CN105896729A - Power distribution network based on FTUs and method for diagnosing and isolating faults - Google Patents
Power distribution network based on FTUs and method for diagnosing and isolating faults Download PDFInfo
- Publication number
- CN105896729A CN105896729A CN201610193271.2A CN201610193271A CN105896729A CN 105896729 A CN105896729 A CN 105896729A CN 201610193271 A CN201610193271 A CN 201610193271A CN 105896729 A CN105896729 A CN 105896729A
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- terminal unit
- feeder terminal
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- transformer station
- feeder
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- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000002955 isolation Methods 0.000 claims abstract description 13
- 238000003745 diagnosis Methods 0.000 claims abstract description 10
- 238000004891 communication Methods 0.000 claims description 32
- 230000011218 segmentation Effects 0.000 claims description 9
- 230000005856 abnormality Effects 0.000 claims description 4
- 239000013307 optical fiber Substances 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 2
- 230000003111 delayed effect Effects 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
Classifications
-
- H02J13/0006—
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/16—Electric power substations
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention discloses a power distribution network based on FTUs and a method for diagnosing and isolating faults. The power distribution network comprises a first transformer station and a second transformer station between which section switches are arranged. Each section switch is equipped with a feeder terminal unit (FTU). The FTUs are connected successively. The initial FTU of the outlet wire of the first transformer station is connected with a main station. The initial FTU of the outlet wire of the second transformer station is connected with the main station. The section switch of the outlet wire of the first transformer station is equipped with a breaker. The operating modes of the FTUs are adjusted in real time by a central processor according to a change of connection point and switches are controlled to be on or off, namely, the cooperation of the initial switch and other section switches to isolate faults with an optimal scheme. Thus, reliable and steady feeder automatic fault diagnosis and isolation is achieved, power distribution network automation is easy and convenient to implement, the outlet breaker of the transformer station is prevented from tripping out, and power outage range is reduced when faults are generated.
Description
Technical field
The present invention relates to distribution feeder automation technical field, be more particularly to a kind of tripping operation that prevents from bypassing the immediate leadership
Feeder terminal unit.
Background technology
Along with the requirement of power supply reliability and the quality of power supply is improved constantly by urban subscriber, power supply department is to distribution
The attention degree of net feeder automation is more and more higher.But due to switchtype, the restriction of communication condition, can not
The problem avoiding substation exit circuit breaker trip, causes whole piece outlet to have a power failure.The feedback of urban power distribution network at present
Line automation mainly uses master station-centralized, intelligent distributed and voltage-time type.The feeder line of master station-centralized
The main station failure isolation time of automatization is long, general employing existing substation exit short-circuiting device tripping operation excision fault,
Then separate both sides, trouble point by telecommand to switch, then by substation exit chopper reclosing, recover
Non-faulting block supply.Intelligent distribution type feeder automation, can be quickly based on point-to-point communication between device
Fault Isolation, if but block switch type be between on-load switch, or device employing wireless communication mode,
Then can only rely on power transformation outlet breaker tripping operation excision fault.If communication abnormality between device, will also result in whole
The switch mis-jumping of bar circuit.Although voltage-time type feeder automation is independent of communication network completely, by opening
The automatic reclosing successively closed, completes Fault Isolation, recovers non-faulting block supply, but power off time is long,
Switch repeatedly overlaps, big to system shock.
Summary of the invention
In order to solve above-mentioned technical problem, the present invention provides a kind of control logic for FTU to improve,
Avoid substation exit short-circuiting device to trip, prevent tripping operation of bypassing the immediate leadership, reduce the based on FTU of power failure range
Power distribution network and fault diagnosis and partition method.
Power distribution network based on FTU, including the first transformer station and the second transformer station, in the first transformer station and second
Being provided with multiple block switch between transformer station, block switch is equipped feeder terminal unit, line feed terminals fills
Being sequentially connected with between putting, the outlet head end feeder terminal unit of the first transformer station is connected with main website, the second power transformation
The outlet head end feeder terminal unit stood is connected with main website, and the outlet head end block switch of the first transformer station arranges
Having the first chopper, the outlet head end block switch of the second transformer station is equipped with the second chopper.
In some embodiments, feeder terminal unit includes for gathering the electric parameters analogue value on feeder line
Telemetry module, for gather block switch state remote signal module, for controlling the divide-shut brake of block switch
Remote control module, between feeder terminal unit communication logical between communication and feeder terminal unit and main website
Interrogate module and for the power module powered for feeder terminal unit, telemetry module, remote signal module, remote control mould
Block, communication module and power module are connected with central processing unit respectively.
The diagnosis of power distribution network based on FTU and the method for isolated fault, comprise the following steps:
S1: circuit head end feeder terminal unit is to all segmentations in other feeder terminal units in region and region
Switch detects；
S2: according to the information isolated fault to detecting of the circuit head end feeder terminal unit:
S21: detect that feeder terminal unit is normal with the communication of main website, main website send telecommand to central authorities
Processor, central processing unit controls switch separating brake by remote control module, completes Fault Isolation.
S22: detect and be chopper for optical-fibre communications pattern and block switch between feeder terminal unit, then
Circuit head end feeder terminal unit is by locking information isolated fault mutual between feeder terminal unit.
S23: detect that feeder terminal unit is wireless communication mode or block switch is on-load switch, then arrange
The circuit head end block switch having chopper increases automatic circuit function automatically, breaks feeder fault electricity for control
Stream, other block switches pass through locking information isolated fault point.
S24: detect that communication abnormality between feeder terminal unit, circuit head end feeder terminal unit increase by three automatically
Secondary reclosing function, is used for coordinating voltage-time type logic to complete Fault Isolation.
In some embodiments, the central processing unit state by remote signal module Real-time Collection block switch,
Detect that there is pressure block switch both sides in continuous one minute, then judge that interconnection switch driven by this block switch.
In some embodiments, after trouble point judged by central processing unit, send and jump off a grade block switch and refer to
Order and close interconnection switch instruction, if judge trouble point near interconnection switch, then feeder terminal unit is not
Send out the instruction of conjunction interconnection switch.
It has the beneficial effect that the feeder terminal unit change according to contact point, is adjusted in real time by central processing unit
The operational mode of whole feeder terminal unit, control switch deciliter, i.e. by circuit head end switch and other points
Duan Kaiguan coordinates the scheme with optimum to complete Fault Isolation, makes the fault diagnosis of feeder automation and isolates more
Reliable and stable, distribution network automated enforcement is also more prone to convenient, it is to avoid substation exit chopper
Tripping operation, reduces power failure range during fault.
Accompanying drawing explanation
Fig. 1 is that an embodiment of the present invention a kind of prevents from bypassing the immediate leadership the block schematic illustration of FTU of tripping operation；
Fig. 2 is that the distribution net work structure of the FTU based on a kind of tripping operation that prevents from bypassing the immediate leadership of an embodiment of the present invention shows
It is intended to.
The title of corresponding component represented by numeral in figure:
11. first transformer stations, 12. second transformer stations, 101. first block switches, 102. second segmentations
Switch, 103. the 3rd block switches, 104. the 4th block switches, 105. the 5th block switches, 106.
Six block switches, 107. the 7th block switches, 201. first feeder terminal units, 202. second feeder lines are eventually
End device, 203. the 3rd feeder terminal units, 204. the 4th feeder terminal units, 205. the 5th feeder lines are eventually
End device, 206. the 6th feeder terminal units, 207. the 7th feeder terminal units, 21. telemetry modules,
22. remote signal modules, 23. remote control modules, 24. communication modules, 25. power modules, 26. central authorities process
Device, 3. main website.
Detailed description of the invention
As shown in Figure 1-2, the present invention discloses a kind of power distribution network based on FTU, including the first transformer station 11 He
Second transformer station 12.It is provided with multiple block switch between the first transformer station 11 and the second transformer station 12.Point
Feeder terminal unit it is configured with on Duan Kaiguan.It is sequentially connected with between feeder terminal unit.First transformer station 11 goes out
The feeder terminal unit of line head end is connected with main website 3, the feeder terminal unit of the second transformer station 12 outlet head end
It is connected with main website 3.The block switch of the first transformer station 11 outlet head end is equipped with the first chopper, and second becomes
The block switch of power station 12 outlet head end is equipped with the second chopper.
In the present embodiment, it is sequentially provided with the first segmentation between the first transformer station 11 and the second transformer station 12
Switch the 101, second block switch the 102, the 3rd block switch the 103, the 4th block switch 104, the 5th point
Duan Kaiguan the 105, the 6th block switch 106 and the 7th block switch 107.Configure on first block switch 101
There is the first feeder terminal unit 201, the second block switch 102 be configured with the second feeder terminal unit 202,
It is configured with the 3rd feeder terminal unit 203 on 3rd block switch 103, the 4th block switch 104 is configured with
4th feeder terminal unit 204, the 5th block switch 105 is configured with the 5th feeder terminal unit 205, the
It is configured with the 6th feeder terminal unit 206 on six block switches 106, the 7th block switch 107 is configured with
Seven feeder terminal units 207.First feeder terminal unit the 201, second feeder terminal unit the 202, the 3rd feedback
Line termination the 203, the 4th feeder terminal unit the 204, the 5th feeder terminal unit the 205, the 6th feeder line is eventually
End device 206 and the 7th feeder terminal unit 207 are sequentially connected with.First line feed terminals 201 and power distribution network
Main website 3 connects, and the 7th line feed terminals 207 is connected with the main website 3 of power distribution network.Feeder terminal unit includes using
In the telemetry module 21 of the electric parameters analogue value gathered on feeder line, for gathering the remote signalling of the state of block switch
Module 22, for controlling the remote control module 23 of divide-shut brake of block switch, communication module 24 and for powering
Power module 25.Telemetry module 21, remote signal module 22, remote control module 23, communication module 24 and power supply
Module 25 is connected with central processing unit 26 respectively.
The diagnosis of power distribution network based on FTU and isolated fault method, comprise the following steps:
S1: be defined as circuit head end feeder terminal unit, line from the feeder terminal unit that transformer station's outlet is nearest
All segmentations in other feeder terminal units in distribution region and distribution region are opened by road head end feeder terminal unit
Pass is detected.
Circuit head end feeder terminal unit can receive other feeder terminal units by optical fiber or wireless telecommunications
Status information message, according to message content to all segmentations in other feeder terminal units in region and region
Switch detects；
S2: according to the information isolated fault to detecting of the circuit head end feeder terminal unit:
S21: detect that feeder terminal unit is normal with the communication of main website, main website send telecommand to central authorities
Processor, central processing unit controls switch separating brake by remote control module, completes Fault Isolation.
Central processing unit 26 supports main website 3 centralized feeder automation pattern, all feeder lines in distribution region
In the case of termination is all normal with main website 3 communication of power distribution network, feeder terminal unit preferentially uses concentration
Formula pattern, is sent telecommand by main website 3 and passes through remote control module to central processing unit 26, central processing unit 26
23 control switch separating brake, complete Fault Isolation.Feeder terminal unit according to whether receive the message that main website issues,
Whether communication is normal, if arbitrary feeder terminal unit detects and main website communication in distribution region to judge terminal
Abnormal, then this device automatically switches to intelligent distributed modes.
S22: detect and be chopper for optical-fibre communications pattern and block switch between feeder terminal unit, then
Circuit head end feeder terminal unit is by locking information isolated fault mutual between feeder terminal unit.
After feeder terminal unit at each block switch detected stream information, can superior feeder terminal unit
Send locking information.Owing to light pattern communication speed is fast, receive and dispatch message between device less than 5ms, therefore feeder line
Termination can complete trouble point in 80ms and identify and Fault Isolation.As long as at the first substation exit
Chopper is crossed one section of delayed setting of stream and is more than 80ms, can ensure that the first substation exit chopper does not trips.
S23: detect that feeder terminal unit is wireless communication mode or block switch is on-load switch, then circuit
Head end block switch is provided as chopper, and corresponding feeder terminal unit automatically increases automatic circuit function, is used for
Controlling to break feeder fault electric current, other block switches pass through locking information isolated fault point.
First substation exit chopper is crossed one section of delayed setting of stream and is more than 80ms, has the feedback of automatic circuit function
It is 0ms that line termination crosses one section of delayed setting of stream, then after breaking down, head end block switch break fault
Electric current, other block switches pass through locking information isolated fault point, then head end block switch single shot reclosing,
Complete non-faulting block supply to recover.
S24: detect that communication abnormality between feeder terminal unit, circuit head end feeder terminal unit increase by three automatically
Secondary reclosing function, according to the logic of voltage-time type feeder automation, coordinates other block switches to complete event
Phragma from.
After line fault, head end switch zero propagation tripping operation, then 0.5 second first time reclosing, if instantaneous
Fault, closes a floodgate successfully, if permanent fault, head end switch tripping, other block switches are according to decompression
The logic of separating brake disconnects, after a period of time (2 seconds), and head end switch second time reclosing, other block switches
Close a floodgate successively according to the logic having pressing lock, near the switch of trouble point together in fault after, circuit head end is opened
Pass detects overcurrent tripping, and after 5 seconds, head end switch third time reclosing, other block switches are according to there being pressing
The logic of lock is closed a floodgate successively, near trouble point switch according to logic blocking close a floodgate, thus complete fault every
From.
The central processing unit of the feeder terminal unit state by remote signal module Real-time Collection block switch, detection
Within continuous one minute, there is pressure to block switch both sides, then judge that interconnection switch driven by this block switch.Line feed terminals fills
After trouble point judged by the central processing unit put, send and jump off grade segmentation switch order and close interconnection switch instruction.
If judge trouble point near interconnection switch, then feeder terminal unit do not send out conjunction interconnection switch instruction.Anti-
Only interconnection switch is together in fault, expands fault coverage.
Feeder terminal unit, according to the change of contact point, adjusts feeder terminal unit in real time by central processing unit
Operational mode, control switch deciliter, i.e. coordinated by circuit head end switch and other block switches with
Excellent scheme completes Fault Isolation, makes the fault diagnosis of feeder automation and isolation relatively reliable and stable, joins
The enforcement of grid automation is also more prone to convenient, it is to avoid substation exit circuit breaker trip, reduces event
Power failure range during barrier.
One embodiment of present embodiment is:
S1: circuit head end feeder terminal unit 201 and circuit head end feeder terminal unit 207 are to the first power transformation
Stand 11 and second other feeder terminal units between transformer station 12 distribution region and all block switches are carried out
Detection.
S2: according to circuit head end feeder terminal unit 201 and circuit head end feeder means 207 to detecting
Information judges:
S23: circuit head end feeder terminal unit 201 and circuit head end feeder means 207 detect distribution region
In feeder terminal unit between be on-load switch for the block switch in wireless communication mode or distribution region,
The chopper being then equipped with on the block switch of circuit head end makes the feeder terminal unit of correspondence automatically increase automatic circuit
Function, breaks feeder fault electric current, and locking information isolated fault point is passed through in other segmentations in distribution region.
Described above the most fully discloses the detailed description of the invention of the present invention.It is pointed out that and be familiar with being somebody's turn to do
Any change that the detailed description of the invention of the present invention is done by the technical staff in field is all without departing from the power of the present invention
The scope of profit claim.Correspondingly, the scope of the claim of the present invention is also not limited only to aforementioned tool
Body embodiment.
Claims (5)
1. power distribution network based on FTU, it is characterised in that include the first transformer station and the second transformer station,
It is provided with multiple block switch between described first transformer station and the second transformer station, described block switch is equipped
Feeder terminal unit, is sequentially connected with between described feeder terminal unit, the outlet head end of described first transformer station
Feeder terminal unit is connected with main website, and the outlet head end feeder terminal unit of described second transformer station is with main website even
Connecing, the outlet head end block switch of described first transformer station is equipped with the first chopper, described second transformer station
Outlet head end block switch be equipped with the second chopper.
Power distribution network based on FTU the most according to claim 1, it is characterised in that described line feed terminals
Device includes the telemetry module for gathering the electric parameters analogue value on feeder line, for gathering the shape of block switch
The remote signal module of state, for control the divide-shut brake of block switch remote control module, for feeder terminal unit it
Between between communication and feeder terminal unit and main website communication communication module and for powering for feeder terminal unit
Power module, described telemetry module, remote signal module, remote control module, communication module and power module are respectively
It is connected with central processing unit.
3. according to the diagnosis of the power distribution network based on FTU described in any one of claim 1-2 and isolated fault
Method, it is characterised in that comprise the following steps:
S1: circuit head end feeder terminal unit is to all segmentations in other feeder terminal units in region and region
Switch detects；
S2: according to the information isolated fault to detecting of the circuit head end feeder terminal unit:
S21: detect that feeder terminal unit is normal with the communication of main website, main website send telecommand to central authorities
Processor, central processing unit controls switch separating brake by remote control module, completes Fault Isolation.
S22: detect and be chopper for optical-fibre communications pattern and block switch between feeder terminal unit, then
Circuit head end feeder terminal unit is by locking information isolated fault mutual between feeder terminal unit.
S23: detect that feeder terminal unit is wireless communication mode or block switch is on-load switch, then arrange
The circuit head end block switch having chopper increases automatic circuit function automatically, breaks feeder fault electricity for control
Stream, other block switches pass through locking information isolated fault point.
S24: detect that communication abnormality between feeder terminal unit, circuit head end feeder terminal unit increase by three automatically
Secondary reclosing function, according to the logic of voltage-time type feeder automation, coordinates other block switches to complete event
Phragma from.
The diagnosis of power distribution network based on FTU the most according to claim 3 and the method for isolated fault,
It is characterized in that the described central processing unit state by remote signal module Real-time Collection block switch detects
There is pressure block switch both sides in continuous one minute, then judge that interconnection switch driven by this block switch.
The diagnosis of power distribution network based on FTU the most according to claim 4 and the method for isolated fault,
It is characterized in that, after trouble point judged by described central processing unit, send and jump off grade segmentation switch order and a conjunction
Interconnection switch instruct, if judge trouble point near interconnection switch, then feeder terminal unit do not send out conjunction connection
Network switch order.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610193271.2A CN105896729B (en) | 2016-03-30 | 2016-03-30 | Power distribution network and the method for diagnosis and isolated fault based on FTU |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610193271.2A CN105896729B (en) | 2016-03-30 | 2016-03-30 | Power distribution network and the method for diagnosis and isolated fault based on FTU |
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| CN105896729A true CN105896729A (en) | 2016-08-24 |
| CN105896729B CN105896729B (en) | 2018-07-03 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106786420A (en) * | 2016-12-23 | 2017-05-31 | 广东电网有限责任公司珠海供电局 | A kind of distribution automation automatic fault isolation and the method for self-healing |
| CN108054739A (en) * | 2017-12-18 | 2018-05-18 | 广东电网有限责任公司珠海供电局 | A kind of overhead transmission line feeder automation method and system based on negative-sequence current |
| CN108242818A (en) * | 2016-12-26 | 2018-07-03 | 北京天诚同创电气有限公司 | The control system of energy-accumulating power station and the communication means of control system |
| CN111987801A (en) * | 2020-08-21 | 2020-11-24 | 广东电网有限责任公司 | Transformer substation switch control system and transformer substation switch control method |
| CN113036731A (en) * | 2021-04-25 | 2021-06-25 | 武汉大学 | Point-to-point communication power distribution network feeder fault isolation method and self-healing system |
| CN113629672A (en) * | 2021-08-30 | 2021-11-09 | 福建省宏科电力科技有限公司 | Method and device for rapidly and intelligently isolating faults of power distribution network in zero second after overcurrent |
| CN113659551A (en) * | 2021-08-30 | 2021-11-16 | 福建省宏科电力科技有限公司 | Intelligent fault isolation method and device for power distribution network based on synchronization module |
| CN114696358A (en) * | 2022-04-08 | 2022-07-01 | 重庆中车时代电气技术有限公司 | Control method of regenerative braking energy utilization device and related components |
| CN116106689A (en) * | 2023-04-12 | 2023-05-12 | 国网信息通信产业集团有限公司 | Method, device, equipment and medium for detecting cable faults of power distribution network |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106786420A (en) * | 2016-12-23 | 2017-05-31 | 广东电网有限责任公司珠海供电局 | A kind of distribution automation automatic fault isolation and the method for self-healing |
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| CN113036731A (en) * | 2021-04-25 | 2021-06-25 | 武汉大学 | Point-to-point communication power distribution network feeder fault isolation method and self-healing system |
| CN113036731B (en) * | 2021-04-25 | 2022-02-08 | 武汉大学 | Point-to-point communication power distribution network feeder fault isolation method and self-healing system |
| CN113629672A (en) * | 2021-08-30 | 2021-11-09 | 福建省宏科电力科技有限公司 | Method and device for rapidly and intelligently isolating faults of power distribution network in zero second after overcurrent |
| CN113659551A (en) * | 2021-08-30 | 2021-11-16 | 福建省宏科电力科技有限公司 | Intelligent fault isolation method and device for power distribution network based on synchronization module |
| CN113629672B (en) * | 2021-08-30 | 2023-10-10 | 福建省宏科电力科技有限公司 | Method and device for rapidly and intelligently isolating faults during one-section zero-second overcurrent of power distribution network |
| CN114696358A (en) * | 2022-04-08 | 2022-07-01 | 重庆中车时代电气技术有限公司 | Control method of regenerative braking energy utilization device and related components |
| CN114696358B (en) * | 2022-04-08 | 2024-04-12 | 重庆中车时代电气技术有限公司 | Control method of regenerative braking energy utilization device and related components |
| CN116106689A (en) * | 2023-04-12 | 2023-05-12 | 国网信息通信产业集团有限公司 | Method, device, equipment and medium for detecting cable faults of power distribution network |
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| CN105896729B (en) | 2018-07-03 |
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