CN202351302U - Testing instrument for simulating unbalance current of serial compensating device - Google Patents
Testing instrument for simulating unbalance current of serial compensating device Download PDFInfo
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- CN202351302U CN202351302U CN2011204763193U CN201120476319U CN202351302U CN 202351302 U CN202351302 U CN 202351302U CN 2011204763193 U CN2011204763193 U CN 2011204763193U CN 201120476319 U CN201120476319 U CN 201120476319U CN 202351302 U CN202351302 U CN 202351302U
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Abstract
The utility model relates to the technical field of detection of unbalance current of large-scale serial compensating capacitance devices in the power industry, in particular to a testing instrument for simulating unbalance current of a serial compensating device. At home and aboard, a method for monitoring and detecting the unbalance degree of a capacitor group of a serial capacitance compensating device has the defects of low efficiency, large quantity of testing equipment leads, poor safety, high labor intensity and the like. In the testing instrument, a bridge type connecting loop is constructed by four groups of capacitor groups, and the balance condition of an electric bridge loop is measured by using a first current meter connected between a node connected between a first capacitor group and a third capacitor group, and a node connected between a second capacitor group and a fourth capacitor group to know the health level of the compensating capacitor group. The testing instrument has the advantages of simple and reasonable structure, simplification of a testing method and a testing process, great increase in testing efficiency, great improvement on safety, and great improvement on testing reliability.
Description
Technical field
The utility model relates to the detection technique field of the large-scale series compensation capacitance device of power industry out-of-balance current, specifically a kind of series compensation device simulation out-of-balance current tester.
Background technology
Large-scale compensator with series capaci tance high pressure long distance power transmission system at home is widely used, and the out-of-balance current protection is to guarantee one of important protection of large-scale series compensation device safety and stable operation.The test of series compensation device simulation out-of-balance current is exactly according to this protection philosophy, under device interruption maintenance state, and the method for testing of the uneven situation of compensation condenser group under the analogue means running status.Data through this method test gained can tentatively be understood the equilibrium state of compensation condenser group, and then understand the general level of the health of compensation condenser group.For before the new throwing or maintenance back capacitor group, can understand the quality of balance of the capacitor group of newly joining or overhaul through test, whether reach the service condition requirement, and with protect the definite value gap, be one of important test of series compensation device.Present home and abroad several method that compensator with series capaci tance capacitor group degree of unbalancedness (out-of-balance current) is monitored and checked, shortcoming such as it is low to exist efficient, and the measuring equipment lead-in wire is many, and security is relatively poor, and labour intensity is big.And the present invention overcomes above-mentioned shortcoming, improves testing efficiency and reliability greatly.
Summary of the invention
The purpose of the utility model provides a kind of convenient and out-of-balance current of series compensation device simulation efficiently tester, to overcome the deficiency of prior art, a kind of simple, reliable method of testing is provided simultaneously.
The technical scheme of the utility model is: form compensation system by four group capacitor groups; Four group capacitor groups constitute the bridge-type link circuit, are connected with the first reometer A1 between the node b between the node a between the first capacitor group C1 and the 3rd capacitor group C3 and the second capacitor group C2 and the 4th capacitor group C4; The first capacitor group C1 is connected the second reometer A2 with node between the second capacitor group C2, and the other end of the second reometer A2 and the 3rd capacitor group C3 are connected variable-frequency power sources with node between the 4th capacitor group C4; Cross-over connection has voltage table between the variable-frequency power sources two ends.
Further, the output voltage of described variable-frequency power sources is 180～210V, and frequency is 47.5Hz and 52.5Hz, to hide high strength power frequency electromagnetic environment, avoids the interference of 50 Hz electromagnetic fields to test, makes test data reliable and stable.
Further, the described first reometer A1 is the high-precision current table of accuracy class more than 2.0 grades, and measurement range is 0.01～10mA.
The utility model has the advantages that: simple and reasonable; Go here and there the test of the out-of-balance current of mending device with the method for dry run operating mode; Simplify method of testing and process; Understand the unbalanced situation of device quickly and easily, improve the testing efficiency and the security of device simulation out-of-balance current greatly, and improved testing reliability.
Description of drawings
Fig. 1 is the test philosophy figure of the utility model.
Embodiment
Embodiment 1
Can know from Fig. 1; The utility model is formed compensation system by four group capacitor groups; Four group capacitor groups constitute the bridge-type link circuit, are connected with the first reometer A1 between the node b between the node a between the first capacitor group C1 and the 3rd capacitor group C3 and the second capacitor group C2 and the 4th capacitor group C4; The first capacitor group C1 is connected the second reometer A2 with node between the second capacitor group C2, the node between the 3rd capacitor group C3 and the 4th capacitor group C4, and the other end of the second reometer A2 connects variable-frequency power sources; Cross-over connection has voltage table V between the variable-frequency power sources two ends.
In order to hide high strength power frequency electromagnetic environment; Avoid the interference of 50 Hz electromagnetic fields to test, make test data reliable and stable, the output voltage of described variable-frequency power sources is 180～210V; The preferred 200V of the output voltage of the variable-frequency power sources described in the present embodiment, frequency is 47.5Hz and 52.5Hz; The described first reometer A1 is the high-precision current table of accuracy class more than 2.0 grades, and measurement range is 0.01～10mA.
The utility model constitutes on the basis of bridge-type link circuit in four group capacitor groups of building-out capacitor; Be connected the first reometer A1 between the node b between the node a between the first capacitor group C1 and the 3rd capacitor group C3 and the second capacitor group C2 and the 4th capacitor group C4, to form the test loop of out-of-balance current; During work, at described bridge type return c, d end loading and frequency conversion power supply, through the balance in node a and node b measuring bridge loop.The electric capacity of perfect condition four group capacitor group C1, C2, C3, C4 is identical, bridge circuit balance then, and the voltage that capacitor group C1, C2, C3, C4 bear is basic identical, and the reading of the first reometer A1 is approximately zero; The capacity cell of any group capacitor group breaks down in capacitor group C1, C2, C3, C4; Cause that the capacitance balancing degree descends in the bridge circuit, the balance of bridge circuit is broken, when bridge circuit is uneven; The first reometer A1 has out-of-balance current to flow through; Can detect the health status of fault capacitor group, i.e. the degree of unbalancedness situation of compensation condenser group, and then understanding fault capacitor group damaged condition.
Claims (3)
1. a series compensation device is simulated the out-of-balance current tester; It is characterized in that: form compensation system by four group capacitor groups; Four group capacitor groups constitute the bridge-type link circuit, are connected with the first reometer A1 between the node b between the node a between the first capacitor group C1 and the 3rd capacitor group C3 and the second capacitor group C2 and the 4th capacitor group C4; The first capacitor group C1 is connected the second reometer A2 with node between the second capacitor group C2, and the other end of the second reometer A2 and the 3rd capacitor group C3 are connected variable-frequency power sources with node between the 4th capacitor group C4; Cross-over connection has voltage table between the variable-frequency power sources two ends.
2. like the described a kind of series compensation device simulation out-of-balance current tester of claim 1, it is characterized in that: the output voltage of described variable-frequency power sources is 180～210V, and frequency is 47.5Hz and 52.5Hz.
3. like the described a kind of series compensation device simulation out-of-balance current tester of claim 1, be characterized as: the described first reometer A1 is the high-precision current table of accuracy class more than 2.0 grades, and measurement range is 0.01～10mA.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204763193U CN202351302U (en) | 2011-11-25 | 2011-11-25 | Testing instrument for simulating unbalance current of serial compensating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204763193U CN202351302U (en) | 2011-11-25 | 2011-11-25 | Testing instrument for simulating unbalance current of serial compensating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202351302U true CN202351302U (en) | 2012-07-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204763193U Expired - Lifetime CN202351302U (en) | 2011-11-25 | 2011-11-25 | Testing instrument for simulating unbalance current of serial compensating device |
Country Status (1)
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| CN (1) | CN202351302U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103344843A (en) * | 2013-07-29 | 2013-10-09 | 国家电网公司 | Measurement system of series compensation capacitor group |
| CN104569672A (en) * | 2014-12-31 | 2015-04-29 | 上海思源电力电容器有限公司 | Power frequency superposition harmonic wave testing device for capacitor |
| CN107144737A (en) * | 2017-06-09 | 2017-09-08 | 华北电力科学研究院有限责任公司 | A kind of series capacitor compensation element fault monitoring method and device |
| CN107271751A (en) * | 2017-07-05 | 2017-10-20 | 国家电网公司 | Alternating current-direct current Capacitor stack out-of-balance current method of testing |
| CN110297123A (en) * | 2019-07-23 | 2019-10-01 | 中国南方电网有限责任公司超高压输电公司南宁局 | Series compensation device out-of-balance current test macro |
| CN112162139A (en) * | 2020-08-27 | 2021-01-01 | 国网宁夏电力有限公司检修公司 | Method, medium and system for measuring unbalanced current of high-voltage capacitor tower |
-
2011
- 2011-11-25 CN CN2011204763193U patent/CN202351302U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103344843A (en) * | 2013-07-29 | 2013-10-09 | 国家电网公司 | Measurement system of series compensation capacitor group |
| CN104569672A (en) * | 2014-12-31 | 2015-04-29 | 上海思源电力电容器有限公司 | Power frequency superposition harmonic wave testing device for capacitor |
| CN107144737A (en) * | 2017-06-09 | 2017-09-08 | 华北电力科学研究院有限责任公司 | A kind of series capacitor compensation element fault monitoring method and device |
| CN107271751A (en) * | 2017-07-05 | 2017-10-20 | 国家电网公司 | Alternating current-direct current Capacitor stack out-of-balance current method of testing |
| CN110297123A (en) * | 2019-07-23 | 2019-10-01 | 中国南方电网有限责任公司超高压输电公司南宁局 | Series compensation device out-of-balance current test macro |
| CN112162139A (en) * | 2020-08-27 | 2021-01-01 | 国网宁夏电力有限公司检修公司 | Method, medium and system for measuring unbalanced current of high-voltage capacitor tower |
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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 GRID CORPORATION OF CHINA Effective date: 20121231 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| C56 | Change in the name or address of the patentee |
Owner name: ZHANGJIAKOU POWER SUPPLY COMPANY, JI-BEI ELECTRIC Free format text: FORMER NAME: NORTH CHINA GRID CO., LTD. ZHANGJIAGANG POWER SUPPLY COMPANY |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 075000 Zhangjiakou City, Hebei province Qiaodong District Road No. 131 Street Patentee after: ZHANGJIAKOU POWER SUPPLY COMPANY OF JIBEI ELECTRIC POWER Co.,Ltd. Address before: 075000 Zhangjiakou City, Hebei province Qiaodong District Road No. 131 Street Patentee before: North China Grid Company Ltd. Zhangjiakou Branch |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20121231 Address after: 075000 Zhangjiakou City, Hebei province Qiaodong District Road No. 131 Street Patentee after: ZHANGJIAKOU POWER SUPPLY COMPANY OF JIBEI ELECTRIC POWER Co.,Ltd. Patentee after: State Grid Corporation of China Address before: 075000 Zhangjiakou City, Hebei province Qiaodong District Road No. 131 Street Patentee before: ZHANGJIAKOU POWER SUPPLY COMPANY OF JIBEI ELECTRIC POWER Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120725 |