CN206281891U - A kind of temperature compensating type electronic type capacitance partial pressure transformer - Google Patents
A kind of temperature compensating type electronic type capacitance partial pressure transformer Download PDFInfo
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- CN206281891U CN206281891U CN201621298420.3U CN201621298420U CN206281891U CN 206281891 U CN206281891 U CN 206281891U CN 201621298420 U CN201621298420 U CN 201621298420U CN 206281891 U CN206281891 U CN 206281891U
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- temperature
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- 239000003990 capacitor Substances 0.000 claims abstract description 30
- 238000006243 chemical reaction Methods 0.000 claims description 18
- 238000012937 correction Methods 0.000 claims description 11
- 238000012545 processing Methods 0.000 claims description 9
- 230000003750 conditioning effect Effects 0.000 claims description 5
- 238000011897 real-time detection Methods 0.000 claims description 2
- 230000005611 electricity Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 239000011810 insulating material Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
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Abstract
The utility model provides a kind of temperature compensating type electronic type capacitance partial pressure transformer, including capacitance partial pressure sensor, temperature acquisition loop and secondary singal Acquisition Circuit；Capacitance partial pressure sensor includes that, by the bleeder circuit of high voltage arm capacitor and low-voltage arm capacitances in series, the two ends of bleeder circuit are used to connect voltage to be measured；The series connection point of high voltage arm capacitor and low-voltage arm electric capacity is dividing point, for exporting voltage division signal.Temperature acquisition loop includes being placed in the temperature sensor of capacitance partial pressure sensor high voltage arm capacitor and low-voltage arm capacitive side；Secondary singal Acquisition Circuit collection connection dividing point and temperature sensor, the temperature information collected according to temperature sensor carries out temperature-compensating to the voltage division signal of capacitance partial pressure sensor, so as to solve the problems, such as that exporting for the electronic type capacitance partial pressure transformer caused due to high voltage arm capacitor and low-voltage arm capacitance temperature difference is inaccurate.
Description
Technical field
The utility model belongs to intelligent substation electronic mutual inductor detection technique field, and in particular to a kind of temperature-compensating
Type electronic type capacitance partial pressure transformer.
Background technology
According to the operation principle of sensor, active electronic voltage transformer can be divided into electric resistance partial pressure type transformer, capacitance-resistance
Partial pressure type transformer and capacitance partial pressure type transformer.Under high-tension operating mode, electric resistance partial pressure type transformer is to insulating materials
It is required that higher, and there are problems that resistive element stability is poor, high-field electrode, easily cause larger measurement
Error；Resistive-capacitive voltage divider type transformer is difficult to ensure that because there is differential process loop and Integral Processing loop, its transient performance；And it is electric
Hold partial pressure type and use capacitances in series voltage divider principle, high-voltage signal of the direct progress of disease is applied than wide in power system, and
And harmonic performance is good.But electronic type capacitance partial pressure transformer is typically placed to outdoor, if the temperature generation of outdoor is larger
During change, the capacitance of high voltage arm capacitor and low-voltage arm electric capacity can be directly influenced so that the intrinsic standoff ratio of capacitance partial pressure sensor is not
Stabilization, so as to influence the degree of accuracy that voltage transformer is exported.
Existing method is, using the insulating materials of good heat conductivity and with a batch of capacitor, to carry out temperature cycles examination
Test, high voltage arm capacitor is tried one's best with the temperature coefficient of low-voltage arm electric capacity consistent, reduce temperature change to capacitance partial pressure sensor point
The influence of pressure ratio.
But the temperature coefficient of high voltage arm capacitor and low-voltage arm electric capacity is still inconsistent, and under some operating modes, when low
The distance between pressure arm electric capacity and high voltage arm capacitor farther out when, such as capacitance partial pressure transformer of column, low-voltage arm electric capacity and height
The temperature change of pressure arm electric capacity is also inconsistent, and temperature between the two has differences, therefore this method can not be completely eliminated temperature
Degree change exports the influence of the degree of accuracy to capacitance partial pressure transformer.
Utility model content
The utility model provides a kind of temperature compensating type electronic type capacitance partial pressure transformer, for solving due to high-voltage arm electricity
Hold and low-voltage arm capacitance temperature difference and the electronic type capacitance partial pressure transformer that causes the inaccurate problem of output.
The utility model provide technical scheme be：A kind of temperature compensating type electronic type capacitance partial pressure transformer, including electricity
Hold partial pressure sensor；The capacitance partial pressure sensor is included by the partial pressure electricity of high voltage arm capacitor and low-voltage arm capacitances in series
Road, the two ends of the bleeder circuit are used to connecting voltage to be measured, and the series connection point of high voltage arm capacitor and low-voltage arm electric capacity is provided with partial pressure
Point, for exporting voltage division signal；Also include temperature acquisition loop and secondary singal Acquisition Circuit；The temperature acquisition loop includes
The temperature sensor of capacitance partial pressure sensor high voltage arm capacitor and low-voltage arm capacitive side is placed in, for real-time detection high voltage arm capacitor
With the temperature information of low-voltage arm electric capacity；The secondary singal Acquisition Circuit gathers the partial pressure letter of capacitance partial pressure sensor output respectively
Number, and the real time temperature information that temperature sensor is collected, and the real time temperature information collected according to temperature sensor is to electricity
The voltage division signal for holding partial pressure sensor output carries out temperature-compensating.
Further, the low-voltage arm electric capacity is a capacitance group, and the capacitance group is by least two specification identicals electricity
Appearance is formed in parallel.
Further, the secondary singal Acquisition Circuit include be sequentially connected signal conditioning circuit, analog to digital conversion circuit,
Processor and photoelectric conversion module；
The dividing point and temperature sensor of signal processing circuit collection connection capacitance partial pressure sensor, for from electricity
The real time temperature information that the voltage division signal and temperature sensor that appearance partial pressure sensor is collected are collected is processed, and is then sent
To analog to digital conversion circuit；Analog-digital conversion circuit as described is used to for the electric signal that signal processing circuit is treated to be converted into digital letter
Number, and send it to processor；Processor is used for the real time temperature information according to high voltage arm capacitor and low-voltage arm electric capacity to dividing
Pressure signal is compensated, and sends it to photoelectric conversion module, and photoelectric conversion module is used to turn the voltage division signal after compensation
Turn to optical signal output.
Further, the temperature acquisition loop also includes temperature signal correction module, and temperature sensor is believed by temperature
Number correction module connecting secondary signal acquisition circuit；The temperature correction module is used for the temperature letter collected to temperature sensor
Breath is corrected.
A kind of temperature compensating type electronic type capacitance partial pressure transformer that the utility model is provided, is provided with temperature sensor, energy
Electronic type capacitance partial pressure transformer high voltage arm capacitor and low-voltage arm capacitance temperature information are enough detected, is then examined according to temperature sensor
The temperature information for measuring is compensated to the voltage division signal of capacitance partial pressure sensor, therefore, it is possible to solve due to high voltage arm capacitor and
The inaccurate problem of the output of low-voltage arm capacitance temperature difference and the electronic type capacitance partial pressure transformer that causes.And this practicality is new
Need not be consistent for the temperature coefficient of high voltage arm capacitor and low-voltage arm electric capacity by the technical scheme that type is provided, it is not required that right
Electronic type capacitance partial pressure transformer carries out temperature cycling test, and required cost is relatively low.
Brief description of the drawings
The low-voltage arm electric capacity that Fig. 1 is provided for embodiment using shunt capacitance temperature compensating type electronic type capacitance partial pressure mutual inductance
Device structure chart；
The low-voltage arm electric capacity that Fig. 2 is provided for embodiment using single electric capacity temperature compensating type electronic type capacitance partial pressure mutual inductance
Device structure chart.
Specific embodiment
The utility model provides a kind of temperature compensating type electronic type capacitance partial pressure transformer, for solving due to high-voltage arm electricity
Hold and low-voltage arm capacitance temperature difference and the electronic type capacitance partial pressure transformer that causes the inaccurate problem of output.
The utility model is described in detail below in conjunction with the accompanying drawings.
The present embodiment provides a kind of temperature compensating type electronic type capacitance partial pressure transformer, its structure as shown in figure 1, including electricity
Hold partial pressure sensor, temperature acquisition loop and secondary singal Acquisition Circuit.
Capacitance partial pressure sensor is included by high voltage arm capacitor C1With low-voltage arm electric capacity C2The bleeder circuit being in series, partial pressure
The two ends of circuit are used to connect voltage U to be measured0, high voltage arm capacitor C1With low-voltage arm electric capacity C2Series connection point be provided with dividing point, be used for
Output voltage division signal.
Temperature acquisition loop includes temperature sensor and temperature signal correction module, and temperature sensor is placed in capacitance partial pressure biography
The high voltage arm capacitor C of sensor1With low-voltage arm electric capacity C2Side, for detecting high voltage arm capacitor C1With low-voltage arm electric capacity C2Real-time temperature
Degree information, and send it to temperature signal correction module.Temperature signal correction module is used for what temperature sensor was collected
Temperature information is corrected.
Secondary singal Acquisition Circuit includes the signal conditioning circuit, analog to digital conversion circuit, FPGA module and the light that are sequentially connected
Electric modular converter.
The dividing point and temperature correction module of signal processing circuit collection connection capacitance partial pressure sensor, for from electric capacity
The voltage division signal that partial pressure sensor is collected is isolated, is amplified and filtering process, and the temperature that temperature sensor is collected
Degree information is converted into electric signal, and by the data is activation after treatment to analog-to-digital conversion and digital processing circuit.
Analog to digital conversion circuit is used for the telecommunications that voltage division signal and temperature information are changed into for treating signal processing circuit
Number data signal is converted into, and sends it to FPGA module.
FPGA module is used to enter voltage division signal trip temperature benefit according to the temperature information of high voltage arm capacitor and low-voltage arm electric capacity
Repay, and send it to photoelectric conversion module, photoelectric conversion module is defeated for the branch pressure voltage after compensation to be converted into optical signal
Go out.
FPGA module carries out temperature-compensating according to the temperature information of high voltage arm capacitor and low-voltage arm electric capacity to voltage division signal
Method is as follows：
If the magnitude of voltage of the voltage division signal of the capacitance partial pressure sensor that FPGA module is received is U', capacitance partial pressure sensor
Standard intrinsic standoff ratio be K, intrinsic standoff ratio under Current Temperatures is K', then using formulaU' is compensated, is obtained
Voltage division signal magnitude of voltage U after temperature-compensating.
Wherein intrinsic standoff ratio of the capacitance partial pressure sensor under Current Temperatures be
Standard intrinsic standoff ratio
P in formula1And p2The respectively temperature coefficient of electronic type capacitance partial pressure transformer high voltage arm capacitor and low-voltage arm electric capacity,
Δt1With Δ t2The electronic type capacitance partial pressure transformer high voltage arm capacitor and the Current Temperatures and 20 of low-voltage capacitance for respectively detecting
Difference between DEG C, C1And C2The respectively capacitance of high voltage arm capacitor and low-voltage arm electric capacity at 20 DEG C.
Used as other embodiment, low pressure divider resistance can be the electric capacity that multiple specification identical electric capacity are formed in parallel
Group, as illustrated in fig. 2, it is assumed that having each shunt capacitances of n in capacitance group, capacitance of each electric capacity at 20 DEG C is C0, then C2=n ×
C0, above-mentioned formula is updated accordingly, n is the positive integer more than 1.
As other embodiment, temperature signal correction module can be not provided with, and temperature sensor is collected
Temperature signal is transmitted directly to FPGA module, and FPGA module is compensated according to temperature signal to voltage division signal.
In the present embodiment, processor uses FPGA module, and used as other embodiment, processor can be using single
Other devices with data processing function such as piece machine, DSP.
In the present embodiment, secondary singal Acquisition Circuit be provided with signal conditioning circuit, analog to digital conversion circuit, FPGA module and
Photoelectric switching circuit；As other embodiment, using the processor with analog-digital conversion function, by being programmed in the processor
Upper setting signal conditioning functions.
The specific embodiment that the utility model is related to is presented above, but the utility model is not limited to described reality
Apply mode.Under the thinking that the utility model is given, to above-mentioned by the way of being readily apparent that to those skilled in the art
Technological means in embodiment enters line translation, replacement, modification, and plays a part of and the relevant art hand in the utility model
Section is essentially identical, utility model purpose that is realizing is also essentially identical, and the technical scheme for so being formed is that above-described embodiment is carried out
What fine setting was formed, this technical scheme is still fallen within protection domain of the present utility model.
Claims (4)
1. a kind of temperature compensating type electronic type capacitance partial pressure transformer, including capacitance partial pressure sensor；The capacitance partial pressure sensing
Device includes that the two ends of the bleeder circuit are treated for connection by the bleeder circuit of high voltage arm capacitor and low-voltage arm capacitances in series
The series connection point of survey voltage, high voltage arm capacitor and low-voltage arm electric capacity is provided with dividing point, for exporting voltage division signal；Characterized in that,
Also include temperature acquisition loop and secondary singal Acquisition Circuit；The temperature acquisition loop is high including being placed in capacitance partial pressure sensor
The temperature sensor of pressure arm electric capacity and low-voltage arm capacitive side, for the temperature letter of real-time detection high voltage arm capacitor and low-voltage arm electric capacity
Breath；The secondary singal Acquisition Circuit gathers the voltage division signal of capacitance partial pressure sensor output, and temperature sensor collection respectively
The real time temperature information for arriving, and the real time temperature information collected according to temperature sensor divides capacitance partial pressure sensor output
Pressure signal carries out temperature-compensating.
2. a kind of temperature compensating type electronic type capacitance partial pressure transformer according to claim 1, it is characterised in that described low
Pressure arm electric capacity is a capacitance group, and the capacitance group is formed in parallel by least two specification identical electric capacity.
3. a kind of temperature compensating type electronic type capacitance partial pressure transformer according to claim 1, it is characterised in that described two
Secondary signal acquisition circuit includes the signal conditioning circuit, analog to digital conversion circuit, processor and the photoelectric conversion module that are sequentially connected；
The dividing point and temperature sensor of the signal processing circuit collection connection capacitance partial pressure sensor, for dividing from electric capacity
The real time temperature information that the voltage division signal and temperature sensor that pressure sensor is collected are collected is processed, and is then sent to mould
Number change-over circuit；Analog-digital conversion circuit as described is used to for the electric signal that signal processing circuit is treated to be converted into data signal, and
Send it to processor；Processor is used for the real time temperature information according to high voltage arm capacitor and low-voltage arm electric capacity to voltage division signal
Compensate, and send it to photoelectric conversion module, photoelectric conversion module is used to for the voltage division signal after compensation to be converted into light
Signal output.
4. a kind of temperature compensating type electronic type capacitance partial pressure transformer according to claim 1, it is characterised in that the temperature
Degree acquisition circuit also includes temperature signal correction module, and temperature sensor is adopted by temperature signal correction module connecting secondary signal
Collector；The temperature correction module is used to be corrected the temperature information that temperature sensor is collected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621298420.3U CN206281891U (en) | 2016-11-29 | 2016-11-29 | A kind of temperature compensating type electronic type capacitance partial pressure transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621298420.3U CN206281891U (en) | 2016-11-29 | 2016-11-29 | A kind of temperature compensating type electronic type capacitance partial pressure transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206281891U true CN206281891U (en) | 2017-06-27 |
Family
ID=59074296
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621298420.3U Expired - Fee Related CN206281891U (en) | 2016-11-29 | 2016-11-29 | A kind of temperature compensating type electronic type capacitance partial pressure transformer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112286275A (en) * | 2020-09-16 | 2021-01-29 | 中国电力科学研究院有限公司 | Compensation method and device of active capacitive voltage divider |
| CN112816752A (en) * | 2020-12-22 | 2021-05-18 | 深圳供电局有限公司 | Temperature compensation method and equipment for capacitor transformer |
-
2016
- 2016-11-29 CN CN201621298420.3U patent/CN206281891U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112286275A (en) * | 2020-09-16 | 2021-01-29 | 中国电力科学研究院有限公司 | Compensation method and device of active capacitive voltage divider |
| CN112286275B (en) * | 2020-09-16 | 2022-09-20 | 中国电力科学研究院有限公司 | Compensation method and device of active capacitive voltage divider |
| CN112816752A (en) * | 2020-12-22 | 2021-05-18 | 深圳供电局有限公司 | Temperature compensation method and equipment for capacitor transformer |
| CN112816752B (en) * | 2020-12-22 | 2024-01-30 | 深圳供电局有限公司 | Temperature compensation method and equipment for capacitive mutual inductor |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170627 Termination date: 20201129 |
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| CF01 | Termination of patent right due to non-payment of annual fee |