CN201985514U - LAST CB (circuit breaker) protection loop for alternating current filter (ACF) of convertor station - Google Patents
LAST CB (circuit breaker) protection loop for alternating current filter (ACF) of convertor station Download PDFInfo
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- CN201985514U CN201985514U CN2011200255731U CN201120025573U CN201985514U CN 201985514 U CN201985514 U CN 201985514U CN 2011200255731 U CN2011200255731 U CN 2011200255731U CN 201120025573 U CN201120025573 U CN 201120025573U CN 201985514 U CN201985514 U CN 201985514U
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Abstract
A LAST CB (circuit breaker) protection loop for an alternating current filter (ACF) of a convertor station comprises a breaker normally-open auxiliary contact connected with a positive power supply, a breaker control unit connected with the breaker normally-open auxiliary contact, a breaker protection screen connected with the breaker control unit, and a screen for alternating current filter (ACF) wiring protection screen connected between the breaker protection screen and a negative power supply. The solution of the utility model is that the breaker normally-open auxiliary contact is started to be connected in series in the loop of the ACF wiring protection by the LAST breaker of the ACF; and a hold loop is automatically disconnected by serially connecting the breaker normally-open auxiliary contact after the tripping of the breaker without modifying a software logic, so that the problem that a relay cannot restore automatically after tripping due to the mutual hold loop between the LAST CB protection and the ACF wiring protection of an existing ACF is effectively avoided; and the LAST CB protection loop has a simple principle and is convenient to implement.
Description
Technical field
The utility model relates to the power technology field, particularly a kind of current conversion station alternating current filter LAST CB protection loop.
Background technology
LAST CB is last circuit breaker, is also referred to as final switch.The alternating-current switch field of 3/2 mode of connection, every loop line road is by two loops and busbar connection, with regard to every loop line Lu Eryan; when having only a loop and bus to link; the run switch in this loop the final switch on loop line road for this reason, at this moment, relevant protection also just becomes the final switch protection.The final switch protection includes change of current change, circuit, big group of final switch protection of alternating current filter.The receiving end current conversion station adopts the final switch protection can reduce effectively because of the disconnection of change of current change, circuit, big group of final switch of alternating current filter the transient state of AC system to be impacted.
The implementation of the LAST CB protection of extensively adopting at present; be to gather whole alternating-current field circuit breaker position signal; whether go out by logic determines is the last item circuit or last circuit breaker; the screen of control interface on the spot outlet by with regard to the stratum starts the emergency outage order behind the series connection breaker protection action connection point.
Below be example with Jiangmen current conversion station alternating-current field shown in Fig. 1, big group of LAST CB protection discussed to its alternating current filter that adopts.
As shown in Figure 1, this Jiangmen current conversion station 500kV alternating-current switch field first, six, seven, nine string circuit breakers all relate to big group of LAST CB protection of alternating current filter.With big group of the 1st alternating current filter (being the string of first shown in Fig. 1 circuit breaker ACF1) is example, and the decision logic of big group of last circuit breaker of alternating current filter is as shown in the table:
| Last circuit breaker | Decision logic |
| 5013 | ( 50111∨ 5011∨ 50112)∨( 50121∨ 5012∨ 50122) |
| 5012 | 50131∨ 5013∨ 50132 |
In shown in the last table, on behalf of circuit breaker, isolating switch, no underscore closing the position; There is underscore to represent circuit breaker, isolating switch in a minute position; " ∧ " representative " with " logic, " ∨ " representative " or " logic.After Exchange Station control system logic judged to confirm that 5013 circuit breakers are the LAST CB of ACF1 (big group 1 of alternating current filter), " LAST CB ofACF1 " (LAST CB that alternating current filter is big group 1) contact of 5013 circuit breaker control units was with closure.If 5013 breaker protections action tripping, 5013 circuit breakers; to protect all big group and group's circuit breaker of tripping the 1st big group alternating current filter that says the word by the 1st big group alternating current filter on line, shown in big group of LAST CB protection of the alternating current filter among Fig. 2 loop.This loop is a dualization redundant configuration, and diagram only shows a wherein cover loop.
With the protection loop shown in Fig. 2 is example, big group of LAST CB of this alternating current filter protection sequence of movement is: when non-alternating current filter line protection (moving as protections such as malfunctioning switch, female poor, circuits), exchange the closure of the interior corresponding contact of control interface screen on the spot, to disconnect big group of direct trip(ping) circuit of switch of this alternating current filter, trip signal transfers to the protection of alternating current filter on line, by on line protection last circuit breaker of tripping in the process of finishing this big group of alternating current filter switch trip; When alternating current filter on line when action protection, will not consider the final switch logic determines, but big group of all alternating current filter minor group switches of this alternating current filter of first tripping, the last circuit breaker of big group of this alternating current filter of tripping again after the time-delay.
According to above-mentioned existing alternating current filter LAST CB protection, exist between this LAST CB protection and the protection of alternating current filter on line and keep the loop mutually, thus involution automatically after causing tripping relay to move.Be example with the loop contact between the LAST CB of ACF1 protection and the protection of ACF 1 line among Fig. 3, show the schematic diagram of the LAST CB protection self-holding circuit of alternating current filter.
As shown in Figure 3, the loop of Fig. 3 (1) is to be connected to ACF1 line protection screen after the LAST CB protection of ACF 1 is moved, by ACF1 line protection tripping string inner breaker and group's filter and breaker.The loop of Fig. 3 (2) is that the protection of ACF1 line is jumped 5013 circuit breakers by 5013 breaker protections screen.Its sequence of movement process is as follows successively:
(1) 5012 circuit breaker disconnects, and 5013 circuit breakers become the last circuit breaker of ACF1, " Last CB of ACF1 " junction closure of 5013 circuit breaker control units;
(2) at this moment, as the action of ACF1 on line differential protection, the F301 junction closure starts the MT tripping relay that 5013 breaker protections shield, tripping 5013 circuit breakers;
(3) MT junction closure, the K21 tripping relay of the last breaker protection action launching of ACF1 ACF1 on line protection screen;
(4) K21 junction closure is held the MT relay, and the MT contact makes the K21 relay be held again.
So just formed the mutual maintenance between MT relay and the K21 relay; cause 5013 circuit breakers and filter group circuit breaker to close a floodgate; make and to cause involution automatically after the tripping relay action; can only can cut off two self-holding circuits by withdrawing from alternating current filter line protection screen inner outlet brace.
The utility model content
At above-mentioned problems of the prior art; the purpose of this utility model is to provide a kind of current conversion station alternating current filter LAST CB protection loop; exist between its LASTCB protection that can effectively avoid existing alternating current filter and the protection of alternating current filter line and keep the loop mutually and the problem of involution automatically after causing tripping relay to move; and principle is simple, and it is convenient to implement.
For achieving the above object, the utility model by the following technical solutions:
A kind of current conversion station alternating current filter LAST CB protection loop; comprise: often open auxiliary contact with the circuit breaker that cathode power supply joins; often open the circuit breaker control unit that auxiliary contact is connected with described circuit breaker; the breaker protection that is connected with described circuit breaker control unit shields, and is connected in the ACF line protection screen between described breaker protection screen and the negative power supply.
According to above-mentioned scheme of the present utility model; it is often to open auxiliary contact by seal in circuit breaker in the last breaker protection startup of ACF ACF line protection loop; because normal opened contact is not connecing; be not off-state during excitation; therefore do not connecing under the electric situation; this is often opened auxiliary contact and disconnects; thereby the MT relay of the K21 relay of ACF line protection screen and breaker protection screen is opened; can not form self-holding circuit again; it does not need to revise software logic; often open the automatic excision that auxiliary contact realizes keeping behind the circuit breaker trip loop by the series connection circuit breaker; exist between the LAST CB protection of effectively having avoided existing alternating current filter and the protection of alternating current filter line and keep the loop mutually and the problem of involution automatically after causing tripping relay to move; and principle is simple, and it is convenient to implement.
Description of drawings
Fig. 1 is Jiangmen current conversion station 500kV alternating-current field wiring schematic diagram;
Fig. 2 is big group of LAST CB protection of an alternating current filter loop schematic diagram;
Be connected to the structural representation of ACF1 line protection screen after Fig. 3 (1) LAST CB protection action;
Fig. 3 (2) is the structural representation that 5013 circuit breakers are jumped in the protection of ACF1 line;
Fig. 4 is the structural representation of current conversion station alternating current filter LAST CB protection loop embodiment of the present utility model.
Embodiment
As shown in Figure 4, be the structural representation of current conversion station alternating current filter LAST CB of the present utility model protection loop embodiment, in this diagram, be to be that example describes with 5013 circuit breakers shown in Fig. 1.
As shown in Figure 4; current conversion station alternating current filter LAST CB protection loop in the utility model includes: circuit breaker is often driven auxiliary contact, circuit breaker control unit, breaker protection screen and ACF line protection screen; wherein circuit breaker is often opened auxiliary contact, circuit breaker control unit, breaker protection shields and ACF line protection screen is connected successively; the other end that circuit breaker is often opened auxiliary contact is connected with positive source, and the other end of ACF line protection screen is connected with power cathode.Promptly; circuit breaker often opens auxiliary contact and cathode power supply joins; the other end that circuit breaker is often opened auxiliary contact is connected with circuit breaker control unit, and circuit breaker control unit is connected with the breaker protection screen, and ACF line protection screen is connected between breaker protection screen and the negative power supply.
According to above-mentioned current conversion station alternating current filter LAST CB protection of the present utility model loop; because it is off-state when not connecing electricity, non-excitation that circuit breaker is often opened auxiliary contact; therefore do not connecing under the electric situation; this is often opened auxiliary contact and disconnects; make and protect the loop dead electricity; thereby the MT relay of the K21 relay of ACF line protection screen and breaker protection screen is opened, and can not form self-holding circuit, also involution automatically after the tripping relay action.
This implementation; do not need to revise software logic; be often to open the automatic excision that auxiliary contact realizes keeping behind the circuit breaker trip loop by the series connection circuit breaker; exist between the LAST CB protection of effectively having avoided existing alternating current filter and the protection of alternating current filter line and keep the loop mutually and the problem of involution automatically after causing tripping relay to move; and only be to start at the last breaker protection of ACF to seal in circuit breaker in the ACF line protection loop and often open auxiliary contact and realize; principle is simple, and it is convenient to implement.
Aforesaid current conversion station alternating current filter LAST CB protection of the present utility model loop, the LAST CB protection that mainly can be applicable to big group of receiving end current conversion station alternating current filter starts big group of on line of alternating current filter and protects loop and big group of on line protection of alternating current filter to jump the LAST CB loop of big group of alternating current filter.So; the LAST CB protection loop of above-mentioned current conversion station alternating current filter; mainly be meant the LAST CB protection loop of big group of current conversion station alternating current filter, with the problem of involution automatically after effectively avoiding existing mutual maintenance loop to cause tripping relay to move between present most of current conversion station alternating current filter LASTCB protection and the protection of alternating current filter line.
In addition; as mentioned above; the purpose of this utility model be to solve exist the tripping relay that keeps the loop mutually and cause to move between current conversion station alternating current filter LAST CB protection and the protection of alternating current filter line after the problem of involution automatically; in order to reach this purpose; except above-mentioned scheme of the present utility model, can also adopt following dual mode to realize.
Wherein a kind of implementation, be to improve the final switch logic: with above-mentioned 5013 circuit breakers is example, in being the logical condition of LAST CB of ACF1,5013 circuit breakers increase by 5013 the position of closing, 5013 circuit breakers only just can become the last circuit breaker of ACF1 at closing position, like this, after the 5013 circuit breaker trippings, " Last CB of ACF1 " contact is opened, the automatic involution of K21 relay, the MT relay is also by involution.Just, this implementation needs to revise the logic determines condition that LAST CB protects, and the current conversion station that has put into operation does not often possess such modification software and carries out the condition of demonstration test, implements comparatively inconvenience.
Another implementation is to make the LAST CB protection of big group of alternating current filter only jump group's circuit breaker by big group of on line protection of alternating current filter, does not jump the string inner breaker, so just can not form mutual maintenance loop.Just; present service requirement is that the LAST CB protection of big group of alternating current filter is protected tripping string inner breaker by big group of on line of alternating current filter; thereby make this improvement project not satisfy service requirement; in addition; this implementation need be revised the tripping operation node table of LAST CB protection; and carry out demonstration test, loaded down with trivial details relatively.
Above-described execution mode of the present utility model only is the detailed description to the utility model most preferred embodiment, does not constitute the qualification to the utility model protection range.Any modification of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the claim protection range of the present utility model.
Claims (2)
1. a current conversion station alternating current filter LAST CB protects the loop; it is characterized in that; comprise: often open auxiliary contact with the circuit breaker that cathode power supply joins; often open the circuit breaker control unit that auxiliary contact is connected with described circuit breaker; the breaker protection that is connected with described circuit breaker control unit shields, and is connected in the ACF line protection screen between described breaker protection screen and the negative power supply.
2. current conversion station alternating current filter LAST CB protection according to claim 1 loop is characterized in that, this current conversion station alternating current filter LAST CB protection loop is the LAST CB protection loop of big group of current conversion station alternating current filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200255731U CN201985514U (en) | 2011-01-26 | 2011-01-26 | LAST CB (circuit breaker) protection loop for alternating current filter (ACF) of convertor station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200255731U CN201985514U (en) | 2011-01-26 | 2011-01-26 | LAST CB (circuit breaker) protection loop for alternating current filter (ACF) of convertor station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201985514U true CN201985514U (en) | 2011-09-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200255731U Expired - Fee Related CN201985514U (en) | 2011-01-26 | 2011-01-26 | LAST CB (circuit breaker) protection loop for alternating current filter (ACF) of convertor station |
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|---|---|
| CN (1) | CN201985514U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106771841A (en) * | 2017-03-30 | 2017-05-31 | 西安西热节能技术有限公司 | A kind of through-flow system of transformer station S types and method |
-
2011
- 2011-01-26 CN CN2011200255731U patent/CN201985514U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106771841A (en) * | 2017-03-30 | 2017-05-31 | 西安西热节能技术有限公司 | A kind of through-flow system of transformer station S types and method |
| CN106771841B (en) * | 2017-03-30 | 2019-02-22 | 西安西热节能技术有限公司 | A kind of through-flow system of substation S type and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: CHINA ENERGY ENGINEERING GROUP GUANGDONG ELECTRIC Free format text: FORMER NAME: GUANGDONG ELECTRIC POWER DESIGN INSTITUTE |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 510663 Luogang District, Guangdong, Guangzhou Science City Fung Road, No. 1, No. Patentee after: Guangdong Electric Power Design Institute of CEEC Address before: 510663 Luogang District, Guangdong, Guangzhou Science City Fung Road, No. 1, No. Patentee before: Guangdong Electric Power Design Institute |
|
| C56 | Change in the name or address of the patentee |
Owner name: CHINA ENERGY ENGINEERING GROUP GUANGDONG ELECTRIC Free format text: FORMER NAME: CHINA ENERGY ENGINEERING GROUP GUANGDONG ELECTRIC POWER DESIGN INSTITUTE |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 510663 Luogang District, Guangdong, Guangzhou Science City Fung Road, No. 1, No. Patentee after: Company limited of China Energy Engineering Group Guangdong Electric Power Design Institute Address before: 510663 Luogang District, Guangdong, Guangzhou Science City Fung Road, No. 1, No. Patentee before: Guangdong Electric Power Design Institute of CEEC |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110921 Termination date: 20180126 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |