CN101995535A - Method for judging credibility of CT (Computed Tomography) secondary side short circuit - Google Patents
Method for judging credibility of CT (Computed Tomography) secondary side short circuit Download PDFInfo
- Publication number
- CN101995535A CN101995535A CN2009101018637A CN200910101863A CN101995535A CN 101995535 A CN101995535 A CN 101995535A CN 2009101018637 A CN2009101018637 A CN 2009101018637A CN 200910101863 A CN200910101863 A CN 200910101863A CN 101995535 A CN101995535 A CN 101995535A
- Authority
- CN
- China
- Prior art keywords
- circuit
- short
- confidence level
- communication module
- module
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000002591 computed tomography Methods 0.000 title abstract 8
- 238000004891 communication Methods 0.000 claims abstract description 35
- 238000001514 detection method Methods 0.000 claims description 14
- 238000011084 recovery Methods 0.000 claims description 14
- 238000012546 transfer Methods 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 abstract description 3
- 238000012545 processing Methods 0.000 abstract description 2
- 238000012216 screening Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
Images
Landscapes
- Locating Faults (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention relates to a method for judging credibility of a CT (Computed Tomography) secondary side short circuit, and belongs to the field of power system electric energy metering. At present, a traditional electric load management terminal or an electric consumption information collection terminal have the monitoring function of the CT secondary side short circuit, but the misinformation rate is very high owing to the complexity in technological realization. The method comprises the following steps of collecting CT secondary side current data at regular time, transmitting the current data to a master station communication module, storing the current data by a master station storage, and calculating the credibility x=I0/(I0+I1) and the average value of the credibility after detecting that the CT secondary side short circuit incident or short circuit is restored. By processing the short circuit and the current data in the short-circuit restore incident, the method can be used for screening out CT secondary side short-circuit users with high credibility in the electric load management system or electric consumption information collection system with lots of terminal misinformation alarms, and accurately positioning users who are possible to use electric energy illegally.
Description
[technical field]
The present invention relates to a kind of electric system electric energy metrical field, refer to a kind of method of the CT of judgement secondary circuit short-circuit confidence level especially.
[background technology]
When connecing electric access customer, need to use the detection of CT current transformer realization to user's electrical energy parameter, the short circuit of CT in use can not influence the normal operation of electrical network, but can make user's electric power meter gross error occur, this type of fault is generally the people for causing, construction wrong also this type of fault can occur, and this is unfavorable for the management of power use, and need accurately detect the short trouble of the CT secondary side of user side for this reason.At present existing electricity load management terminal or power information acquisition terminal possess the function for monitoring of CT secondary circuit short-circuit, when finding that CT secondary circuit short-circuit or short circuit recover, can report CT secondary circuit short-circuit or short circuit to recover incident.But because the complicacy that technology realizes, rate of false alarm is very high.
[summary of the invention]
In order to overcome the above-mentioned defective that exists in the prior art, the invention provides a kind of method of the CT of judgement secondary circuit short-circuit confidence level, to reduce rate of false alarm, be convenient to locate exactly the user who has stealing suspicion.For this reason, the present invention takes following technical scheme:
1, a kind of method of judging CT secondary circuit short-circuit confidence level is characterized in that it comprises the steps:
1) the current sample module timing acquiring CT secondary side current data by linking to each other with the CT current transformer;
2) current data with the collection of current sample module is sent to the master station communication module by the terminal communication module;
3) storer of main website is preserved the CT secondary side current data that the master station communication module is obtained;
4) after the impedance detection module that is positioned at terminal detects CT secondary circuit short-circuit incident, this information is sent to the master station communication module by the terminal communication module, arrives the analysis module that links to each other with the master station communication module;
5) after analysis module is received CT secondary circuit short-circuit event information, transfer the electric current I of the preceding nearest time point of short circuit in the main website storer
0Electric current I with a nearest time point after the short circuit
1, and calculate confidence level x=I
0/ (I
0+ I
1);
6) after the impedance detection module that is positioned at terminal detects CT secondary circuit short-circuit recovery incident, this information is sent to the master station communication module by the terminal communication module, arrives the analysis module that links to each other with the master station communication module;
7) after analysis module receives that the CT secondary circuit short-circuit recovers event information, transfer the electric current I of the preceding nearest time point of short circuit recovery in the main website storer
0Electric current I with the nearest time point in short circuit recovery back
1, and calculate confidence level X=I
1/ (I
0+ I
1);
8) analysis module calculates the mean value of all CT secondary circuit short-circuits and short circuit recovery incident confidence level for each terminal.
The terminal communication module that terminal includes current sample module, CT impedance detection module and links to each other with both; Main website includes the master station communication module that links to each other with the terminal communication module network, the storer of store data and the analysis module that the current data place is advanced.
The impedance of CT secondary side is instantaneous to diminish or when being lower than a setting threshold, is designated as the first short circuit incident when the impedance detection module detects; When the impedance detection module detects the instantaneous change of CT secondary side impedance greatly to setting threshold, be designated as first short circuit and recover incident, treat that the impedance detection module is judged to be after short circuit event or the short circuit recovery incident with timely notification analysis module, so that analysis module handles accordingly.Can set when the impedance detection module detects impedance and change within 1 second that to reach 50% be that short circuit or short circuit recover incident when above.
The present invention carries out analysis and judgement to short circuit event and short circuit recovery incident, to filter out CT secondary circuit short-circuit user with a high credibility, makes it to locate comparatively exactly the user who has stealing suspicion.
As the further of technique scheme improved and replenish, the present invention also comprises following additional technical feature:
It comprises that also the confidence level that analysis module calculates for each terminal carries out discriminatory analysis: when confidence level thinks credible during greater than a judgment threshold; Think insincere when confidence level is equal to or less than described judgment threshold, described judgment threshold is more than or equal to 0.6.The confidence level scope is 0-1, represents that when confidence level is 0.5 CT secondary circuit short-circuit or short circuit recover the front and back electric current and do not change (insincere).General short circuit, can cause the significant change of electric current, if current value reduces half, confidence level is exactly 1/ (0.5+1)=0.67 so, the situation intensity of variation of most short circuits is bigger, so judgment threshold can be brought up to 0.6 or more than, in addition, confidence level itself is not an absolute concepts just, it has shown believable degree, be worth big more crediblely more, when approaching 1 more, confidence level is high more; When approaching 0 more, confidence level is low more.
Analysis module carries out linear process to obtain suitable codomain scope to the confidence level after calculating.So that the management of postorder etc.
Beneficial effect: the present invention is by handling the current data in short circuit and the short circuit recovery incident, in power load management system that exists the great amount of terminals false alarm or power information acquisition system, filter out CT secondary circuit short-circuit user with a high credibility, there is the user of stealing suspicion in the location comparatively exactly.
[description of drawings]
Fig. 1 is a structure principle chart of the present invention;
Fig. 2 is a schematic flow sheet of the present invention.
[embodiment]
Below in conjunction with Figure of description technical scheme of the present invention is described in further detail.
As shown in Figure 1, the main website that the hardware that the present invention relates to comprises the terminal of tool function for monitoring, is attached thereto by network, the terminal communication module that terminal comprises the current sample module that is connected with the CT current transformer and impedance detection module, is connected with the impedance detection module with the current sample module, main website comprises the master station communication module that links to each other with the terminal communication module communication, is used for preserving the confidence level analysis module that transmits memory of data and the storer data are analyzed.
As shown in Figure 2, the present invention includes following step:
1) the current sample module timing acquiring CT secondary side current data by linking to each other with the CT current transformer;
2) current data with the collection of current sample module is sent to the master station communication module by the terminal communication module;
3) storer of main website is preserved the CT secondary side current data that the master station communication module is obtained;
4) when the impedance detection module that is positioned at terminal detect impedance instantaneous diminish or during a low setting threshold after be judged to be CT secondary circuit short-circuit incident one time, and this information is sent to the master station communication module by the terminal communication module, arrive the analysis module that links to each other with the master station communication module;
5) after analysis module is received CT secondary circuit short-circuit event information, transfer the electric current I of the preceding nearest time point of short circuit in the main website storer
0Electric current I with a nearest time point after the short circuit
1, and calculate confidence level X=I
0/ (I
0+ I
1);
6) when the impedance detection module that is positioned at terminal detects the instantaneous change of impedance greatly to setting threshold, be judged to be a CT secondary circuit short-circuit and recover incident, and this information is sent to the master station communication module by the terminal communication module, arrive the analysis module that links to each other with the master station communication module;
7) after analysis module receives that the CT secondary circuit short-circuit recovers event information, transfer the electric current I of the preceding nearest time point of short circuit recovery in the main website storer
0Electric current I with the nearest time point in short circuit recovery back
1, and calculate confidence level X=I
1/ (I
0+ I
1);
8) analysis module calculates all CT secondary circuit short-circuits and short circuit recovery incident confidence level mean value for each terminal;
9) analysis module carries out discriminatory analysis for each terminal confidence level after calculating, when confidence level thinks credible greater than 0.6; When confidence level is equal to or less than 0.6, think insincere.Certainly the confidence level judgment threshold also can suitably improve.When this step of operation, also can carry out discriminatory analysis, obtain its overall confidence level, be convenient to make reliable data to judge user's stealing possibility to the confidence level mean value of each terminal.
For obtaining suitable codomain scope, analysis module can carry out linear process to the confidence level mean value after calculating, or Nonlinear Processing.
Recover the sum of incident and the mean value of confidence level can effectively be located the user who has stealing suspicion in conjunction with short circuit event and short circuit, strengthen the management of power use.
Claims (3)
1. a method of judging CT secondary circuit short-circuit confidence level is characterized in that it comprises the steps:
1) the current sample module timing acquiring CT secondary side current data by linking to each other with the CT current transformer;
2) current data with the collection of current sample module is sent to the master station communication module by the terminal communication module;
3) storer of main website is preserved the CT secondary side current data that the master station communication module is obtained;
4) after the impedance detection module that is positioned at terminal detects CT secondary circuit short-circuit incident, this information is sent to the master station communication module by the terminal communication module, arrives the analysis module that links to each other with the master station communication module;
5) after analysis module is received CT secondary circuit short-circuit event information, transfer the electric current I of the preceding nearest time point of short circuit in the main website storer
0Electric current I with a nearest time point after the short circuit
1, and calculate confidence level x=I
0/ (I
0+ I
1);
6) after the impedance detection module that is positioned at terminal detects CT secondary circuit short-circuit recovery incident, this information is sent to the master station communication module by the terminal communication module, arrives the analysis module that links to each other with the master station communication module;
7) after analysis module receives that the CT secondary circuit short-circuit recovers event information, transfer the electric current I of the preceding nearest time point of short circuit recovery in the main website storer
0Electric current I with the nearest time point in short circuit recovery back
1, and calculate confidence level X=I
1/ (I
0+ I
1);
8) analysis module calculates the mean value of all CT secondary circuit short-circuits and short circuit recovery incident confidence level for each terminal.
2. a kind of method of judging CT secondary circuit short-circuit confidence level according to claim 1 is characterized in that the confidence level that it comprises that also analysis module calculates for each terminal carries out discriminatory analysis: when confidence level thinks credible during greater than a judgment threshold; Think insincere when confidence level is equal to or less than described judgment threshold, described judgment threshold is more than or equal to 0.6.
3. a kind of method of judging CT secondary circuit short-circuit confidence level according to claim 2 is characterized in that: analysis module carries out linear process to obtain suitable codomain scope to the confidence level after calculating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910101863.7A CN101995535B (en) | 2009-08-27 | 2009-08-27 | Method for judging credibility of CT (Computed Tomography) secondary side short circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910101863.7A CN101995535B (en) | 2009-08-27 | 2009-08-27 | Method for judging credibility of CT (Computed Tomography) secondary side short circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101995535A true CN101995535A (en) | 2011-03-30 |
| CN101995535B CN101995535B (en) | 2014-07-30 |
Family
ID=43785953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910101863.7A Active CN101995535B (en) | 2009-08-27 | 2009-08-27 | Method for judging credibility of CT (Computed Tomography) secondary side short circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101995535B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106291084A (en) * | 2012-03-15 | 2017-01-04 | 江苏省电力公司常州供电公司 | A kind of power transformer near region short circuit monitoring method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1383108A (en) * | 2002-02-04 | 2002-12-04 | 莒县电业局 | Real-time monitor and analysis system for power supply network |
| CN1632606A (en) * | 2004-12-29 | 2005-06-29 | 重庆龙源科技产业发展有限公司 | Current transformer failure metering and electric larceny proof real-time on-line detection method and apparatus |
| CN201004074Y (en) * | 2007-02-13 | 2008-01-09 | 武汉中原电子信息公司 | Multi-functional power theft prevention real time measurement and recording device |
| CN201177758Y (en) * | 2008-04-16 | 2009-01-07 | 鞍山宏信电力电源设备有限公司 | Automatic control system for electrically smelted magnesia low-frequency smelting |
| JP2009063360A (en) * | 2007-09-05 | 2009-03-26 | Kiyoko Shimizu | Energy consumption per unit monitoring system using plc communication |
-
2009
- 2009-08-27 CN CN200910101863.7A patent/CN101995535B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1383108A (en) * | 2002-02-04 | 2002-12-04 | 莒县电业局 | Real-time monitor and analysis system for power supply network |
| CN1632606A (en) * | 2004-12-29 | 2005-06-29 | 重庆龙源科技产业发展有限公司 | Current transformer failure metering and electric larceny proof real-time on-line detection method and apparatus |
| CN201004074Y (en) * | 2007-02-13 | 2008-01-09 | 武汉中原电子信息公司 | Multi-functional power theft prevention real time measurement and recording device |
| JP2009063360A (en) * | 2007-09-05 | 2009-03-26 | Kiyoko Shimizu | Energy consumption per unit monitoring system using plc communication |
| CN201177758Y (en) * | 2008-04-16 | 2009-01-07 | 鞍山宏信电力电源设备有限公司 | Automatic control system for electrically smelted magnesia low-frequency smelting |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106291084A (en) * | 2012-03-15 | 2017-01-04 | 江苏省电力公司常州供电公司 | A kind of power transformer near region short circuit monitoring method |
| CN106291084B (en) * | 2012-03-15 | 2019-03-15 | 江苏省电力公司常州供电公司 | A kind of power transformer near region short circuit monitoring method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101995535B (en) | 2014-07-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101232177B (en) | HVDC transmission line distance protecting method | |
| CN104597396B (en) | The method that detection is powered on into horizontal high voltage to electric vehicle | |
| CN104635198B (en) | Remote monitoring and diagnosing method for electric energy metering device with timely fault finding function | |
| CN104410067A (en) | Zone area power failure analyzing method based on common transformer and analysis of big data acquired by users | |
| CN106358212B (en) | The detection method and device of indoor distributed system | |
| CN104678348B (en) | Remote monitoring and diagnosing method for electric energy metering device with high efficiency | |
| CN109709854A (en) | A kind of photovoltaic plant arc fault monitoring device and method based on edge calculations | |
| CN105510760A (en) | Method for detecting short circuit fault data based on wavelet analysis | |
| CN202166714U (en) | Overhead intelligent fault indicator | |
| CN104459378A (en) | Fault diagnosis method for intelligent substation | |
| CN104714206B (en) | Remote monitoring and diagnosing method for electric energy metering device capable of finding faults timely | |
| CN105137213A (en) | Data communication real-time diagnosis system and method | |
| CN103529337B (en) | The recognition methods of nonlinear correlation relation between equipment failure and electric quantity information | |
| CN101995535B (en) | Method for judging credibility of CT (Computed Tomography) secondary side short circuit | |
| CN103399185A (en) | Computer system for preventing electricity stealing based on smart electric meters | |
| CN104614700B (en) | Remote monitoring and diagnosing method for electric energy metering device with good real-time performance | |
| CN104656050B (en) | Manpower-saving remote monitoring and diagnosing method for electric energy metering device | |
| CN104237744A (en) | Current calculating method for low power consumption of fault indicator | |
| CN106645938A (en) | Electric energy management system and method for urban rail transit | |
| CN104656052B (en) | Remote monitoring and diagnosing method for loss-reducing and efficiency-improving electric energy metering device | |
| CN104656051B (en) | Remote monitoring and diagnosing method for electric energy metering device with good real-time performance | |
| CN206640553U (en) | A kind of voltage and current detection means based on photovoltaic panel | |
| CN115808563A (en) | High-voltage user electricity stealing detection method based on electricity power abnormity analysis | |
| CN201984133U (en) | Power transmission line fault section locating system based on 3G communication network | |
| CN114578241A (en) | Storage battery online monitoring system based on Internet of things technology |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: STATE ELECTRIC NET CROP. Effective date: 20130107 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20130107 Address after: 310007 Huanglong Road, Hangzhou, Zhejiang, No. 8, No. Applicant after: Zhejiang Electric Power Company Applicant after: State Grid Corporation of China Address before: 310007 Huanglong Road, Hangzhou, Zhejiang, No. 8, No. Applicant before: Zhejiang Electric Power Company |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |