CN101452632B - Single-phase earth fault diagnostic equipment - Google Patents
Single-phase earth fault diagnostic equipment Download PDFInfo
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- CN101452632B CN101452632B CN2007101713129A CN200710171312A CN101452632B CN 101452632 B CN101452632 B CN 101452632B CN 2007101713129 A CN2007101713129 A CN 2007101713129A CN 200710171312 A CN200710171312 A CN 200710171312A CN 101452632 B CN101452632 B CN 101452632B
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- 238000012545 processing Methods 0.000 claims abstract description 45
- 238000012544 monitoring process Methods 0.000 claims abstract description 13
- 238000004891 communication Methods 0.000 claims abstract description 8
- 238000003745 diagnosis Methods 0.000 claims abstract description 5
- 230000007935 neutral effect Effects 0.000 claims description 16
- 238000005070 sampling Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 7
- 230000002950 deficient Effects 0.000 claims description 6
- 230000004044 response Effects 0.000 claims description 5
- 238000001093 holography Methods 0.000 claims description 4
- 238000013519 translation Methods 0.000 claims description 3
- 239000004973 liquid crystal related substance Substances 0.000 abstract description 2
- 238000007726 management method Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 241001269238 Data Species 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
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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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Abstract
The invention relates to a single-phase ground fault diagnosis device, which comprises a host monitoring module and slave signal acquisition and processing modules, wherein the host monitoring module is provided with a liquid crystal display, a keyboard, a human-machine interface and a communication interface of a comprehensive automatic system of a substation; the slave signal acquisition and processing modules monitor operational parameters of an electric network in real time, and find out and identify faults; the host module and the slave modules are communicated with each other through Ethernet; and the host module can drive a plurality of slave modules. Compared with the prior art, the single-phase ground fault diagnosis device can accurately identify the fault type and select grounding branch circuits.
Description
Technical field
The present invention relates to a kind of low current neutral grounding electric network single-phase earth fault diagnostic device, relate in particular to a kind of single-phase earth fault diagnostic equipment that makes full use of complete transient state of low current neutral grounding electric network and stable state information, this device is used for medium voltage distribution network.
Background technology
In medium voltage distribution network, singlephase earth fault accounts for more than 80% of total failare, when singlephase earth fault takes place, selects ground path significant to the operation management of electrical network accurately.
Existing low current neutral grounding electric network line selection apparatus often raises with neutral point of electric network voltage and is used as taking place the criterion of earth fault, but that the reason that neutral point voltage is raise has is multiple, and single-phase earthing has not necessarily taken place; In addition, present line selection apparatus sampling rate is low, is no more than 5KB/S, and acquired signal that can not be continuous, thereby can't comprehensively monitor the variation of electrical network parameter, can't make full use of stable state and the transient information of electrical network before and after breaking down and distinguish fault.
Summary of the invention
Purpose of the present invention is exactly to provide a kind of single-phase earth fault diagnostic equipment that is used for low current neutral grounding electric network for the defective that overcomes above-mentioned prior art existence, and it is the identification of defective type accurately, selects the ground connection branch road.
Purpose of the present invention can be achieved through the following technical solutions: a kind of single-phase earth fault diagnostic equipment, it is characterized in that, and comprising:
The upper monitoring module has LCD and keyboard, and man-machine interface is provided, and the communication interface with comprehensive automation system of transformer substation is provided;
The next signals collecting and processing module, this module is monitored the operation of power networks parameter in real time, finds fault, identification of defective;
The upper and lower mould interblock passes through ethernet communication;
A upper module can be with a plurality of the next modules.
Described the next signals collecting and processing module comprise signal acquisition module and signal processing module, and these two intermodules link to each other with address bus by data bus, and a signal processing module can be with a plurality of signal acquisition module.
Described signal acquisition module, its each module is supported the collection of multiple signals; The AD translation function is integrated on this module; Every road signal sampling rate is 10KB/S, and the frequency response of signal condition passage is 3KHZ; Each road signal Synchronization sampling; The signal of gathering comprises: A phase-to-ground voltage, B phase-to-ground voltage, C phase-to-ground voltage, AC line voltage, BC line voltage, AB line voltage, neutral point voltage, when electrical network neutral point current and each branch road zero-sequence current during through grounding through arc.
Described the next signals collecting and processing module, the collection of each road signal of its signal acquisition module is controlled by data and address bus by signal processing module constantly, and is read by signal processing module.
Described signal processing module can be controlled a plurality of signal acquisition module and in real time, continuously, synchronously gather each road signal; Can store the above sampled data of 10 the power frequency cycles in each road simultaneously; Has Ethernet interface; Adopt holography method to carry out fault diagnosis and route selection.
Compared with prior art, the present invention adopts multi-CPU structure, collection distributed treatment to signal, signals collecting, signal Processing, recorder data storage are assigned to different CPU with management and handled, improved the performance of system greatly, guaranteed in real time, continuously, synchronously, high sampling rate, multichannel signals collecting, make this device can adopt holographic method for diagnosing faults tracing trouble, thereby guaranteed the accuracy of fault identification and route selection based on process.
Description of drawings
Fig. 1 is a system construction drawing of the present invention;
Fig. 2 is the structural representation of the next signals collecting and processing module;
Fig. 3 is the structural representation of signal acquisition module.
Embodiment
The invention will be further described below in conjunction with accompanying drawing.
Apparatus of the present invention are made up of upper monitoring module and the next signals collecting and processing module.
The upper monitoring module has LCD and keyboard, and man-machine interface is provided, and the communication interface with comprehensive automation system of transformer substation is provided.The next signals collecting and processing module are monitored the operation of power networks parameter in real time, find fault, identification of defective.The upper and lower mould interblock is by ethernet communication, and a upper module can be with a plurality of the next modules.System architecture of the present invention as shown in Figure 1.
The next signals collecting and processing module comprise signal acquisition module and signal processing module.These two intermodules link to each other with address bus by data bus.A signal processing module can be with a plurality of signal acquisition module.The structure of the next signals collecting and processing module is as shown in Figure 2.
Each signal acquisition module is supported the collection of multiple signals; The AD translation function is integrated on this module; Every road signal sampling rate is 10KB/S, and frequency response is 3KHZ; Each road signal Synchronization sampling; The signal of gathering comprises: A phase-to-ground voltage, B phase-to-ground voltage, C phase-to-ground voltage, AC line voltage, BC line voltage, AB line voltage, neutral point voltage, neutral point current (when electrical network during through grounding through arc) and each branch road zero-sequence current.
According to the difference of acquired signal, signal acquisition module is divided into two kinds, and a kind of is the bus signal acquisition module, and another kind is the tributary signal acquisition module.Wherein, the parent segment signal acquisition module is gathered A phase-to-ground voltage, B phase-to-ground voltage, C phase-to-ground voltage, AC line voltage, BC line voltage, AB line voltage, neutral point voltage, neutral point current (when electrical network during through grounding through arc); The tributary signal acquisition module is gathered the branch road zero sequence current signal.The structure of signal acquisition module as shown in Figure 3.
The collection of each road signal of signal acquisition module is controlled by data and address bus by signal processing module constantly, and is read by signal processing module.Signal processing module can be controlled a plurality of signal acquisition module and in real time, continuously, synchronously gather each road signal; Can store the above sampled data of 10 the power frequency cycles in each road simultaneously; Signal processing module have Ethernet interface so that and the upper monitoring module communication; Signal processing module adopts holography method to carry out fault diagnosis and route selection.
Embodiment
The upper monitoring module adopts PC104 as core processor, colored liquid crystal display and keyboard, and whole module is packed 19 inches into, the high cabinet of 4U.
The next signals collecting and processing module adopt the European interpolation frame of standard, the high cabinet of 4U.Bus signal acquisition module, zero-sequence current acquisition module, signal processing module are respectively independent circuit board, and each plate links to each other by base plate, and base plate is walked data and address bus.
The bus signal acquisition module is supported A phase-to-ground voltage, B phase-to-ground voltage, C phase-to-ground voltage, AC line voltage, BC line voltage, AB line voltage, neutral point voltage, neutral point current (when's electrical network during through grounding through arc) collection.The zero-sequence current acquisition module is supported the collection of 8 road zero sequence current signals.
Signal processing module adopts the DSP of dominant frequency 600M as core processor, supports Ethernet.Going up the next module links to each other by Ethernet.
The signal condition part adopts the precision current mutual inductor for current signal, adopts accurate voltage mutual inductor to insert signal for voltage segment.The mutual inductor frequency response is 3KHZ, and measurement range wants to satisfy the requirement of on-site signal, and maximum tolerance signal should be 3 times of maximum detection amount signal.Signal conditioning circuit behind the mutual inductor need satisfy the requirement that frequency response is 3KHZ equally.
The AD modular converter adopts 16 Precision A, and frequency is 1MHZ, and the frequency of analog switch is similarly 1MHZ.
By the sampling instant of signal processing module control signal acquisition module and the passage of collection.Be specially, signal processing module starts a time management device, when sampling instant to the time multiway analog switch on the control corresponding signal acquisition module insert the signal that will gather, start the AD transfer process simultaneously, and read transformation result.
Memory headroom at signal processing module is the space that each road signal reservations can be stored 20 power frequency cycle sampled datas, forms a circulating sampling Buffer Pool, preserves up-to-date sampled data in this Buffer Pool.
Utilize the sampled data in the Buffer Pool, adopt generation, identification of defective and the route selection of holography method monitoring fault, concrete grammar repeats no more here.
When the monitoring fault takes place, signal processing module transmits recorder data by Ethernet upper monitoring module, and record in the nonvolatile memory of host computer.In the upper monitoring module, the user can check failure logging, fault waveform and fault identification result.
For one three parent segments are arranged, first parent segment has 7 branch roads, second parent segment has 16 branch roads, and the 3rd parent segment has the electrical network of 19 branch roads, can adopt a upper monitoring module and 3 the next signals collecting and processing module to realize fault identification and route selection to this electrical network.Wherein, first parent segment corresponding signal collection and processing module need a signal processing module, a bus signal acquisition module, a zero-sequence current acquisition module; Second parent segment corresponding signal collection and processing module need a signal processing module, a bus signal acquisition module, 2 zero-sequence current acquisition modules; The 3rd parent segment corresponding signal collection and processing module need a signal processing module, a bus signal acquisition module, three zero-sequence current acquisition modules.
Claims (3)
1. single-phase earth fault diagnostic equipment, it comprises:
The upper monitoring module has LCD and keyboard, and man-machine interface is provided, and the communication interface with comprehensive automation system of transformer substation is provided;
The next signals collecting and processing module, this module is monitored the operation of power networks parameter in real time, finds fault, identification of defective;
The upper and lower mould interblock passes through ethernet communication;
A upper module can be with a plurality of the next modules;
Described the next signals collecting and processing module comprise signal acquisition module and signal processing module, and these two intermodules link to each other with address bus by data bus, and a signal processing module can be with a plurality of signal acquisition module;
It is characterized in that, described signal acquisition module, its each module is supported the collection of multiple signals; The AD translation function is integrated on this module; Every road signal sampling rate is 10KB/S, and the frequency response of signal condition passage is 3KHZ; Each road signal Synchronization sampling; The signal of gathering comprises: A phase-to-ground voltage, B phase-to-ground voltage, C phase-to-ground voltage, AC line voltage, BC line voltage, AB line voltage, neutral point voltage, when electrical network neutral point current and each branch road zero-sequence current during through grounding through arc.
2. single-phase earth fault diagnostic equipment according to claim 1, it is characterized in that, described the next signals collecting and processing module, the collection of each road signal of its signal acquisition module is controlled by data and address bus by signal processing module constantly, and is read by signal processing module.
3. single-phase earth fault diagnostic equipment according to claim 1 is characterized in that, described signal processing module can be controlled a plurality of signal acquisition module and in real time, continuously, synchronously gather each road signal; Can store the above sampled data of 10 the power frequency cycles in each road simultaneously; Has Ethernet interface; Adopt holography method to carry out fault diagnosis and route selection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2007101713129A CN101452632B (en) | 2007-11-29 | 2007-11-29 | Single-phase earth fault diagnostic equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101713129A CN101452632B (en) | 2007-11-29 | 2007-11-29 | Single-phase earth fault diagnostic equipment |
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| Publication Number | Publication Date |
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| CN101452632A CN101452632A (en) | 2009-06-10 |
| CN101452632B true CN101452632B (en) | 2010-12-15 |
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| CN2007101713129A Expired - Fee Related CN101452632B (en) | 2007-11-29 | 2007-11-29 | Single-phase earth fault diagnostic equipment |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102253309B (en) * | 2011-04-29 | 2013-07-31 | 上海磁浮交通发展有限公司 | Method for determining multipoint earth faults of long stator according to line voltage |
| CN103675495A (en) * | 2012-09-17 | 2014-03-26 | 南京普爱射线影像设备有限公司 | Electronic and electrical synchronous test device |
| CN103163416B (en) * | 2013-03-28 | 2015-04-01 | 国家电网公司 | Method and device for detecting branch circuit single phase earth faults |
| CN103631245A (en) * | 2013-12-20 | 2014-03-12 | 国家电网公司 | Power distribution terminal defect diagnostic system and method |
| CN111624440A (en) * | 2020-05-26 | 2020-09-04 | 襄阳科能机电设备有限公司 | Single phase grounding fault line selection device in neutral point through arc suppression coil grounding system |
| CN112305387A (en) * | 2020-10-31 | 2021-02-02 | 贵州电网有限责任公司 | Ground insulation detection and diagnosis system |
Citations (5)
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| WO1999021152A1 (en) * | 1997-10-17 | 1999-04-29 | Polycom, Inc. | System for monitoring remote device status |
| JP2002186056A (en) * | 2000-12-19 | 2002-06-28 | Nec Corp | Measurement data collection system |
| CN2689244Y (en) * | 2004-04-28 | 2005-03-30 | 广东欧宇信息控制技术有限公司 | Transformer parameter long-range monitoring system of industrial GSM/GPRS |
| JP2005291930A (en) * | 2004-03-31 | 2005-10-20 | Chugoku Electric Power Co Inc:The | Apparatus and method for monitoring ground fault of direct current circuit |
| CN1987500A (en) * | 2006-12-21 | 2007-06-27 | 三峡大学 | On-line monitoring system method for overhead line by potential method |
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2007
- 2007-11-29 CN CN2007101713129A patent/CN101452632B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999021152A1 (en) * | 1997-10-17 | 1999-04-29 | Polycom, Inc. | System for monitoring remote device status |
| JP2002186056A (en) * | 2000-12-19 | 2002-06-28 | Nec Corp | Measurement data collection system |
| JP2005291930A (en) * | 2004-03-31 | 2005-10-20 | Chugoku Electric Power Co Inc:The | Apparatus and method for monitoring ground fault of direct current circuit |
| CN2689244Y (en) * | 2004-04-28 | 2005-03-30 | 广东欧宇信息控制技术有限公司 | Transformer parameter long-range monitoring system of industrial GSM/GPRS |
| CN1987500A (en) * | 2006-12-21 | 2007-06-27 | 三峡大学 | On-line monitoring system method for overhead line by potential method |
Non-Patent Citations (1)
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| 齐郑,杨以涵.基于Internet/intranet的小电流基地系统单相接地故障信息管理及决策支持系统.《2003中国电机工程学会电力系统自动化专委会供用电管理自动化分专业委员会成立暨第一届学术交流会议论文集》.2003,280-285. * |
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| CN101452632A (en) | 2009-06-10 |
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Owner name: JIANGXI GANDONGBEI POWER SUPPLY COMPANY SHANGHAI L Effective date: 20140103 Owner name: STATE ELECTRIC NET CROP. Free format text: FORMER OWNER: SHANGHAI LANRUI SOFTWARE TECHNOLOGY CO., LTD. Effective date: 20140103 |
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Effective date of registration: 20140103 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Patentee after: State Grid Corporation of China Patentee after: Jiangxi Northeast of Jiangxi Power Supply Company Patentee after: Shanghai Lanrui Software Technology Co., Ltd. Address before: 200240, room 106, No. 755, Lane 101, Cangyuan Road, Shanghai, Minhang District Patentee before: Shanghai Lanrui Software Technology Co., Ltd. |
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