CN104142487B - Electrified detecting device for tank type capacitor voltage transformer - Google Patents
Electrified detecting device for tank type capacitor voltage transformer Download PDFInfo
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- CN104142487B CN104142487B CN201410406259.6A CN201410406259A CN104142487B CN 104142487 B CN104142487 B CN 104142487B CN 201410406259 A CN201410406259 A CN 201410406259A CN 104142487 B CN104142487 B CN 104142487B
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Abstract
The invention provides an electrified detecting device for a tank type capacitor voltage transformer. The electrified detecting device comprises a temperature detecting unit connected with a fault recording unit, and a signal converting unit connected with the fault recording unit and an online verifying unit. The temperature data input end of the device comprises three temperature collecting points used for collecting the outdoor environment temperature and the temperature of the tested tank type capacitor voltage transformer. The voltage data input end is connected with the output end of the tested tank type capacitor voltage transformer and the output end of a standard tank type capacitor voltage transformer. Compared with the prior art, the electrified detecting device for the tank type capacitor voltage transformer can carry out long-term electrified detection on the tank type capacitor voltage transformer, record secondary end voltages of the transformer under different temperatures and detect the output voltage and the phase position.
Description
Technical field
The present invention relates to a kind of detection device for voltage mutual inductor, and in particular to a kind of can type capacitor voltage mutual inductor is powered
Detection means.
Background technology
Can type capacitor voltage mutual inductor is applied to voltage levels electrical network, especially extra-high voltage grid, compared to tradition
The maximum difference of column type capacitor formula voltage transformer is that the structure of capacitive divider is different.Column type capacitor formula voltage transformer
The dielectric of capacitive divider is the expendable organic insulation of insulating properties.The electricity of can type capacitor voltage mutual inductor
The dielectric for holding divider is the recoverable SF6 gases of insulating properties；Capacitive divider adopts coaxial clyinder structure, high pressure
Distribution capacity between electrode and middle piezoelectricity pole forms high-voltage capacitance C1 of can type capacitor voltage mutual inductor, middle piezoelectricity pole with it is outer
Distribution capacity between shell forms middle voltage capacitance C2 of can type capacitor voltage mutual inductor, middle piezoelectricity pole output connection electromagnetism list
Unit；Its high-voltage capacitance C1, middle voltage capacitance C2 and electromagnetic unit are enclosed in the housing full of SF6 gases.
Therefore, the design feature based on can type capacitor voltage mutual inductor, it is desirable to provide one kind can detect long-term powered
The device of the output signal of the can type capacitor voltage mutual inductor of operation, to meet the transmission of electricity requirement of voltage levels electrical network.
The content of the invention
In order to meet the needs of prior art, the invention provides a kind of can type capacitor voltage mutual inductor live detection dress
Put, described device includes the temperature detecting unit being connected with failure wave-recording unit, and respectively with the failure wave-recording unit and
The signal conversion unit of on-line testing unit connection；
The temperature data input of described device includes gathering outdoor environment temperature and tested can type capacitor voltage respectively
The temperature acquisition point of transformer temperature；The voltage data input of described device is mutual with the tested can type capacitor voltage respectively
The output end connection of sensor and standard can type capacitor voltage mutual inductor.
Preferably, the temperature acquisition point is separately positioned on sweat box, the tested can type capacitor voltage mutual inductor
Top and side；The temperature acquisition point of the sweat box is used to gather outdoor environment temperature；
Preferably, the temperature detecting unit includes temperature transmitter and sample resistance；The temperature transmitter will be measured
Temperature value be converted to 4～20mA current signals；The current signal is converted to voltage signal by the sample resistance, is sent to
The failure wave-recording unit；
Preferably, the signal conversion unit includes twin-stage autocoupling type inductive voltage divider and Overvoltage protecting unit；
The I levels iron core of the inductive voltage divider adopts cold-reduced silicon sheet iron core, II levels iron core to adopt permalloy iron core；Institute
Six sections of windings of winding on II level iron cores are stated, and separates five voltage taps；The rated primary voltage of the inductive voltage divider is
100V, the secondary output voltage of the inductive voltage divider includes 1.625V, 2V, 3.25V, 4V and 6.5V；
Preferably, the failure wave-recording unit includes signal processing unit, DSP processing units, memory and alarm unit；
The signal processing unit is based on the signal processing unit of FPGA, by the temperature detecting unit and the signal
The voltage signal step-down that converting unit sends is processed, and is converted to data signal；
The DSP processing units monitor the voltage that the signal processing unit sends according to fault threshold and fault type
Data；If the voltage data is less than the fault threshold, by voltage data timing storage to the normal of the memory
In rule memory cell；If the voltage data is more than the fault threshold, the voltage data timing storage is to the storage
In the fault memory cell of device, and alarm command is sent to the alarm unit；
The type of alarm of the alarm unit includes sending failure alarm signal with wireless network and is sent with wireless module
Alarming short message；
Preferably, the on-line testing unit is included at data acquisition module, programmable amplifier, A/D modular converters, DSP
Reason module and LCD liquid crystal display screen；
The electricity of the tested can type capacitor voltage mutual inductor that the data acquisition module sends to the signal conversion unit
Pressure signal UxWith the voltage signal U of standard can type capacitor voltage mutual inductornDifferential mode computing is carried out, pressure difference signal Δ U is obtained；Institute
Data acquisition module is stated including two output ends, the pressure difference signal Δ U and voltage signal U is exported respectivelyn；
The number of the programmable amplifier is two, respectively by the pressure difference signal Δ U and voltage signal UnAfter amplification
It is sent to the A/D modular converters and is converted to digital voltage signal；
The DSP processing modules calculate the amplitude and phase place of the pressure difference signal Δ U according to the digital voltage signal, and
It is sent to LCD liquid crystal display screen to show；
Preferably, the A/D modular converters include phase-locking frequency multiplication circuit, realize to the pressure difference signal Δ U and the electricity
Pressure signal UnAC sampling complete cycle；
Preferably, described device includes ups power, for the temperature detecting unit, signal conversion unit, online school
Verification certificate unit and failure wave-recording unit provide uninterrupted power source.
Compared with immediate prior art, the excellent effect of the present invention is：
1st, in technical solution of the present invention, failure wave-recording unit is able to record that the fault waveform of tested CVT and is reported to the police, bag
Include network alarming and SMS alarm two ways；
2nd, in technical solution of the present invention, on-line testing unit can be defeated with standard CVT to quick and precisely detecting tested CVT
Go out the ratio error and phase error of error signal；
3rd, in technical solution of the present invention, using ups power to temperature detecting unit, signal conversion unit, on-line testing list
Unit and failure wave-recording unit provide uninterrupted power source, it is ensured that detection means normal work；
4th, a kind of can type capacitor voltage mutual inductor measuring device with electricity that the present invention is provided, can be to can type capacitor electricity
Pressure transformer carries out long-term live detection, the secondary terminal voltage of transformer under record different temperatures；
5th, a kind of can type capacitor voltage mutual inductor measuring device with electricity that the present invention is provided, realizes the tank to longtime running
The output voltage detection of formula capacitance type potential transformer, output phase detection, precision reaches 0.1 grade.
Description of the drawings
Below in conjunction with the accompanying drawings the present invention is further described.
Fig. 1 is：A kind of can type capacitor voltage mutual inductor measuring device with electricity structure chart in the embodiment of the present invention；
Fig. 2 is：The connection diagram of temperature detecting unit in the embodiment of the present invention；
Fig. 3 is：The schematic diagram of temperature detecting unit in the embodiment of the present invention；
Fig. 4 is：Signal conversion unit fundamental diagram in the embodiment of the present invention；
Fig. 5 is：Inductive voltage divider structure chart in the embodiment of the present invention；
Fig. 6 is：The schematic diagram of failure wave-recording unit in the embodiment of the present invention；
Fig. 7 is：The schematic diagram of on-line testing unit in the embodiment of the present invention.
Specific embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from start to finish
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and be not considered as limiting the invention.
A kind of can type capacitor voltage mutual inductor measuring device with electricity that the present invention is provided, includes as shown in Figure 1 temperature number
According to input, voltage data input, temperature detecting unit, signal conversion unit, failure wave-recording unit, on-line testing unit and
Ups power.
1st, temperature detecting unit：
Temperature detecting unit is connected between temperature data input and failure wave-recording unit, for detecting outdoor environment temperature
The temperature of degree and tested can type capacitor voltage mutual inductor；
Temperature data input includes three temperature acquisition points, and collection point as shown in Figure 2 is separately positioned on sweat box, tested
The top and side of can type capacitor voltage mutual inductor；The temperature acquisition point of sweat box is used to gather outdoor environment temperature.
As shown in figure 3, temperature detecting unit includes temperature transmitter and sample resistance；
The temperature data of measurement is converted to 4～20mA current signals by temperature transmitter, and wherein thermistor believes temperature
Number resistance value is converted to, the resistance value is converted to 4～20mA current signals by temperature-current change-over circuit
Current signal is converted to voltage signal by sample resistance, is sent to the failure wave-recording unit.
2nd, signal conversion unit；
As shown in figure 4, signal conversion unit includes twin-stage autocoupling type inductive voltage divider and Overvoltage protecting unit；
①：Overvoltage protecting unit is used to carry out insulation blocking to the output signal of inductive voltage divider；
②：As shown in figure 5, the I levels iron core of twin-stage autocoupling type inductive voltage divider adopts cold-reduced silicon sheet iron in the present embodiment
Core, II levels iron core adopts permalloy iron core；
The uniform circle of coiling coil number hundred, excitation winding AX on I level iron cores；Six sections of winding A are wound on II level iron cores0X0,
And separate five voltage taps；The rated primary voltage of inductive voltage divider be 100V, the secondary output voltage bag of inductive voltage divider
Include 1.625V, 2V, 3.25V, 4V and 6.5V.The uniform coiling of winding can reduce winding leakage reactance, so as to reduce magnetic error.
3rd, failure wave-recording unit；
As shown in fig. 6, failure wave-recording unit includes signal processing unit, DSP processing units, memory and alarm unit；
①：Signal processing unit is based on the signal processing unit of FPGA, by temperature detecting unit and signal conversion unit
The voltage signal step-down of transmission is processed, and is converted to data signal；
②：The voltage data that DSP processing units send according to fault threshold and fault type, monitoring signals processing unit；
If voltage data is less than fault threshold, by voltage data timing storage in the conventional memory unit of memory；
If voltage data is more than fault threshold, by voltage data timing storage in the fault memory cell of memory, and to warning
Unit sends alarm command；Timing memory gap is 10～360 minutes in the present embodiment.
Output signal when conventional memory unit as stores can type capacitor voltage mutual inductor normal work in the present embodiment
Memory, relative fault memory cell be store can type capacitor voltage mutual inductor failure when output signal memory.
③：The type of alarm of alarm unit includes being sent failure alarm signal and being sent with wireless module with wireless network reporting
Alert note.
4th, on-line testing unit；
As shown in fig. 7, on-line testing unit includes data acquisition module, programmable amplifier, A/D modular converters, DSP process
Module, keyboard and LCD liquid crystal display screen；
①：Data acquisition module receives the voltage letter of the tested can type capacitor voltage mutual inductor that signal conversion unit sends
Number UxWith the voltage signal U of standard can type capacitor voltage mutual inductorn, and differential mode computing is carried out to the two, obtain pressure difference signal Δ
U；
Two output ends of data acquisition module, export pressure difference signal Δ U and voltage signal U to programmable amplifier respectivelyn；
②：The number of programmable amplifier is two, respectively by pressure difference signal Δ U and voltage signal UnA/D is sent to after amplification
Modular converter is converted to digital voltage signal；
③：A/D modular converters include phase-locking frequency multiplication circuit, realize to pressure difference signal Δ U and voltage signal UnComplete cycle
AC sampling；
④：DSP processing modules calculate the amplitude and phase place of pressure difference signal Δ U according to digital voltage signal, and are sent to LCD
LCDs shows；
⑤：Keyboard, is easy to technical staff to manipulate the method for computing data of DSP processing modules, is such as become using fast Fourier
The method changed calculates the amplitude and phase place of pressure difference signal Δ U.
5th, ups power；
For providing uninterrupted to temperature detecting unit, signal conversion unit, on-line testing unit and failure wave-recording unit
Power supply, it is ensured that the detection means normal work.
Finally it should be noted that：Described embodiment is only some embodiments of the present application, rather than the reality of whole
Apply example.Based on the embodiment in the application, those of ordinary skill in the art are obtained under the premise of creative work is not made
Every other embodiment, belong to the application protection scope.
Claims (7)
1. a kind of can type capacitor voltage mutual inductor measuring device with electricity, it is characterised in that described device includes and failure wave-recording
The temperature detecting unit of unit connection, and the signal conversion being connected with the failure wave-recording unit and on-line testing unit respectively
Unit；
The temperature data input of described device includes gathering outdoor environment temperature and tested can type capacitor voltage mutual inductance respectively
The temperature acquisition point of device temperature；The voltage data input of described device respectively with the tested can type capacitor voltage mutual inductor
Connect with the output end of standard can type capacitor voltage mutual inductor, the voltage data input connects with the signal conversion unit
Connect；
The failure wave-recording unit includes signal processing unit, DSP processing units, memory and alarm unit；
The signal processing unit is, based on the signal processing unit of FPGA, the temperature detecting unit and the signal to be changed
The voltage signal step-down that unit sends is processed, and is converted to data signal；
The DSP processing units monitor the voltage data that the signal processing unit sends according to fault threshold and fault type；
If the voltage data is less than the fault threshold, by the conventional storage of voltage data timing storage to the memory
In unit；If the voltage data is more than the fault threshold, the event of the voltage data timing storage to the memory
In barrier memory cell, and alarm command is sent to the alarm unit；
The type of alarm of the alarm unit includes being sent failure alarm signal and being sent with wireless module with wireless network reporting to the police
Note.
2. device as claimed in claim 1, it is characterised in that the temperature acquisition point is separately positioned on sweat box, the quilt
Survey the top and side of can type capacitor voltage mutual inductor；The temperature acquisition point of the sweat box is used to gather outdoor environment temperature
Degree.
3. device as claimed in claim 1, it is characterised in that the temperature detecting unit includes temperature transmitter and sampling electricity
Resistance；The temperature value of measurement is converted to 4～20mA current signals by the temperature transmitter；The sample resistance believes in the electric current
Number voltage signal is converted to, is sent to the failure wave-recording unit.
4. device as claimed in claim 1, it is characterised in that the signal conversion unit includes that twin-stage autocoupling type senses partial pressure
Device and Overvoltage protecting unit；
The I levels iron core of the inductive voltage divider adopts cold-reduced silicon sheet iron core, II levels iron core to adopt permalloy iron core；The II
Six sections of windings are wound on level iron core, and separates five voltage taps；The rated primary voltage of the inductive voltage divider be 100V, institute
Stating the secondary output voltage of inductive voltage divider includes 1.625V, 2V, 3.25V, 4V and 6.5V.
5. device as claimed in claim 1, it is characterised in that the on-line testing unit includes data acquisition module, program control
Amplifier, A/D modular converters, DSP processing modules and LCD liquid crystal display screen；
The voltage letter of the tested can type capacitor voltage mutual inductor that the data acquisition module sends to the signal conversion unit
Number UxWith the voltage signal U of standard can type capacitor voltage mutual inductornDifferential mode computing is carried out, pressure difference signal Δ U is obtained；The number
Include two output ends according to acquisition module, the pressure difference signal Δ U and voltage signal U is exported respectivelyn；
The number of the programmable amplifier is two, respectively by the pressure difference signal Δ U and voltage signal UnIt is sent to after amplification
The A/D modular converters are converted to digital voltage signal；
The DSP processing modules calculate the amplitude and phase place of the pressure difference signal Δ U according to the digital voltage signal, and send
Show to LCD liquid crystal display screen.
6. device as claimed in claim 5, it is characterised in that the A/D modular converters include phase-locking frequency multiplication circuit, and it is right to realize
The pressure difference signal Δ U and voltage signal UnAC sampling complete cycle.
7. device as claimed in claim 1, it is characterised in that described device includes ups power, for the temperature detection
Unit, signal conversion unit, on-line testing unit and failure wave-recording unit provide uninterrupted power source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410406259.6A CN104142487B (en) | 2014-08-18 | 2014-08-18 | Electrified detecting device for tank type capacitor voltage transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410406259.6A CN104142487B (en) | 2014-08-18 | 2014-08-18 | Electrified detecting device for tank type capacitor voltage transformer |
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| CN104142487A CN104142487A (en) | 2014-11-12 |
| CN104142487B true CN104142487B (en) | 2017-05-10 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105182269B (en) * | 2015-09-16 | 2018-04-06 | 国家电网公司 | A kind of voltage transformer tester with temperature measurement function |
| CN106646324B (en) * | 2017-01-25 | 2019-03-12 | 云南电网有限责任公司电力科学研究院 | A kind of CVT measurement error abnormality appraisal procedure and system |
| CN109116285A (en) * | 2018-08-22 | 2019-01-01 | 国网江苏省电力有限公司盐城供电分公司 | A kind of capacitance type potential transformer measuring device with electricity based on multi-signal acquisition |
| CN111948480A (en) * | 2020-08-17 | 2020-11-17 | 国网四川省电力公司成都供电公司 | GIS equivalent model and PT temperature characteristic and discharge map research platform based on same |
| CN113394013B (en) * | 2021-05-18 | 2022-06-07 | 南京博纳威电子科技有限公司 | Intelligent voltage transformer |
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| JPS5510567A (en) * | 1978-07-11 | 1980-01-25 | Nippon Denki Keiki Kenteishiyo | Test device for meter transformer |
| CN201438213U (en) * | 2009-07-16 | 2010-04-14 | 华东电力试验研究院有限公司 | Electronic current transformer polarity measurement system |
| CN102053191B (en) * | 2010-12-06 | 2012-09-12 | 国电南瑞科技股份有限公司 | Electronic voltage transformer using data fusion technology and error calibration method thereof |
| CN103616652B (en) * | 2013-11-23 | 2017-02-01 | 华中科技大学 | Error measurement method, system and application for capacitive voltage divider |
| CN103630867B (en) * | 2013-12-06 | 2016-10-12 | 国家电网公司 | A kind of charged calibration equipment of transformer |
| CN103954417B (en) * | 2014-04-09 | 2016-09-07 | 国家电网公司 | A kind of optical fiber current mutual inductor on-the-spot test method |
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Inventor after: Xu Sien Inventor after: Ding Guocheng Inventor after: Du Yan Inventor after: Qiu Jin Inventor after: Wang Ling Inventor after: Yu Chunyu Inventor after: Chen Xiaoming Inventor after: Chen Jiangbo Inventor after: He Yan Inventor after: Wang Shuping Inventor after: Zhu Sisi Inventor after: Wang Benjin Inventor after: Wu Shipu Inventor after: Li Wei Inventor after: Li Xuan Inventor after: Wang Xiaoqi Inventor after: Wang Liufang Inventor after: Mao Anlan Inventor after: Feng Yu Inventor before: Xu Sien Inventor before: Wang Ling Inventor before: Yu Chunyu Inventor before: Chen Xiaoming Inventor before: Chen Jiangbo Inventor before: He Yan Inventor before: Xu Jing Inventor before: Zhou Cuijuan Inventor before: Zhu Sisi Inventor before: Wang Benjin Inventor before: Wu Shipu Inventor before: Li Xuan Inventor before: Wang Xiaoqi Inventor before: Mao Anlan Inventor before: Feng Yu Inventor before: Du Yan Inventor before: Qiu Jin |
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Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Co-patentee after: CHINA ELECTRIC POWER RESEARCH INSTITUTE Co.,Ltd. Patentee after: State Grid Corporation of China Co-patentee after: STATE GRID JIANGSU ELECTRIC POWER Co.,Ltd. Address before: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Co-patentee before: China Electric Power Research Institute Patentee before: State Grid Corporation of China Co-patentee before: JIANGSU ELECTRIC POWER Co. |
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Effective date of registration: 20171219 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Co-patentee after: CHINA ELECTRIC POWER RESEARCH INSTITUTE Co.,Ltd. Patentee after: State Grid Corporation of China Co-patentee after: STATE GRID JIANGSU ELECTRIC POWER Co.,Ltd. Co-patentee after: ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID ANHUI ELECTRIC POWER Co. Address before: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Co-patentee before: CHINA ELECTRIC POWER RESEARCH INSTITUTE Co.,Ltd. Patentee before: State Grid Corporation of China Co-patentee before: STATE GRID JIANGSU ELECTRIC POWER Co.,Ltd. |
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