CN207965076U - A kind of power supply system AC circuit breaker acting characteristic on-line monitoring analytical equipment - Google Patents
A kind of power supply system AC circuit breaker acting characteristic on-line monitoring analytical equipment Download PDFInfo
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- CN207965076U CN207965076U CN201820315943.7U CN201820315943U CN207965076U CN 207965076 U CN207965076 U CN 207965076U CN 201820315943 U CN201820315943 U CN 201820315943U CN 207965076 U CN207965076 U CN 207965076U
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- circuit breaker
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Abstract
The utility model discloses a kind of power supply system AC circuit breaker acting characteristics to monitor analytical equipment on-line, it includes transformer measurement unit, data acquisition unit and computer, and Verification of Measuring Current Transformer and measurement that transformer measurement unit is included by it measure the voltage of the zero-sequence current of the AC circuit breaker, the electric current of three-phase circuit and three-phase circuit with voltage transformer respectively；On data acquisition unit in addition to being connect respectively with the output end of the Verification of Measuring Current Transformer of the transformer measurement unit and measurement voltage transformer, it is additionally provided with four On-off signal channels and is respectively used to input separating brake instruction, AC circuit breaker reclosing command, AC circuit breaker open position feedback signal and the AC circuit breaker closing position feedback signal of the AC circuit breaker；Computer is connect by Ethernet with data acquisition unit.The utility model can in real time be monitored AC circuit breaker, and can realize the judgement to failure by the data of its acquisition.
Description
Technical field
The utility model is related to a kind of power supply system AC circuit breaker acting characteristics to monitor analytical equipment on-line.
Background technology
Power supply system is particularly important in every profession and trade field, and AC circuit breaker is the pass of power grid, power transformation station power supply and distribution in one's power
Key member plays the part of the effect of divide-shut brake and protection in power supply system, is the object that power supply and distribution maintenance department pays close attention to, once
It breaks down, it will cause serious consequence, therefore, device need to be designed, AC circuit breaker is monitored in real time, and it is carried out
Fault pre-alarming.
Utility model content
Technical problem to be solved in the utility model is just to provide a kind of power supply system AC circuit breaker acting characteristic and exists
Line device for monitoring and analyzing can in real time be monitored AC circuit breaker by the device, and can be realized by the data of its acquisition
Judgement to failure.
Above-mentioned technical problem is solved, the technical solution adopted in the utility model is as follows：
A kind of power supply system AC circuit breaker acting characteristic on-line monitoring analytical equipment, it is characterized in that including：
Transformer measurement unit, the Verification of Measuring Current Transformer included by it and measurement are measured respectively with voltage transformer
The voltage of the zero-sequence current of the AC circuit breaker, the electric current of three-phase circuit and three-phase circuit；
Data acquisition unit, except respectively with the Verification of Measuring Current Transformer and measurement voltage of the transformer measurement unit
The output end connection of mutual inductor is outer, is additionally provided with four On-off signal channels and is respectively used to input the separating brake of the AC circuit breaker
Instruction, AC circuit breaker reclosing command, AC circuit breaker open position feedback signal and AC circuit breaker closing position feedback letter
Number；
Computer is connect by Ethernet with data acquisition unit.
The data acquisition unit includes CPU and data storage, and data acquisition unit corresponds to Verification of Measuring Current Transformer
The conversion for current signal and voltage signal to be converted into analog signals is also respectively provided with voltage transformer with measurement
The output end of Current Transformer and conversion voltage transformer, Verification of Measuring Current Transformer and measurement voltage transformer is distinguished
The corresponding input terminal with conversion Current Transformer and conversion voltage transformer is connect, and conversion Current Transformer and conversion are used
The output end of voltage transformer is connect with CPU respectively, and four On-off signal channels are connect with CPU respectively, and data storage is used
In the data of storage CPU acquisitions.
Collected all signal datas by CPU be converted to when target Wave data be stored in data storage
In, Wave data carries out communications with the Modbus Transmission Control Protocol of standard.
When feed motion occurs for the AC circuit breaker or separating brake acts, after CPU interceptions act preceding 200ms and action
The data acquired between 1800ms are used to form Wave data file.
The on-line monitoring analytical equipment further includes interchanger, and ethernet communication mouth and the interchanger of data acquisition unit connect
It connects, interchanger is connect with computer.
The CPU uses STM32F4 chips, clock cycle 15ns.
The collection period of the data acquisition unit is 0.5ms.
The Verification of Measuring Current Transformer and measurement export 5A electric currents and 57.74V voltages with voltage transformer respectively, described
Current signal and voltage signal are converted to the analog quantity of 0~5V with voltage transformer by conversion Current Transformer and conversion respectively
Signal.
Compared with prior art, the utility model has the advantages that：
The utility model can be monitored the acting characteristic of the AC circuit breaker of the AC switch cubicle of power supply system, data
It is uploaded in computer by data acquisition unit, thus by real-time monitoring of computer AC circuit breaker and number can be acquired
According to providing foundation for the investigation and positioning of failure., it can be achieved that calculating exchange on the basis of the utility model collected data
Actuation time of breaker, response time, arc time, quenching time and not key parameters such as time same period, can also be by history
Data are for statistical analysis, form report and curve, and whether the action to judge AC circuit breaker is abnormal, provides fault pre-alarming.
Description of the drawings
Fig. 1 is the principles of the present invention schematic diagram；
Fig. 2 is the composition schematic diagram of the data acquisition unit of the utility model.
Specific implementation mode
The utility model is further described with reference to embodiment.
A kind of power supply system AC circuit breaker acting characteristic as shown in Figure 1 monitors analytical equipment, the power supply system on-line
In include alternating current room, AC switch cubicle is equipped in alternating current room, AC circuit breaker is arranged in AC switch cubicle.This action
It includes transformer measurement unit, data acquisition unit, computer PC1 and interchanger SC1 that characteristic, which monitors analytical equipment on-line,.It calculates
Machine PC1 and interchanger SC1 are located in monitoring room.
Transformer measurement unit by its Verification of Measuring Current Transformer measure respectively AC circuit breaker zero-sequence current In and
The electric current (Ia, Ib, Ic) of three-phase circuit (A, B, C) measures AC circuit breaker respectively with measurement by it with voltage transformer
The voltage (Ua, Ub, Uc) of three-phase circuit (A, B, C).The electric current of measurement object is converted 5A electricity by Verification of Measuring Current Transformer respectively
The voltage of measurement object is converted 57.74V voltage outputs by stream output, measurement respectively with voltage transformer.
Data acquisition unit includes CPU and data storage, and CPU uses STM32F4 chips, clock cycle 15ns.
Data acquisition unit also corresponds to Verification of Measuring Current Transformer and measurement and is provided with for by current signal with voltage transformer respectively
The conversion Current Transformer and conversion voltage transformer of analog signals, measurement Current Mutual Inductance are converted into voltage signal
The output end of device and measurement voltage transformer respectively it is corresponding with convert the defeated of Current Transformer and conversion voltage transformer
Enter end connection, the output end for converting Current Transformer and conversion voltage transformer is connect with the ADC of CPU mouths respectively again.Turn
It is 5A electric currents miniature, that they carry out transformer measurement unit transportation that current transformer and conversion are used instead with voltage transformer
Signal and 57.74V voltage signals are converted to the analog signals of 0~5V, and CPU is believed by the analog quantity of its ADC mouthfuls of 0~5V of receiving
Number, the data that above-mentioned acquisition comes also are calculated as actual measured value by CPU, i.e., the data to become smaller in proportion are calculated also in proportion again
Original is at actual size.To collect the zero-sequence current In of AC circuit breaker, the electric current (Ia, Ib, Ic) of three-phase circuit and three-phase
The voltage (Ua, Ub, Uc) of circuit.
Data acquisition unit is set there are four On-off signal channel DI1, DI2, DI3, DI4, four On-off signal channels
DI1, DI2, DI3, DI4 are connect with the corresponding site of AC circuit breaker respectively, for acquiring the instruction of AC circuit breaker separating brake, exchange
Breaker closing instruction, AC circuit breaker open position feedback signal and AC circuit breaker closing position feedback signal.Above-mentioned
Corresponding site with four On-off signal channels DI1, DI2, DI3, DI4 AC circuit breaker connecting is：AC circuit breaker point
Lock instructs transmission port, AC circuit breaker reclosing command transmission port, AC circuit breaker open position sensor signal output end
Mouth and AC circuit breaker closing position sensor signal output port.Four On-off signal channels are also connect with CPU respectively, from
And collect the data in four On-off signal channels.
The collection period to data of data acquisition unit is 0.5ms, and collected all signal datas are converted by CPU
At with when target Wave data be stored in data storage.Data acquisition unit is additionally provided with ethernet communication mouth, passes through net
Line is connect with interchanger SC1, and interchanger SC1 is connect by cable with computer again.Wave data is with the Modbus TCP of standard
Agreement carries out communications.When AC circuit breaker generation feed motion or separating brake act, CPU interceptions act preceding 200ms and move
The data acquired between 1800ms after work are used to form Wave data file.
The utility model when AC circuit breaker acts, disturb by the Current Voltage that breaker is measured by transformer measurement unit
Dynamic value forms Wave data file and is stored in data acquisition unit, can show and analyze breaker actuation hair by computer
Current-voltage waveform after before death calculates every waveform characteristic parameter, reflects the acting characteristic of AC circuit breaker, finally obtain
As a result it is presented to the user.
The utility model is monitoring breaker acting characteristic data dedicated unit, using breaker waveform monitoring technology, is led to
The data for crossing analysis acquisition, can fast and accurately judge and analyze failure, foundation is provided for the investigation and positioning of failure.Also can
In system normal operation, real-time record current voltage can form Wave data by the data of acquisition, fall into a trap from Wave data
Calculation show that multinomial waveform characteristic parameter, the power supply performance of analysis system provide fault pre-alarming by analysis of history Wave data.
The composition schematic diagram of data acquisition unit as shown in Figure 2, switching value I/O interfaces shown in figure refer to four and open
Pass measure input channel DI1, DI2, DI3, DI4,4 tunnel current measurement channels refer to zero-sequence current In and three-phase circuit electric current Ia,
The interface channel of Ib, Ic, 3 tunnel voltage measurement channels refer to the interface channel of voltage Ua, Ub, Uc of three-phase circuit, data acquisition
Key indicator lamp, liquid crystal display, power circuit, RS485 interfaces and USB interface are additionally provided on unit.
Claims (8)
1. a kind of power supply system AC circuit breaker acting characteristic monitors analytical equipment on-line, which is characterized in that including：
Described in transformer measurement unit, the Verification of Measuring Current Transformer included by it and measurement voltage transformer measure respectively
The voltage of the zero-sequence current of AC circuit breaker, the electric current of three-phase circuit and three-phase circuit；
Data acquisition unit, except respectively with the Verification of Measuring Current Transformer and measurement mutual induction of voltage of the transformer measurement unit
The output end connection of device is outer, is additionally provided with four On-off signal channels and is respectively used to input the separating brake of the AC circuit breaker and refers to
It enables, AC circuit breaker reclosing command, AC circuit breaker open position feedback signal and AC circuit breaker closing position feedback signal；
Computer is connect by Ethernet with the data acquisition unit.
2. power supply system AC circuit breaker acting characteristic according to claim 1 monitors analytical equipment on-line, feature exists
In：The data acquisition unit includes CPU and data storage, and the data acquisition unit corresponds to the measurement Current Mutual Inductance
Device and measurement are also respectively provided with voltage transformer for current signal and voltage signal to be converted into turning for analog signals
Use current transformer and conversion voltage transformer, the output of the Verification of Measuring Current Transformer and measurement voltage transformer instead
End corresponds to respectively to be connect with the input terminal of the conversion Current Transformer and conversion voltage transformer, the conversion electric current
The output end of mutual inductor and conversion voltage transformer is connect with the CPU respectively, four On-off signal channels difference
It is connect with the CPU, the data storage is used to store the data of the CPU acquisitions.
3. power supply system AC circuit breaker acting characteristic according to claim 2 monitors analytical equipment on-line, feature exists
In：Collected all signal datas by the CPU be converted to when target Wave data be stored in the data and store
In device, the Wave data carries out communications with the Modbus Transmission Control Protocol of standard.
4. power supply system AC circuit breaker acting characteristic according to claim 3 monitors analytical equipment on-line, feature exists
In：When feed motion occurs for the AC circuit breaker or separating brake acts, after the CPU interceptions act preceding 200ms and action
The data acquired between 1800ms are used to form Wave data file.
5. power supply system AC circuit breaker acting characteristic according to claim 1 monitors analytical equipment on-line, feature exists
In：The on-line monitoring analytical equipment further includes interchanger, and the ethernet communication mouth of data acquisition unit is connect with interchanger, institute
Interchanger is stated to connect with computer.
6. power supply system AC circuit breaker acting characteristic according to claim 2 monitors analytical equipment on-line, feature exists
In：The CPU uses STM32F4 chips, clock cycle 15ns.
7. power supply system AC circuit breaker acting characteristic according to claim 1 monitors analytical equipment on-line, feature exists
In：The collection period of the data acquisition unit is 0.5ms.
8. power supply system AC circuit breaker acting characteristic according to claim 2 monitors analytical equipment on-line, feature exists
In：The Verification of Measuring Current Transformer and measurement export 5A electric currents and 57.74V voltages, the conversion with voltage transformer respectively
The analog quantity that current signal and voltage signal are converted to 0~5V with voltage transformer by Current Transformer and conversion respectively is believed
Number.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820315943.7U CN207965076U (en) | 2018-03-07 | 2018-03-07 | A kind of power supply system AC circuit breaker acting characteristic on-line monitoring analytical equipment |
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| CN201820315943.7U CN207965076U (en) | 2018-03-07 | 2018-03-07 | A kind of power supply system AC circuit breaker acting characteristic on-line monitoring analytical equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113552479A (en) * | 2021-08-12 | 2021-10-26 | 北京慧智神光科技有限公司 | Fault analysis capability evaluation method and system of circuit breaker monitoring device |
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2018
- 2018-03-07 CN CN201820315943.7U patent/CN207965076U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113552479A (en) * | 2021-08-12 | 2021-10-26 | 北京慧智神光科技有限公司 | Fault analysis capability evaluation method and system of circuit breaker monitoring device |
| CN113552479B (en) * | 2021-08-12 | 2023-10-31 | 北京慧智神光科技有限公司 | Fault analysis capability evaluation method and system of breaker monitoring device |
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