Three-phase unbalanced compensation and its application in transformer region based on Wang's theorem

Author(s): Baoxuan Yea, Yuwu Wua, Bingzhang Tonga, Kangjian Wanga, Luqing Wanga, Xiangmin Huangb
a Hainan power grid Co., Ltd,Wenchang 571300, Hainan, China
b BENLIU Electrical Technology Co., Ltd, Guangzhou 510640, Guangdong, China
International Journal of Smart Grid and Clean Energy, vol. 8, no. 5, September 2019: pp. 574-579
ISSN: 2315-4462 (Print)
ISSN: 2373-3594 (Online)
Digital Object Identifier: 10.12720/sgce.8.5.574-579

Abstract: The passive component compensation for three-phase unbalance treatment at this stage is difficult to adapt to the load fluctuations and rapid changes in actual distribution network. Therefore, aiming at the goal of active power balance, firstly, the paper derives the formula of susceptance compensation among phases based on the Wang's theorem. Next, correct the basic formula and verify it by simulation, considering engineering factors such as actual line impedance, power supply asymmetry and so on. Finally, summarize a relatively complete configuration method of three-phase unbalance compensation in transformer region. The results show that the method can effectively improve the adaptability of the passive component compensation.

Keywords: three-phase unbalance; Wang’s theorem; passive component compensation; engineering application
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