CN111628892A - Single-phase grounding fault line selection device in neutral point ungrounded system - Google Patents
Single-phase grounding fault line selection device in neutral point ungrounded system Download PDFInfo
- Publication number
- CN111628892A CN111628892A CN202010454984.6A CN202010454984A CN111628892A CN 111628892 A CN111628892 A CN 111628892A CN 202010454984 A CN202010454984 A CN 202010454984A CN 111628892 A CN111628892 A CN 111628892A
- Authority
- CN
- China
- Prior art keywords
- module
- data
- line selection
- phase
- information
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/0677—Localisation of faults
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
- G01R19/16571—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing AC or DC current with one threshold, e.g. load current, over-current, surge current or fault current
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/02—Standardisation; Integration
- H04L41/0246—Exchanging or transporting network management information using the Internet; Embedding network management web servers in network elements; Web-services-based protocols
- H04L41/0253—Exchanging or transporting network management information using the Internet; Embedding network management web servers in network elements; Web-services-based protocols using browsers or web-pages for accessing management information
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/02—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/52—Network services specially adapted for the location of the user terminal
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention relates to a single-phase grounding fault line selection device in a neutral point ungrounded system, which comprises: a plurality of acquisition units that are connected with the electric wire netting and are used for gathering the testing data, acquisition unit includes: a plurality of current transformers and splitters; the line selection processing units are connected with the acquisition units; wherein the line selection processing unit includes: a main control processing chip; a communication interface module; a storage module; a signal processing module; and, a WEB interaction module; the WEB interaction module is also connected with a cloud server and an information sending module, geographic information data of each acquisition unit and the current transformer are stored in the cloud server, and when the WEB interaction module receives the alarm data, alarm information containing the geographic information data is generated. Because geographic information data homoenergetic enough guides the concrete position that breaks down, consequently maintenance personal can fix a position the position that breaks down fast according to alarm information for it is more convenient to detect the positioning process.
Description
Technical Field
The invention relates to the technical field of power detection, in particular to a single-phase grounding fault line selection device in a neutral point ungrounded system.
Background
The 10-35KV medium-voltage system in our country is the main component of the power grid, generally consists of 10KV and 35KV buses of a 35KV transformer substation and a 110KV transformer substation, is mainly used for urban and rural power distribution networks, most of the systems adopt a neutral point ungrounded mode and an arc suppression coil grounded mode, when single-phase grounding occurs, the symmetry of system voltage is not damaged, great harm is not caused to power supply equipment, a fault line is allowed to continue to operate for a period of time, normal power supply is not influenced, but if single-phase grounding faults are not processed in time, as the voltage of two phases of a non-fault phase opposite to the ground is increased, weak insulation links are possibly broken down, and are developed into interphase short circuits, so that accidents are enlarged, and the safe operation of the power grid is influenced. In an electric power system, line ground faults account for more than 70% of total faults, and short-circuit faults are mostly single-phase ground to be converted into multi-phase ground. Therefore, when a single-phase earth fault occurs, the fault line must be detected and cut off correctly and timely. Because the zero sequence current is small and has large dispersity, the existing line selection device is difficult to quickly and accurately position the fault position, and maintenance personnel still need to spend much time to check when the fault occurs.
Disclosure of Invention
In order to solve the technical problem, the invention provides a single-phase grounding fault line selection device in a neutral point ungrounded system, which has the advantage of quicker and more convenient detection and positioning process.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a single-phase grounding fault line selection device in a neutral point ungrounded system comprises:
a plurality of acquisition units that are connected with the electric wire netting and are used for gathering the testing data, acquisition unit includes: the current transformer comprises a plurality of current transformers and a splitter connected with the current transformers; and the number of the first and second groups,
the line selection processing units are connected with the acquisition units;
wherein, the line selection processing unit comprises:
a main control processing chip;
the communication interface module is connected with the main control processing chip, and the main control processing unit is connected with a plurality of acquisition units through the communication interface module;
the storage module is connected with the main control processing chip and is used for storing address parameters and detection data of the acquisition units and the current transformer;
the signal processing module is connected with the main control processing chip and used for comparing the detection data with preset data and generating alarm data to be sent to the main control processing chip when the detection data reaches the preset data; and the number of the first and second groups,
the WEB interaction module is connected with the communication interface module and is used for reading the detection data and the alarm data according to the address parameters;
the WEB interaction module is further connected with a cloud server and an information sending module, the information sending module is in wireless connection with mobile equipment of maintenance personnel, the cloud server stores geographic information data of the acquisition units and the current transformer, when the WEB interaction module receives the alarm data, the geographic information data are read according to address parameters to generate alarm information containing the detection data and the geographic information data, and the alarm information is sent to the mobile equipment through the information sending module.
The technical scheme is realized, the current transformer is used for collecting current signals of each line in a power grid, when single-phase earth faults occur, zero sequence current is generated and is detected by the current transformer to generate detection data, the detection data are sent to the main control processing chip and are stored in the storage module, meanwhile, the signal processing module compares the detection data with preset data, and when the detection data reach the threshold range of the preset data, alarm data are generated for alarm prompt; the detection data which can be inquired in the browser in real time through the WEB interaction module, when the WEB interaction module receives alarm data, the WEB interaction module acquires geographic information data in the cloud server according to address information corresponding to the alarm data to generate alarm information, and sends the alarm information to the mobile equipment of maintenance personnel through the information sending module.
As a preferable aspect of the present invention, the signal processing module includes:
the phase detection module is used for detecting the phase state of the detection data;
the digital-to-analog conversion module is used for converting the detection data into phase current data according to the current value and the phase state of the detection data;
the parameter comparison module is used for comparing the zero sequence current value and the phase direction of the phase current data with the preset data; and the number of the first and second groups,
and the information generation module is used for generating the alarm data according to the comparison result of the parameter comparison module.
According to the technical scheme, the signal processing module is used for comparing the numerical value and the phase of the detection data, so that the single-phase earth fault is judged.
As a preferred scheme of the present invention, the WEB interaction module is further connected to an information integration module, and the information integration module is configured to arrange the address parameter corresponding to the alarm information, the detection data, and the geographic information data according to a predetermined policy to generate the alarm information.
As a preferred scheme of the present invention, the information sending module is a GMS short message sending module.
As a preferable aspect of the present invention, the communication interface module includes: the wireless communication device comprises an M I interface, an RMI interface, an RS232 interface, an RS485 interface, a CAN Bus, an M-Bus, an MDOBUS, an I2C Bus, an SPI interface, Bluetooth, an LORA wireless module and a ZigBee wireless module.
As a preferred scheme of the present invention, the main control processing chip is further connected to a print output module, and the print output module is configured to print the address parameters and the detection data.
According to the technical scheme, the address parameters and the detection data are printed through the printing output module, and maintenance task arrangement and maintenance archive arrangement are convenient to carry out.
As a preferred scheme of the present invention, the main control processing chip is further connected to a human-computer interaction module, and the human-computer interaction module is used for setting parameters and selecting operations.
In conclusion, the invention has the following beneficial effects:
the embodiment of the invention provides a single-phase ground fault line selection device in a neutral point ungrounded system, wherein a current transformer is used for collecting current signals of each line in a power grid, when a single-phase ground fault occurs, zero-sequence current is generated and is detected by the current transformer to generate detection data, the detection data are sent to a main control processing chip and are stored in a storage module, meanwhile, a signal processing module is used for comparing the detection data with preset data, and when the detection data reach the threshold range of the preset data, alarm data are generated to give an alarm prompt; the detection data which can be inquired in the browser in real time through the WEB interaction module, when the WEB interaction module receives alarm data, the WEB interaction module acquires geographic information data in the cloud server according to address information corresponding to the alarm data to generate alarm information, and sends the alarm information to the mobile equipment of maintenance personnel through the information sending module.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a line selection processing unit according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a signal processing module according to an embodiment of the present invention.
1. A collection unit; 11. a current transformer; 12. a splitter; 2. a line selection processing unit; 21. a main control processing chip; 22. a communication interface module; 23. a storage module; 24. a signal processing module; 241. a phase detection module; 242. a digital-to-analog conversion module; 243. a parameter comparison module; 244. an information generation module; 25. a WEB interaction module; 251. an information sending module; 252. an information integration module; 26. a print output module; 27. a human-computer interaction module; 3. and (4) a cloud server.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
A single-phase ground fault line selection device in a neutral point ungrounded system, as shown in fig. 1 to 3, comprising: a plurality of acquisition unit 1 that are used for gathering detection data that are connected with the electric wire netting, acquisition unit 1 includes: a plurality of current transformers 11 and splitters 12 connected with the current transformers 11; and a plurality of line selection processing units 2 connected with the acquisition unit 1.
Specifically, the line selection processing unit 2 includes: a main control processing chip 21; the communication interface module 22 is connected with the main control processing chip 21, and the main control processing unit is connected with a plurality of acquisition units 1 through the communication interface module 22; the storage module 23 is connected with the main control processing chip 21, and the storage module 23 is used for storing address parameters and detection data of each acquisition unit 1 and the current transformer 11; the signal processing module 24 is connected with the main control processing chip 21, and the signal processing module 24 is used for comparing the detection data with preset data and generating alarm data to be sent to the main control processing chip 21 when the detection data reaches the preset data; and a WEB interaction module 25 connected to the communication interface module 22, wherein the WEB interaction module 25 is configured to read the detection data and the alarm data according to the address parameter.
The WEB interaction module 25 is further connected with a cloud server 3 and an information sending module 251, the information sending module 251 is in wireless connection with mobile equipment of maintenance personnel, geographic information data of each acquisition unit 1 and the current transformer 11 are stored in the cloud server 3, when the WEB interaction module 25 receives alarm data, the geographic information data are read according to address parameters to generate alarm information containing detection data and the geographic information data, the alarm information is sent to the mobile equipment through the information sending module 251, the information sending module 251 is a GMS short message sending module, the alarm information is sent to the mobile equipment of the maintenance personnel in a short message mode, and the mobile equipment can be a mobile phone, a tablet computer and the like.
Wherein, the signal processing module 24 includes: a phase detection module 241 for detecting a phase state of the detection data; a digital-to-analog conversion module 242 for converting the detection data into phase current data according to a current value and a phase state of the detection data; a parameter comparison module 243, configured to compare a zero sequence current value and a phase direction of the phase current data with preset data; and an information generating module 244 for generating alarm data according to the comparison result of the parameter comparing module 243. The signal processing module 24 compares the magnitude and the phase of the detected data, so as to judge the single-phase earth fault.
In this embodiment, the communication interface module 22 includes: the wireless communication device comprises an M I interface, an RMI interface, an RS232 interface, an RS485 interface, a CAN Bus, an M-Bus, an MDOBUS, an I2C Bus, an SPI interface, Bluetooth, an LORA wireless module and a ZigBee wireless module.
Further, the WEB interaction module 25 is further connected to an information integration module 252, and the information integration module 252 is configured to arrange the address parameters, the detection data, and the geographic information data corresponding to the alarm information according to a predetermined policy to generate alarm information.
The main control processing chip 21 is further connected with a printout module 26, the printout module 26 is used for printing address parameters and detection data, and the address parameters and the detection data are printed through the printout module 26, so that maintenance task arrangement and maintenance archive arrangement are convenient to perform.
Further, the main control processing chip 21 is further connected to a human-computer interaction module 27, the human-computer interaction module 27 is used for setting parameters and selecting operations, and the human-computer interaction module 27 may be a key, a keyboard, a mouse, a display screen, a touch screen, or the like.
When the device is used, the current transformer 11 collects current signals of each line in a power grid, when a single-phase earth fault occurs, zero sequence current is generated and is detected by the current transformer 11 to generate detection data, the detection data are sent to the main control processing chip 21 and are stored in the storage module 23, meanwhile, the signal processing module 24 compares the detection data with preset data, and when the detection data reach the threshold range of the preset data, alarm data are generated to give an alarm prompt; and can inquire the detected data in real time in the browser through the WEB interaction module 25, when WEB interaction module 25 receives the alarm data, WEB interaction module 25 obtains the geographic information data in the cloud server 3 according to the address information corresponding to this alarm data and generates alarm information, and send to maintenance personal's mobile device through the information sending module 251, because address information and geographic information data can both guide the concrete position that breaks down, therefore maintenance personal can fix a position that breaks down fast according to alarm information, make the detection positioning process more convenient.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
It should be noted that, for simplicity of description, the above-mentioned method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present invention is not limited by the order of acts, as some steps may occur in other orders or concurrently in accordance with the invention. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required by the invention.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus may be implemented in other manners. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the above-described division of the units is only one type of division of logical functions, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or communication connection may be an indirect coupling or communication connection between devices or units through some interfaces, and may be in a telecommunication or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention is described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (7)
1. A single-phase grounding fault line selection device in a neutral point ungrounded system is characterized by comprising:
a plurality of acquisition units that are connected with the electric wire netting and are used for gathering the testing data, acquisition unit includes: the current transformer comprises a plurality of current transformers and a splitter connected with the current transformers; and the number of the first and second groups,
the line selection processing units are connected with the acquisition units;
wherein, the line selection processing unit comprises:
a main control processing chip;
the communication interface module is connected with the main control processing chip, and the main control processing unit is connected with a plurality of acquisition units through the communication interface module;
the storage module is connected with the main control processing chip and is used for storing address parameters and detection data of the acquisition units and the current transformer;
the signal processing module is connected with the main control processing chip and used for comparing the detection data with preset data and generating alarm data to be sent to the main control processing chip when the detection data reaches the preset data; and the number of the first and second groups,
the WEB interaction module is connected with the communication interface module and is used for reading the detection data and the alarm data according to the address parameters;
the WEB interaction module is further connected with a cloud server and an information sending module, the information sending module is in wireless connection with mobile equipment of maintenance personnel, the cloud server stores geographic information data of the acquisition units and the current transformer, when the WEB interaction module receives the alarm data, the geographic information data are read according to address parameters to generate alarm information containing the detection data and the geographic information data, and the alarm information is sent to the mobile equipment through the information sending module.
2. The single-phase ground fault line selection device of the neutral point ungrounded system according to claim 1, wherein the signal processing module comprises:
the phase detection module is used for detecting the phase state of the detection data;
the digital-to-analog conversion module is used for converting the detection data into phase current data according to the current value and the phase state of the detection data;
the parameter comparison module is used for comparing the zero sequence current value and the phase direction of the phase current data with the preset data; and the number of the first and second groups,
and the information generation module is used for generating the alarm data according to the comparison result of the parameter comparison module.
3. The single-phase ground fault line selection device in the neutral point ungrounded system according to claim 2, wherein the WEB interaction module is further connected with an information integration module, and the information integration module is configured to arrange the address parameter, the detection data and the geographic information data corresponding to the alarm information according to a predetermined policy to generate the alarm information.
4. The single-phase ground fault line selection device in the neutral point ungrounded system according to claim 2 or 3, wherein the information sending module is a GMS short message sending module.
5. The single-phase ground fault line selection device of the neutral point ungrounded system according to claim 4, wherein the communication interface module comprises: MII interface, RMII interface, RS232 interface, RS485 interface, CAN Bus, M-Bus, MDOBUS, I2C Bus, SPI interface, Bluetooth, LORA wireless module, and ZigBee wireless module.
6. The single-phase ground fault line selection device in the neutral point ungrounded system according to claim 1, wherein a print output module is further connected to the main control processing chip, and the print output module is used for printing the address parameters and the detection data.
7. The single-phase grounding fault line selection device in the neutral point ungrounded system according to claim 1, wherein the main control processing chip is further connected with a human-computer interaction module, and the human-computer interaction module is used for parameter setting and operation selection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010454984.6A CN111628892A (en) | 2020-05-26 | 2020-05-26 | Single-phase grounding fault line selection device in neutral point ungrounded system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010454984.6A CN111628892A (en) | 2020-05-26 | 2020-05-26 | Single-phase grounding fault line selection device in neutral point ungrounded system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111628892A true CN111628892A (en) | 2020-09-04 |
Family
ID=72260003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010454984.6A Pending CN111628892A (en) | 2020-05-26 | 2020-05-26 | Single-phase grounding fault line selection device in neutral point ungrounded system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111628892A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113805095A (en) * | 2021-08-24 | 2021-12-17 | 安徽广聚电力自动化技术有限公司 | Ultrahigh frequency intelligent inspection system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013007051A1 (en) * | 2011-07-13 | 2013-01-17 | 国网电力科学研究院 | Residual-variable-based line selection method for small current grounding |
| CN202794433U (en) * | 2012-08-27 | 2013-03-13 | 深圳市索图科技有限公司 | Power grid fault traveling wave location device based on cloud computing platform |
| CN103293443A (en) * | 2013-05-20 | 2013-09-11 | 国家电网公司 | Overhead wire grounding fault locating method for power distribution network |
| CN109596943A (en) * | 2018-12-26 | 2019-04-09 | 临涣焦化股份有限公司 | A kind of novel high-pressure Small Electric Current Earthing And Routing Device |
| CN109839568A (en) * | 2019-02-25 | 2019-06-04 | 国家电网有限公司 | Transmission line malfunction diagnostic system based on zero-sequence current detection |
-
2020
- 2020-05-26 CN CN202010454984.6A patent/CN111628892A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013007051A1 (en) * | 2011-07-13 | 2013-01-17 | 国网电力科学研究院 | Residual-variable-based line selection method for small current grounding |
| CN202794433U (en) * | 2012-08-27 | 2013-03-13 | 深圳市索图科技有限公司 | Power grid fault traveling wave location device based on cloud computing platform |
| CN103293443A (en) * | 2013-05-20 | 2013-09-11 | 国家电网公司 | Overhead wire grounding fault locating method for power distribution network |
| CN109596943A (en) * | 2018-12-26 | 2019-04-09 | 临涣焦化股份有限公司 | A kind of novel high-pressure Small Electric Current Earthing And Routing Device |
| CN109839568A (en) * | 2019-02-25 | 2019-06-04 | 国家电网有限公司 | Transmission line malfunction diagnostic system based on zero-sequence current detection |
Non-Patent Citations (1)
| Title |
|---|
| 王博: ""变电站直流电源***故障诊断的研究"", 《中国优秀博硕士学位论文全文数据库(硕士)工程科技Ⅱ辑》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113805095A (en) * | 2021-08-24 | 2021-12-17 | 安徽广聚电力自动化技术有限公司 | Ultrahigh frequency intelligent inspection system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107045663B (en) | Visual online checking system and method for secondary safety measure operation ticket | |
| CN108132425A (en) | Power grid distribution line failure on-line monitoring method and system | |
| CN109687590B (en) | Grading outage and restoration reporting method and system | |
| CN101854080A (en) | Digitalized fault wave recording device | |
| CN103606909A (en) | Protecting system and method for power distribution network circuit | |
| Ferreira et al. | Faults monitoring system in the electric power grid of medium voltage | |
| CN113343446B (en) | Data analysis and verification method and system for transformer substation monitoring system | |
| CN111337790A (en) | Distribution network real mirror test platform and detection method for primary and secondary fusion power distribution equipment | |
| CN111044843B (en) | Power transmission line fault positioning method based on multi-source data | |
| CN1801574A (en) | Transformer substation automatization system information safety protecting method based on neural network under IEC 61850 standard | |
| CN111624440A (en) | Single phase grounding fault line selection device in neutral point through arc suppression coil grounding system | |
| CN102707195A (en) | Oscilloscope fault analysis platform and establishment method thereof | |
| CN102540009A (en) | Fault locating system of power distribution network | |
| KR100305921B1 (en) | Test equipment for making of ground and short in a distribution system | |
| CN111628892A (en) | Single-phase grounding fault line selection device in neutral point ungrounded system | |
| CN207366670U (en) | A kind of hierarchical test device based on IEC61850 distribution automations | |
| CN110749802B (en) | Fault positioning method and system for low-voltage distribution network | |
| CN202333779U (en) | Small-current grounding fault detecting and isolating device and system | |
| CN202153246U (en) | Direct current system grounding and ring network fault positioning system | |
| CN212111743U (en) | Single-phase earth fault detection system of line selection device for neutral point ungrounded system | |
| CN203811747U (en) | A small current grounding line selection system | |
| CN110048383A (en) | A kind of power distribution network Distributed Integration protection system | |
| CN116668261A (en) | Multi-source data fusion-based power transformation intelligent gateway system | |
| CN102064607A (en) | Implementation method for forwarding transformer station fault analysis brief to master station | |
| CN215641682U (en) | Residual current operated circuit breaker performance detection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |