CN205304231U - Cascade pilot protection device, power supply relaying protection system of switching station - Google Patents
Cascade pilot protection device, power supply relaying protection system of switching station Download PDFInfo
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- CN205304231U CN205304231U CN201520926691.8U CN201520926691U CN205304231U CN 205304231 U CN205304231 U CN 205304231U CN 201520926691 U CN201520926691 U CN 201520926691U CN 205304231 U CN205304231 U CN 205304231U
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Abstract
The utility model provides a cascade pilot protection device, power supply relaying protection system of switching station, cascade the pilot protection device of switching station, connect the mains side switch of switching station, just the pilot protection device that cascades the switching station includes communication chip and on -off control chip, the on -off control chip is connected the switch, just the blocking signal of on -off control chip connecting communication chip in order to receive adjacent cascaded mains side switch, still including the time delay chip, the on -off control chip passes through the time delay chip side switch of connecting, the on -off control chip with do not receive after the first predetermined time delay of time delay chip with this mains side switch tripping operation during the blocking signal.
Description
Technical field
This utility model relates to transmission of electricity security technology area, particularly relates to the pilot protection device of a kind of cascade switching station, power supply relay protection system.
Background technology
The electric power being transported to various places continually is the resource that human lives is indispensable, and transmit electricity, power transformation technology is to ensure that the basis that electric power transmits. Along with the development in city, electric power application also gets more and more. Along with the increase of electric load, in the supplying power allocation system of Downtown, build substantial amounts of switching station, to solve the problems such as high voltage substation medium-voltage distribution outlet switch cabinet lazy weight, transmission line corridor is limited, contact turn supplies mode dumb. Switching station is by the high-tension electricity electric power facility that peripherad several electric unit is powered respectively, is arranged in the next stage of power system transformer station. Existing switching station adopts cascade structure as shown in Figure 1, and namely switching station S1 is by switching 1 and switch 3 connection main transformer station Z1, and by switching 2 and switch 4 connection switching station S2; And also by switch 17 and switch 18 connection load equipment. The structure of switching station S2 is similar with switching station S1, namely by switching 5 and switch 7 connection switching station S1, and by switching 6 and switch 8 connection switching station S2; And opened switch 19 and switch 20 connection load equipment. As shown in Figure 1, also level to be associated with switching station S3, switching station S4, its structure and principle all identical with switching station S1 and switching station S2.
Owing to the capacity of modern city power distribution network is big, each switching station in the region that load density is bigger enter line and outlet adopts cable all in a large number. Once a cable breaks down, other switching stations of cascade can be influenced by impact, and time often due to fault, current protection does not have selectivity, causes the phenomenon tripped of bypassing the immediate leadership, the expansion of the power failure range that causes the accident occur. Also for Fig. 1, if break down in the position of the trouble point K1 of switching station 4 in the drawings, then the switch 4 in this cascaded loop, switch 7, switch 8, switch 11, switch 12 all can flow through overcurrent, are called " indulge and joined stream ".Adopting circuit structure of the prior art, these above-mentioned switches all can cause tripping operation due to mistake conductance. Such a switching station breaks down, may result in switching station 1, switching station 2, switching station 3, switching station 4 whole load equipments all lose power supply, cause large-area power-cuts. And the other three switching station except switching station 4 can't be impacted by the trouble point K1 in actual switching station 4. In order to prevent this situation, pilot protection signal of the prior art has been divided into block signal, has allowed signal, trip signal; Wherein block signal can stop other switch trips after switch 12 and switch 15 pilot protections.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of cascade switching station and powers relay protection system, it is possible to prevent the inappropriate large-area power-cuts owing to a switching station fault causes, it is ensured that the safety of power supply.
In order to solve the problems referred to above, this utility model embodiment proposes the pilot protection device of a kind of cascade switching station, connects the source-side switches of switching station; And the pilot protection device of described cascade switching station includes communication chip and switch control chip, described switch control chip connects described switch, and described switch control chip connecting communication chip is to receive the block signal of the source-side switches of Adjacent Concatenation; It is characterized in that, also include delay chip, this source-side switches is tripped when connecting source-side switches not receive described block signal after the first time delay of described delay chip by described delay chip by described switch control chip.
Wherein, also including overcurrent protection chip in limited time, described overcurrent protection chip connecting communication chip, delay chip, switch control chip in limited time are to trip described source-side switches by described switch control chip after carrying out the second time delay when communication chip failures by delay chip.
Wherein, also including under-voltage protection chip, described under-voltage protection chip connects described switch control chip and is tripped by this source-side switches controlling described switch control chip when the brownout of described source-side switches.
Wherein, the second time delay is more than the first time delay.
Wherein, by GOOSE signal communication between wherein said pilot protection device.
Wherein, described communication chip is that electric power special line data transmission chip is to transmit GOOSE signal by electric power special line communication network.
Wherein, the source-side switches of described mutual cascade is provided with the pilot protection device as described in front any one.
Having the beneficial effect that of technique scheme of the present utility model:
Such scheme proposes a kind of cascade switching station power relay protection system, it is possible to without influence on the work of other switching stations when having one to break down in the switching station of cascade, it is prevented that due to the large-area power-cuts that minor accident causes.
Accompanying drawing explanation
Fig. 1 is that existing cascade switching station is powered relay protection system structural representation;
Fig. 2 is the work-based logic schematic diagram of this utility model embodiment.
Detailed description of the invention
For making the technical problems to be solved in the utility model, technical scheme and advantage clearly, it is described in detail below in conjunction with the accompanying drawings and the specific embodiments.
Easily causing the problem of large-area power-cuts for cascade switching station of the prior art relay protection system of powering, this utility model embodiment proposes a kind of cascade switching station and powers relay protection system.
As shown in Figure 1, the cascade structure of " handing in hand " formula is all adopted between existing switching station. Therefore in existing cascade switching station, including source-side switches and load side switch. Source-side switches is used for connecting higher level main transformer station/switching station and subordinate's switching station;As switch 2 and switch 5 connection, switch 47 is connected with switch, switch and 6 is connected with switch 9, switchs 8 and switch and 11 connect, switch 10 and switch and 13 be connected, switch 12 and be connected with switching 15; Thus four switching stations are concatenated together.
Load side switch is used for connecting load equipment: the switch 17 of switching station S1 and switch 18 connection load equipment, the switch 19 of switching station S2 and switch 20 connection load equipment, the switch 21 of switching station S3 and switch 22 connection load equipment, the switch 23 of switching station S4 and switch 24 connection load equipment.
Meanwhile, switch 25, switch 26, switch 27, switch 28 are provided in the connecting valve in switching station. Operationally, current direction is in figure shown in electric current I.
The switching station causing all forward directions to prevent from breaking down at K1 place, trouble point is all because of problem that fault current causes power failure; this utility model embodiment proposes a kind of cascade switching station and powers relay protection system; including the switch of at least two cascade, and the switch of described mutual cascade connects pilot protection device.
Wherein, this pilot protection device connects the source-side switches of switching station, including communication chip and switch control chip, described switch control chip connects described switch, and described switch control chip connecting communication chip is to receive the block signal of the source-side switches of Adjacent Concatenation; It is characterized in that, also include delay chip, described switch control chip connects source-side switches by described delay chip, is tripped by this source-side switches when described switch control chip not receive described block signal after the first of described delay chip the predetermined time delay.
Wherein, also including overcurrent protection chip in limited time, described overcurrent protection chip connecting communication chip, delay chip, switch control chip in limited time are to trip described source-side switches by described switch control chip after carrying out the second time delay when communication chip failures by delay chip.
Wherein, also including under-voltage protection chip, described under-voltage protection chip connects described switch control chip and is tripped by this source-side switches controlling described switch control chip when the brownout of described source-side switches.
Wherein, the second time delay is more than the first time delay.
Wherein, by GOOSE signal communication between wherein said pilot protection device.
Wherein, described communication chip is that electric power special line data transmission chip is to transmit GOOSE signal by electric power special line communication network.
Wherein, the source-side switches of described mutual cascade is provided with the pilot protection device as described in any one of claim 1-6.
Or with example as shown in Figure 1, this utility model embodiment is illustrated. Wherein it is possible to switching 2 in FIG, switching 4, switching the mains side protection device being all equipped with this utility model embodiment on 5-12. Of course, it is possible to only configuration on the source-side switches of a part, it is also possible to configuring on all source-side switches, this is not made restriction by this utility model.
During work, break down at K1 place, trouble point, can cause that switch 4, switch 7, switch 8, switch 11, vertical the stream that switchs 12 places all start. If the communication between these switches is normal, then making principle according to vertical connection via flow, switch 4, switch 7, switch 8, switch 11 all can receive block signal, pilot protection device after receiving block signal would not action, keep these switch conductions. Vertical joined stream by switching 12 and do not receive the vertical stream that joined in switch 15 places and start block signal, meeting trip condition.Due to the effect of delay chip, after delay chip time delay 50m, switch 12 is tripped, send out connection simultaneously and jump signal to switch 15. Switch 15 places to receive the connection that send of switch 12 and jump after signals tripping switch 15 after delay chip time delay 50ms, complete Fault Isolation. If power supply direction changes, then according to vertical connection overcurrent protection principle, switch the vertical stream that joined in 15 places by crossing stream starting operation, switch the vertical stream that joined in 12 places and jumped signalizing activity by connection.
Wherein, block signal between the pilot protection device of the source-side switches of mutual cascade and connection are jumped signal and are GOOSE signal. Concrete, this communication chip is electric power special line data transmission chips, to transmit GOOSE signal by electric power special line communication network.
In order to prevent electric power special line fault; the pilot protection device of this utility model embodiment also includes overcurrent protection chip and under-voltage protection chip in limited time, and described overcurrent protection chip connecting communication chip, delay chip, switch control chip in limited time are to trip described source-side switches by described switch control chip after carrying out the second time delay when communication chip failures by delay chip. Wherein, the second time delay is greater than the first time delay. The first time delay in this utility model embodiment is 50ms, and due in switching station Graded coordination when bus-bar fault and outgoing fault be 0.3s (300ms), therefore the second time delay by overcurrent protection in limited time with under-voltage protection is 350ms.
As it is shown in figure 1, when K1 point failure, if the communication abnormality between switch 12 and 15, then overcurrent protection of prescribing a time limit puts into under-voltage protection, switchs 12 places via flow of prescribing a time limit and make after 0.35s time delay, tripping switch 12; Switch 15 places under-voltage protection action tripping switch 15, complete selectivity Fault Isolation. If power supply direction changes, then switch 15 places and prescribe a time limit overcurrent protection action, switch the under-voltage protection action of 12 places, selective ablation fault.
Owing to considering time delay Graded coordination (0.35s), when the feeder line in switching station 4 or bus-bar fault, protection will not malfunction.
When K1 point failure, if other interconnection communication abnormality, as switched the communication abnormality between 4 and 7, then switch overcurrent protection in limited time and the under-voltage protection input of 4,7. Owing to fault is quickly excised in the vertical overcurrent protection action of fault interconnection (between switch 12,15), overcurrent protection in limited time and the under-voltage protection of switch 4,7 are not arrived due to time delay will not malfunction.
Vertical joined stream, actuating breaker failure protection after prescribe a time limit stream or under-voltage protection action, if inductive switch having after 0.2s electric current or being in and close position, then failure protection action exports, and jumps other interconnection switch on this section of bus. As it is shown in figure 1, when K1 point failure, switch 12 places vertical connection via flow and make TRIP 12. Have electric current or switch to be in conjunction position if switching 12 places after 0.2s, then failure protection action outlet tripping switching station 3 switchs 11 and switch 27 (if 27 are in "on" position). In like manner, if switch is 15 malfunctioning, then the switch 16 of failure protection action tripping switching station 4 and switch 28 (if 28 are in "on" position).
The above is preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the premise without departing from principle described in the utility model; can also making some improvements and modifications, these improvements and modifications also should be regarded as protection domain of the present utility model.
Claims (7)
1. a pilot protection device for cascade switching station, connects the source-side switches of switching station;And the pilot protection device of described cascade switching station includes communication chip and switch control chip, described switch control chip connects described switch, and described switch control chip connecting communication chip is to receive the block signal of the source-side switches of Adjacent Concatenation; It is characterized in that, also include delay chip, this source-side switches is tripped when connecting source-side switches not receive described block signal after the first time delay of described delay chip by described delay chip by described switch control chip.
2. the pilot protection device of cascade switching station according to claim 1; it is characterized in that; also including overcurrent protection chip in limited time, described overcurrent protection chip connecting communication chip, delay chip, switch control chip in limited time are to trip described source-side switches by described switch control chip after carrying out the second time delay when communication chip failures by delay chip.
3. the pilot protection device of cascade switching station according to claim 2; it is characterized in that; also including under-voltage protection chip, described under-voltage protection chip connects described switch control chip and is tripped by this source-side switches controlling described switch control chip when the brownout of described source-side switches.
4. the pilot protection device of cascade switching station according to claim 2, it is characterised in that the second time delay is more than the first time delay.
5. the pilot protection device of the cascade switching station according to any one of claim 1-4, it is characterised in that by GOOSE signal communication between wherein said pilot protection device.
6. the pilot protection device of cascade switching station according to claim 5, it is characterised in that described communication chip is that electric power special line data transmission chip is to transmit GOOSE signal by electric power special line communication network.
7. cascade switching station is powered a relay protection system, including the source-side switches of at least two cascade, it is characterised in that the source-side switches of described cascade is provided with the pilot protection device as described in any one of claim 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520926691.8U CN205304231U (en) | 2015-11-18 | 2015-11-18 | Cascade pilot protection device, power supply relaying protection system of switching station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520926691.8U CN205304231U (en) | 2015-11-18 | 2015-11-18 | Cascade pilot protection device, power supply relaying protection system of switching station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205304231U true CN205304231U (en) | 2016-06-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520926691.8U Expired - Fee Related CN205304231U (en) | 2015-11-18 | 2015-11-18 | Cascade pilot protection device, power supply relaying protection system of switching station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205304231U (en) |
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2015
- 2015-11-18 CN CN201520926691.8U patent/CN205304231U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160608 Termination date: 20191118 |
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| CF01 | Termination of patent right due to non-payment of annual fee |