Simplified decoupling simulation study of non‐contact voltage measurement in distribution station area
Abstract The coupling capacitance between the line and the transducer cannot be ignored when making non‐contact voltage measurements on low‐voltage three‐phase power lines. This leads to an increase in the number of unknown capacitances, and the number of correlatable response voltage equations is l...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2024-04-01
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| Series: | IET Generation, Transmission & Distribution |
| Subjects: | |
| Online Access: | https://doi.org/10.1049/gtd2.13124 |
| _version_ | 1797226572064751616 |
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| author | Lina Liu Tao Wang Jie Shen Ruichao Li Fangshuo Li Ming Qu Xiaojun Li |
| author_facet | Lina Liu Tao Wang Jie Shen Ruichao Li Fangshuo Li Ming Qu Xiaojun Li |
| author_sort | Lina Liu |
| collection | DOAJ |
| description | Abstract The coupling capacitance between the line and the transducer cannot be ignored when making non‐contact voltage measurements on low‐voltage three‐phase power lines. This leads to an increase in the number of unknown capacitances, and the number of correlatable response voltage equations is less than the number of unknown coupling capacitances. In this paper, a simplified decoupling method is proposed based on the characteristics of triangular three‐phase lines erected in distribution areas. Firstly, the equivalent circuit measured by the voltage sensing mechanism during three‐phase operation is established, and the three‐phase line response voltage equation is derived. Secondly, this paper proposes a three‐phase line response voltage decoupling algorithm after designing the decoupling matrix. Then, this paper uses the least squares method to solve the coefficients in the equations. Finally, the three‐phase voltage fluctuations of the actual low‐voltage stations are simulated by simulation. The measured sensor voltage values are substituted into the algorithm to invert and calculate the three‐phase line voltage. The three‐phase phase error is less than 2°. The amplitude error is less than 1.77%. The experiment verifies the stability and accuracy of the proposed decoupling method. |
| first_indexed | 2024-04-24T14:27:02Z |
| format | Article |
| id | doaj.art-a82b5a9518014d2098bcffa2c8072b07 |
| institution | Directory Open Access Journal |
| issn | 1751-8687 1751-8695 |
| language | English |
| last_indexed | 2024-04-24T14:27:02Z |
| publishDate | 2024-04-01 |
| publisher | Wiley |
| record_format | Article |
| series | IET Generation, Transmission & Distribution |
| spelling | doaj.art-a82b5a9518014d2098bcffa2c8072b072024-04-03T04:40:57ZengWileyIET Generation, Transmission & Distribution1751-86871751-86952024-04-011871317132410.1049/gtd2.13124Simplified decoupling simulation study of non‐contact voltage measurement in distribution station areaLina Liu0Tao Wang1Jie Shen2Ruichao Li3Fangshuo Li4Ming Qu5Xiaojun Li6Metering Centre State Grid Sichuan Electric Power Company Chengdu ChinaMetering Centre State Grid Sichuan Electric Power Company Chengdu ChinaMetering Centre State Grid Sichuan Electric Power Company Chengdu ChinaMetering Centre State Grid Sichuan Electric Power Company Chengdu ChinaMetering Centre State Grid Sichuan Electric Power Company Chengdu ChinaMetering Centre State Grid Sichuan Electric Power Company Chengdu ChinaMetering Centre State Grid Sichuan Electric Power Company Chengdu ChinaAbstract The coupling capacitance between the line and the transducer cannot be ignored when making non‐contact voltage measurements on low‐voltage three‐phase power lines. This leads to an increase in the number of unknown capacitances, and the number of correlatable response voltage equations is less than the number of unknown coupling capacitances. In this paper, a simplified decoupling method is proposed based on the characteristics of triangular three‐phase lines erected in distribution areas. Firstly, the equivalent circuit measured by the voltage sensing mechanism during three‐phase operation is established, and the three‐phase line response voltage equation is derived. Secondly, this paper proposes a three‐phase line response voltage decoupling algorithm after designing the decoupling matrix. Then, this paper uses the least squares method to solve the coefficients in the equations. Finally, the three‐phase voltage fluctuations of the actual low‐voltage stations are simulated by simulation. The measured sensor voltage values are substituted into the algorithm to invert and calculate the three‐phase line voltage. The three‐phase phase error is less than 2°. The amplitude error is less than 1.77%. The experiment verifies the stability and accuracy of the proposed decoupling method.https://doi.org/10.1049/gtd2.13124capacitive sensorscomplex networkscoupled circuitsinverse problemsleast squares approximationsvoltage measurement |
| spellingShingle | Lina Liu Tao Wang Jie Shen Ruichao Li Fangshuo Li Ming Qu Xiaojun Li Simplified decoupling simulation study of non‐contact voltage measurement in distribution station area IET Generation, Transmission & Distribution capacitive sensors complex networks coupled circuits inverse problems least squares approximations voltage measurement |
| title | Simplified decoupling simulation study of non‐contact voltage measurement in distribution station area |
| title_full | Simplified decoupling simulation study of non‐contact voltage measurement in distribution station area |
| title_fullStr | Simplified decoupling simulation study of non‐contact voltage measurement in distribution station area |
| title_full_unstemmed | Simplified decoupling simulation study of non‐contact voltage measurement in distribution station area |
| title_short | Simplified decoupling simulation study of non‐contact voltage measurement in distribution station area |
| title_sort | simplified decoupling simulation study of non contact voltage measurement in distribution station area |
| topic | capacitive sensors complex networks coupled circuits inverse problems least squares approximations voltage measurement |
| url | https://doi.org/10.1049/gtd2.13124 |
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