CN110208688A - A kind of failure pre-judging method of breaker energy storage motor - Google Patents
A kind of failure pre-judging method of breaker energy storage motor Download PDFInfo
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- CN110208688A CN110208688A CN201910385604.5A CN201910385604A CN110208688A CN 110208688 A CN110208688 A CN 110208688A CN 201910385604 A CN201910385604 A CN 201910385604A CN 110208688 A CN110208688 A CN 110208688A
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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
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3275—Fault detection or status indication
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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
- G01R31/34—Testing dynamo-electric machines
- G01R31/343—Testing dynamo-electric machines in operation
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- General Physics & Mathematics (AREA)
- Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)
Abstract
A kind of failure pre-judging method of breaker energy storage motor, belong to HVAC vacuum circuit breaker energy storage motor current monitoring technique field, this method is realized based on tank circuit current monitoring device in energy storage motor, the tank circuit current monitoring device includes signal acquisition unit, signal processing unit, storage unit, by being converted into voltage signal to the current signal of acquisition, virtual value processing method in tenant activity collection period again, establish effective current waveform diagram, the working condition of decision circuit device, to improve the performance of breaker energy storage current of electric monitoring device on software view, and have versatile, the high feature of fault verification accuracy, have to maintenance and repair and its important meaning.
Description
Technical field
The invention belongs to HVAC vacuum circuit breaker energy storage motor current monitoring technique fields, and in particular to a kind of open circuit
The failure pre-judging method of device energy storage motor.
Technical background
With the high speed development of power grid, the importance of controller switching equipment own health level monitoring becomes increasingly conspicuous.High-voltage alternating
Breaker is the key equipment in electric system, and operating status has significant impact to the reliability of electric system.High pressure is handed over
The stored energy mechanism of stream circuit breaker internal is made of energy storage motor, energy-stored spring and transmission gear, and power supply mode can be according to user
Environment uses direct current supply or Alternating Current Power Supply.Important component of the energy storage motor as stored energy mechanism, operating current can
The directly executive condition of reaction energy storage movement.Currently, being had the following problems to the monitoring of breaker energy storage current of electric:
1) stored energy mechanism power supply mode difference causes to need different peripheral hardwares when energy storage motor current acquisition, can not unify energy storage electricity
Machine current monitoring equipment.
2) when stored energy mechanism uses Alternating Current Power Supply, power supply after the rectified bridge full-wave rectification of 220V electric main often by mentioning
For for energy storage motor end, obtained electric current contains apparent flutter component, current phase when leading to not ensure to sample
Consistency so that this analyzes and determines energy storage motor to accurate in the presence of adopting phenomenon inaccurate, that error is big when carrying out current acquisition
Working condition have serious influence, also increase repair and maintenance cost.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of failure pre-judging methods of breaker energy storage motor, by storage
The current acquisition method and fault verification principle of energy motor tank circuit improve, to improve breaker on software view
The performance of energy storage motor current monitoring device, and have the characteristics that versatile, fault verification accuracy is high, to maintenance and repair
Have and its important meaning.
The technical solution adopted by the present invention is that: a kind of failure pre-judging method of breaker energy storage motor, this method is to be based on
For tank circuit current monitoring device come what is realized, the tank circuit current monitoring device includes signal acquisition list in energy storage motor
Member, signal processing unit, storage unit, the failure pre-judging method the following steps are included:
1. after device powers on, signal acquisition unit is acquired the current signal in tank circuit, and current signal is converted
For voltage signal, signal processing unit is passed to after filtering again；The electricity that signal processing unit carrys out transmitting with the frequency of 10kHz
Pressure signal is handled, and records the voltage value U and corresponding moment T of each collection point；
2. determining whether energy storage motor starts to generate energy storage movement: if the voltage value U of continuous 20 collection points is both greater than 0, it is believed that
The energy storage movement of energy storage motor starts, and thens follow the steps 3.,
If the voltage value U of continuous 20 collection points is not both greater than 0, step is continued to execute 2.；
3. when energy storage movement occurs for energy storage motor: signal processing unit acquires week using time Q as unit collection period, in unit
The collection point of maximum voltage value is selected in phase as voltage effective value point U in this unit collection periodmax, its correspond to moment conduct
Moment virtual value Tmax, it is recorded as P=(Umax, Tmax),
Similarly, can establish energy storage motor occur energy storage action process in effective voltage value point set P=PN | N=1,2 ...,
N}；
4. synchronizing judgement to whether energy storage motor terminates energy storage movement: if continuous 20 are adopted while executing step 3.
The voltage value of collection point is all 0, it is believed that the energy storage movement of energy storage motor terminates, then terminates step 3.,
If the voltage value of continuous 20 collection points is not all 0, step is continued to execute 3.；
5., according to effective voltage value point set P={ PN | N=1,2 ..., N }, turning through A/D after the energy storage of energy storage motor movement
Tank circuit effective current waveform diagram in energy storage motor is established after change；
6. analytical procedure 5. in tank circuit effective current waveform diagram, calculate separately out energy storage motor idle period value, energy storage
Floor level of electric current after current upper limit value, load after motor idle electric current upper limit value, the full time value of energy-stored spring drawing, load；Divide again
It is not compared with corresponding setting threshold values, does not meet the deviation range of setting threshold values such as, then carry out fault warning.
Using the present invention generate the utility model has the advantages that being sentenced by current acquisition method to energy storage motor tank circuit and failure
Determine principle to improve, to improve the performance of breaker energy storage current of electric monitoring device on software view, and have
Feature versatile, fault verification accuracy is high, has maintenance and repair and its important meaning.
Detailed description of the invention
Fig. 1 is the structural block diagram of tank circuit current monitoring device of the invention；
Fig. 2 is the failure anticipation block diagram of tank circuit；
Fig. 3 is tank circuit effective current waveform diagram.
Specific embodiment
Referring to attached drawing 1-3, a kind of failure pre-judging method of breaker energy storage motor, this method is to be based on storing up in energy storage motor
For energy loop current monitoring device come what is realized, the tank circuit current monitoring device includes signal acquisition unit, signal processing
Unit, storage unit, the signal processing unit include signal processing circuit and MCU module, and the failure pre-judging method includes
Following steps:
1. after device powers on, signal acquisition unit is acquired the current signal in tank circuit, and current signal is converted
For voltage signal, signal processing unit is passed to after filtering again；The electricity that signal processing unit carrys out transmitting with the frequency of 10kHz
Pressure signal is handled, and records the voltage value U and corresponding moment T of each collection point；
2. determining whether energy storage motor starts to generate energy storage movement: if the voltage value U of continuous 20 collection points is both greater than 0, recognizing
Start for the energy storage movement of energy storage motor, then follow the steps 3.,
If the voltage value U of continuous 20 collection points is not both greater than 0, step is continued to execute 2.；
Step 2. in, occur the moment to avoid acting energy storage and generate erroneous judgement, choose first in continuous 20 collection points
It is acted at the time of collection point as energy storage and the moment occurs.
3. energy storage movement occurs for energy storage motor: signal processing unit is adopted using time Q as unit collection period and in unit
Voltage value point set U={ U is established point by point in the collection periodi| i=1 ... i } and corresponding moment value point set T=T={ Ti| i=1 ... i }, then
The value of each point in voltage value point set U is compared, selects the collection point of maximum voltage value as electric in this unit collection period
It is pressed with valid value point Umax, its correspond to moment as moment virtual value Tmax, it is recorded as P=(Umax, Tmax),
Similarly, it can establish and occur in energy storage action process in energy storage motor, effective voltage value point in energy storage motor tank circuit
Collection P=PN | N=1,2 ..., N }；
The detailed process of step 3. are as follows: signal acquisition unit quantity of collection point in unit collection period is set as 100, because
This, when with 10kHz frequency acquisition, when collection point of unit collection period a length of 10ms, energy storage motor Alternating Current Power Supply can be covered
When a primary ripple cycle；Energy storage motor starts after acting and undergoing the 1st 10ms, voltage value point set U and corresponding moment
Completion has been established in value point set T, concentrates the size of each point to be compared voltage value point at this time, show that the conduct of maximum voltage value point has
Voltage value is imitated, i.e. maximum value, its correspondence moment value in the dynamic cycle of a master pulse are as moment virtual value.Thus it obtains needing to deposit
1st virtual value point P1=(U of storagemax, Tmax), and save.
After the virtual value P1 for calculating the dynamic cycle of the 1st master pulse, over time, repeat to update voltage value point set
U and time value point set T.In the 2nd 10ms, from obtain needing to store in energy storage motor current waveform in updated U and T
2nd virtual value point P2；In the 3rd 10ms, from obtaining needing to store in energy storage motor current waveform in updated U and T
The 3rd virtual value point P3；……；Until energy storage movement terminates, effective voltage value point during rising occurs for completion energy storage movement
Collect P=PN | N=1,2 ..., N } foundation.
4. synchronizing judgement to whether energy storage motor terminates energy storage movement while executing step 3.: if continuous 20
The voltage value of a collection point is all 0, it is believed that the energy storage movement of energy storage motor terminates, then terminates step 3.,
If the voltage value of continuous 20 collection points is not all 0, step is continued to execute 3.；
Step 4. in, generate erroneous judgement to avoid acting end time point to energy storage, choose last in continuous 20 collection points
Finish time is acted as energy storage at the time of one collection point.In collection process, to avoid acting energy storage the production of end time point
Raw erroneous judgement, signal processing unit continuous acquisition are 0 available point P to 20 voltage effective valuesend={Pendi| i=1 ..., 20 },
Determine that energy storage movement is over, and energy storage movement finish time occurs in Pend1At corresponding time point.
5. after the energy storage of energy storage motor movement, according to effective voltage value point set P={ PN | N=1,2 ..., N }, through A/
Tank circuit effective current waveform diagram in energy storage motor is established after D conversion；
6. analytical procedure 5. in tank circuit effective current waveform diagram, it is empty to calculate energy storage motor idle period value, energy storage motor
Turn current upper limit value, energy-stored spring draws after full time value, load floor level of electric current after current upper limit value, load；
Step 6. in energy storage motor idle period value calculating method:
Energy storage motor idle period value=energy storage movement occurs moment-device and powers on the moment；T1-T0=energy storage electricity i.e. in attached drawing 3
Machine idle period value.
Step 6. in energy storage motor idle electric current upper limit value choosing method: after energy storage motor idle electric current stablize after electricity
Levelling mean value；I1 i.e. in attached drawing 3 represents energy storage motor idle electric current upper limit value.
Step 6. in energy-stored spring draw full time value calculating method:
Energy-stored spring draws full time value=energy storage movement finish time-energy storage movement that the moment occurs；T2-T1=storage i.e. in attached drawing 3
It can the full time value of spring drawing
Step 6. in load after current upper limit value choosing method: current upper limit value=selection thermal energy storage process maximum current after load
Value；Step 6. in load after floor level of electric current choosing method: floor level of electric current=selection thermal energy storage process maximum current after load
Value；I2 i.e. in attached drawing 3 represents current upper limit value after load, also represents floor level of electric current after load.
7. by step 6. in calculate energy storage motor idle period value, with setting idle period upper limit threshold comparison:
If more than setting idle period upper limit threshold, then determines " energy-stored spring fatigue or fracture " or " transmission mechanism is asked
Topic, motor idle running；
By step 6. in calculate energy motor idle electric current upper limit value, with setting energy storage motor idle electric current upper limit threshold comparison:
If more than setting energy storage motor idle electric current upper limit threshold, then decision mechanism's lack of lubrication or gear clamping stagnation；
By step 6. in the energy-stored spring that calculates draw full time value, draw full time upper limit threshold comparison with setting energy-stored spring:
Full time upper limit is drawn if more than setting energy-stored spring, then determines change-over switch not in place, motor circuit can not be cut off；
By current upper limit value after the step 6. middle load calculated, upper current limit threshold comparison after being loaded with setting:
If more than upper current limit threshold value after setting load, then decision mechanism's lack of lubrication or gear clamping stagnation；
By floor level of electric current after the step 6. middle load calculated, lower current limit threshold comparison after being loaded with setting:
If being less than lower current limit threshold value after setting load, energy-stored spring fatigue is determined, pulling force is too small.
After the energy storage movement of energy storage motor, energy storage motor current waveform is established, can be used for standard energy storage motor electric current
The foundation of waveform, it is also possible to the real-time monitoring of energy storage motor working condition, have to maintenance and repair and its important meaning.
Claims (9)
1. a kind of failure pre-judging method of breaker energy storage motor, this method is based on tank circuit current monitoring in energy storage motor
Device realizes, the tank circuit current monitoring device includes signal acquisition unit, signal processing unit, storage unit,
It is characterized in that the failure pre-judging method the following steps are included:
1. after device powers on, signal acquisition unit is acquired the current signal in tank circuit, and current signal is converted
For voltage signal, signal processing unit is passed to after filtering again；The electricity that signal processing unit carrys out transmitting with the frequency of 10kHz
Pressure signal is handled, and records the voltage value U and corresponding moment T of each collection point；
2. determining whether energy storage motor starts to generate energy storage movement: if the voltage value U of continuous 20 collection points is both greater than 0, it is believed that
The energy storage movement of energy storage motor starts, and thens follow the steps 3.,
If the voltage value U of continuous 20 collection points is not both greater than 0, step is continued to execute 2.；
3. when energy storage movement occurs for energy storage motor: signal processing unit acquires week using time Q as unit collection period, in unit
The collection point of maximum voltage value is selected in phase as voltage effective value point Umax, its correspond to moment as moment virtual value Tmax, note
Record is P=(Umax, Tmax),
Similarly, it can establish and effective voltage value point set P={ PN | N=1,2 ..., N } in energy storage action process occurs in energy storage motor；
4. synchronizing judgement to whether energy storage motor terminates energy storage movement: if continuous 20 are adopted while executing step 3.
The voltage value of collection point is all 0, determines that the energy storage movement of energy storage motor terminates, then terminates step 3.,
If the voltage value of continuous 20 collection points is not all 0, step is continued to execute 3.；
5., according to effective voltage value point set P={ PN | N=1,2 ..., N }, turning through A/D after the energy storage of energy storage motor movement
Tank circuit effective current waveform diagram in energy storage motor is established after change；
6. analytical procedure 5. in tank circuit effective current waveform diagram, calculate separately out energy storage motor idle period value, energy storage
Floor level of electric current after current upper limit value, load after motor idle electric current upper limit value, the full time value of energy-stored spring drawing, load；Divide again
It is not compared with corresponding setting threshold values, does not meet the deviation range of setting threshold values such as, then carry out fault warning.
2. the failure pre-judging method of breaker energy storage motor according to claim 1, it is characterised in that: step 2. in,
Moment generation erroneous judgement, conduct at the time of choosing first collection point in continuous 20 collection points occurs to avoid acting energy storage
Moment occurs for energy storage movement.
3. the failure pre-judging method of breaker energy storage motor according to claim 1, it is characterised in that: step 4. in,
Erroneous judgement is generated to avoid acting energy storage finish time, conduct at the time of choosing first collection point in continuous 20 collection points
Energy storage acts finish time.
4. the failure pre-judging method of breaker energy storage motor according to claim 1, it is characterised in that: step 6. in storage
The calculation method and decision principle of energy motor idle period value:
Energy storage motor idle period value=energy storage movement occurs moment-device and powers on the moment；
If calculate energy storage motor idle period value be greater than setting idle period upper limit threshold, determine " energy-stored spring fatigue or
It is broken " or " transmission mechanism goes wrong, motor idle running.
5. the failure pre-judging method of breaker energy storage motor according to claim 1, it is characterised in that: step 6. in storage
The calculation method and decision principle of energy motor idle electric current upper limit value: energy storage motor idle electric current upper limit value=energy storage motor idle running
Current average after electric current is stable；
If the energy storage motor idle electric current upper limit value calculated is greater than setting energy storage motor idle electric current upper limit threshold, decision mechanism
Lack of lubrication or gear clamping stagnation.
6. the failure pre-judging method of breaker energy storage motor according to claim 1, it is characterised in that: step 6. in storage
Energy spring draws the calculation method and decision principle of full time value:
Energy-stored spring draws full time value=energy storage movement finish time-energy storage movement that the moment occurs；
If the energy-stored spring calculated draws full time value to be greater than setting energy-stored spring and draws full time upper limit, determine that change-over switch does not arrive
Position, motor circuit can not be cut off.
7. the failure pre-judging method of breaker energy storage motor according to claim 1, it is characterised in that: step 6. in it is negative
The choosing method and decision principle of current upper limit value after load: current upper limit value=thermal energy storage process maximum current value after load；
If current upper limit value is greater than upper current limit threshold value, decision mechanism's lack of lubrication or tooth after setting load after the load chosen
Take turns clamping stagnation.
8. the failure pre-judging method of breaker energy storage motor according to claim 1, it is characterised in that: step 6. in it is negative
The choosing method and decision principle of floor level of electric current after load: floor level of electric current=thermal energy storage process maximum current value after load；
If floor level of electric current is less than lower current limit threshold value after setting load after the load chosen, determines energy-stored spring fatigue, draw
Power is too small.
9. the failure pre-judging method of breaker energy storage motor according to claim 1, it is characterised in that: the signal processing
Unit includes signal processing circuit and MCU module.
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| CN113114082A (en) * | 2021-03-05 | 2021-07-13 | 深圳供电局有限公司 | Control device of energy storage motor and method and system thereof |
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| CN113114082A (en) * | 2021-03-05 | 2021-07-13 | 深圳供电局有限公司 | Control device of energy storage motor and method and system thereof |
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Application publication date: 20190906 |