Abstract：Aiming at the negative sequence compensation problem of the interconnected power supply system of traction substation group, the scheme and control strategy for negative sequence compensation based on a new type of traction compensation transformer and static var generator are proposed. The topologies of the traction compensation transformer and the negative sequence compensation scheme are studied. The compensation scheme is divided into compensation modes Ⅰ, Ⅱ and Ⅲ according to the number of reactive power compensation units. From the perspective of the active and reactive components of traction load current, the constraint factors of negative sequence and reactive power are defined respectively, and the mathematical models of negative sequence and reactive power comprehensive compensation under different compensation modes are constructed based on the transformer magnetic potential balance equation, port connection equation and symmetrical component method. The maximum reactive power compensation is defined as the basis to determine the compensation scheme. The double closed-loop control strategy of voltage and current for negative sequence compensation scheme is proposed, and the correctness and effectiveness of the compensation scheme and control strategy are verified by simulation. Based on the measured data of traction substation, the determination method of compensation scheme is analyzed, and the results show that appropriate compensation scheme can reduce the capacity of compensation device.
王辉, 李群湛, 解绍锋, 金安旭. 基于一种新型牵引补偿变压器的牵引变电群贯通供电系统负序补偿[J]. 电工技术学报, 2021, 36(10): 2140-2152.
Wang Hui, Li Qunzhan, Xie Shaofeng, Jin Anxu. Compensation of Interconnected Power Supply System of Traction Substation Group Based on a New Type of Traction Compensation Transformer. Transactions of China Electrotechnical Society, 2021, 36(10): 2140-2152.
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