CN109711573B - Steady-state homologous data comparison method for wave recording acquisition unit and protection device - Google Patents
Steady-state homologous data comparison method for wave recording acquisition unit and protection device Download PDFInfo
- Publication number
- CN109711573B CN109711573B CN201811625550.7A CN201811625550A CN109711573B CN 109711573 B CN109711573 B CN 109711573B CN 201811625550 A CN201811625550 A CN 201811625550A CN 109711573 B CN109711573 B CN 109711573B
- Authority
- CN
- China
- Prior art keywords
- data
- acquisition unit
- analog quantity
- protection device
- comparison
- 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.)
- Active
Links
Classifications
-
- 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
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
Landscapes
- Emergency Protection Circuit Devices (AREA)
- Alarm Systems (AREA)
Abstract
The invention discloses a method for comparing steady-state homologous data of a recording acquisition unit and a protection device, which comprises the steps of establishing a mapping relation between a channel of the recording acquisition unit and an MMS (multimedia messaging service) data set item of the protection device; obtaining analog quantity data of a wave recording acquisition unit, analog quantity data of a protection device, switching value variable bit data of the wave recording acquisition unit and switching value variable bit data of the protection device; carrying out effective data comparison, amplitude comparison and phase angle comparison; and performing time comparison and state comparison. The invention can conveniently monitor the homologous data of the intelligent substation in real time, find the hidden trouble and fault of the power system and improve the operation and maintenance efficiency.
Description
Technical Field
The invention belongs to the technical field of relay protection of power systems, and particularly relates to a steady-state homologous data comparison method for a wave recording acquisition unit and a protection device.
Background
The development of microcomputer protection and self-diagnosis technology of microcomputer automatic devices lays a technical foundation for the state monitoring of protection equipment. Although the digital protection device has a condition monitoring implementation basis, the relay protection device serving as a power grid safety barrier also comprises an alternating current input, a direct current loop, an operation control loop and the like, if the condition monitoring category is only limited to the device, the reliability of a relay protection system is difficult to be fully reflected, the condition monitoring of the protection needs to be considered as a systematic problem, or if a protection condition monitoring link can comprise the alternating current input, the direct current, the operation loop and the like, the equipment operation condition evaluation realized on the basis is more likely to be popularized in practical application. Therefore, the online monitoring of the protection device should further include: the alternating current measurement system comprises a complete secondary circuit and intact measurement elements; the direct current system comprises a direct current power circuit, an operation circuit and a signal circuit; a logic judgment system: including hardware logic decision loops and software functions. From the view of the operation of the transformer substation, due to the high-voltage level protection dualization configuration, the relay protection dual AD configuration and the like, a large amount of secondary equipment redundancy measurement information exists in the transformer substation, and the measurement data directly reflect the operation conditions of relay protection sampling and open-loop. By mutually checking the redundant information, hidden faults of the secondary loop and the corresponding secondary equipment component can be found.
At present, a large amount of measurement information of the redundancy of secondary equipment exists in the intelligent substation, and if the redundancy information can be fully utilized, the occurrence of fault accidents of the intelligent substation can be effectively reduced and prevented. The invention judges whether the running state of the transformer substation has a problem or not by utilizing the redundant information, and compares the transient homologous data by acquiring the recording files of the acquisition unit and the protection device, thereby facilitating the real-time monitoring of the homologous data of the intelligent transformer substation, finding the hidden danger and the fault of the power system and improving the operation and maintenance efficiency.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a method for comparing stable state homologous data of a recording acquisition unit and a protection device. The problem of homologous data comparison between the recording wave acquisition unit channel from the same data source and the MMS data set items of the protection device is solved.
A steady-state homologous data comparison method of a recording acquisition unit and a protection device comprises the following steps:
step 1, analyzing a CFG file to obtain a channel number and a channel type of each channel of a recording collection unit, analyzing an SCD file of a transformer substation to obtain an MMS (multimedia messaging service) data set entry of each protection device in the transformer substation, and establishing a mapping relation between the channel of the recording collection unit and the MMS data set entry of the protection device;
step 2, determining an analog quantity channel of the recording acquisition unit according to the channel number and the channel type, obtaining analog quantity data of the recording acquisition unit from the recording acquisition unit at regular time, and obtaining analog quantity data of the protection device according to an MMS address corresponding to the analog quantity channel mapping of the recording acquisition unit;
determining a switching value channel of the wave recording acquisition unit according to the channel number and the channel type, obtaining switching value variable data of the wave recording acquisition unit from a switching value variable data base of the wave recording acquisition unit at regular time, and obtaining switching value variable data of the protection device from a switching value variable data base of the protection device according to an MMS address corresponding to the switching value channel mapping of the wave recording acquisition unit;
step 3, judging whether the acquired analog quantity data of the recording acquisition unit and the analog quantity data of the protection device are valid, if the amplitude of the analog quantity data of the recording acquisition unit and the amplitude of the analog quantity data of the protection device are both larger than or equal to 0.1 multiplied by a secondary rated value, the data are valid, and continuing amplitude comparison and phase angle comparison; otherwise, the data is invalid and data invalid alarm is carried out; setting m as an analog quantity amplitude data comparison threshold value, xb2 as an amplitude of the analog quantity data of the protection device, xb1 as an amplitude of analog quantity data of a recording acquisition unit corresponding to the analog quantity data of the protection device, and Xbn as Xb1 or Xb2;
the amplitude comparison comprises the following steps:
if it is
Comparing the analog quantity data and giving an alarm;
if it is
It is further judged whether Xb2 and Xb1 correspond to the amplitude of the a-phase analog quantity data,
if Xb2 and Xb1 correspond to the amplitude of the A phase analog quantity data, not performing analog quantity data comparison alarm, and not continuously performing phase angle data comparison;
if Xb2 and Xb1 do not correspond to the amplitude of the phase A, continuing to compare the phase angle data;
the phase angle comparison comprises the following steps:
calculating the absolute value of the difference value between the phase of the analog quantity data of the protection device and the reference phase of the protection device and recording the absolute value as Xa1, wherein the reference phase of the protection device is the phase of the analog quantity data of the A-phase protection device in the same group as the compared analog quantity data of the protection device; calculating the absolute value of the difference value between the phase of the analog quantity data of the wave recording acquisition unit and the reference phase of the wave recording acquisition unit and recording the absolute value as Xa2, wherein the reference phase of the wave recording acquisition unit is the phase of the analog quantity data of the A-phase wave recording acquisition unit in the same group as the analog quantity data of the compared wave recording acquisition unit;
if Xa2-Xa1| p, then analog quantity data comparison alarm is carried out;
if the absolute value of Xa1-Xa2 is less than or equal to p, no analog quantity data comparison alarm is carried out;
wherein p is the comparison threshold value of the analog quantity phase angle data,
step 4, carrying out time comparison and state comparison on the switching value bit data of the wave recording acquisition unit and the corresponding switching value bit data of the protection device, setting a time set as a threshold value for switching value time data comparison, t1 as absolute time of displacement occurrence in the switching value bit data of the protection device, t2 as absolute time of displacement occurrence in the switching value bit data of the wave recording acquisition unit, state1 as a state after displacement in the switching value bit data of the protection device, and state2 as a state after displacement in the switching value bit data of the wave recording acquisition unit,
the time alignment comprises the following steps:
if the | t1-t2| is larger than timeout, performing switching value data comparison alarm;
if the | t1-t2| is less than or equal to the timeout set, continuing to carry out state comparison;
the state comparison comprises the following steps:
if the state1= state2, the switching value data comparison alarm is not carried out;
if the state1 is not equal to the state2, performing switching value data comparison alarm;
wherein, state1 is the state after the displacement in the switching value displacement data of the protection device, and state2 is the state after the displacement in the switching value displacement data of the recording acquisition unit.
According to the method, the analog quantity channel data and the switching value variable bit data of the channels corresponding to the recording acquisition units and the protection devices are obtained by establishing a channel mapping relation, and different algorithms are compared to generate a comparison result, so that whether the analog quantity data and the switching value variable bit data of the recording acquisition unit channels of the same data source in the intelligent substation and the analog quantity data and the switching value variable bit data corresponding to the MMS data set items of the protection devices are accurate and consistent or not can be monitored in real time, the real-time monitoring of the homologous data of the intelligent substation is facilitated, the hidden danger and the fault of a power system are discovered, and the operation and maintenance efficiency is improved.
Detailed Description
A steady-state homologous data comparison method for a recording acquisition unit and a protection device comprises the following steps:
step 1, establishing a mapping relation between a channel of a recording acquisition unit and an MMS data set item of a protection device, wherein the channel of the recording acquisition unit comprises a switching value channel of the recording acquisition unit and an analog value channel of the recording acquisition unit, the channel type comprises the switching value channel and the analog value channel, the channel of the recording acquisition unit identifies whether the channel is the switching value channel or the analog value channel through the channel type, and the channel of the recording acquisition unit marks a serial number in the switching value channel and a serial number in the analog value channel through a channel number;
the configuration work is based on a CFG file in a fault recording file of a recording acquisition unit and an SCD file of an intelligent substation where the protection device is located. The method comprises the steps of obtaining channel numbers and channel types of all channels of a recording collection unit through analyzing a CFG file, knowing whether switching value variable bit data or analog data are recorded by all the channels respectively through the channel types, obtaining MMS data set items of all protection devices in a transformer substation through analyzing an SCD file of the transformer substation, establishing a mapping relation between the channels of the recording collection unit and the MMS data set items of the protection devices according to actual conditions, and generating a configuration file. The configuration file needs to record the channel number and the channel type of the channel of the recording acquisition unit in each mapping relation, and the MMS address of the MMS data set entry of the corresponding protection device.
Step 2, determining an analog quantity channel of the recording acquisition unit according to the channel number and the channel type, obtaining analog quantity data of the recording acquisition unit from the recording acquisition unit at regular time, and obtaining analog quantity data of the protection device according to an MMS address corresponding to the analog quantity channel mapping of the recording acquisition unit;
determining a switching value channel of the wave recording acquisition unit according to the channel number and the channel type, obtaining switching value variable data of the wave recording acquisition unit from a switching value variable data base of the wave recording acquisition unit at regular time, and obtaining switching value variable data of the protection device from a switching value variable data base of the protection device according to an MMS address corresponding to the switching value channel mapping of the wave recording acquisition unit;
analog quantity data acquisition: the acquisition of the analog quantity channel data of the recording acquisition unit can be realized by sending a channel number, a channel type and a message reply identifier corresponding to the analog quantity data to be acquired to the recording acquisition unit, and taking the channel number plus the channel type as the unique identifier of the channel of the recording acquisition unit. And the wave recording acquisition unit receives the channel number and the channel type (analog channel type), and packs and feeds back the effective value of the amplitude, the phase, the channel number, the channel type and the message reply identifier. The acquisition of the analog quantity channel data of the protection device can be to acquire the corresponding analog quantity channel data of the protection device through the MMS address and perform feedback.
Data acquisition of switching value: the recording acquisition unit monitors data of all switching value channels in a CFG file of the recording acquisition unit in real time, when displacement occurs, the switching value variable bit data of the recording acquisition unit is stored in a switching value variable bit data base of the recording acquisition unit, and the switching value variable bit data of the recording acquisition unit comprises channel types, channel numbers, the state after displacement and absolute time of displacement. And the protection device monitors the received GOOSE displacement message in real time, and records the corresponding switching value displacement data of the protection device in the GOOSE message when receiving the GOOSE message data, wherein the switching value displacement data of the protection device comprises an MMS address, a displaced state and absolute displacement time.
Step 3, judging whether the acquired analog data of the recording acquisition unit and the analog data of the protection device are valid, and comparing the valid data comprises the following steps:
if the amplitude of the analog quantity data of the recording acquisition unit and the amplitude of the analog quantity data of the protection device are both larger than or equal to 0.1 multiplied by a quadratic rated value, the data are valid, and amplitude comparison and phase angle comparison are continuously carried out; otherwise, the data is invalid and data invalid alarm is carried out.
The amplitude comparison comprises the following steps:
if it is
Comparing the analog quantity data and giving an alarm;
if it is
Further judge if Xb2 and Xb1 correspond to A-phase analog quantity dataThe amplitude of the amplitude is,
if Xb2 and Xb1 correspond to the amplitude of A phase analog quantity data, not carrying out analog quantity data comparison alarm, and not continuously carrying out phase angle data comparison;
if Xb2 and Xb1 do not correspond to the amplitude of the phase A, continuing to compare the phase angle data;
wherein m is an analog quantity amplitude data comparison threshold value, xb2 is an amplitude of the analog quantity data of the protection device, xb1 is an amplitude of the analog quantity data of the recording acquisition unit corresponding to the analog quantity data of the protection device, and Xbn is Xb1 or Xb2;
the phase angle comparison comprises the following steps:
because the acquired steady-state homologous analog quantity data come from the wave recording acquisition unit and the protection device, the data given by the two are not time-aligned, so that the phase angle comparison cannot be directly compared, and when the polarity reversal/phase error sequence of a CT (current transformer) or the phase error sequence of a PT (voltage transformer) occurs, the alarm cannot be given only by means of amplitude comparison, and the phase angle comparison is required.
The following scheme is adopted for phase angle comparison: calculating the absolute value of the difference value between the phase of the analog quantity data of the protection device and the reference phase of the protection device and recording the absolute value as Xa1, wherein the reference phase of the protection device is the phase of the analog quantity of the protection device corresponding to the analog quantity data of the A phase in the same group with the analog quantity data of the protection device to be compared; and calculating the absolute value of the difference value between the phase of the analog quantity data of the recording acquisition unit and the reference phase of the recording acquisition unit and recording the absolute value as Xa2, wherein the reference phase of the recording acquisition unit is the phase of the analog quantity of the recording acquisition unit corresponding to the analog quantity data of the A phase in the same group with the analog quantity data of the compared recording acquisition unit.
If Xa2-Xa1| p, then analog quantity data comparison alarm is carried out;
if the absolute value Xa1-Xa2 is less than or equal to p, the analog quantity data comparison alarm is not carried out;
wherein p is the comparison threshold value of the analog quantity phase angle data,
step 4, comparing the on-off quantity variable data of the recording acquisition unit with the corresponding on-off quantity variable data of the protection device for time and state,
the time alignment comprises the following steps:
if the | t1-t2| is larger than timeout, performing switching value data comparison alarm;
if the | t1-t2| is less than or equal to the timeout set, continuing to perform state comparison;
wherein, the timestamp is a threshold value of the comparison of the switching value time data, t1 is the absolute time of the displacement in the switching value bit data of the protection device, and t2 is the absolute time of the displacement in the switching value bit data of the recording acquisition unit.
The state comparison comprises the following steps:
if the state1= state2, the switching value data comparison alarm is not carried out;
if the state1 is not equal to the state2, performing switching value data comparison alarm;
wherein, state1 is the state after the displacement in the switching value displacement data of the protection device, and state2 is the state after the displacement in the switching value displacement data of the recording acquisition unit.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments, or alternatives may be employed, by those skilled in the art, without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (1)
1. A steady-state homologous data comparison method for a recording acquisition unit and a protection device is characterized by comprising the following steps:
step 1, analyzing a CFG file to obtain a channel number and a channel type of each channel of a recording collection unit, wherein the channel type comprises a switching value channel and an analog value channel, obtaining an MMS (multimedia messaging service) data set item of a protection device in a transformer substation by analyzing an SCD (substation configuration description) file of the transformer substation, and establishing a mapping relation between the channel of the recording collection unit and the MMS data set item of the protection device;
step 2, determining an analog quantity channel of the recording acquisition unit according to the channel number and the channel type, obtaining analog quantity data of the recording acquisition unit from the recording acquisition unit at regular time, and obtaining analog quantity data of the protection device according to an MMS address corresponding to the analog quantity channel mapping of the recording acquisition unit;
determining a switching value channel of the wave recording acquisition unit according to the channel number and the channel type, obtaining switching value variable data of the wave recording acquisition unit from a switching value variable data base of the wave recording acquisition unit at regular time, and obtaining switching value variable data of the protection device from a switching value variable data base of the protection device according to an MMS address corresponding to the switching value channel mapping of the wave recording acquisition unit;
step 3, judging whether the acquired analog quantity data of the recording acquisition unit and the analog quantity data of the protection device are valid, if the amplitude of the analog quantity data of the recording acquisition unit and the amplitude of the analog quantity data of the protection device are both larger than or equal to 0.1 multiplied by a secondary rated value, the data are valid, and continuing amplitude comparison and phase angle comparison; otherwise, the data is invalid and data invalid alarm is carried out; setting m as an analog quantity amplitude data comparison threshold value, xb2 as an amplitude of the analog quantity data of the protection device, xb1 as an amplitude of analog quantity data of a recording acquisition unit corresponding to the analog quantity data of the protection device, and Xbn as Xb1 or Xb2;
the amplitude comparison comprises the following steps:
if it is
Comparing the analog quantity data and giving an alarm;
if it is
It is further judged whether Xb2 and Xb1 correspond to the amplitude of the a-phase analog quantity data,
if Xb2 and Xb1 correspond to the amplitude of A phase analog quantity data, not carrying out analog quantity data comparison alarm, and not continuously carrying out phase angle data comparison;
if Xb2 and Xb1 do not correspond to the amplitude of the phase A, continuing to compare the phase angle data;
the phase angle comparison comprises the following steps:
calculating the absolute value of the difference value between the phase of the analog quantity data of the protection device and the reference phase of the protection device and recording the absolute value as Xa1, wherein the reference phase of the protection device is the phase of the analog quantity of the protection device corresponding to the analog quantity data of the A phase in the same group with the analog quantity data of the protection device to be compared; calculating the absolute value of the difference value between the phase of the analog quantity data of the recording acquisition unit and the reference phase of the recording acquisition unit and recording the absolute value as Xa2, wherein the reference phase of the recording acquisition unit is the phase of the analog quantity of the recording acquisition unit corresponding to the analog quantity data of the A phase in the same group as the analog quantity data of the compared recording acquisition unit;
if Xa2-Xa1 is greater than p, then analog quantity data comparison alarm is carried out;
if the absolute value Xa1-Xa2 is less than or equal to p, the analog quantity data comparison alarm is not carried out;
wherein p is the comparison threshold value of the analog quantity phase angle data,
step 4, carrying out time comparison and state comparison on the wave recording acquisition unit switching value data and the corresponding protection device switching value data, setting timestamp as a threshold value for the switching value time data comparison, t1 as absolute time of displacement occurrence in the protection device switching value data, t2 as absolute time of displacement occurrence in the wave recording acquisition unit switching value data, state1 as a state after displacement in the protection device switching value data, and state2 as a state after displacement in the wave recording acquisition unit switching value data,
the time alignment comprises the following steps:
if the | t1-t2| is larger than timeout, performing switching value data comparison alarm;
if the | t1-t2| is less than or equal to the timeout set, continuing to perform state comparison;
the state comparison comprises the following steps:
if the state1= state2, the switching value data comparison alarm is not carried out;
if the state1 is not equal to the state2, performing switching value data comparison alarm;
wherein, state1 is the state after the displacement in the switching value variable data of the protection device, and state2 is the state after the displacement in the switching value variable data of the recording acquisition unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811625550.7A CN109711573B (en) | 2018-12-28 | 2018-12-28 | Steady-state homologous data comparison method for wave recording acquisition unit and protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811625550.7A CN109711573B (en) | 2018-12-28 | 2018-12-28 | Steady-state homologous data comparison method for wave recording acquisition unit and protection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109711573A CN109711573A (en) | 2019-05-03 |
| CN109711573B true CN109711573B (en) | 2022-11-29 |
Family
ID=66259195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811625550.7A Active CN109711573B (en) | 2018-12-28 | 2018-12-28 | Steady-state homologous data comparison method for wave recording acquisition unit and protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109711573B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110940870A (en) * | 2019-10-31 | 2020-03-31 | 国网浙江省电力有限公司杭州供电公司 | Transient homologous data comparison method for solving time setting error |
| CN111458598B (en) * | 2020-02-18 | 2022-05-24 | 南京国电南自电网自动化有限公司 | Method for aligning multiple homologous recording waveforms of asynchronous sampling |
| CN112557986B (en) * | 2020-12-07 | 2022-09-13 | 国网青海省电力公司电力科学研究院 | Method and device for checking sampling precision of fault recording and computer equipment |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014049897A (en) * | 2012-08-30 | 2014-03-17 | Canon Inc | Data processing device, its control method and program |
| CN107991550A (en) * | 2017-11-13 | 2018-05-04 | 北京四方继保自动化股份有限公司 | A kind of protective device check method based on analysis with fault wave recorder |
-
2018
- 2018-12-28 CN CN201811625550.7A patent/CN109711573B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014049897A (en) * | 2012-08-30 | 2014-03-17 | Canon Inc | Data processing device, its control method and program |
| CN107991550A (en) * | 2017-11-13 | 2018-05-04 | 北京四方继保自动化股份有限公司 | A kind of protective device check method based on analysis with fault wave recorder |
Non-Patent Citations (2)
| Title |
|---|
| 智能变电站直流系统电压波形采集及处理方法;马迎新等;《电器工业》;20141105(第11期);全文 * |
| 面向故障分析的多源数据COMTRADE格式建模方法研究;陈泗贞等;《机电工程技术》;20180521(第05期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109711573A (en) | 2019-05-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109711573B (en) | Steady-state homologous data comparison method for wave recording acquisition unit and protection device | |
| US20200293033A1 (en) | Knowledge-based systematic health monitoring system | |
| CN111596170A (en) | Fault diagnosis comprehensive positioning method for intelligent distribution network | |
| CN108710099B (en) | Monitoring and alarming method and system for capacitor voltage transformer | |
| Ferreira et al. | Faults monitoring system in the electric power grid of medium voltage | |
| CN109374995B (en) | Low-voltage power distribution system, line aging and electricity stealing prevention monitoring method and corresponding system | |
| KR101778772B1 (en) | The System and Method of Detecting Events by Checking Frequency in Microgrid | |
| CN114280414A (en) | Low-voltage distribution network fault positioning system and method based on topology dynamic identification | |
| CN111044843B (en) | Power transmission line fault positioning method based on multi-source data | |
| CN108919044B (en) | Active identification method for unit distribution power grid faults based on mutual verification mechanism | |
| AU2020103307A4 (en) | Machine Learning-Based Power Quality Improvement System For Micro-Grid | |
| Jiang | Data-driven probabilistic fault location of electric power distribution systems incorporating data uncertainties | |
| Refaat et al. | Self-Healing control strategy; Challenges and opportunities for distribution systems in smart grid | |
| JP2024513381A (en) | How to identify and locate faults in medium- and low-voltage distribution networks using measurements from low-voltage parts of the distribution network | |
| CN111786462B (en) | Power grid information verification system and method based on multidimensional panoramic data | |
| Wang et al. | A linear integer programming model for fault diagnosis in active distribution systems with bi-directional fault monitoring devices installed | |
| KR102402548B1 (en) | An Automatic Monitoring and Analyzing Type of a Diagnosing System for a Protection System a Power Facility | |
| Esmail et al. | Modified autonomous fault management strategy for enhancing distribution network reliability | |
| CN113092855B (en) | Temperature monitoring method and device, double-core intelligent ammeter and storage medium | |
| Yan et al. | A modified matrix algorithm dichotomy for distribution network fault location | |
| CN104753734A (en) | Method for automatically diagnosing remote-signaling data transmission failure of power grid energy manage system | |
| CN114172262A (en) | Intelligent substation sampling data quality comprehensive evaluation method and system | |
| CN113608062A (en) | Power distribution network fault positioning method and system and fault recovery method and system | |
| KR101462229B1 (en) | Integrated data merging unit | |
| Adhikari et al. | Reliability assessment of special protection system at Kolar HVDC station |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |