponding locking prepared auto restart pressing plate, open into opening into terminal to total locking of 110kV inlet wire and bridge backup auto-activating device.Thereby cause as long as main transformer differential/high standby/non electrical quantity protection action; the inlet wire of locking simultaneously 1, inlet wire 2 702 and bridge 710 switch prepared auto restarts; there is main transformer protection action when single line band is two to be become; prepared auto restart is because being blocked akinesia; the potential safety hazard that causes full station to have a power failure, makes a concrete analysis of as follows
Bridge switch prepared auto restart is analyzed
When No. 1 main transformer differential/high standby/non electrical quantity protection action; tripping 701,101 switches; although bridge switch backup auto-activating device meets entry condition; but main transformer protection is opened into the total locking terminal of backup auto-activating device simultaneously; carry out bridge 710 switch backup auto-activating device electric discharges; thereby locking bridge 710 switch prepared auto restarts, effectively avoided the again impact of system to fault point, guaranteed the normal operation of No. 2 main transformers and load thereof.
When No. 2 main transformer differential/high standby/non electrical quantity protection action; tripping 702,102 switches; same bridge switch backup auto-activating device meets entry condition; but the locking of main transformer protection action simultaneously bridge 710 switch prepared auto restarts; thereby avoided the again impact of system to fault point, guaranteed the normal operation of No. 1 main transformer and load thereof.
Therefore,, under the two operational modes that become of two-wire band, main transformer differential/high standby/non electrical quantity protection action should locking bridge switch prepared auto restart.
Service entrance switch prepared auto restart is analyzed
The inlet wire 2 702 switch prepared auto restarts of take are analyzed as example, its charge condition is: inlet wire 1, bridge 710 switch co-bits, inlet wire 2 702 switches divide position, and 110kV I, II section bus all have pressure, through the time delay of adjusting, complete inlet wire 2 702 switch backup auto-activating devices chargings.
Inlet wire 2 702 switch prepared auto restart entry conditions: 701 switches are without stream, 110kV I, the equal decompression of II section bus.
When No. 2 main transformer differential/high standby/non electrical quantity protection action, tripping 702,710,102 switches, have realized fault point isolation.Because 110kV I section bus still has voltage, inlet wire 2 702 switch prepared auto restarts do not meet entry condition, therefore inlet wire two prepared auto restarts are failure to actuate, No. 1 main transformer and load thereof still can normally move.
When No. 1 main transformer differential/high standby/non electrical quantity protection action, tripping 701,710,101 switches, have realized fault point isolation.Although now inlet wire 2 702 switch prepared auto restarts meet its entry condition, main transformer both sides switch locking simultaneously 110kV inlet wire prepared auto restart is jumped in No. 1 main transformer action, and inlet wire 2 702 switch prepared auto restart akinesias, cause the accident of 110kV transformer station full cut-off to occur.
Therefore,, under the two change of single line band operational mode, locking service entrance switch prepared auto restart is not answered in main transformer differential/high standby/non electrical quantity protection action.
Summary of the invention
The object of the present invention is to provide improving one's methods of a kind of main transformer protection locking prepared auto restart.
The technical solution that realizes the object of the invention is: improving one's methods of a kind of main transformer protection locking prepared auto restart, comprises the following steps:
1.1 when selecting bridge switch to haul oneself willingly into, and adds bridge switch and divide a logic, realizes the protection of main transformer differential/high standby/non electrical quantity and open into locking prepared auto restart effective;
1.2 when selecting that inlet wire is standby to be thrown, and adds bridge switch co-bit logic, realize the protection of main transformer differential/high standby/non electrical quantity open into locking prepared auto restart invalid;
1.3 under inlet wire prepared auto restart mode, increases main transformer protection action back axle 710 switch open position logics;
A kind ofly realize improving one's methods of above-mentioned main transformer protection locking prepared auto restart, comprise differential protection loop, high backup protection loop, non electrical quantity protection loop, bridge switch location aided rebroadcast contact, logic gates, when selecting bridge switch to haul oneself willingly into, add bridge switch and divide a logic, realize the protection of main transformer differential/high standby/non electrical quantity and open into locking prepared auto restart effective; When selecting that inlet wire is standby to be thrown, add bridge switch co-bit logic, realize the protection of main transformer differential/high standby/non electrical quantity open into locking prepared auto restart invalid.
Standby the throwing between startup and action of inlet wire, further improve inlet wire for throwing action logic: add main transformer protection action and bridge switch to divide a criterion.
Compared with prior art, its remarkable advantage is in the present invention:
(1) main transformer protection locking prepared auto restart of the present invention improve one's methods can realize main transformer protection only locking bridge switch haul oneself willingly into, and not locking inlet wire prepared auto restart.
(2) improving one's methods of main transformer protection locking prepared auto restart of the present invention avoids bridge 710 switch failures to cause the secondary pulse of automatic closing to system.
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Accompanying drawing explanation
Tu1Wei 110kV transformer station typical wiring mode schematic diagram.
Fig. 2 divides the main transformer protection locking prepared auto restart figure of co-bit logic for increasing bridge switch.
Fig. 3 is that bridge switch divides a logic to improve the standby flow chart of throwing of inlet wire.
Embodiment
Improving one's methods of a kind of main transformer protection locking prepared auto restart, comprises the following steps:
1.1 when selecting bridge switch to haul oneself willingly into, and adds bridge switch and divide a logic, realizes the protection of main transformer differential/high standby/non electrical quantity and open into locking prepared auto restart effective;
1.2 when selecting that inlet wire is standby to be thrown, and adds bridge switch co-bit logic, realize the protection of main transformer differential/high standby/non electrical quantity open into locking prepared auto restart invalid;
1.3 under inlet wire prepared auto restart mode, increases main transformer protection action back axle 710 switch open position logics.
Comprise differential protection loop, high backup protection loop, non electrical quantity protection loop, bridge switch location aided rebroadcast contact, logic gates, when selecting bridge switch to haul oneself willingly into, add bridge switch and divide a logic, realize the protection of main transformer differential/high standby/non electrical quantity and open into locking prepared auto restart effective; When selecting that inlet wire is standby to be thrown, add bridge switch co-bit logic, realize the protection of main transformer differential/high standby/non electrical quantity open into locking prepared auto restart invalid.
Carry out the perfect of respective flow chart, standby the throwing between startup and action of inlet wire, further improve inlet wire for throwing action logic: add main transformer protection action and bridge switch to divide a criterion, thereby guaranteed the correctness that inlet wire spare power moves.
Below in conjunction with accompanying drawing, the present invention is described in further detail.
The present invention is based on the evaluation method that guarantees power supply reliability, implement as follows:
In conjunction with Fig. 2, wherein because existing backup auto-activating device is southern from PSP642, only can realize the total standby throwing mode of external switch amount locking.Causing regulating and controlling personnel adjustment transformer station is the two very large potential safety hazards of fortune Fang Shiyou that become of single line band, therefore need carry out logic transformation to existing backup auto-activating device: when selecting bridge switch to haul oneself willingly into, add bridge switch and divide a logic, realize the protection of main transformer differential/high standby/non electrical quantity and open into locking prepared auto restart effective; When selecting that inlet wire is standby to be thrown, add bridge switch co-bit logic, realize the protection of main transformer differential/high standby/non electrical quantity open into locking prepared auto restart invalid.
In conjunction with Fig. 3, above-mentioned locking prepared auto restart improvement project can realize main transformer protection only locking bridge switch haul oneself willingly into, and not locking inlet wire prepared auto restart.But inlet wire for throwing mode under, main transformer protection action and bridge 710 switch failures, now inlet wire prepared auto restart will move in fault point, cause the impact again of system, therefore completed main transformer protection action back axle 710 switch open position logics in logic diagram, judge.
Claims (3)
1. improving one's methods of a main transformer protection locking prepared auto restart, is characterized in that, comprises the following steps:
1.1 when selecting bridge switch to haul oneself willingly into, and adds bridge switch and divide a logic, realizes the protection of main transformer differential/high standby/non electrical quantity and open into locking prepared auto restart effective;
1.2 when selecting that inlet wire is standby to be thrown, and adds bridge switch co-bit logic, realize the protection of main transformer differential/high standby/non electrical quantity open into locking prepared auto restart invalid;
1.3 under inlet wire prepared auto restart mode, increases main transformer protection action back axle 710 switch open position logics.
2. realize improving one's methods of main transformer protection locking prepared auto restart claimed in claim 1 for one kind, comprise differential protection loop, high backup protection loop, non electrical quantity protection loop, bridge switch location aided rebroadcast contact, logic gates, it is characterized in that, when selecting bridge switch to haul oneself willingly into, add bridge switch and divide a logic, realize the protection of main transformer differential/high standby/non electrical quantity and open into locking prepared auto restart effective; When selecting that inlet wire is standby to be thrown, add bridge switch co-bit logic, realize the protection of main transformer differential/high standby/non electrical quantity open into locking prepared auto restart invalid.
3. improving one's methods of main transformer protection locking prepared auto restart according to claim 1, is characterized in that, further improves inlet wire for throwing action logic: add main transformer protection action and bridge switch to divide a criterion standby the throwing between startup and action of inlet wire.
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Cited By (8)
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| CN104578386A (en) * | 2014-12-25 | 2015-04-29 | 国家电网公司 | Automatic bus transfer circuit and method for transformer low-voltage side section breakers |
| CN105391165A (en) * | 2015-12-29 | 2016-03-09 | 国家电网公司 | Inlet wire emergency power supply automatic switch-in control method and system |
| CN106026367A (en) * | 2016-07-18 | 2016-10-12 | 国网技术学院 | 110kV backup power source automatic switching action control method with whole-process adaptive capacity |
| CN108963958A (en) * | 2018-06-29 | 2018-12-07 | 南京南瑞继保电气有限公司 | A kind of decompression spare power automatic switching system and starting method |
| CN109149570A (en) * | 2018-09-20 | 2019-01-04 | 国网江苏省电力有限公司镇江供电分公司 | Interior bridge and single-trunk segmental wiring transformer substation spare power automatic switching simplify relay protecting method |
| CN109149758A (en) * | 2018-10-08 | 2019-01-04 | 国网冀北电力有限公司唐山供电公司 | A kind of high, normal, basic three sides prepared auto restart movement fitting method of 110kV substation |
| CN112865283A (en) * | 2021-01-12 | 2021-05-28 | 国网山东省电力公司邹城市供电公司 | Spare power automatic switching device and method for internal bridging type transformer substation |
| CN113783284A (en) * | 2021-07-26 | 2021-12-10 | 国网江苏省电力有限公司淮安供电分公司 | Cross-voltage-class self-adaptive locking spare power automatic switching implementation method |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104578386A (en) * | 2014-12-25 | 2015-04-29 | 国家电网公司 | Automatic bus transfer circuit and method for transformer low-voltage side section breakers |
| CN105391165A (en) * | 2015-12-29 | 2016-03-09 | 国家电网公司 | Inlet wire emergency power supply automatic switch-in control method and system |
| CN106026367A (en) * | 2016-07-18 | 2016-10-12 | 国网技术学院 | 110kV backup power source automatic switching action control method with whole-process adaptive capacity |
| CN106026367B (en) * | 2016-07-18 | 2019-02-26 | 国网技术学院 | A kind of 110kV prepared auto restart method of controlling operation with overall process adaptive ability |
| CN108963958A (en) * | 2018-06-29 | 2018-12-07 | 南京南瑞继保电气有限公司 | A kind of decompression spare power automatic switching system and starting method |
| CN109149570A (en) * | 2018-09-20 | 2019-01-04 | 国网江苏省电力有限公司镇江供电分公司 | Interior bridge and single-trunk segmental wiring transformer substation spare power automatic switching simplify relay protecting method |
| CN109149570B (en) * | 2018-09-20 | 2022-01-11 | 国网江苏省电力有限公司镇江供电分公司 | Spare power automatic switching simplified relay protection method for internal bridge and single bus segmented wiring transformer substation |
| CN109149758A (en) * | 2018-10-08 | 2019-01-04 | 国网冀北电力有限公司唐山供电公司 | A kind of high, normal, basic three sides prepared auto restart movement fitting method of 110kV substation |
| CN112865283A (en) * | 2021-01-12 | 2021-05-28 | 国网山东省电力公司邹城市供电公司 | Spare power automatic switching device and method for internal bridging type transformer substation |
| CN113783284A (en) * | 2021-07-26 | 2021-12-10 | 国网江苏省电力有限公司淮安供电分公司 | Cross-voltage-class self-adaptive locking spare power automatic switching implementation method |
| CN113783284B (en) * | 2021-07-26 | 2023-09-29 | 国网江苏省电力有限公司淮安供电分公司 | Cross-voltage-class self-adaptive blocking standby power automatic switching implementation method |
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