CN107607834A - Transformer station's OPGW composite cable on-line monitoring system and method - Google Patents

Transformer station's OPGW composite cable on-line monitoring system and method Download PDF

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Publication number
CN107607834A
CN107607834A CN201710796997.XA CN201710796997A CN107607834A CN 107607834 A CN107607834 A CN 107607834A CN 201710796997 A CN201710796997 A CN 201710796997A CN 107607834 A CN107607834 A CN 107607834A
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China
Prior art keywords
voltage
data
current
line
ied
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CN201710796997.XA
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Chinese (zh)
Inventor
饶思传
张晓华
张路
李芳亚
汤迎春
任乔林
杨帆
徐可
乐卫东
祝丹
孙思友
侯俊
张艳
王丹红
冯文
王蓓
胡雯
黄仁伟
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Xiaogan Power Supply Co of State Grid Hubei Electric Power Co Ltd
Original Assignee
Xiaogan Power Supply Co of State Grid Hubei Electric Power Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Priority to CN201710796997.XA priority Critical patent/CN107607834A/en
Publication of CN107607834A publication Critical patent/CN107607834A/en
Pending legal-status Critical Current

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Abstract

A kind of transformer station's OPGW composite cable on-line monitoring system and monitoring method, multiple monitors are respectively to the voltage on ground wire, earth current and grounding resistance carry out on-line real time monitoring and alarm, each monitor sub- IED on-line and each monitor is connected by wired mode, the data format that optical fiber transmission can be carried out for the monitor data by wire transmission to be converted to is sent to the main IED of on-line monitoring, monitor main IED on-line and all sub- IED of on-line monitoring are connected by optical fiber, for the data format that suitable network cable transmission is converted to from the data for monitoring sub- IED on-line to be sent into main website server, main website server monitors main IED on-line by netting twine connection, for carrying out data manipulation, display and alarm.Voltage, electric current and the resistance states of the power network ground wire of monitoring in real time of the invention, provide for main website server and judge and analyze foundation, perfect substation equipment repair based on condition of component, effective information are provided for transformer station's various kinds of equipment safe operation.

Description

Transformer station's OPGW composite cable on-line monitoring system and method
Technical field
The present invention relates to exist for distribution technique field, more particularly to a kind of transformer station's OPGW composite cable Line monitoring system and monitoring method.
Background technology
Domestic transformer station's OPGW composite cable(OPGW)It is disconnected that terminal draws lower cable thunderbolt in operation Stock, the stranded and de- cable defect failure of induced electricity galvanic corrosion increasingly increase, and presently also provide number without corresponding monitoring device According to monitoring and analysis.
OPGW fiber optic communications are the important components of power communication backbone network, and it carries power network production information.Currently Domestic intelligent grid is in the high-speed developing period, and power communication is largely used for fiber backbone network using OPGW.To improve intelligence electricity The reliability of net safe operation carries out monitoring in round-the-clock 24 hours to OPGW fiber optic communication networks and is particularly important.
The content of the invention
The present invention provides a kind of transformer station's OPGW composite cable on-line monitoring system and monitoring method, real When monitor voltage, electric current and the resistance states of power network ground wire, provides judgement for main website server and analyzes foundation, perfect change Power station equipment repair based on condition of component, effective information is provided for transformer station's various kinds of equipment safe operation.
In order to achieve the above object, the present invention provides a kind of transformer station's OPGW composite cable on-line monitoring System, comprising:
Multiple monitors, its input connects by geodesic diverse location respectively, respectively to the voltage on ground wire, earth current On-line real time monitoring and judgement are carried out with grounding resistance;
The sub- IED of multiple on-line monitorings, each monitor on-line sub- IED input connected respectively by wired mode it is corresponding The output end of monitor, the data format of optical fiber transmission can be carried out for the monitor data by wire transmission to be converted to It is sent to the main IED of on-line monitoring;
Monitor main IED on-line, its input connects all sub- IED of on-line monitoring output end by optical fiber, for comfortable in the future The data format that the sub- IED of line monitoring data are converted to suitable network cable transmission is sent to main website server;
Main website server, its input monitor main IED output end on-line by netting twine connection, are shown and report for carrying out data It is alert.
Described monitor includes:
First Hall coil, it is socketed in by geodesic curve, for probe current signal;
Second Hall coil, it is socketed in by geodesic curve, for probe current signal;
Sensor, it is socketed in by geodesic curve, for detecting voltage signal;Sensor has two coils, first coil It is socketed in by geodesic curve, and connects controlled end, the voltage signal on second coil-induced first coil;
First collector, its input are electrically connected with the first Hall coil, for gathering the resistance connected with the first Hall coil On information of voltage;
Second collector, its input are electrically connected with the second Hall coil, for gathering the resistance connected with the second Hall coil On information of voltage;
3rd collector, its input are electrically connected with sensor, the information of voltage detected for gathering sensor;
Impulse generator, its output end is electrically connected with the controlled end of sensor, for producing the work of Pulse Width Control sensor;
Data processor, its input are electrically connected with the output end of the first collector, the second collector and the 3rd collector, data Processor obtains the voltage gathered by geodesic magnitude of voltage, data processor according to the second collector of the first collector collection Information is calculated by geodesic current value and current and phase difference, and the voltage that data processor gathers according to the 3rd collector is believed Breath is calculated by geodesic resistance value, and judges whether current magnitude of voltage, current value, resistance value and current and phase difference surpass Given threshold is crossed, data processor exports a control signal to the input of the impulse generator;
Communication interface, its input for connecting the output end of data processor and monitoring sub- IED on-line, for by data processor The data that magnitude of voltage, current value and the resistance value of acquisition are converted to cable formats are sent to the sub- IED of on-line monitoring.
Included in described data processor:CPLD and high speed arm processor, for completing jointly Current phase judges.
Described monitor 1 also includes:Display, its input is electrically connected with the output end of data processor, for showing Show warning message.
The present invention also provides a kind of OPGW composite cable on-line monitoring method, comprises the steps of:
Step S1, monitor monitoring in real time is by the magnitude of voltage of diverse location, current value, resistance value and current and phase difference in geodesic curve Whether given threshold is exceeded;
Step S2, monitor sub- IED on-line and the data message of monitor transmission is received by wire transmission mode, and the data are believed Breath is converted to and can carry out the data format of optical fiber transmission and be sent to the main IED of on-line monitoring;
Step S3, monitor main IED on-line and the data message monitored sub- IED on-line and sent is received by optical fiber transmission means, and will The data format that the data message is converted to suitable network cable transmission is sent to main website server;
Step S4, main website server, which receives, monitors the data message that main IED is sent on-line, and data are stored, handle, shown And alarm.
Described step S1 is specifically comprised the steps of:
Step S1.1, collector gathers by the information of voltage of diverse location in geodesic curve respectively;
Step S1.2, the information of voltage that data processor obtains according to collector obtains magnitude of voltage, and current value, electricity is calculated Resistance and current and phase difference, data processor judge whether current magnitude of voltage, resistance value and resistance value exceed given threshold, such as Fruit then sends warning information more than threshold value;
Step S1.3, real-time magnitude of voltage, current value, resistance value and warning information are output to display and carried out by data processor It has been shown that, and real-time magnitude of voltage, current value, resistance value and warning information are exported by communication interface and give on-line monitoring IED.
Described step S1.1 is specifically comprised the steps of:
First collector is gathered by the voltage in geodesic curve by the first Hall coil;The voltage includes thunderbolt voltage and induced electricity Pressure;
Second collector is gathered by the voltage in geodesic curve by the second Hall coil;
3rd collector is gathered by the voltage in geodesic curve by sensor.
In described step S1.2, the method for data processor calculating current value specifically includes:Data processor is according to The magnitude of voltage and current value is calculated with the resistance value that the second Hall coil is connected that two collectors gather;
The method that data processor calculates resistance value specifically includes:The magnitude of voltage meter that data processor gathers according to the 3rd collector Calculation obtains current value, and resistance value is calculated with the current value being calculated further according to the magnitude of voltage of the 3rd collector collection.
In described step S1.2, data processor calculates and judges that the method for current and phase difference specifically includes:
Step S1.3.1, high speed arm processor resets CPLD, and the stand-by period is more than 2s;
Step S1.3.2, high speed arm processor enables CPLD, detects the first current phase, stand-by period More than 1s;
Step S1.3.3, high speed arm processor reads current phase data and stored;
Step S1.3.4, high speed arm processor resets CPLD, and the stand-by period is more than 1s;
Step S1.3.5, high speed arm processor enables CPLD, detects the second current phase, stand-by period More than 1s;
Step S1.3.6, high speed arm processor reads current phase data and stored;
Step S1.3.7, high speed arm processor compares the first current phase and the second current phase, and phase difference is more than 180 degree then Send alarm.
The method of described detection current phase includes:The electricity that CPLD collects the second collector Pressure information is contrasted with caused inside CPLD with reference to 50Hz voltages, calculates both phase datas As current current phase.
Voltage, electric current and the resistance states of the power network ground wire of monitoring in real time of the invention, provided for main website server judge and Foundation is analyzed, perfect substation equipment repair based on condition of component, effective information is provided for transformer station's various kinds of equipment safe operation.
Brief description of the drawings
Fig. 1 is a kind of structure of transformer station's OPGW composite cable on-line monitoring system provided by the invention Schematic diagram.
Fig. 2 is a kind of flow chart of OPGW composite cable on-line monitoring method provided by the invention.
Embodiment
Presently preferred embodiments of the present invention is illustrated below according to Fig. 1 and Fig. 2.
As shown in figure 1, the present invention provides a kind of transformer station's OPGW composite cable on-line monitoring system, bag Contain:
Multiple monitors 1, its input connect by geodesic diverse location respectively, respectively to the voltage on ground wire, ground connection electricity Stream and grounding resistance carry out on-line real time monitoring and judgement;
Multiple sub- IED of on-line monitoring(Intelligent electronic device)2, sub- IED2 input is each monitored on-line respectively by wired side Formula connects the output end of corresponding monitor 1, for the monitor data by wire transmission to be converted to and can carried out The data format of optical fiber transmission is sent to the main IED3 of on-line monitoring;In the present embodiment, monitor 1 and the sub- IED2 of on-line monitoring press one Proportional arrangement than one, many places are set in power network;
Monitor main IED3 on-line, its input connects all sub- IED2 of on-line monitoring output end by optical fiber, for that will come from The data for monitoring sub- IED2 on-line are converted to the data format of suitable network cable transmission and are sent to main website server 4;In the present embodiment, The input for monitoring main IED3 on-line sets multiple ports, for connecting multiple sub- IED2 of on-line monitoring;
Main website server 4, its input monitor main IED3 output end on-line by netting twine connection, for carry out data show with Alarm.
As shown in figure 1, described monitor 1 specifically includes:First Hall coil 101, it is socketed in by geodesic curve, used In probe current signal;
Second Hall coil 102, it is socketed in by geodesic curve, for probe current signal;
Sensor 103, it is socketed in by geodesic curve, for detecting voltage signal;In the present embodiment, the sensor 103 is adopted With noncontacting proximity sensor, sensor 103 has two coils, and first coil is socketed in by geodesic curve, and is connected controlled Hold, the voltage signal on second coil-induced first coil;
First collector 104, its input are electrically connected with the first Hall coil 101, are gone here and there for gathering with the first Hall coil 101 The ohmically information of voltage of connection;In the present embodiment, first collector 104 uses 8 collectors, and sample rate is 10Mb/s;
Second collector 105, its input are electrically connected with the second Hall coil 102, are gone here and there for gathering with the second Hall coil 102 The ohmically information of voltage of connection;In the present embodiment, second collector 105 uses 24 collectors, and sample rate is 10kb/s;
3rd collector 106, its input are electrically connected with sensor 103, the voltage letter detected for gathering sensor 103 Breath;
Impulse generator 107, its output end is electrically connected with the controlled end of sensor 103, for producing Pulse Width Control sensor 103 Work;
Data processor 108, its input are electrically connected with the first collector 104, the second collector 105 and the 3rd collector 106 Output end, data processor 108 obtain the first collector 104 collection by geodesic magnitude of voltage, data processor 108 The information of voltage gathered according to the second collector 105 is calculated by geodesic current value and current and phase difference, data processor 108 information of voltage gathered according to the 3rd collector 106 are calculated by geodesic resistance value, and judge current voltage Whether value, current value, resistance value and current and phase difference exceed given threshold, and data processor 108 exports a control signal to institute State the input of impulse generator 107, the input of output display data to the display 109, output communication data to institute State the input of communication interface;Further, included in described data processor 108:CPLD (CPLD)With high speed arm processor, judge for completing current phase jointly;
Display 109, its input is electrically connected with the output end of data processor 108, for display alarm information;
Communication interface 110, its input for connecting the output end of data processor 108 and monitoring sub- IED2 on-line, for by number The data that magnitude of voltage, current value and the resistance value obtained according to processor 108 is converted to cable formats are sent to on-line monitoring IED2。
As shown in Fig. 2 the present invention a kind of OPGW composite cable on-line monitoring method is also provided, comprising with Lower step:
Step S1, monitor monitoring in real time is by the magnitude of voltage of diverse location, current value, resistance value and current and phase difference in geodesic curve Whether given threshold is exceeded;
Step S2, monitor sub- IED on-line and the data message of monitor transmission is received by wire transmission mode, and the data are believed Breath is converted to and can carry out the data format of optical fiber transmission and be sent to the main IED of on-line monitoring;In the present embodiment, on-line monitoring Data are switched to RS485 and turn the 2M forms of optical interface module to transmit data to the main IED of on-line monitoring by optical fiber by IED;
Step S3, monitor main IED on-line and the data message monitored sub- IED on-line and sent is received by optical fiber transmission means, and will The data format that the data message is converted to suitable network cable transmission is sent to main website server;
Step S4, main website server, which receives, monitors the data message that main IED is sent on-line, and data are stored, handle, shown And alarm.
Described step S1 is specifically comprised the steps of:
Step S1.1, collector gathers by the information of voltage of diverse location in geodesic curve respectively;
Step S1.2, the information of voltage that data processor obtains according to collector obtains magnitude of voltage, and current value, electricity is calculated Resistance and current and phase difference, data processor judge whether current magnitude of voltage, resistance value and resistance value exceed given threshold, such as Fruit then sends warning information more than threshold value;In the present embodiment, pass through artificial given threshold in main website server;
Step S1.3, real-time magnitude of voltage, current value, resistance value and warning information are output to display and carried out by data processor Display(In the present embodiment, display mode is plane tendency chart or form), and by real-time magnitude of voltage, current value, resistance value and Warning information is exported by communication interface gives on-line monitoring IED.
Described step S1.1 is specifically comprised the steps of:
First collector is gathered by the voltage in geodesic curve by the first Hall coil;The voltage includes thunderbolt voltage and induced electricity Pressure, distinguished by data processor according to the time response of voltage, the unit pulse width collected is the μ s of 1.2 μ s~50 voltage For thunderbolt overvoltage, the unit pulse width collected is that the μ s of 250 μ s~2500 voltage is induced voltage;
Second collector is gathered by the voltage in geodesic curve by the second Hall coil;
3rd collector is gathered by the voltage in geodesic curve by sensor.
In described step S1.2, the method for data processor calculating current value specifically includes:Data processor is according to The magnitude of voltage and current value is calculated with the resistance value that the second Hall coil is connected that two collectors gather.The detection of earth current Scope is 0 ~ 400A.
The method that data processor calculates resistance value specifically includes:The voltage that data processor gathers according to the 3rd collector Current value is calculated in value, and resistance is calculated with the current value being calculated further according to the magnitude of voltage of the 3rd collector collection Value.The detection range of grounding resistance is 0 ~ 200 Ω.
Data processor calculates and judges that the method for current and phase difference specifically includes:
Step S1.3.1, high speed arm processor resets CPLD, and the stand-by period is more than 2s;
Step S1.3.2, high speed arm processor enables CPLD, detects the first current phase, stand-by period More than 1s;
Step S1.3.3, high speed arm processor reads current phase data and stored;
Step S1.3.4, high speed arm processor resets CPLD, and the stand-by period is more than 1s;
Step S1.3.5, high speed arm processor enables CPLD, detects the second current phase, stand-by period More than 1s;
Step S1.3.6, high speed arm processor reads current phase data and stored;
Step S1.3.7, high speed arm processor compares the first current phase and the second current phase, and phase difference is more than 180 degree then Send alarm.
The method of described detection current phase includes:The electricity that CPLD collects the second collector Pressure information is contrasted with caused inside CPLD with reference to 50Hz voltages, calculates both phase datas As current current phase.
In described step S4, described main website server shows real time data list and real-time change curve, and carries Inquired about for the inquiry of historical data and historical data change curve, server sets threshold value to the data received, when data are more than Or during less than threshold value, server understands alert, notifies operating personnel to intervene, and provide the website of data exception, possibility The information such as abnormal cause, facilitate staff to find timely processing in time.
Voltage, electric current and the resistance states of the power network ground wire of monitoring in real time of the invention, provided for main website server judge and Foundation is analyzed, perfect substation equipment repair based on condition of component, effective information is provided for transformer station's various kinds of equipment safe operation.
Although present disclosure is discussed in detail by above preferred embodiment, but it should be appreciated that above-mentioned Description is not considered as limitation of the present invention.After those skilled in the art have read the above, for the present invention's A variety of modifications and substitutions all will be apparent.Therefore, protection scope of the present invention should be limited to the appended claims.

Claims (10)

1. a kind of transformer station's OPGW composite cable on-line monitoring system, it is characterised in that include:
Multiple monitors, its input connects by geodesic diverse location respectively, respectively to the voltage on ground wire, earth current On-line real time monitoring and judgement are carried out with grounding resistance;
The sub- IED of multiple on-line monitorings, each monitor on-line sub- IED input connected respectively by wired mode it is corresponding The output end of monitor, the data format of optical fiber transmission can be carried out for the monitor data by wire transmission to be converted to It is sent to the main IED of on-line monitoring;
Monitor main IED on-line, its input connects all sub- IED of on-line monitoring output end by optical fiber, for comfortable in the future The data format that the sub- IED of line monitoring data are converted to suitable network cable transmission is sent to main website server;
Main website server, its input monitor main IED output end on-line by netting twine connection, are shown and report for carrying out data It is alert.
2. transformer station's OPGW composite cable on-line monitoring system as claimed in claim 1, it is characterised in that Described monitor includes:
First Hall coil, it is socketed in by geodesic curve, for probe current signal;
Second Hall coil, it is socketed in by geodesic curve, for probe current signal;
Sensor, it is socketed in by geodesic curve, for detecting voltage signal;Sensor has two coils, first coil It is socketed in by geodesic curve, and connects controlled end, the voltage signal on second coil-induced first coil;
First collector, its input are electrically connected with the first Hall coil, for gathering the resistance connected with the first Hall coil On information of voltage;
Second collector, its input are electrically connected with the second Hall coil, for gathering the resistance connected with the second Hall coil On information of voltage;
3rd collector, its input are electrically connected with sensor, the information of voltage detected for gathering sensor;
Impulse generator, its output end is electrically connected with the controlled end of sensor, for producing the work of Pulse Width Control sensor;
Data processor, its input are electrically connected with the output end of the first collector, the second collector and the 3rd collector, data Processor obtains the voltage gathered by geodesic magnitude of voltage, data processor according to the second collector of the first collector collection Information is calculated by geodesic current value and current and phase difference, and the voltage that data processor gathers according to the 3rd collector is believed Breath is calculated by geodesic resistance value, and judges whether current magnitude of voltage, current value, resistance value and current and phase difference surpass Given threshold is crossed, data processor exports a control signal to the input of the impulse generator;
Communication interface, its input for connecting the output end of data processor and monitoring sub- IED on-line, for by data processor The data that magnitude of voltage, current value and the resistance value of acquisition are converted to cable formats are sent to the sub- IED of on-line monitoring.
3. transformer station's OPGW composite cable on-line monitoring system as claimed in claim 2, it is characterised in that Included in described data processor:CPLD and high speed arm processor, for completing current phase jointly Judge.
4. transformer station's OPGW composite cable on-line monitoring system as claimed in claim 2, it is characterised in that Described monitor 1 also includes:Display, its input are electrically connected with the output end of data processor, believe for display alarm Breath.
A kind of 5. OPGW composite cable on-line monitoring system using as described in any one in claim 1-4 The method that system is monitored on-line, it is characterised in that comprise the steps of:
Step S1, monitor monitoring in real time is by the magnitude of voltage of diverse location, current value, resistance value and current and phase difference in geodesic curve Whether given threshold is exceeded;
Step S2, monitor sub- IED on-line and the data message of monitor transmission is received by wire transmission mode, and the data are believed Breath is converted to and can carry out the data format of optical fiber transmission and be sent to the main IED of on-line monitoring;
Step S3, monitor main IED on-line and the data message monitored sub- IED on-line and sent is received by optical fiber transmission means, and will The data format that the data message is converted to suitable network cable transmission is sent to main website server;
Step S4, main website server, which receives, monitors the data message that main IED is sent on-line, and data are stored, handle, shown And alarm.
6. OPGW composite cable on-line monitoring method as claimed in claim 5, it is characterised in that described Step S1 is specifically comprised the steps of:
Step S1.1, collector gathers by the information of voltage of diverse location in geodesic curve respectively;
Step S1.2, the information of voltage that data processor obtains according to collector obtains magnitude of voltage, and current value, electricity is calculated Resistance and current and phase difference, data processor judge whether current magnitude of voltage, resistance value and resistance value exceed given threshold, such as Fruit then sends warning information more than threshold value;
Step S1.3, real-time magnitude of voltage, current value, resistance value and warning information are output to display and carried out by data processor It has been shown that, and real-time magnitude of voltage, current value, resistance value and warning information are exported by communication interface and give on-line monitoring IED.
7. OPGW composite cable on-line monitoring method as claimed in claim 6, it is characterised in that described Step S1.1 is specifically comprised the steps of:
First collector is gathered by the voltage in geodesic curve by the first Hall coil;The voltage includes thunderbolt voltage and induced electricity Pressure;
Second collector is gathered by the voltage in geodesic curve by the second Hall coil;
3rd collector is gathered by the voltage in geodesic curve by sensor.
8. OPGW composite cable on-line monitoring method as claimed in claim 6, it is characterised in that described In step S1.2, the method for data processor calculating current value specifically includes:Data processor gathers according to the second collector Magnitude of voltage and current value is calculated with the resistance value that the second Hall coil is connected;
The method that data processor calculates resistance value specifically includes:The magnitude of voltage meter that data processor gathers according to the 3rd collector Calculation obtains current value, and resistance value is calculated with the current value being calculated further according to the magnitude of voltage of the 3rd collector collection.
9. OPGW composite cable on-line monitoring method as claimed in claim 6, it is characterised in that described In step S1.2, data processor calculates and judges that the method for current and phase difference specifically includes:
Step S1.3.1, high speed arm processor resets CPLD, and the stand-by period is more than 2s;
Step S1.3.2, high speed arm processor enables CPLD, detects the first current phase, stand-by period More than 1s;
Step S1.3.3, high speed arm processor reads current phase data and stored;
Step S1.3.4, high speed arm processor resets CPLD, and the stand-by period is more than 1s;
Step S1.3.5, high speed arm processor enables CPLD, detects the second current phase, stand-by period More than 1s;
Step S1.3.6, high speed arm processor reads current phase data and stored;
Step S1.3.7, high speed arm processor compares the first current phase and the second current phase, and phase difference is more than 180 degree then Send alarm.
10. OPGW composite cable on-line monitoring method as claimed in claim 9, it is characterised in that described The method of detection current phase include:The information of voltage that CPLD collects the second collector and complexity Contrasted caused by inside PLD with reference to 50Hz voltages, calculate both phase datas as current electricity Flow phase.
CN201710796997.XA 2017-09-06 2017-09-06 Transformer station's OPGW composite cable on-line monitoring system and method Pending CN107607834A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113484683A (en) * 2021-07-14 2021-10-08 贵州电网有限责任公司 Power distribution network fault positioning system and method based on transient information

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106908653A (en) * 2017-04-27 2017-06-30 上海欧秒电力监测设备有限公司 OPGW on-line monitoring systems and method
CN206773058U (en) * 2017-04-27 2017-12-19 上海欧秒电力监测设备有限公司 OPGW on-line monitoring systems

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106908653A (en) * 2017-04-27 2017-06-30 上海欧秒电力监测设备有限公司 OPGW on-line monitoring systems and method
CN206773058U (en) * 2017-04-27 2017-12-19 上海欧秒电力监测设备有限公司 OPGW on-line monitoring systems

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113484683A (en) * 2021-07-14 2021-10-08 贵州电网有限责任公司 Power distribution network fault positioning system and method based on transient information

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