CN106646114A - Fault diagnosis method of power distribution network - Google Patents
Fault diagnosis method of power distribution network Download PDFInfo
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- CN106646114A CN106646114A CN201611008725.0A CN201611008725A CN106646114A CN 106646114 A CN106646114 A CN 106646114A CN 201611008725 A CN201611008725 A CN 201611008725A CN 106646114 A CN106646114 A CN 106646114A
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- China
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- information
- fault
- current
- equipment
- switch motion
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Classifications
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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
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/086—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
Abstract
The invention relates to a fault diagnosis method of a power distribution network. The method comprises the following steps that equipment state information and switch motion information are obtained; currents, including an AC current and a zero-sequence current, of the primary side of a power transmission line are collected; the collected AC current value and zero-sequence value are compared with a preset short-circuit fault current threshold and a preset grounding fault current threshold respectively to determine present fault information; the processed equipment state information is compared with preset threshold information of a distribution terminal, and if the processed equipment state information is beyond a set range, it is determined that equipment has a fault; and the obtained switch motion information is compared with present power supply information of the power distribution network, and if the switch motion information at present is inconsistent with the power supply information, it is determined that a switch has a fault. Thus, a fault reason can be found, a fault point can be located accurately, power failure time for maintenance is reduced, the equipment utilization rate and the operational reliability are improved, and the maintenance cost is reduced.
Description
Technical field
The present invention relates to electric power network technique field, and in particular to a kind of Fault Diagnosis of Distribution Network side of Fault Diagnosis Method for Distribution Networks
Method.
Background technology
China's power distribution network has the spies such as line construction is complicated, the various changeable, faults frequent of environment is complicated, maintenance workload is big
Levy.A certain section of distribution line breaks down, and needs investigation failure paragraph by paragraph that position occurs, and not only working strength is big, but also can prolong
By mistake emergency repair time, affects power supply reliability, and in actual use, line voltage is to household electrical appliance, industrial automation equipment, medical
The normal use of the electric network terminal equipment such as instrument and meter and service life have a very big impact.At present, the fluctuation of line voltage
Larger, especially in rural area, the fluctuation of line voltage is bigger；Too high line voltage often shortens making for electric network terminal equipment
With the life-span, even burn can electric network terminal equipment sometimes；And too low line voltage is then likely to result in electric network terminal
Equipment cisco unity malfunction.Currently used detecting system and its detection method, can only be rough detect fault coverage, and
Timely and effectively failure cause and trouble point can not be confirmed and analyzed and processed.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of Fault Diagnosis Method for Distribution Networks of Fault Diagnosis Method for Distribution Networks,
The method can reduce the time that maintenance has a power failure, and improve utilization rate of equipment and installations and operational reliability, while reducing the cost of overhaul.
To solve above-mentioned technical problem, the present invention is employed the following technical solutions：
A kind of Fault Diagnosis Method for Distribution Networks, comprises the following steps：
（1）Obtain status information of equipment and switch motion information；
（2）The electric current of collection transmission line of electricity primary side, including the alternating current and zero-sequence current of primary side；
（3）The AC current values and zero-sequence current value of collection are former with short-circuit current threshold value set in advance and ground connection respectively
Barrier current threshold is compared, if the AC current values of sampling meet or exceed the short-circuit current threshold value, or ought adopt
When the zero-sequence current value of sample exceedes the earth-fault current threshold value, then can determine whether as high-voltage side fault, if it is not, then carrying out next
Step；
（4）The status information of equipment of acquisition is analyzed into process；
（5）Status information of equipment after process is compared with distribution terminal pre-set threshold value information, if exceeding setting range, is sentenced
Break as equipment fault, otherwise carry out next step
（6）Switch motion information is obtained, the multiple action of switch is judged, the multiple action of switch is integrated into a switch motion
Information；
（7）Switch motion information is currently compared with power distribution network for power information, if now switch motion information is powered with electrical network
Information is inconsistent, then be judged as switch fault；
Described Fault Diagnosis Method for Distribution Networks, the status information of equipment includes output current information, output voltage information, letter
There is information in number receive information and signal.
Described Fault Diagnosis Method for Distribution Networks, the switch motion information includes combined floodgate information, separating brake information, band telecommunications
Breath and power cut-off information.
The invention has the beneficial effects as follows：Present invention achieves effectively being monitored to whole station secondary device running status, effectively subtract
Few artificial regular inspection project, reduces the maintenance power off time of equipment, improves reliability and operating efficiency.Can accurately judge electric power simultaneously
Whether system breaks down or has a unusual service condition, therefore, it is possible to reliably to power system carry out relay protection.
Specific embodiment
A kind of Fault Diagnosis Method for Distribution Networks, comprises the following steps：
S1：Status information of equipment and switch motion information are obtained, the status information of equipment includes output current information, output voltage
There is information in information, signal receive information and signal, the switch motion information includes combined floodgate information, separating brake information, band power information
And power cut-off information.
S2：The electric current of collection transmission line of electricity primary side, including the alternating current and zero-sequence current of primary side；
S3：The AC current values and zero-sequence current value of collection are former with short-circuit current threshold value set in advance and ground connection respectively
Barrier current threshold is compared, if the AC current values of sampling meet or exceed the short-circuit current threshold value, or ought adopt
When the zero-sequence current value of sample exceedes the earth-fault current threshold value, then can determine whether as high-voltage side fault, if it is not, then carrying out next
Step；
S4：The status information of equipment of acquisition is analyzed into process；
S5：Status information of equipment after process is compared with distribution terminal pre-set threshold value information, if exceeding setting range, is sentenced
Break as equipment fault, otherwise carry out next step
S6：Switch motion information is obtained, the multiple action of switch is judged, the multiple action of switch is integrated into a switch motion
Information；
S7：Switch motion information is currently compared with power distribution network for power information, if now switch motion information is powered with electrical network
Information is inconsistent, then be judged as switch fault；
Present invention achieves effectively being monitored to whole station secondary device running status, artificial regular inspection project is effectively reduced, reduced
The maintenance power off time of equipment, improves reliability and operating efficiency.Can accurately judge simultaneously power system whether break down or
There is unusual service condition, therefore, it is possible to reliably to power system carry out relay protection.
Those skilled in the art it should be appreciated that the embodiment of the above be intended merely to explanation the present invention,
And be not used as limitation of the invention, as long as within the spirit of the present invention, being made to above example
It is appropriate to change and change all to fall within the scope of protection of present invention.
Claims (3)
1. a kind of Fault Diagnosis Method for Distribution Networks, it is characterised in that：Comprise the following steps：
（1）Obtain status information of equipment and switch motion information；
（2）The electric current of collection transmission line of electricity primary side, including the alternating current and zero-sequence current of primary side；
（3）The AC current values and zero-sequence current value of collection are former with short-circuit current threshold value set in advance and ground connection respectively
Barrier current threshold is compared, if the AC current values of sampling meet or exceed the short-circuit current threshold value, or ought adopt
When the zero-sequence current value of sample exceedes the earth-fault current threshold value, then can determine whether as high-voltage side fault, if it is not, then carrying out next
Step；
（4）The status information of equipment of acquisition is analyzed into process；
（5）Status information of equipment after process is compared with distribution terminal pre-set threshold value information, if exceeding setting range, is sentenced
Break as equipment fault, otherwise carry out next step；
（6）Switch motion information is obtained, the multiple action of switch is judged, the multiple action of switch is integrated into a switch motion
Information；
（7）Switch motion information is currently compared with power distribution network for power information, if now switch motion information is powered with electrical network
Information is inconsistent, then be judged as switch fault.
2. Fault Diagnosis Method for Distribution Networks according to claim 1, it is characterised in that：The status information of equipment includes defeated
Go out current information, output voltage information, signal receive information and signal and information occurs.
3. Fault Diagnosis Method for Distribution Networks according to claim 1, it is characterised in that：The switch motion information includes closing
Lock information, separating brake information, band power information and power cut-off information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611008725.0A CN106646114A (en) | 2016-11-16 | 2016-11-16 | Fault diagnosis method of power distribution network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611008725.0A CN106646114A (en) | 2016-11-16 | 2016-11-16 | Fault diagnosis method of power distribution network |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106646114A true CN106646114A (en) | 2017-05-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611008725.0A Pending CN106646114A (en) | 2016-11-16 | 2016-11-16 | Fault diagnosis method of power distribution network |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110380406A (en) * | 2019-07-04 | 2019-10-25 | 深圳市朝阳辉电气设备有限公司 | A kind of control method and system of power supply system |
| CN115327282A (en) * | 2022-09-13 | 2022-11-11 | 恒华数字科技集团有限公司 | Power supply system fault diagnosis method |
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| CN2729740Y (en) * | 2004-10-10 | 2005-09-28 | 广州智光电气有限公司 | Apparatus for detecting grounding fault of electric distribution network |
| CN1801574A (en) * | 2005-12-21 | 2006-07-12 | 长沙理工大学 | Transformer substation automatization system information safety protecting method based on neural network under IEC 61850 standard |
| JP2010246327A (en) * | 2009-04-09 | 2010-10-28 | Nissan Motor Co Ltd | Fault diagnostic device for inverter |
| CN102231517A (en) * | 2011-06-09 | 2011-11-02 | 航天科工深圳（集团）有限公司 | Method and system for determining and isolating power distribution network fault |
| CN103235224A (en) * | 2013-04-25 | 2013-08-07 | 国家电网公司 | Grid fault analytical method |
| CN103699664A (en) * | 2013-12-27 | 2014-04-02 | 国家电网公司 | Dynamic topology analysis method for power distribution network |
| CN105486982A (en) * | 2015-12-29 | 2016-04-13 | 安徽海兴泰瑞智能科技有限公司 | Power grid device distributed fault diagnosis method |
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2016
- 2016-11-16 CN CN201611008725.0A patent/CN106646114A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2729740Y (en) * | 2004-10-10 | 2005-09-28 | 广州智光电气有限公司 | Apparatus for detecting grounding fault of electric distribution network |
| CN1801574A (en) * | 2005-12-21 | 2006-07-12 | 长沙理工大学 | Transformer substation automatization system information safety protecting method based on neural network under IEC 61850 standard |
| JP2010246327A (en) * | 2009-04-09 | 2010-10-28 | Nissan Motor Co Ltd | Fault diagnostic device for inverter |
| CN102231517A (en) * | 2011-06-09 | 2011-11-02 | 航天科工深圳（集团）有限公司 | Method and system for determining and isolating power distribution network fault |
| CN103235224A (en) * | 2013-04-25 | 2013-08-07 | 国家电网公司 | Grid fault analytical method |
| CN103699664A (en) * | 2013-12-27 | 2014-04-02 | 国家电网公司 | Dynamic topology analysis method for power distribution network |
| CN105486982A (en) * | 2015-12-29 | 2016-04-13 | 安徽海兴泰瑞智能科技有限公司 | Power grid device distributed fault diagnosis method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110380406A (en) * | 2019-07-04 | 2019-10-25 | 深圳市朝阳辉电气设备有限公司 | A kind of control method and system of power supply system |
| CN115327282A (en) * | 2022-09-13 | 2022-11-11 | 恒华数字科技集团有限公司 | Power supply system fault diagnosis method |
| CN115327282B (en) * | 2022-09-13 | 2023-03-10 | 恒华数字科技集团有限公司 | Power supply system fault diagnosis method |
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Application publication date: 20170510 |
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