Principle and Design of the Cascaded STATCOM Integrated with Distribution Transformer
Chen Yu1, Wen Minghao1, Yin Xianggen1, Lei Ertao2, Cai Yijun1
1. State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan 430074 China; 2. Electric Power Research Institute of Guangdong Power Grid Corporation Guangzhou 510080 China
Abstract：Reactive power compensation has been widely used in distribution networks to decrease power losses and enhance voltage quality. To make full use of the spare capacity of the distribution transformer to achieve reactive compensation, this paper presented a cascaded static synchronous compensator (STATCOM) integrated with distribution transformer. The cascaded STATCOM is connected with the system via the primary wingding taps. Then, the compensation principle was proposed. The primary winding current distribution after the compensation current injection was also analyzed. Based on the law of the primary winding currents distribution, a suitable connection point voltage level could be selected. This paper proposed an improved command current detection method and adopted a passivity-based control method to track command current, which would improve the robustness of the control system. Both simulation and experimental results have verified the effectiveness of proposed system.
陈玉, 文明浩, 尹项根, 雷二涛, 蔡宜君. 配电变压器集成式级联STATCOM原理与设计[J]. 电工技术学报, 2018, 33(12): 2861-2872.
Chen Yu, Wen Minghao, Yin Xianggen, Lei Ertao, Cai Yijun. Principle and Design of the Cascaded STATCOM Integrated with Distribution Transformer. Transactions of China Electrotechnical Society, 2018, 33(12): 2861-2872.
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