| 引用本文: | 程 湘,田 昊,周 群,徐方维,谢荣斌.考虑相位不平衡的智能换相开关控制策略[J].电力系统保护与控制,2021,49(6):48-55.[点击复制] |
| CHENG Xiang,TIAN Hao,ZHOU Qun,XU Fangwei,XIE Rongbin.Control strategy of intelligent commutation switch considering phase imbalance[J].Power System Protection and Control,2021,49(6):48-55[点击复制] |
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| 摘要: |
| 随着低压配电网中的用电规模逐渐扩大，日趋严重的三相不平衡导致损耗增加和设备安全问题。换相开关是解决该问题的根本方式，然而目前的换相开关方案仅考虑幅值不平衡，故其计算结果不够全面和准确。提出了一种智能换相开关策略。该策略的电流不平衡同时考虑幅值和相位，并将电流不平衡度和换相开关动作次数作为多目标函数，且对基于向量基因遗传算法的变异概率做出改进，以便于快速求解出最优换相开关组合。最后通过Matlab/Simulink实验，验证控制策略的有效性。实验结果表明，该智能换相开关策略可以有效改善配电台区的三相不平衡。 |
| 关键词: 换相开关 电流不平衡度 相位不平衡 变异概率 遗传算法 |
| DOI：DOI: 10.19783/j.cnki.pspc.200651 |
| 投稿时间：2020-06-08修订日期：2020-08-24 |
| 基金项目:国家自然科学基金项目资助(51877141) |
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| Control strategy of intelligent commutation switch considering phase imbalance |
| CHENG Xiang1,TIAN Hao1,ZHOU Qun1,XU Fangwei1,XIE Rongbin2 |
| (1. School of Electrical Engineering, Sichuan University, Chengdu 610065, China;
2. Guiyang Xifeng Power Supply Bureau of Guizhou Power Grid, Guiyang 551100, China) |
| Abstract: |
| With the increase in scale of power consumption in low-voltage distribution networks, three-phase imbalance problems are becoming more increasingly serious. This leads to increased losses and the safety problems of equipment. Use of a commutation switch is the fundamental way to solve this problem, but the current scheme only considers the amplitude imbalance. Thus its calculation results are not sufficiently comprehensive nor accurate. This paper proposes a type of intelligent commutation switch strategy, in which the amplitude and phase of current imbalance are considered simultaneously, and the current imbalance degree and the number of commutation switch actions are taken as the multi-objective function, and the mutation probability based on a vector gene genetic algorithm is improved. This determines the optimal commutation switch combination more quickly. Finally, the effectiveness of the proposed control strategy is verified by Matlab/Simulink experiment. The experimental results show that the intelligent switching strategy can effectively improve the three-phase imbalance in a distribution area.
This work is supported by the National Natural Science Foundation of China (No. 51877141). |
| Key words: commutation switch current imbalance degree phase unbalance mutation probability genetic algorithm |
