CN108666992B - Power grid fault comprehensive analysis platform and working method - Google Patents
Power grid fault comprehensive analysis platform and working method Download PDFInfo
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- CN108666992B CN108666992B CN201810488231.XA CN201810488231A CN108666992B CN 108666992 B CN108666992 B CN 108666992B CN 201810488231 A CN201810488231 A CN 201810488231A CN 108666992 B CN108666992 B CN 108666992B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/28—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured for meshed systems
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Abstract
The invention discloses a power grid fault comprehensive analysis platform and a working method, wherein the working method comprises the following steps: the method comprises the following steps that firstly, a fault analysis module acquires fault information aiming at a single interval, recorded by a protection device, from a signal protection system; secondly, the fault analysis module acquires waveform data of the electric quantity of the power grid during the fault period from the fault recording device; thirdly, all fault-related waveform data are put on the same time axis for displaying; and step four, judging the fault area and the property according to the change condition of each electrical element during the grid fault. The method has important significance for improving the working efficiency of fault treatment, recovering the system power supply as soon as possible, reducing the comprehensive economic loss caused by power failure and improving the safe, stable and economic operation level of the whole power system.
Description
Technical Field
The invention relates to the technical field of power grid fault analysis, in particular to a power grid fault comprehensive analysis platform and a working method.
Background
The analysis of the power grid fault information is always a very important work of a dispatching unit, and the action report of the protection and the wave recorder printed from the early stage to the transformer substation site is transmitted to the fault information remote transmission push report at the later stage, and the points are relatively independent systems and points which are rarely associated with each other and are relatively labored to analyze. In recent years, dispatching units begin to try to fuse multiple systems and fuse information after faults, but the effect of fusion is not good at present, and the two reasons are as follows:
firstly, communication protocols and data formats of all equipment and systems are inconsistent, the development period involved in the fusion process is long, and multiple manufacturers are required to cooperate;
secondly, the generation of a fault report lacks of preprocessing problem, once a fault occurs, all protection, oscillographs and traveling waves in the jurisdiction almost act, and in addition, the time scale is disordered, useful fault information is always submerged in massive data, and effective support information cannot be improved;
and thirdly, the fusion of the fault reports is only to list and sort the information points, and does not really enter an analysis stage, relating to the formatting and normalization of the data formats of multiple manufacturers.
Disclosure of Invention
The invention aims to solve the problems and provides a power grid fault comprehensive analysis platform and a working method, which are used for displaying all fault-related waveform data on the same time axis and reflecting the change conditions of each electrical element during the power grid fault so as to judge the fault area and the fault property.
In order to achieve the purpose, the invention adopts the following technical scheme:
the working method of the power grid fault comprehensive analysis platform comprises the following steps:
the method comprises the following steps that firstly, a fault analysis module acquires fault information aiming at a single interval, recorded by a protection device, from a signal protection system;
secondly, the fault analysis module acquires waveform data of the electric quantity of the power grid during the fault period from the fault recording device;
thirdly, all fault-related waveform data are put on the same time axis for displaying;
and step four, judging the fault area and the property according to the change condition of each electrical element during the grid fault.
The fault analysis module acquires models and incidence relations of the primary equipment and the secondary equipment from the information protection system, acquires fault information of action events, switch deflection and wave recording data of the protection device after a power grid fails, automatically matches the fault information of the fault wave recording device, and integrates all related information of the primary power grid faults.
And C, packaging and accessing the fault area and property fault data obtained by analyzing in the step four into the conventional power grid technological innovation platform for displaying, and issuing the fault data to a mass data platform to realize data sharing.
And pushing the fault area and property fault data obtained in the step four to the mobile equipment to analyze the power grid fault on the tablet computer or the mobile phone.
And the direct current channel data recorded by the fault recording device are analyzed, and the direct current operating voltage of the bus in the station is monitored and analyzed, so that the bus direct current voltage warning function is realized.
The judging method of the fourth step comprises the following steps:
the method comprises the steps that the names of access interval channels, CT polarities and transformation ratio coefficients of a fault recording device are adjusted remotely through a dispatching master station, and the difference flow calculation values of all power transmission and transformation equipment are close to zero when a power grid operates normally;
when the power grid fails, the difference current of the primary current of the power grid is calculated by taking the power grid independent equipment as a calculation unit according to fault data sent by a fault recording device;
and comparing the obtained differential flow value with the differential flow setting value to realize accurate fault position positioning and protection action evaluation.
The power grid fault comprehensive analysis platform adopting the working method of the power grid fault comprehensive analysis platform comprises a fault analysis module, wherein the fault analysis module is communicated with a security system and at least one fault recording device in at least one transformer substation, the security system is in data interaction with a data center in a region III, and the data center in the region III is communicated with a mobile terminal through an SOA server; and the fault recording devices in the transformer substation are independently networked through a dispatching data network.
The fault analysis module comprises a network switch A and a network switch B, and at least one workstation, a first application server, a data server and a communication server are communicated with the network switch A and the network switch B; and the first application server performs data interaction with the information protection system.
The information protection system comprises a second application server, and the second application server sends a protection action event and a recording to the first application server; and the first application server sends the fault comprehensive analysis data packet to a WEB server through a forward isolation device of the power network, and the WEB server stores the data in the data center of the area III.
The communication server is also communicated with the traveling wave distance measuring device and the low-current grounding line selection device.
The invention has the beneficial effects that:
the method has important significance for improving the working efficiency of fault treatment, recovering the system power supply as soon as possible, reducing the comprehensive economic loss caused by power failure and improving the safe, stable and economic operation level of the whole power system.
The comprehensive analysis system for the power grid faults is a distributed system for intelligent information acquisition, collection, organic integration, fault identification and decision support. The control and monitoring information of the transformer substation is strictly managed according to the hierarchical levels, the data flow direction is optimized, the occupation of a data network channel is reduced, and the reliable operation of the system is improved.
Various types of simulation training are developed through the platform system, so that the influence of the traditional on-site training on normal production work can be avoided, more importantly, the simulation training can be repeatedly carried out for many times, the process is knocked, the occurrence of accidents is reduced, and the economic loss is reduced.
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FIG. 1 is a system block diagram of the present invention.
Detailed Description
The invention is further described with reference to the following figures and examples.
The power grid fault comprehensive analysis platform comprises a fault analysis module, wherein the fault analysis module is communicated with a security system and at least one fault recording device in at least one transformer substation, the security system is in data interaction with a data center in a region III, and the data center in the region III is communicated with a mobile terminal through an SOA server; and the fault recording devices in the transformer substation are independently networked through a dispatching data network. The method has the advantages that networking of fault recording devices of different manufacturers and models is achieved, the problems that protocols are not uniform and data formats are not standard are solved, a universal recording data acquisition platform is designed and achieved, and a uniform interface is provided for accessing various types of equipment.
The invention provides technical support for dispatching and other departments to improve the fault analysis and processing capacity. When a complex fault occurs in a power grid, multiple sets of protection devices are tripped, the system is based on fault recording data and combines the existing technical support systems such as a communication protection system to make timely and accurate judgment on a fault area and fault properties, and a basis is provided for quick power restoration.
The fault analysis module comprises a network switch A and a network switch B, and at least one workstation, a first application server, a data server and a communication server are communicated with the network switch A and the network switch B; and the first application server performs data interaction with the information protection system.
The information protection system comprises a second application server, and the second application server sends a protection action event and a recording to the first application server; and the first application server sends the fault comprehensive analysis data packet to a WEB server through a forward isolation device of the power network, and the WEB server stores the data in the data center of the area III.
The communication server is also communicated with the traveling wave distance measuring device and the low-current grounding line selection device.
A working method of a power grid fault comprehensive analysis platform,
acquiring fault information recorded by a protection device for a single interval from a security system;
the method comprises the steps of obtaining change information of the electric quantity of the power grid during the fault period from a fault recording device, displaying all fault-related waveform data on the same time axis from a plurality of recording files without depending on device clocks or being influenced by device sampling mode differences, and reflecting the change conditions of all electric elements during the fault period of the power grid so as to judge fault areas and properties.
The fault analysis module and the information protection system are used as data interfaces to obtain models and incidence relations of the primary equipment and the secondary equipment, fault information such as action events, switch deflection and wave recording data of the protection device is obtained after the power grid fails, the fault information is automatically matched with wave recording information of the fault wave recording equipment, and all relevant information of the primary power grid faults are integrated together. And the original isolation device and the III-area server are utilized to realize data butt joint. Meanwhile, fault data and common functions are packaged and accessed to a Hainan power grid technological innovation platform for displaying, the fault data are issued to a mass data platform, data sharing is achieved, a fault report is pushed to mobile equipment, and the function of analyzing power grid faults on a tablet or a mobile phone is achieved.
The system can synthesize the fault information of the in-station fault recording device, the information protection main station system and the traveling wave distance measuring device, quickly judge the type of the power grid fault, realize fault positioning and automatically give a fault analysis report.
The method for rapidly positioning and intelligently diagnosing the fault of the large-scale power grid fault area comprises the following steps: when the power grid normally operates, fault recording sampling is automatically called at fixed time intervals, phase current differential values are calculated by taking power transmission and transformation equipment as units, and the differential value is almost zero. If the difference flow calculation value is larger than the difference flow threshold value of the corresponding equipment (the difference flow threshold value of each equipment is set as the maximum difference flow value possibly caused by factors such as unbalanced load, CT errors and the like when the power grid is in the maximum operation mode), the scheduling master station is used for remotely adjusting the access interval channel name, the CT polarity and the transformation ratio coefficient of the fault recorder, and the difference flow calculation values of all power transmission and transformation equipment are close to zero when the power grid is in normal operation. When the power grid has a fault, the differential current of the primary current of the power grid is calculated by respectively taking the power grid independent equipment as a calculation unit according to fault data sent by a fault recorder; and comparing the differential flow value with the differential flow setting value to realize accurate fault position positioning and protection action behavior evaluation.
The power grid fault comprehensive analysis platform can realize the functions of accident decision support, protection action behavior analysis and equipment state monitoring, and comprises quick fault positioning, real-time secondary equipment monitoring and intelligent fault diagnosis; displaying fault information in a multi-dimensional mode and comprehensively recording a wave chart; and auxiliary functions such as device operation condition and log management.
The fault waveforms recorded by a plurality of different protection devices and fault recording devices are put on the same time axis for displaying, and the change condition and the protection action condition of the related electrical elements during the fault occurrence period are reflected. The traditional wave recording display method can display a single fault waveform recorded by one device, a plurality of different devices can generate wave recording data in the power failure occurrence process, a plurality of wave recording display windows need to be opened when the data are analyzed, and the following problems exist during display: the clocks of the devices are not consistent, and the waveforms at the fault time cannot be aligned; the waveform display cannot be aligned on the same time axis due to different sampling frequencies and different recording compression modes of the device. Especially complicated trouble, time span is big, and same device also can start many times and produce the record wave, and traditional record wave show can't show the development process of trouble on same time axis. The research method aims at the problems and provides a solution for displaying, comparing and analyzing single-time recording data or a plurality of times of recording data from a plurality of devices under the same time coordinate by using a comprehensive recording chart.
The monitoring, analysis and alarm of the DC bus operating voltage in the station are realized by analyzing the DC channel data recorded by the wave recording device.
And evaluating the running state of the DC system in the station by analyzing the DC channel data recorded by the wave recording device. The direct current in the station is also required to be accessed into the wave recording device by the access specification of the current fault wave recording device, the state of the current direct current power supply system on site can be obtained by adopting a manual wave recording mode, and the running state of the direct current system is judged according to the analysis waveform data.
The direct current running voltage of the bus in the station is monitored and analyzed by analyzing the medium direct current channel data recorded by the wave recording device, so that the function of bus direct current voltage warning is realized.
The invention provides powerful basis and guarantee for rapidly and accurately eliminating the power grid fault, and provides a one-stop solution for accident decision and operation and maintenance personnel for fault analysis for the regulation and control personnel.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.
Claims (8)
1. The working method of the power grid fault comprehensive analysis platform is characterized by comprising the following steps of:
the method comprises the following steps that firstly, a fault analysis module acquires fault information aiming at a single interval, recorded by a protection device, from a signal protection system;
secondly, the fault analysis module acquires waveform data of the electric quantity of the power grid during the fault period from the fault recording device;
thirdly, all fault-related waveform data are put on the same time axis for displaying;
judging a fault area and properties according to the change condition of each electrical element during the fault period of the power grid, and remotely adjusting the access interval channel name, the CT polarity and the transformation ratio coefficient of the fault recording device through a dispatching master station to ensure that the differential current calculation values of all power transmission and transformation equipment are close to zero when the power grid normally runs; when the power grid fails, the difference current of the primary current of the power grid is calculated by taking the power grid independent equipment as a calculation unit according to fault data sent by a fault recording device; comparing the obtained differential flow value with a differential flow setting value to realize accurate fault position positioning and protection action evaluation;
the fault analysis module acquires models and incidence relations of the primary equipment and the secondary equipment from the information protection system, acquires fault information of action events, switch deflection and waveform data of the protection device after a power grid fails, automatically matches the fault information with recording information of the fault recording device, and integrates all related information of the primary power grid faults.
2. The working method of the power grid fault comprehensive analysis platform as claimed in claim 1, wherein the fault data including the fault area and the nature obtained by the analysis in the step four are packaged and accessed to the existing power grid scientific and technological innovation platform for display, and the fault data are issued to the mass data platform to realize data sharing.
3. The working method of the power grid fault comprehensive analysis platform as claimed in claim 1, wherein the fault data including the fault area and the nature in the step four is pushed to a mobile device to realize the analysis of the power grid fault on a tablet computer or a mobile phone.
4. The operating method of the grid fault comprehensive analysis platform according to claim 1, further comprising monitoring and analyzing the dc operating voltage of the bus in the station by analyzing the dc channel data recorded by the fault recorder, so as to implement the bus dc voltage alarm function.
5. The power grid fault comprehensive analysis platform adopting the working method of the power grid fault comprehensive analysis platform as claimed in claim 1, which is characterized by comprising a fault analysis module, wherein the fault analysis module is communicated with a security system and at least one fault recording device in at least one transformer substation, the security system is in data interaction with a data center in a region III, and the data center in the region III is communicated with a mobile terminal through an SOA server; and the fault recording devices in the transformer substation are independently networked through a dispatching data network.
6. The grid fault comprehensive analysis platform according to claim 5, wherein the fault analysis module comprises a network switch A and a network switch B, and at least one of the workstation, the first application server, the data server and the communication server is in communication with the network switch A and the network switch B; and the first application server performs data interaction with the information protection system.
7. The grid fault analysis integrated platform of claim 6, wherein the protection system comprises a second application server, the second application server sending protection action events and waveform data of protection devices to the first application server; and the first application server sends the fault comprehensive analysis data packet to a WEB server through a forward isolation device of the power network, and the WEB server stores the data in the data center of the area III.
8. The grid fault analysis platform of claim 6, wherein the communication server is further in communication with a traveling wave ranging device and a low current ground selection device.
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| CN109447452B (en) * | 2018-10-23 | 2022-02-11 | 国网天津市电力公司 | Online testing method for batch control function of D5000 system load |
| CN109696591B (en) * | 2018-11-30 | 2021-07-30 | 南京国电南自电网自动化有限公司 | Testing method for intelligently acquiring fault recording based on ATS automatic testing platform |
| CN109800893B (en) * | 2018-12-25 | 2021-07-23 | 国家电网公司东北分部 | WEB webpage publishing method for fault information and secondary equipment operation and maintenance management information |
| CN109544044B (en) * | 2018-12-28 | 2023-04-07 | 云南电网有限责任公司玉溪供电局 | Wide-area power quality evaluation system based on fault recording big data driving |
| CN109584103A (en) * | 2018-12-28 | 2019-04-05 | 广西电网有限责任公司防城港供电局 | A kind of electric network fault fast reaction and educated decisions support system |
| CN110739770B (en) * | 2019-10-15 | 2023-03-24 | 云南电网有限责任公司 | Relay protection tube control system based on information fusion |
| CN110889602B (en) * | 2019-11-13 | 2022-04-15 | 云南电网有限责任公司 | Relay protection multi-source master station fusion decision rapid support system and method thereof |
| CN114236309A (en) * | 2021-11-30 | 2022-03-25 | 国网北京市电力公司 | Power transmission and transformation fault determination method |
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| CN106208368B (en) * | 2016-07-07 | 2019-01-08 | 广东电网有限责任公司电力调度控制中心 | A kind of Transformer Faults Analysis system and method based on dispatching comprehensive data platform |
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Effective date of registration: 20231219 Address after: No. 32 Haifu Road, Haikou City, Hainan Province, 571100 Patentee after: HAINAN POWER GRID Co.,Ltd. Patentee after: Hainan Electric Power Industry Development Co.,Ltd. Address before: No.32, Haifu Road, Haikou, Hainan 570203 Patentee before: HAINAN POWER GRID Co.,Ltd. |