CN106849076B - Ground fault routing alarm type mobile substation - Google Patents
Ground fault routing alarm type mobile substation Download PDFInfo
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- CN106849076B CN106849076B CN201710245916.7A CN201710245916A CN106849076B CN 106849076 B CN106849076 B CN 106849076B CN 201710245916 A CN201710245916 A CN 201710245916A CN 106849076 B CN106849076 B CN 106849076B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
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- 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
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- 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
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Locating Faults (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The utility model provides a ground fault routing alarm type mobile substation, includes first mobile device, second mobile device, input module, vary voltage module, detection protection module, output module and ground detection routing module; the ground detection routing module is electrically connected with the output module and the detection protection module, the ground detection routing module is provided with wiring ports corresponding to all output lines in the output module, the wiring ports of the ground detection routing module are correspondingly connected with the output lines in the output module, the ground detection routing module collects zero sequence current values of all the output lines, records information of each port and the collected zero sequence current values corresponding to the ports, sequentially compares the recorded zero sequence current values with preset reference zero sequence current values to generate ground fault alarm information, and provides the ground fault alarm information for the detection protection module, and the detection protection module also sends the ground fault alarm information provided by the ground detection routing module to a dispatching department of a power supply company for processing.
Description
Technical Field
The invention relates to the technical field of mobile substations, in particular to a ground fault routing alarm type mobile substation.
Background
The mobile transformer station can reach the scene and quickly recover the power supply no matter in the process of maintaining the existing transformer station and temporarily supplying power to a large building site or in the process of power failure caused by sudden natural disasters or events such as floods, fires, earthquakes and the like in cities, so that the aim of developing the driving protection for the economic society is fulfilled.
However, in the application process of the mobile substation, the situation that the ground fault occurs on the outgoing line cannot be monitored in the substation, and after the single-phase ground fault occurs on the system, a manual path pulling method is needed to determine the fault line, so that the method has a plurality of defects: each time the switch is opened and closed, impact is caused to the power grid, operation overvoltage and resonance overvoltage are easy to generate, and the service life of the switch is also reduced due to frequent switch operation; the manual way pulling and line selection greatly increases the switching and operation of operation modes by dispatching operators and transformer substation operators, prolongs the fault removal time, increases the accident probability caused by operation, greatly reduces the power supply reliability, not only causes the economic benefit of a power supply enterprise to be lost, but also causes serious consequences such as production stopping, product equipment damage and the like to power users, and even produces bad social influence.
Disclosure of Invention
In view of the foregoing, it is desirable to provide a ground fault routing alarm type mobile substation capable of detecting a specific ground fault line.
The utility model provides a ground fault routing alarm type mobile substation, includes first mobile device, second mobile device, input module, vary voltage module, detection protection module, output module and ground detection routing module; the input module and the transformation module are fixed on the first mobile device, the detection protection module, the output module and the grounding detection routing module are fixed on the second mobile device, the input module is electrically connected with the transformation module, and the input module is connected with the transformation module through 110KV voltage; the voltage transformation module is electrically connected with the output module, and is used for transforming the 110KV voltage provided by the input module to obtain the working voltage required by the urban distribution network and providing the working voltage to the output module, and the output module distributes the working voltage provided by the voltage transformation module to the power grid connected with the output module according to the urban power supply requirement; the detection protection module is electrically connected with the input module, the output module and the transformation module, monitors and protects the whole working process of the input module, the transformation module and the output module in real time, rapidly cuts off fault points when faults of the input module, the transformation module and the output module are monitored, and sends pre-stored alarm information to a dispatching department of a power supply company so that staff can maintain the fault points according to the alarm information; the ground detection routing module is electrically connected with the output module and the detection protection module, the ground detection routing module is provided with wiring ports corresponding to the output lines in the output module, the wiring ports of the ground detection routing module are correspondingly and electrically connected with the output lines in the output module, the ground detection routing module collects zero sequence current values of the output lines, records information of each port and the collected zero sequence current value corresponding to the port, compares the recorded zero sequence current values with a preset reference zero sequence current value in sequence, generates ground fault alarm information according to the recorded zero sequence current values and the port numbers corresponding to the recorded zero sequence current values when one recorded zero sequence current value is larger than the preset reference zero sequence current value, and provides the ground fault alarm information to the detection protection module, and the detection protection module also sends the ground fault alarm information provided by the ground detection routing module to a dispatching department of a power supply company so that workers can position the output line with the ground fault in the output module and maintain according to the information of the port in the ground fault alarm information.
Preferably, the detection protection module disconnects the corresponding ground fault output line according to the ground fault alarm information provided by the ground fault detection routing module.
In the above-mentioned ground fault routing alarm type mobile substation, the ground fault routing module is electrically connected with the output module and the detection protection module, the ground fault routing module has a wiring port corresponding to each output line in the output module, the wiring port of the ground fault routing module is correspondingly electrically connected with the output line in the output module, the ground fault routing module collects the zero sequence current value of the secondary loop of each output line, records the information of each port and the collected zero sequence current value corresponding to the port, compares the recorded zero sequence current value with a preset reference zero sequence current value in sequence, generates ground fault alarm information according to the recorded zero sequence current value and the port number corresponding to the recorded zero sequence current value when comparing that one recorded zero sequence current value is greater than the preset reference zero sequence current value, and provides the ground fault alarm information to the detection protection module, and the detection protection module also sends the ground fault alarm information provided by the ground fault routing module to the dispatching department of the power supply company, so that the worker positions the output line of the ground fault in the output module according to the information of the port in the ground fault alarm information.
Drawings
Fig. 1 is a schematic diagram of functional modules of a ground fault routing alarm type mobile substation according to a preferred embodiment.
Fig. 2 is a schematic structural diagram of connection between the ground detection routing module and one output line of the output modules in fig. 1.
In the figure: the system comprises a ground fault routing alarm type mobile substation 10, a first mobile device 20, a second mobile device 30, an input module 40, a transformation module 50, a detection protection module 60, an output module 70, a ground detection routing module 80, a line selection device 81, a zero sequence current acquisition device 82 and a current transformer 820.
Detailed Description
Referring to fig. 1 and 2, the ground fault routing alarm mobile substation 10 includes a first mobile device 20, a second mobile device 30, an input module 40, a transformation module 50, a detection protection module 60, an output module 70, and a ground fault detection routing module 80; the input module 40 and the transformation module 50 are fixed on the first mobile device 20, the detection protection module 60, the output module 70 and the grounding detection routing module 80 are fixed on the second mobile device 30, the input module 40 is electrically connected with the transformation module 50, and the input module 40 is connected with 110KV voltage into the transformation module 50; the voltage transformation module 50 is electrically connected with the output module 70, the voltage transformation module 50 transforms the 110KV voltage provided by the input module 40 to obtain the working voltage required by the urban distribution network, the working voltage is provided for the output module 70, and the output module 70 distributes the working voltage provided by the voltage transformation module 50 to the power grid connected with the output module 70 according to the urban power supply requirement; the detection protection module 60 is electrically connected with the input module 40, the output module 70 and the transformation module 50, the detection protection module 60 monitors and protects the whole working process of the input module 40, the transformation module 50 and the output module 70 in real time, when faults of the input module 40, the transformation module 50 and the output module 70 are monitored, fault points are quickly cut off, pre-stored alarm information is sent to a dispatching department of a power supply company, and therefore workers can maintain the fault points according to the alarm information; the ground fault detection routing module 80 is electrically connected with the output module 70 and the detection protection module 60, the ground fault detection routing module 80 is provided with a wiring port corresponding to each output line in the output module 40, the wiring port of the ground fault detection routing module 80 is correspondingly electrically connected with the output line in the output module 70, the ground fault detection routing module 80 collects zero sequence current values of each output line, records information of each port and the collected zero sequence current value corresponding to the port, compares the recorded zero sequence current values with preset reference zero sequence current values in sequence, generates ground fault alarm information according to the recorded zero sequence current values and port numbers corresponding to the recorded zero sequence current values when one recorded zero sequence current value is larger than the preset reference zero sequence current value, and provides the ground fault alarm information to the detection protection module 60, and the detection protection module 60 also transmits the ground fault alarm information provided by the ground fault detection routing module 80 to a dispatching department of a power supply company so that workers can position the output line with the ground fault in the output module 70 according to the information of the port in the ground fault alarm information. The first mobile device 20, the second mobile device 30 may be an automobile.
Further, the detection protection module 60 disconnects the corresponding ground fault output line according to the ground fault alarm information provided by the ground fault detection routing module 80.
Further, the ground fault detection routing module 80 includes a line selection device 81 and a zero sequence current collection device 82, the line selection device 81 has a number of connection ports corresponding to each output line in the output module 40, the number of the zero sequence current collection devices 82 corresponds to the number of connection ports of the line selection device 81, each connection port of the line selection device 81 is electrically connected with a corresponding one of the zero sequence current collection devices 82, each zero sequence current collection device 82 corresponds to one of the output lines in the output module 70, the zero sequence current collection device 82 collects the output line of the output module 70 connected with the output line and generates a corresponding zero sequence current value, the corresponding connection port of the line selection device 81 receives the zero sequence current value generated by the zero sequence current collection device 82, the line selection device 81 records information of each port and the collected zero sequence current value corresponding to the port, compares the recorded zero sequence current value with a preset reference zero sequence current value in sequence, generates ground fault alarm information according to the recorded zero sequence current value and the corresponding port number when one of the compared zero sequence current values is greater than the preset reference current value, and provides the ground fault alarm information to the ground fault protection module 60.
The zero sequence current collection device 82 is composed of three current transformers 820, a primary side of each current transformer 820 is correspondingly and electrically connected with three phase lines of one output line, a secondary side of each current transformer 820 is electrically connected with the line selection device 81, the current flowing through the three phase lines of the output line is induced by the current transformers 820, corresponding induced currents are generated, the generated induced currents are provided for the line selection device 81, and the line selection device 81 records the received induced currents as zero sequence current values after superposition.
Claims (4)
1. The utility model provides a ground fault routing warning formula mobile substation which characterized in that: the device comprises a first automobile, a second automobile, an input module, a transformation module, a detection protection module, an output module and a grounding detection routing module; the input module and the transformation module are fixed on a first automobile, the detection protection module, the output module and the grounding detection routing module are fixed on a second automobile, the input module is electrically connected with the transformation module, and the input module is connected with the transformation module through 110KV voltage; the voltage transformation module is electrically connected with the output module, and is used for transforming the 110KV voltage provided by the input module to obtain the working voltage required by the urban distribution network and providing the working voltage to the output module, and the output module distributes the working voltage provided by the voltage transformation module to the power grid connected with the output module according to the urban power supply requirement; the detection protection module is electrically connected with the input module, the output module and the transformation module, monitors and protects the whole working process of the input module, the transformation module and the output module in real time, rapidly cuts off fault points when faults of the input module, the transformation module and the output module are monitored, and sends pre-stored alarm information to a dispatching department of a power supply company so that staff can maintain the fault points according to the alarm information; the ground detection routing module is electrically connected with the output module and the detection protection module, the ground detection routing module is provided with wiring ports corresponding to the output lines in the output module, the wiring ports of the ground detection routing module are correspondingly and electrically connected with the output lines in the output module, the ground detection routing module collects zero sequence current values of the output lines, records information of each port and the collected zero sequence current value corresponding to the port, compares the recorded zero sequence current values with a preset reference zero sequence current value in sequence, generates ground fault alarm information according to the recorded zero sequence current values and the port numbers corresponding to the recorded zero sequence current values when one recorded zero sequence current value is larger than the preset reference zero sequence current value, and provides the ground fault alarm information to the detection protection module, and the detection protection module also sends the ground fault alarm information provided by the ground detection routing module to a dispatching department of a power supply company so that workers can position the output line with the ground fault in the output module and maintain according to the information of the port in the ground fault alarm information.
2. The ground fault routing alert mobile substation of claim 1, wherein: the detection protection module disconnects the corresponding ground fault output line according to the ground fault alarm information provided by the ground fault detection routing module.
3. The ground fault routing alert mobile substation of claim 2, wherein: the grounding detection routing module comprises a line selection device and a zero sequence current acquisition device, wherein the line selection device is provided with wiring ports corresponding to the output lines in the output module, the number of the zero sequence current acquisition devices corresponds to the number of the wiring ports of the line selection device, each wiring port of the line selection device is electrically connected with a corresponding zero sequence current acquisition device, each zero sequence current acquisition device corresponds to one output line in the output module and is electrically connected with the output line of the output module, the zero sequence current acquisition device acquires the output line of the output module connected with the zero sequence current acquisition device and generates a corresponding zero sequence current value, the corresponding wiring port of the line selection device receives the zero sequence current value generated by the zero sequence current acquisition device, the line selection device records the information of each port and the acquired zero sequence current value corresponding to the port, the recorded zero sequence current value is sequentially compared with a preset reference zero sequence current value, and when one recorded zero sequence current value is larger than the preset reference zero sequence current value, grounding fault alarm information is generated according to the recorded zero sequence current value and the port number corresponding to the recorded zero sequence current value, and the ground fault alarm information is provided to the detection protection module.
4. A ground fault routing alert mobile substation as in claim 3, wherein: the zero sequence current acquisition device consists of three current transformers, wherein the primary side of each current transformer is correspondingly and electrically connected with the three phase line of one output line, the secondary side of each current transformer is electrically connected with the line selection device, the current flowing through the three phase line of the output line is induced by the current transformer, the corresponding induced current is generated, the generated induced current is provided for the line selection device, and the line selection device is used for recording the zero sequence current value after the received induced currents are overlapped.
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| CN201710245916.7A CN106849076B (en) | 2017-04-14 | 2017-04-14 | Ground fault routing alarm type mobile substation |
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| CN201710245916.7A CN106849076B (en) | 2017-04-14 | 2017-04-14 | Ground fault routing alarm type mobile substation |
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Citations (6)
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| WO2014063570A1 (en) * | 2012-10-24 | 2014-05-01 | 国家电网公司 | Method for on-line diagnosing gradually-changing fault of electronic current transformers |
| CN103926507A (en) * | 2014-04-09 | 2014-07-16 | 东南大学 | Method for diagnosing turn-to-turn short circuit faults of permanent magnet synchronous motor in delta connection mode |
| WO2014154164A1 (en) * | 2013-03-29 | 2014-10-02 | 北京映翰通网络技术股份有限公司 | Method and system for detecting and locating single-phase ground fault on low current grounded power-distribution network |
| CN105356441A (en) * | 2015-11-17 | 2016-02-24 | 国网冀北电力有限公司张家口供电公司 | Intelligent PT harmonic elimination and phase selection method and device |
| CN106410885A (en) * | 2016-06-29 | 2017-02-15 | 常熟市立得电器有限公司 | Charging controller for electric vehicle |
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2017
- 2017-04-14 CN CN201710245916.7A patent/CN106849076B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014063570A1 (en) * | 2012-10-24 | 2014-05-01 | 国家电网公司 | Method for on-line diagnosing gradually-changing fault of electronic current transformers |
| CN203164356U (en) * | 2013-03-06 | 2013-08-28 | 华北电力大学 | Embedded mainboard-based cable fault positioning device |
| WO2014154164A1 (en) * | 2013-03-29 | 2014-10-02 | 北京映翰通网络技术股份有限公司 | Method and system for detecting and locating single-phase ground fault on low current grounded power-distribution network |
| CN103926507A (en) * | 2014-04-09 | 2014-07-16 | 东南大学 | Method for diagnosing turn-to-turn short circuit faults of permanent magnet synchronous motor in delta connection mode |
| CN105356441A (en) * | 2015-11-17 | 2016-02-24 | 国网冀北电力有限公司张家口供电公司 | Intelligent PT harmonic elimination and phase selection method and device |
| CN106410885A (en) * | 2016-06-29 | 2017-02-15 | 常熟市立得电器有限公司 | Charging controller for electric vehicle |
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| CN106849076A (en) | 2017-06-13 |
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Address after: 750000 Xinchang East Road, Yinchuan, the Ningxia Hui Autonomous Region 222 Applicant after: State Grid Ningxia Electric Power Co. Address before: No. 222, East Xinchang Road, Jinfeng District, Yinchuan City, Ningxia Hui Autonomous Region Applicant before: YINCHUAN POWER SUPPLY COMPANY OF STATE GRID NINGXIA ELECTRIC POWER CO. |
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