CN103760456B - Electrical network capacitance type equipment insulation based on rough set theory monitoring system - Google Patents

Electrical network capacitance type equipment insulation based on rough set theory monitoring system Download PDF

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Publication number
CN103760456B
CN103760456B CN201310752889.4A CN201310752889A CN103760456B CN 103760456 B CN103760456 B CN 103760456B CN 201310752889 A CN201310752889 A CN 201310752889A CN 103760456 B CN103760456 B CN 103760456B
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China
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module
signal
electrical network
capacitance type
type equipment
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CN201310752889.4A
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Chinese (zh)
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CN103760456A (en
Inventor
张克贵
贺伟
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合肥天海电气技术有限公司
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Publication of CN103760456A publication Critical patent/CN103760456A/en
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Abstract

The invention discloses a kind of electrical network capacitance type equipment insulation based on rough set theory monitoring system, include signal transmitting module, signal processing module, data acquisition module, signal transmission module and insulation pre-diagnostic alarms module.The present invention can analyze and process the sign inaccuracy of electrical network capacitance type equipment insulation state, the inconsistent and incomplete data of sensor acquisition effectively, electrical network capacitance type equipment insulation state can be provided effective monitoring and early warning, improve the utilization rate of electrical network capacitance type equipment, saved the substantial amounts of cost of overhaul for electric power enterprise and used.

Description

Electrical network capacitance type equipment insulation based on rough set theory monitoring system
Technical field
The present invention relates to the type insulation monitoring system field of capacitance type equipment, a kind of based on rough set theory Electrical network capacitance type equipment insulation monitoring system.
Background technology
Along with power system is to high voltage, Large Copacity, internet development, to Power System Security And Reliability index Requirement more and more higher, the limitation of tradition preventive trial is more obvious, and on-line insulation monitoring is Under conditions of the equipment that do not affects runs, the monitoring carried out status of equipment continuously or regularly, this monitoring is certainly Dynamic carrying out, it can carry out real-time inspection and monitor operating state equipment, improves equipment utilization Rate, can be that electric power enterprise saves a large amount of costs of overhaul use.
The insulating monitoring of electrical network capacitance type equipment needs to analyze substantial amounts of data signal quickly and accurately to sentence Disconnected, thus take corresponding effective measures.In order to improve accuracy and the rapidity of insulation tube arrester, at present Have been introduced into the intelligent algorithms such as specialist system, artificial neural network, genetic algorithm and petri net, these Method can obtain greatly more satisfied result to accurate, the complete signal delivering to control centre, but not Determine, under fault diagnosis model that incomplete signal etc. is complicated, there is no adequate solution method at present.
And rough set theory has stronger fault-tolerant ability, when its great advantage is to need not provide Solve problems The required any prior information processed outside data acquisition system, can analyze and process inaccuracy, inconsistent etc. effectively Various incomplete datas.Visible, develop a kind of electrical network capacitance type equipment insulation based on rough set theory prison Examining system is a great realistic meaning and the work of economic worth.
Summary of the invention
The object of the invention is contemplated to make up the defect of prior art, it is provided that a kind of electrical network based on rough set theory Capacitance type equipment insulation monitoring system.
Technical scheme is as follows:
A kind of electrical network capacitance type equipment insulation based on rough set theory monitoring system, it is characterised in that: include The pre-diagnostic alarms of signal transmitting module, signal processing module, data acquisition module, signal transmission module and insulation Module;Described signal transmitting module includes low current sensor and voltage transformer, low current sensor and Voltage transformer detects the three-phase reflecting this electrical network capacitance type equipment insulation state from electrical network capacitance type equipment Voltage, leakage current and three kinds of physical quantitys of dielectric loss, and above-mentioned three kinds of physical quantitys are converted to suitable telecommunications Described signal processing module it is sent to after number;Described signal transmitting module is inputted by described signal processing module The signal of telecommunication carry out pretreatment after be sent to described data acquisition module, simultaneously defeated to described signal transmitting module The signal of telecommunication entered is filtered protecting with antisurge;Described data acquisition module is defeated to described signal processing module The signal of telecommunication through pretreatment entered is acquired, A/D changes and is sent to described signal transmission mould after record Block;Signal transmission module by described data collecting module collected to the signal of telecommunication be sent to described insulation and diagnose in advance Alarm module;The data that described signal transmission module is inputted by the pre-diagnostic alarms module that insulate process, and utilize The Method of Decision Table Reduction of rough set theory carries out insulation tube arrester, corresponding to the output of electrical network capacitance type equipment Alarm control signal.
Described electrical network capacitance type equipment insulation based on rough set theory monitoring system, it is characterised in that: described Insulation pre-diagnostic alarms module include host computer and alarm relay, wherein host computer receives described signal and passes The data of defeated module input, run the pre-diagnostic software that insulate and are analyzed judging, control to report to the police according to judged result Relay cut-offs, and exports corresponding alarm control signal to electrical network capacitance type equipment.
Beneficial effects of the present invention:
The present invention can analyze and process the electrical network capacitance type equipment insulation state that characterizes of sensor acquisition effectively Inaccuracy, inconsistent and incomplete data, electrical network capacitance type equipment insulation state can be provided effective monitoring and Early warning, improves the utilization rate of electrical network capacitance type equipment, has saved the substantial amounts of cost of overhaul for electric power enterprise and has used.
Accompanying drawing explanation
Fig. 1 is present configuration theory diagram.
Fig. 2 is the rough set method flow chart of electrical network capacitance type equipment insulation fault diagnosis of the present invention.
Detailed description of the invention
See Fig. 1, a kind of electrical network capacitance type equipment insulation based on rough set theory monitoring system, include letter Number transmitting module 1, signal processing module 2, data acquisition module 3, signal transmission module 4 and insulation are examined in advance Disconnected alarm module 5;Signal transmitting module 1 includes low current sensor and voltage transformer, micro-current sense Device and voltage transformer detect this electrical network capacitance type equipment insulation state of reflection from electrical network capacitance type equipment 6 Three-phase voltage, leakage current and three kinds of physical quantitys of dielectric loss, and above-mentioned three kinds of physical quantitys are converted to properly The signal of telecommunication after be sent to signal processing module 2, the signal of telecommunication is played a part observation and reading simultaneously;Signal Processing module 2 is sent to data acquisition module after the signal of telecommunication that signal transmitting module 1 inputs is carried out pretreatment 3, utilize EMC technology that the signal of telecommunication that signal transmitting module 1 inputs is filtered and antisurge protection simultaneously, Interference signal in the signal of telecommunication of signal transmitting module 1 input is suppressed;Data acquisition module 3 is to signal The signal of telecommunication through pretreatment of processing module 2 input is acquired, A/D changes and is sent to signal after record Transport module 4;The signal of telecommunication that data acquisition module 3 is collected by signal transmission module 4 passes through RS485 interface It is sent to the pre-diagnostic alarms module 5 that insulate;Insulate what signal transmission module 4 was inputted by pre-diagnostic alarms module 5 Data process, and utilize the Method of Decision Table Reduction of rough set theory to carry out insulation tube arrester, to electrical network electricity Capacitive equipment 6 exports corresponding alarm control signal.
In the present invention, the pre-diagnostic alarms module 5 that insulate includes host computer and alarm relay, wherein host computer Receive the data of signal transmission module 4 input, run the pre-diagnostic software that insulate and be analyzed judging, according to judgement Output control alarm relay cut-offs, and exports corresponding alarm control signal to electrical network capacitance type equipment 6.
Below in conjunction with accompanying drawing 2, the present invention is further illustrated:
The rough set method flow process of electrical network capacitance type equipment insulation fault diagnosis is as follows: electrical network capacitance type equipment exhausted Edge fault diagnosis can be described as a pattern classification problem, is therefore well suited for by the decision table method of rough set theory Process, specifically exactly the failure symptom of the electrical network capacitance type equipment observed or measure is divided as to fault The conditional attribute of class, in esse fault sets up decision table as decision attribute, strong first with rough set theory Big yojan ability carries out abbreviation to raw information and obtains multiple yojan of equal value with raw information table, the most right The further abbreviation of yojan, finds least reduction, and extracts decision rules.For certain the electrical network electricity under practical situation The failure symptom of capacitive equipment, finds the rule of correspondence, diagnoses it.It practice, be to utilize fault to believe The redundancy of breath, processes incomplete fault message by avoiding that omit or mistake information.
Table 1 gives sign set C list, and table 2 gives fault type and corresponding sign thereof, according to Table 2 just can write out the decision table (see Table 3) of electrical network capacitance type equipment insulation fault diagnosis.Decision table passes through Delete unnecessary conditional attribute, it is thus achieved that 4 yojan: C2, C4, C6, C7}, C2, C3, C4, C5, C7}, { C1, C2, C4, C6}, { C1, C2, C3, C4, C5}.These 4 yojan maintain determines with former The identical classification capacity of plan table, but required conditional attribute greatly reduces, and clearly illustrates each event The key character of barrier, has the diagnosis capability identical with former decision table.
The Failure Diagnostic Code of simplification can be extracted, such as rule 1(Rule1 from 4 yojan): if (C2=1and C7=1) Then (D=D1) etc..Utilize these diagnostic rules simplified can be easily to electrical network capacitance type equipment Insulation fault diagnose.
In table 3, U represents sample number, Ci(i=1,2 ...) and D represent conditional attribute and certainly respectively Plan attribute, wherein, represents that when the value of conditional attribute Ci is 1 prognostic information occurs or abnormal, works as condition The value of attribute Ci is to represent when 0 that prognostic information occurs without or normally.
Table 1 sign set C list
Table 2 fault type and corresponding sign thereof
Table 3 is corresponding to the decision table of table 2

Claims (1)

1. electrical network capacitance type equipment insulation based on a rough set theory monitoring system, it is characterised in that: include signal transmitting module, signal processing module, data acquisition module, signal transmission module and insulation pre-diagnostic alarms module;Described signal transmitting module includes low current sensor and voltage transformer, low current sensor and voltage transformer detect the reflection three-phase voltage of this electrical network capacitance type equipment insulation state, leakage current and three kinds of physical quantitys of dielectric loss from electrical network capacitance type equipment, and are sent to described signal processing module after above-mentioned three kinds of physical quantitys are converted to the suitable signal of telecommunication;Described signal processing module is sent to described data acquisition module after the signal of telecommunication that described signal transmitting module inputs is carried out pretreatment, be filtered the signal of telecommunication of described signal transmitting module input and antisurge protection simultaneously;The signal of telecommunication through pretreatment that described signal processing module is inputted by described data acquisition module is acquired, A/D changes and is sent to described signal transmission module after record;Signal transmission module by described data collecting module collected to the signal of telecommunication be sent to described insulation pre-diagnostic alarms module;The data that described signal transmission module is inputted by the pre-diagnostic alarms module that insulate process, and utilize the Method of Decision Table Reduction of rough set theory to carry out insulation tube arrester, export corresponding alarm control signal to electrical network capacitance type equipment;Described insulation pre-diagnostic alarms module includes host computer and alarm relay, wherein host computer receives the data of described signal transmission module input, run the pre-diagnostic software that insulate to be analyzed judging, control alarm relay according to judged result to cut-off, export corresponding alarm control signal to electrical network capacitance type equipment.
CN201310752889.4A 2013-12-31 2013-12-31 Electrical network capacitance type equipment insulation based on rough set theory monitoring system CN103760456B (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101149416A (en) * 2007-11-15 2008-03-26 上海交通大学 Power cable insulation state monitoring and life span management system
CN101159376A (en) * 2007-09-26 2008-04-09 东北大学 Low current neutral grounding malfunction detection and positioning device and method
CN102368634A (en) * 2011-09-14 2012-03-07 文存润 Unified information platform system for state monitoring of intelligent transformer substation
CN103084708A (en) * 2013-02-04 2013-05-08 江苏科技大学 Method of identifying deviation of welding joint of rotating electric arc gas shielded welding based on rough set
CN103163389A (en) * 2011-12-08 2013-06-19 沈阳工业大学 Intelligent bus on-line monitoring and condition evaluation system
CN103293435A (en) * 2013-06-08 2013-09-11 国家电网公司 Capacitor monitoring and fault diagnosis system and method thereof
CN103412217A (en) * 2013-08-02 2013-11-27 中科天工电气控股有限公司 Box-type substation intelligent online failure diagnosis system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101159376A (en) * 2007-09-26 2008-04-09 东北大学 Low current neutral grounding malfunction detection and positioning device and method
CN101149416A (en) * 2007-11-15 2008-03-26 上海交通大学 Power cable insulation state monitoring and life span management system
CN102368634A (en) * 2011-09-14 2012-03-07 文存润 Unified information platform system for state monitoring of intelligent transformer substation
CN103163389A (en) * 2011-12-08 2013-06-19 沈阳工业大学 Intelligent bus on-line monitoring and condition evaluation system
CN103084708A (en) * 2013-02-04 2013-05-08 江苏科技大学 Method of identifying deviation of welding joint of rotating electric arc gas shielded welding based on rough set
CN103293435A (en) * 2013-06-08 2013-09-11 国家电网公司 Capacitor monitoring and fault diagnosis system and method thereof
CN103412217A (en) * 2013-08-02 2013-11-27 中科天工电气控股有限公司 Box-type substation intelligent online failure diagnosis system

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Address after: Ji Road in Shushan District of Hefei City, Anhui Province, No. 335 230031

Patentee after: Hefei Tianhai Electrical Technology Co., Ltd.

Address before: Ji Road Shushan Economic Development Zone of Hefei City, Anhui province 230031 No. 335

Patentee before: Hefei Tianhai Electrical Technology Co., Ltd.