Abstract：A novel idea to design an integration system of distribution transformer and static synchronous compensator(DT-STATCOM) is proposed. STATCOM is accessed in the system from the taps with appropriate voltage level at transformer high voltage winding, which helps to reduce the number of cascade power units, the current level of power devices and the heat loss. Meanwhile, in DT-STATCOM system, the content of harmonics injected into the system is reduced, and all of the load and transformer reactive power are compensated, reducing the line loss caused by reactive power transmission. For the characteristics of DT-STATCOM, this paper also proposes a command current calculating method based on the principle of reactive power balance, and adopts a hysteresis current control method with variable hysteresis-band. Simulation results show that both the structure and the control method proposed in this paper are correct and superior.
王存平, 尹项根, 张哲, 文明浩, 刘健, 熊卿. 配电变一体化STATCOM结构设计及其控制方法[J]. 电工技术学报, 2012, 27(9): 34-40.
Wang Cunping, Yin Xianggen, Zhang Zhe, Wen Minghao, Liu Jian, Xiong Qing. Structure Design and Control Method Research of DT-STATCOM. Transactions of China Electrotechnical Society, 2012, 27(9): 34-40.
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