Combination Optimization Configuration Method of Capacitance and Resistance Devices for Suppressing DC Bias in Transformers
The ground current of a high-voltage direct current (HVDC) transmission system can cause DC bias in transformers near the grounding electrode during monopole operations, which affects the alternating current (AC) power system operation. Owing to multiple bias current flow paths, a capacitance blocki...
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| Format: | Article |
| Language: | English |
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MDPI AG
2019-05-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/12/9/1813 |
| _version_ | 1798041773712343040 |
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| author | Donghui Wang Chunming Liu |
| author_facet | Donghui Wang Chunming Liu |
| author_sort | Donghui Wang |
| collection | DOAJ |
| description | The ground current of a high-voltage direct current (HVDC) transmission system can cause DC bias in transformers near the grounding electrode during monopole operations, which affects the alternating current (AC) power system operation. Owing to multiple bias current flow paths, a capacitance blocking device installed at the neutral point of a transformer may increase the DC bias in adjacent transformers, while suppressing the DC current in that transformer. This paper introduces the use of an effective bias current indicator to describe the effect of the grounding current on transformers in a network, considering the wiring characteristics of the autotransformers and the power system topology. Additionally, a combination optimization method for the capacitance and resistance is applied in order to determine the minimum number of installed devices that restrict the maximum effective bias current throughout the network to a permissible range. A genetic algorithm based on an improved roulette selection method is adopted to solve the optimal configuration problem. The method is validated by using a test case based on the Xizhe HVDC transmission receiving-end grid near the Jinsi grounding electrode. The configuration of the capacitance and resistance was optimized by the improved genetic algorithm. This method can achieve the desired level of DC bias management with fewer devices than the conventional method, which verifies the feasibility and superiority of the proposed optimization method. |
| first_indexed | 2024-04-11T22:26:18Z |
| format | Article |
| id | doaj.art-20d45b8bcaa741fca7787edb7f27ad4f |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-11T22:26:18Z |
| publishDate | 2019-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-20d45b8bcaa741fca7787edb7f27ad4f2022-12-22T03:59:38ZengMDPI AGEnergies1996-10732019-05-01129181310.3390/en12091813en12091813Combination Optimization Configuration Method of Capacitance and Resistance Devices for Suppressing DC Bias in TransformersDonghui Wang0Chunming Liu1School of Electrical and Electronic Engineering, North China Electric Power University, Beijing 102206, ChinaSchool of Electrical and Electronic Engineering, North China Electric Power University, Beijing 102206, ChinaThe ground current of a high-voltage direct current (HVDC) transmission system can cause DC bias in transformers near the grounding electrode during monopole operations, which affects the alternating current (AC) power system operation. Owing to multiple bias current flow paths, a capacitance blocking device installed at the neutral point of a transformer may increase the DC bias in adjacent transformers, while suppressing the DC current in that transformer. This paper introduces the use of an effective bias current indicator to describe the effect of the grounding current on transformers in a network, considering the wiring characteristics of the autotransformers and the power system topology. Additionally, a combination optimization method for the capacitance and resistance is applied in order to determine the minimum number of installed devices that restrict the maximum effective bias current throughout the network to a permissible range. A genetic algorithm based on an improved roulette selection method is adopted to solve the optimal configuration problem. The method is validated by using a test case based on the Xizhe HVDC transmission receiving-end grid near the Jinsi grounding electrode. The configuration of the capacitance and resistance was optimized by the improved genetic algorithm. This method can achieve the desired level of DC bias management with fewer devices than the conventional method, which verifies the feasibility and superiority of the proposed optimization method.https://www.mdpi.com/1996-1073/12/9/1813capacitance blocking deviceDC biasoptimal configurationresistance current limiting device |
| spellingShingle | Donghui Wang Chunming Liu Combination Optimization Configuration Method of Capacitance and Resistance Devices for Suppressing DC Bias in Transformers Energies capacitance blocking device DC bias optimal configuration resistance current limiting device |
| title | Combination Optimization Configuration Method of Capacitance and Resistance Devices for Suppressing DC Bias in Transformers |
| title_full | Combination Optimization Configuration Method of Capacitance and Resistance Devices for Suppressing DC Bias in Transformers |
| title_fullStr | Combination Optimization Configuration Method of Capacitance and Resistance Devices for Suppressing DC Bias in Transformers |
| title_full_unstemmed | Combination Optimization Configuration Method of Capacitance and Resistance Devices for Suppressing DC Bias in Transformers |
| title_short | Combination Optimization Configuration Method of Capacitance and Resistance Devices for Suppressing DC Bias in Transformers |
| title_sort | combination optimization configuration method of capacitance and resistance devices for suppressing dc bias in transformers |
| topic | capacitance blocking device DC bias optimal configuration resistance current limiting device |
| url | https://www.mdpi.com/1996-1073/12/9/1813 |
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