CN204794002U - Optic fibre differential protection system of reclosing - Google Patents
Optic fibre differential protection system of reclosing Download PDFInfo
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- CN204794002U CN204794002U CN201520433120.0U CN201520433120U CN204794002U CN 204794002 U CN204794002 U CN 204794002U CN 201520433120 U CN201520433120 U CN 201520433120U CN 204794002 U CN204794002 U CN 204794002U
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- reclosing
- offside
- optic fibre
- differential protection
- recloses
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- 239000000835 fiber Substances 0.000 title claims abstract description 11
- 230000001681 protective effect Effects 0.000 claims abstract description 14
- 239000013307 optical fiber Substances 0.000 claims description 21
- 230000001360 synchronised effect Effects 0.000 claims description 6
- 238000010276 construction Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
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- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The utility model provides an optic fibre differential protection system of reclosing, it includes: the generating line PT of every transformer substation connects and recloses, connect through optic fibre differential protective system between the reclosing of different transformer substations, this side reclose the fiber communication passageway that utilizes optic fibre differential protection, acquire contralateral busbar voltage and offside breaker state, realize that the non -pressure recloses to reclose with the same period. The utility model has the advantages that: based on current circuit optic fibre differential protection facility, with the logic that recloses that circuit PT was gathered to the tradition, change the voltage that becomes to acquire offside generating line PT and gather offside circuit breaker position, realize that the non -pressure recloses to reclose with the same period, reduced the construction cost of electric wire netting, simplified the electric network composition, higher practical value has.
Description
Technical field
The utility model relates to a kind of optical fiber differential protective reclosing system, belongs to Relay Protection Technology in Power System field.
Background technology
As shown in Figure 1, the reclosing function that traditional optical fiber differential protective adopts is as follows: general side uses coincidence with no pressure, and side only uses overlap the same period in addition.
When reclosing, namely coincidence with no pressure judges that bus has voltage (being gathered by bus PT3), circuit 1 no-voltage (being gathered by circuit PT2), is closed a switch through short time delay.
The same period overlaps namely when reclosing judges that the phase place of circuit 1 voltage (being gathered by circuit PT2) is consistent with the phase place of busbar voltage (being gathered by bus PT3), sends reclosing order, and close corresponding switch.
China is extensive to be transformed power distribution network, is needed by the distribution network line of some to adopt optical fiber differential protective.Traditional distribution line has installed bus PT(voltage transformer), but circuit PT is not installed.Circuit PT investment is installed larger if extensive.
Summary of the invention
The purpose of this utility model is the optical-fibre channel making full use of optical fiber differential protective, providing a kind of optical fiber differential protective reclosing system, without the need to installing circuit PT, realizing reclosing with no pressure and synchronous recloser.
According to the technical scheme that the utility model provides; described optical fiber differential protective reclosing system comprises: the bus PT of each transformer station connects reclosing; connected by fiber differential protection device between the reclosing of different substation; the reclosing of this side utilizes the optical-fiber communication channel of optical fiber differential protective; obtain busbar voltage and the offside circuit-breaker status of offside, realize reclosing with no pressure and synchronous recloser.
Reclosing action logic with no pressure is: when reclosing has charged with starting recloser, when this side and offside circuit breaker point position, side bus PT voltage is less than 30V and is not broken, two conditions meet one, and this side bus PT voltage is greater than 40V, send reclosing order through short time delay, close corresponding switch.
The reclosing action logic same period is: when reclosing has charged with starting recloser, when offside circuit breaker divides position, offside circuit breaker co-bit, two conditions meet one, and this side and 40V, this side are greater than to side bus PT voltage and definite value is less than to side bus PT voltage phase difference, send reclosing order through short time delay, close corresponding switch.
The utility model has the advantages that: based on existing circuit optical fiber differential protection facility; tradition is gathered the reclosing logic of circuit PT; change over the voltage and collection offside circuit breaker position that obtain side bus PT; realize reclosing with no pressure and synchronous recloser; reduce the construction cost of electrical network; simplify electric network composition, there is higher practical value.
Accompanying drawing explanation
Fig. 1 is the reclosing system configuration that prior art optical fiber differential protective adopts.
Fig. 2 is optical fiber differential protective reclosing system configuration of the present utility model.
Fig. 3 is reclosing recharge logic figure.
Fig. 4 is starting recloser information drawing.
Fig. 5 is reclosing action logic figure with no pressure.
Fig. 6 is reclosing action logic same period figure.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.
As shown in Figure 2; the bus PT3 of transformer station connects reclosing; connected by fiber differential protection device between the reclosing of different substation; realize reclosing function and no longer gather line voltage distribution; but utilize the optical-fiber communication channel 4 of optical fiber differential protective; obtain busbar voltage and the offside circuit-breaker status of offside, realize reclosing with no pressure and synchronous recloser.
Realize one section of program code that reclosing function only needs in fiber differential protection device, overall hardware configuration utilizes the hardware configuration of fiber differential protection device, does not need to make hardware to change.
The utility model transmits bus voltage value and this side circuit breaker switch state (point position, co-bit), without the need to installing outlet PT to gather line voltage distribution by optical-fiber communication channel.Killer switch position and busbar voltage are transferred to offside by optical-fibre channel by this side, and the position of the switch and busbar voltage are also transferred to this side by offside.
Reclosing charge condition is identical with tradition, specifically as shown in Figure 3:
1. reclosing pressing plate drops into,
2. this side circuit breaker is in co-bit,
3. there is no blocking by low pressure and other outside block signals,
4. this side and offside PT do not break,
When above condition all meets, send reclosing charging signals through short time delay.
Starting recloser regulations are consistent with traditional entry condition, specifically as shown in Figure 4:
1. with brake lever hand position after conjunction,
2. this side circuit breaker trip,
3. the protection of this side sends trip signal,
4. check this side circuit breaker no current,
5. reclosing charges,
When condition 1,2,3 meets one, and condition 4,5 is all satisfied, sends starting recloser signal.
Reclosing operation condition of the present utility model is as follows:
A, reclosing action logic with no pressure is as Fig. 5:
1. charge at reclosing,
2. starting recloser,
3. this side bus PT voltage is greater than 40V,
4. this side and offside circuit breaker divide position,
5. pair side bus PT voltage is less than 30V and PT does not break,
Satisfy condition 1,2,3, and condition 4,5 meets one, sends reclosing order through short time delay, close corresponding switch.
B, the reclosing action logic same period are as Fig. 6:
1. reclosing charges,
2. starting recloser,
3. this side and 40V is greater than to side bus PT voltage,
4. this side and definite value (as 15 °) is less than to side bus PT voltage phase difference,
5. offside circuit breaker divides position,
6. offside circuit breaker co-bit,
Satisfy condition 1,2,3,4, and condition 5,6 meets one, sends reclosing order through short time delay, close corresponding switch.
When above-mentioned reclosing logic can realize not having circuit PT, utilize optical-fibre channel, obtain side bus voltage and killer switch position, realize reclosing with no pressure and synchronous recloser, reduce the complexity of power distribution network grid equipment.There is higher economy and practical value.
Claims (1)
1. optical fiber differential protective reclosing system; the bus PT comprising transformer station connects reclosing; it is characterized in that: connected by fiber differential protection device between the reclosing of different substation; the reclosing of this side utilizes the optical-fiber communication channel of optical fiber differential protective; obtain busbar voltage and the offside circuit-breaker status of offside, realize reclosing with no pressure and synchronous recloser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520433120.0U CN204794002U (en) | 2015-06-23 | 2015-06-23 | Optic fibre differential protection system of reclosing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520433120.0U CN204794002U (en) | 2015-06-23 | 2015-06-23 | Optic fibre differential protection system of reclosing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204794002U true CN204794002U (en) | 2015-11-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520433120.0U Active CN204794002U (en) | 2015-06-23 | 2015-06-23 | Optic fibre differential protection system of reclosing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204794002U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104917141A (en) * | 2015-06-23 | 2015-09-16 | 国家电网公司 | Fiber differential protection reclosure system |
| CN106684812A (en) * | 2017-02-17 | 2017-05-17 | 国网山东省电力公司威海供电公司 | Device and method for achieving reclosing non-voltage check |
-
2015
- 2015-06-23 CN CN201520433120.0U patent/CN204794002U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104917141A (en) * | 2015-06-23 | 2015-09-16 | 国家电网公司 | Fiber differential protection reclosure system |
| CN104917141B (en) * | 2015-06-23 | 2017-10-03 | 国家电网公司 | Optical fiber differential protective overlaps brake system |
| CN106684812A (en) * | 2017-02-17 | 2017-05-17 | 国网山东省电力公司威海供电公司 | Device and method for achieving reclosing non-voltage check |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |