Commutation Algorithm for Three-Phase Unbalanced Load Regulation in Distribution Network
Automatic phase commutation system is widely used to deal with the load imbalance problem in low voltage distribution network. It consists of an intelligent commutation terminal and a number of phase commutation switches. In the commutation switch, the compound switch of paralleled magnetic latching...
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| Format: | Article |
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State Grid Energy Research Institute
2020-03-01
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| Series: | Zhongguo dianli |
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| Online Access: | https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.201901104 |
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| author | Yongxia LI Yulei GONG Xiuxiao GUO Yanyan ZHAO |
| author_facet | Yongxia LI Yulei GONG Xiuxiao GUO Yanyan ZHAO |
| author_sort | Yongxia LI |
| collection | DOAJ |
| description | Automatic phase commutation system is widely used to deal with the load imbalance problem in low voltage distribution network. It consists of an intelligent commutation terminal and a number of phase commutation switches. In the commutation switch, the compound switch of paralleled magnetic latching relay and bidirectional thyristor is selected as commutation switch actuator, in which the thyristor is cut off by zero switching at the moment of commutation, and the magnetic latching relay is switched on without large current. The hardware devices are generally used to detect the zero crossing point on the line voltage. As high frequency harmonic waves exist on the line voltage, the zero crossing point is hard to be detected accurately, and dedicated phase trigging can not be implemented using this method. Therefore, the software method is used to calculate the line voltage phase, and a reliable commutation algorithm is adopted to realize the regulation of three-phase imbalance, which effectively prevents the impact impulse to load and power grid, consequently improving the reliability in triggering thyristor. Experimental results show that the proposed algorithm is feasible in solving three-phase unbalanced loads and improving power supply quality. |
| format | Article |
| id | doaj-art-231bc086f95a4e8da910962323c5b0b2 |
| institution | OA Journals |
| issn | 1004-9649 |
| language | zho |
| publishDate | 2020-03-01 |
| publisher | State Grid Energy Research Institute |
| record_format | Article |
| series | Zhongguo dianli |
| spelling | doaj-art-231bc086f95a4e8da910962323c5b0b22025-08-20T02:06:20ZzhoState Grid Energy Research InstituteZhongguo dianli1004-96492020-03-01533525810.11930/j.issn.1004-9649.201901104zgdl-53-2-liyongxiaCommutation Algorithm for Three-Phase Unbalanced Load Regulation in Distribution NetworkYongxia LI0Yulei GONG1Xiuxiao GUO2Yanyan ZHAO3School of Automation and Electrical Engineering, Jinan University, Jinan 250022, ChinaSchool of Automation and Electrical Engineering, Jinan University, Jinan 250022, ChinaShandong Kehua Electric Power Technology Co., Ltd., Jinan 250101, ChinaShandong Kehua Electric Power Technology Co., Ltd., Jinan 250101, ChinaAutomatic phase commutation system is widely used to deal with the load imbalance problem in low voltage distribution network. It consists of an intelligent commutation terminal and a number of phase commutation switches. In the commutation switch, the compound switch of paralleled magnetic latching relay and bidirectional thyristor is selected as commutation switch actuator, in which the thyristor is cut off by zero switching at the moment of commutation, and the magnetic latching relay is switched on without large current. The hardware devices are generally used to detect the zero crossing point on the line voltage. As high frequency harmonic waves exist on the line voltage, the zero crossing point is hard to be detected accurately, and dedicated phase trigging can not be implemented using this method. Therefore, the software method is used to calculate the line voltage phase, and a reliable commutation algorithm is adopted to realize the regulation of three-phase imbalance, which effectively prevents the impact impulse to load and power grid, consequently improving the reliability in triggering thyristor. Experimental results show that the proposed algorithm is feasible in solving three-phase unbalanced loads and improving power supply quality.https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.201901104three-phase imbalanceautomatic commutation systemmagnetic latching relaybidirectional thyristorcommutation algorithm |
| spellingShingle | Yongxia LI Yulei GONG Xiuxiao GUO Yanyan ZHAO Commutation Algorithm for Three-Phase Unbalanced Load Regulation in Distribution Network Zhongguo dianli three-phase imbalance automatic commutation system magnetic latching relay bidirectional thyristor commutation algorithm |
| title | Commutation Algorithm for Three-Phase Unbalanced Load Regulation in Distribution Network |
| title_full | Commutation Algorithm for Three-Phase Unbalanced Load Regulation in Distribution Network |
| title_fullStr | Commutation Algorithm for Three-Phase Unbalanced Load Regulation in Distribution Network |
| title_full_unstemmed | Commutation Algorithm for Three-Phase Unbalanced Load Regulation in Distribution Network |
| title_short | Commutation Algorithm for Three-Phase Unbalanced Load Regulation in Distribution Network |
| title_sort | commutation algorithm for three phase unbalanced load regulation in distribution network |
| topic | three-phase imbalance automatic commutation system magnetic latching relay bidirectional thyristor commutation algorithm |
| url | https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.201901104 |
| work_keys_str_mv | AT yongxiali commutationalgorithmforthreephaseunbalancedloadregulationindistributionnetwork AT yuleigong commutationalgorithmforthreephaseunbalancedloadregulationindistributionnetwork AT xiuxiaoguo commutationalgorithmforthreephaseunbalancedloadregulationindistributionnetwork AT yanyanzhao commutationalgorithmforthreephaseunbalancedloadregulationindistributionnetwork |