Distributor breaker mechanical property monitors appraisal procedure and system on-lineTechnical field
The invention belongs to power distribution automation and distributor breaker status monitoring field, specifically a kind of distributor breaker machinesTool characteristic monitors appraisal procedure and system on-line.
Background technique
Distribution breaker is a kind of electrical equipment the most key in device for switching as insulation and arc-control device.Normal fortuneWhen row, for carrying out switching the method for operation, circuit or keep its out of service equipment or route access as needed, when equipment orIt can quickly be cut off again when line failure, guarantee that other parts operate normally safely.It plays control and protection in distributionDouble action, working condition directly affects the security and reliability of electric system.
The reliability of breaker depends greatly on the reliability of its mechanical actuating system.China is to high-voltage switch gearAccident statistical analysis shows in the failure of breaker that mechanical breakdown (including operating mechanism and control loop) accounts for all failures80% or more, other arc extinguishings, insulation fault occupy lesser ratio, and heating accident ratio is lower.Breaker is due to mechanical reasonCaused accident all occupies 60% or more total amount either in number, or on power off time caused by accident.ThereforeThe mechanical property of breaker is monitored and is diagnosed is particularly significant.
Current distribution enters automation, intelligent development new era.The fast development of power distribution automation is the inspection of distribution O&MIt repairs and provides new approach with equipment state control." remote signalling ", " telemetering " function in distribution power automation terminal is to a certain degreeOn realize the distributed monitoring of distribution and therefore expanded in the basic function of distribution power automation terminal, realize that distribution is disconnectedThe distributed on line monitoring of road device is a kind of new thinking of development.
Summary of the invention
The distributor breaker mechanical property on-line monitoring appraisal procedure that the invention discloses a kind of based on power distribution automation andSystem makes full use of the basic function of distribution power automation terminal, realizes the performance monitoring of distribution breaker mechanical, can effectively expandApplication of the power distribution automation in terms of distribution O&M.
Technical solution of the present invention:
A kind of distributor breaker mechanical property on-line monitoring appraisal procedure, comprising the following steps:
Hall current sensor, monitoring breaker divide-shut brake coil current letter are accessed in circuit-breaker switching on-off wire loopBreath, and distribution power automation terminal is accessed by serial ports；
Distribution power automation terminal acquires fundamental surveillance amount: the terminal telemetering magnitude of current and remote signalling amount；
The communication module of distribution power automation terminal is using distribution power automation terminal communication channel by the terminal telemetering magnitude of current, distantIt is uploaded after traffic and divide-shut brake coil current information taken by Unified Communication agreement；
The terminal telemetering magnitude of current, remote signalling amount and the divide-shut brake coil current information of upload summarize to power distribution automation main stationIt is monitored information evaluation；
It includes the assessment of distributor breaker mechanical Characteristic, distribution open circuit that power distribution automation main station, which is monitored information evaluation,Device electrical contact endurance is assessed and provides Strategies of Maintenance to circuit-breaker status classification assessment.
The power distribution automation main station be monitored information evaluation the following steps are included:
When remote signalling amount changes, breaker mechanic property analysis appraisal procedure starts to start；
Using intelligent mode matching algorithm, the divide-shut brake coil current information of acquisition is analyzed, assesses electromagnet ironWhether there is or not bite, deformation, tripping failures for core mechanism；Assess the motion conditions of the running part of distributor breaker operating mechanism；Assess some mechanical defect type and development trend of breaker；
When using divide-shut brake coil current, telemetering curent change situation and remote signalling amount COMPREHENSIVE CALCULATING circuit-breaker switching on-offBetween, it is based on branch wire time, drop-out current is extracted in analysis from telemetering electric current, using weighting assessment algorithm, calculates breaker touchingHead electrical wear amount situation, assesses contact of breaker electric life；
According to above-mentioned assessment result, classification assessment is carried out to circuit-breaker status, and provide Strategies of Maintenance.
Specific step is as follows for the intelligent mode matching algorithm:
Divide-shut brake winding waveform library, including each model breaker normal condition waveform library are established, breaker history is testedWaveform library and various defective waveform libraries；
The circuit-breaker switching on-off coil current waveform information of acquisition is pre-processed；
Feature extraction and selection is carried out to the circuit-breaker switching on-off coil current waveform information of acquisition；
Indicatrix generates and characteristic matching and comparative analysis, by by tested waveform and normal waveform, history waveformDiversity factor quantified, assess breaker mechanical state, by match with defective waveform feature assess mechanical defect andReason.
It is described to calculate contact of breaker electrical wear situation using weighting assessment algorithm, assessment contact of breaker electric lifeSpecific step is as follows:
Monitor distributor breaker divide-shut brake coil drop-out current, open and close times, arcing time parameter；
Utilize divide-shut brake coil current information, telemetering curent change situation and remote signalling amount COMPREHENSIVE CALCULATING breaker divisionThe lock time；
Based on branch wire time, drop-out current is extracted in analysis from telemetering electric current, using weighting assessment algorithm, calculates open circuitDevice contact electrical wear amount situation；
Electrical contact endurance is assessed by contact of breaker electrical wear amount situation, predicts the remaining life of contact.
The formula for calculating contact of breaker electrical wear amount situation is as follows:
Wherein Q is the electrical wear amount of contact, IiFor i-th drop-out current, tiFor i-th opening-closing arcing time；tiBy dividingClosing coil electric current, telemetering curent change situation and remote signalling amount COMPREHENSIVE CALCULATING obtain.
The circuit-breaker switching on-off coil current information of the Hall current sensor monitoring passes through A/D converter for analog quantityIt is converted into accessing distribution power automation terminal by serial ports after digital quantity.
A kind of distributor breaker mechanical property on-line monitoring assessment system, the monitoring including distribution power automation terminal is arranged inDevice, distribution power automation terminal communication channel and power distribution automation main station,
The monitoring device includes the Hall current sensor accessed in circuit-breaker switching on-off wire loop, power distribution automationTerminal telemetry module and remote signal module, Hall current sensor is for monitoring breaker divide-shut brake coil current information and is led toIt crosses serial ports and is transferred to distribution power automation terminal, distribution power automation terminal telemetry module is used for the acquisition terminal telemetering magnitude of current, remote signallingModule is used to acquire the remote signalling amount of distribution power automation terminal；
The distribution power automation terminal communication channel includes information taken module and optical fiber or wireless communication module, informationCollection module is for summarizing circuit-breaker switching on-off coil current information, the telemetering magnitude of current and remote signalling amount, optical fiber or wirelessMonitoring information after communication module is used to summarize information taken module is uploaded to power distribution automation master using Unified Communication agreementIt stands；
The power distribution automation main station provides distributor breaker machine for being analyzed and processed to the monitoring information after summarizingTool characteristic evaluation and Strategies of Maintenance.
A/D converter is connected on the Hall current sensor, the circuit-breaker switching on-off coil current letter for that will acquireBreath analog signal is converted into digital signal and is convenient for transmitting by serial ports.
Technical effect of the invention: the present invention makes full use of the basic function of distribution power automation terminal, by disconnected in distributionSimple Hall current sensor is installed in the device of road, and combines automatization terminal communication channel, telemetering, remote signalling amount, realizes distributionThe remote online monitoring of breaker mechanical performance is assessed, and the specific aim of overhaul of the equipments is improved, and is effectively expanded power distribution automation and is being matchedApplication in terms of net O&M.
Detailed description of the invention
Fig. 1 is distributor breaker mechanical property on-line monitoring appraisal procedure flow diagram of the present invention；
Fig. 2 is that power distribution automation main station of the present invention is monitored information evaluation flow diagram；
Fig. 3 is intelligent mode matching algorithm flow diagram of the present invention；
Fig. 4 is present invention assessment contact of breaker electric life flow diagram；
Fig. 5 is monitoring and evaluating system structural schematic diagram of the present invention.
Figure label respectively indicates: 1- distribution power automation terminal, 2- circuit-breaker switching on-off wire loop, and 3- Hall current passesSensor, 4- serial ports, 5- information taken module, 6- optical fiber or wireless communication module, 7- power distribution automation main station.
Specific embodiment
The following further describes the present invention with reference to the drawings:
As shown in Figure 1, a kind of distributor breaker mechanical property monitors appraisal procedure on-line, comprising the following steps:
S1. Hall current sensor, monitoring breaker divide-shut brake coil electricity are accessed in circuit-breaker switching on-off wire loopStream information, and distribution power automation terminal is accessed by serial ports；
S2. distribution power automation terminal acquires fundamental surveillance amount: the terminal telemetering magnitude of current and remote signalling amount；
S3. the communication module of distribution power automation terminal uses distribution power automation terminal communication channel by terminal telemetering electric currentIt is uploaded after amount, remote signalling amount and divide-shut brake coil current information taken by Unified Communication agreement；
S4. the terminal telemetering magnitude of current, remote signalling amount and the divide-shut brake coil current information uploaded summarizes to power distribution automationMain website is monitored information evaluation；
S5. it includes the assessment of distributor breaker mechanical Characteristic, distribution that power distribution automation main station, which is monitored information evaluation,Contact of breaker electric life is assessed and provides Strategies of Maintenance to circuit-breaker status classification assessment.
As shown in Fig. 2, the power distribution automation main station be monitored information evaluation the following steps are included:
S10. when remote signalling amount changes, breaker mechanic property analysis appraisal procedure starts to start；
S20. intelligent mode matching algorithm is used, the divide-shut brake coil current information of acquisition is analyzed, assesses electromagnetismWhether there is or not bite, deformation, tripping failures for iron iron core mechanism；Assess the movement feelings of the running part of distributor breaker operating mechanismCondition；Assess some mechanical defect type and development trend of breaker；
S30. divide-shut brake coil current, telemetering curent change situation and remote signalling amount COMPREHENSIVE CALCULATING breaker division are utilizedThe lock time is based on branch wire time, and drop-out current is extracted in analysis from telemetering electric current, using weighting assessment algorithm, calculates open circuitDevice contact electrical wear amount situation assesses contact of breaker electric life；
S40. according to above-mentioned assessment result, classification assessment is carried out to circuit-breaker status, and provide Strategies of Maintenance.
As shown in figure 3, specific step is as follows for the intelligent mode matching algorithm:
S100. divide-shut brake winding waveform library, including each model breaker normal condition waveform library are established, breaker is testedHistory waveform library and various defective waveform libraries；
S200. the circuit-breaker switching on-off coil current waveform information of acquisition is pre-processed；
S300. feature extraction and selection is carried out to the circuit-breaker switching on-off coil current waveform information of acquisition；
S400. indicatrix generates and characteristic matching and comparative analysis, by by tested waveform and normal waveform, historyThe diversity factor of waveform is quantified, and breaker mechanical state is assessed, and assesses mechanical lack by match with defective waveform featureSunken and reason.
As shown in figure 4, it is described using weighting assessment algorithm, calculate contact of breaker electrical wear situation, assessment breaker touchingSpecific step is as follows for head electric life:
S01. distributor breaker divide-shut brake coil drop-out current, open and close times, arcing time parameter are monitored；
S02. divide-shut brake coil current information, telemetering curent change situation and remote signalling amount COMPREHENSIVE CALCULATING breaker are utilizedBranch wire time；
S03. it is based on branch wire time, drop-out current is extracted in analysis from telemetering electric current, using weighting assessment algorithm, calculatesContact of breaker electrical wear amount situation；
S04. electrical contact endurance is assessed by contact of breaker electrical wear amount situation, predicts the remaining life of contact.
The formula for calculating contact of breaker electrical wear amount situation is as follows:
Wherein Q is the electrical wear amount of contact, IiFor i-th drop-out current, tiFor i-th opening-closing arcing time；tiBy dividingClosing coil electric current, telemetering curent change situation and remote signalling amount COMPREHENSIVE CALCULATING obtain.
The circuit-breaker switching on-off coil current information of the Hall current sensor monitoring passes through A/D converter for analog quantityIt is converted into accessing distribution power automation terminal by serial ports after digital quantity.
As shown in figure 5, a kind of distributor breaker mechanical property monitors assessment system on-line, including it is arranged in power distribution automationMonitoring device, distribution power automation terminal communication channel and the power distribution automation main station 7 of terminal 1,
The monitoring device includes that Hall current sensor 3, the distribution in access circuit-breaker switching on-off wire loop 2 are automaticChange terminal telemetry module and remote signal module, Hall current sensor 2 is used for monitoring breaker divide-shut brake coil current information and willIts information taken module 5 that distribution power automation terminal is transferred to by serial ports 4, distribution power automation terminal telemetry module is for acquiringThe terminal telemetering magnitude of current, remote signal module are used to acquire the remote signalling amount of distribution power automation terminal；
The distribution power automation terminal communication channel includes information taken module 5 and optical fiber or wireless communication module 6, letterBreath collection module 5 is for summarizing circuit-breaker switching on-off coil current information, the telemetering magnitude of current and remote signalling amount, optical fiber or nothingMonitoring information after line communication module 6 is used to summarize information taken module is uploaded to power distribution automation using Unified Communication agreementMain website 7；
The power distribution automation main station 7 provides distributor breaker for being analyzed and processed to the monitoring information after summarizingMechanical property assessment result and fortune inspection strategy.
A/D converter is connected on the Hall current sensor 3, the circuit-breaker switching on-off coil current letter for that will acquireBreath analog signal is converted into digital signal and is convenient for transmitting by serial ports.
The present invention makes full use of the basic function of distribution power automation terminal, by installing in distributor breaker simply suddenlyThat current sensor, and automatization terminal communication channel, telemetering, remote signalling amount are combined, realize the remote of distributor breaker mechanical performanceJourney on-line monitoring, improves the specific aim of overhaul of the equipments, effectively expands application of the power distribution automation in terms of distribution O&M.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not toThe limitation present invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should all includeWithin protection scope of the present invention.