CN201955383U - Measuring device for directly measuring voltage difference between two high-voltage ends - Google Patents
Measuring device for directly measuring voltage difference between two high-voltage ends Download PDFInfo
- Publication number
- CN201955383U CN201955383U CN2011200406430U CN201120040643U CN201955383U CN 201955383 U CN201955383 U CN 201955383U CN 2011200406430 U CN2011200406430 U CN 2011200406430U CN 201120040643 U CN201120040643 U CN 201120040643U CN 201955383 U CN201955383 U CN 201955383U
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- CN
- China
- Prior art keywords
- voltage
- comparer
- voltage divider
- divider
- measuring
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- Expired - Lifetime
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- 238000005259 measurement Methods 0.000 claims abstract description 21
- 238000004364 calculation method Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- SFZCNBIFKDRMGX-UHFFFAOYSA-N Sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229960000909 sulfur hexafluoride Drugs 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Abstract
The utility model relates to the technical field of measuring voltage difference between high-voltage ends, in particular to a measuring device for directly measuring voltage difference between two high-voltage ends. The measuring device comprises a high-voltage end contact UA and a high-voltage end contact UB, the high-voltage end contact UA is connected with a high-voltage arm of a first voltage divider, the high-voltage end contact UB is connected with a high-voltage arm of a second voltage divider, a low-voltage arm of the first voltage divider is connected to an end U1 of a voltage differential gauge, a low-voltage arm of the second voltage divider is connected to an end U2 of the voltage differential gauge, and the low-voltage arms of the first voltage divider and the second voltage divider are respectively grounded through ground ends. The measuring device can be used for measuring the voltage difference between two high-voltage ends through the voltage dividers, is higher in measuring precision and shorter in measuring time than the traditional method of using two gauges to respectively measure and calculate, and reading errors and calculation time delay caused by voltage change in measurement by two gauges can be avoided.
Description
Technical field
The utility model relates to the differential pressure measurement technical field of voltage between the high voltage end, is specifically related to a kind of measurement mechanism that is used for directly measuring two high voltage end voltage differences.
Background technology
In the prior art, the high-tension measurement of power frequency is generally adopted capacitive divider or RC divider to add the common voltage table and is measured, and also available high voltage potential transformer is measured.Yet voltage transformer (VT) is because volume is big, and the device body is heavy, and difficult is used in measuring seldom at the scene; And general voltage divider can only be measured the voltage-to-ground of a point, when measuring the voltage difference of two points, can only calculate potential difference then with the voltage-to-ground of two points of two voltage divider independent measurements, the voltage of reading two under the situation of variation in voltage simultaneously is very difficult, causes the meter reading error.Calculating needs the time, voltage might be risen so high in the process of boosting.
Summary of the invention
The purpose of this utility model is to avoid the deficiency of existing voltage measuring apparatus and a kind of measurement mechanism that is used for directly measuring two high voltage end voltage differences is provided, and the measuring method that it adopts voltage divider to transform efficiently solves problems of the prior art.
For achieving the above object, the technical solution adopted in the utility model is: the described measurement mechanism that is used for directly measuring two high voltage end voltage differences, its characteristics are: described measurement mechanism comprises high-pressure side contact U
AWith high-pressure side contact U
B, high-pressure side contact U
ALink to each other high-pressure side contact U with the high-voltage arm of first voltage divider
BLink to each other differential pressure indicator U with the high-voltage arm of second voltage divider
1The low-voltage arm of termination first voltage divider, differential pressure indicator U
2The low-voltage arm of termination second voltage divider, first voltage divider and second voltage divider by earth terminal ground connection.
Described differential pressure indicator U
1End links to each other by the positive input terminal of signal processing module with first comparer, and the output terminal of first comparer links to each other with the positive input terminal of the 3rd comparer; Differential pressure indicator U
2End links to each other by the positive input terminal of signal processing module with second comparer, the output terminal of second comparer links to each other with the negative input end of the 3rd comparer, the output termination voltage display module of the 3rd comparer, the negative input end of first comparer and second comparer is ground connection respectively.
Described first voltage divider is identical with the intrinsic standoff ratio of second voltage divider.
The described measurement mechanism that is used for directly measuring two high voltage end voltage differences, its beneficial effect that has is: it is by the setting of voltage divider, can measure two voltage differences between the high-pressure side in real time, measure Calculation Method measuring accuracy height then respectively than two traditional tables, the response time is fast.The delay of change in voltage causes when having avoided two tables to measure respectively meter reading sum of errors computing time.
Description of drawings
Fig. 1 is used for directly measuring the circuit theory synoptic diagram of the measurement mechanism of two high voltage end voltage differences for the utility model;
Fig. 2 is the differential pressure indicator circuit structure schematic diagram among the utility model Fig. 1;
Fig. 3 is the structure principle chart of the utility model embodiment 1;
Fig. 4 is test precedence diagram pressing time of the utility model embodiment 1;
Fig. 5 is the structure principle chart of the utility model embodiment 2.
Among the figure: 1, first voltage divider; 2, differential pressure indicator; 3, second voltage divider; 4, first comparer; 5, second comparer; 6, the 3rd comparer; 7, voltage display module; 8, signal processing module.
Below in conjunction with embodiment the utility model is further described.
Embodiment
Be described in further detail below in conjunction with most preferred embodiment:
As Fig. 1 and 2, the described measurement mechanism that is used for directly measuring two high voltage end voltage differences, its characteristics are: described measurement mechanism comprises high-pressure side contact U
AWith high-pressure side contact U
B, high-pressure side contact U
ALink to each other high-pressure side contact U with the high-voltage arm of first voltage divider 1
BLink to each other the U of differential pressure indicator 2 with the high-voltage arm of second voltage divider 3
1The low-voltage arm of termination first voltage divider 1, the U of differential pressure indicator 2
2The low-voltage arm of termination second voltage divider 3, first voltage divider 1 and the low-voltage arm of second voltage divider 2 respectively by earth terminal ground connection.
The U of described differential pressure indicator 2
1End links to each other with the positive input terminal of first comparer 4 by signal processing module 8, and the output terminal of first comparer 4 links to each other with the positive input terminal of the 3rd comparer 6; The U of differential pressure indicator 2
2End links to each other with the positive input terminal of second comparer 5 by signal processing module 8, the output terminal of second comparer 5 links to each other with the negative input end of the 3rd comparer 6, output termination voltage display module 7, the first comparers 4 of the 3rd comparer 6 and the negative input end of second comparer 5 be ground connection respectively.
Described first voltage divider 1 is identical with the intrinsic standoff ratio of second voltage divider 3.
The described measurement mechanism that is used for directly measuring two high voltage end voltage differences, it is by the measurement of voltage table from the low pressure end of two voltage dividers, thereby obtains the measurement of two high voltage end voltage differences.Its principle is as follows:
As high-pressure side contact U
AVoltage-to-ground be U
A, as high-pressure side contact U
BThe voltage-to-ground of point is U
B, the intrinsic standoff ratio of two voltage dividers is K
1And K
2, voltage divider low-voltage arm voltage is respectively U
1And U
2, then
Embodiment 1: see Fig. 3 and Fig. 4, induced over voltage withstand test applied the measurement of voltage when the utility model was used for transformer length, adopted single-phase pressuring method, the non-pressurised terminal ground connection of low-pressure side, high-pressure side neutral-point solid ground.By being put on line end, tests voltage, its measuring principle figure such as accompanying drawing 3, and among the figure: V is a voltage table; CT is a current transformer; A is a reometer; C
1, C
2Be high pressure, medium-tension bushing electric capacity; Z
1, Z
2For detecting impedance.
During test, disturb in order to reduce corona, high, intermediate voltage terminal all adds equal pressure cap, the time sequencing that applies trial voltage as shown in Figure 4, A=5min wherein; B=5min; C=52s; D=60min; E=5min; Test procedure is as follows:
Be not more than energized under the voltage of 1/3U2; Boost to 1.1Um/
, keep 5min; Boost to U2 again, keep 5min; Boost to U1 again, the duration is 120*50/f; Be depressurized to U2 then immediately incessantly, keep 60min, and carry out measurement of partial discharge; Be depressurized to 1.1Um/ again
, keep 5min; When being reduced to 1/3U2 again, voltage cuts off the electricity supply when following; When during applying trial voltage whole, testing, the monitoring partial discharge quantity; The voltage-to-ground value is: U1=1.7Um/
=363kV; U2=1.3Um/
=277kV.
Embodiment 2: see Fig. 5, the utility model is used for the sulfur hexafluoride breaker withstand voltage test, withstand voltage test principle such as Fig. 5 between fracture, and wherein Tr is a pressure regulator; T is an exciting transformer; L is a reactor; Ck is a voltage divider electric capacity; Cx is a test product; CT is a current transformer; The size that applies voltage in the process of boosting between the isolating switch fracture is directly monitored with a differential pressure voltage table in real time by two voltage divider K.
Claims (3)
1. measurement mechanism that is used for directly measuring two high voltage end voltage differences, it is characterized in that: described measurement mechanism comprises high-pressure side contact U
AWith high-pressure side contact U
B, high-pressure side contact U
ALink to each other high-pressure side contact U with the high-voltage arm of first voltage divider
BLink to each other differential pressure indicator U with the high-voltage arm of second voltage divider
1The low-voltage arm of termination first voltage divider, differential pressure indicator U
2The low-voltage arm of termination second voltage divider, first voltage divider and second voltage divider by earth terminal ground connection.
2. the measurement mechanism that is used for directly measuring two high voltage end voltage differences as claimed in claim 1 is characterized in that: described differential pressure indicator U
1End links to each other by the positive input terminal of signal processing module with first comparer, and the output terminal of first comparer links to each other with the positive input terminal of the 3rd comparer; Differential pressure indicator U
2End links to each other by the positive input terminal of signal processing module with second comparer, the output terminal of second comparer links to each other with the negative input end of the 3rd comparer, the output termination voltage display module of the 3rd comparer, the negative input end of first comparer and second comparer is ground connection respectively.
3. the measurement mechanism that is used for directly measuring two high voltage end voltage differences as claimed in claim 1 or 2, it is characterized in that: described first voltage divider is identical with the intrinsic standoff ratio of second voltage divider.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200406430U CN201955383U (en) | 2011-02-17 | 2011-02-17 | Measuring device for directly measuring voltage difference between two high-voltage ends |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200406430U CN201955383U (en) | 2011-02-17 | 2011-02-17 | Measuring device for directly measuring voltage difference between two high-voltage ends |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201955383U true CN201955383U (en) | 2011-08-31 |
Family
ID=44499491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200406430U Expired - Lifetime CN201955383U (en) | 2011-02-17 | 2011-02-17 | Measuring device for directly measuring voltage difference between two high-voltage ends |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201955383U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102175904A (en) * | 2011-02-17 | 2011-09-07 | 甘肃电力科学研究院 | Measurement device for directly measuring voltage difference between two high voltage ends |
| CN103149417A (en) * | 2013-01-30 | 2013-06-12 | 北京信诺达泰思特科技股份有限公司 | Circuit measuring module and method for measuring voltage difference of power source device |
| CN107870259A (en) * | 2016-09-27 | 2018-04-03 | 意法半导体股份有限公司 | There is the HV voltage comparators of muting sensitivity to technique/temperature and power source change |
| CN110501549A (en) * | 2019-07-19 | 2019-11-26 | 武汉大学 | A kind of measurement method of tower body impact high voltage |
-
2011
- 2011-02-17 CN CN2011200406430U patent/CN201955383U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102175904A (en) * | 2011-02-17 | 2011-09-07 | 甘肃电力科学研究院 | Measurement device for directly measuring voltage difference between two high voltage ends |
| CN103149417A (en) * | 2013-01-30 | 2013-06-12 | 北京信诺达泰思特科技股份有限公司 | Circuit measuring module and method for measuring voltage difference of power source device |
| CN107870259A (en) * | 2016-09-27 | 2018-04-03 | 意法半导体股份有限公司 | There is the HV voltage comparators of muting sensitivity to technique/temperature and power source change |
| US10491118B2 (en) | 2016-09-27 | 2019-11-26 | Stmicroelectronics S.R.L. | High voltage comparator with low-sensitivity to variations of process/temperature and supply |
| CN110501549A (en) * | 2019-07-19 | 2019-11-26 | 武汉大学 | A kind of measurement method of tower body impact high voltage |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: STATE ELECTRIC NET CROP. Free format text: FORMER OWNER: GANSU ELECTRIC POWER RESEARCH INSTITUTE Effective date: 20130930 Owner name: GANSU ELECTRIC POWER RESEARCH INSTITUTE Effective date: 20130930 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 730050 LANZHOU, GANSU PROVINCE TO: 100031 DONGCHENG, BEIJING |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20130930 Address after: 100031 West Chang'an Avenue, Beijing, No. 86 Patentee after: State Grid Corporation of China Patentee after: Gansu Electric Power Research Institute Address before: Qilihe District of Gansu city in Lanzhou Province, 730050 West East Road No. 648 Patentee before: Gansu Electric Power Research Institute |
|
| CX01 | Expiry of patent term |
Granted publication date: 20110831 |
|
| CX01 | Expiry of patent term |