新型单心式独立型移相变压器及其调节特性研究

为提升高比例新能源配电网的潮流控制能力和精度，提出了一种新型单心式独立型移相变压器(SCIPST)，对调压绕组匝数配置进行了优化，通过独立控制2个调压绕组，SCIPST能够独立调节线路电压的相位和幅值。与传统移相变压器相比，增加了独立调节线路电压幅值的功能和可调移相角的数量，提高了调节精度。通过独立调节线路电压相位和幅值，能够在一定范围内实现独立调节线路有功、无功。介绍了SCIPST的拓扑结构，详细分析了工作原理并给出了控制策略。建立了SCIPST的仿真模型，对SCIPST调节电网潮流和电压的稳态和暂态性能进行仿真验证。研制出小容量SCIPST实验模型，搭建了潮流调节特性测试平台，开展了调节潮流模拟实验。仿真和实验结果证明了所提出的SCIPST的可行性和有效性。

Study on novel single-core independent phase-shifting transformer and regulation performance

In order to improve the power flow control ability and accuracy of high proportion new energy distribution network, a novel single-core independent phase-shifting transformer(SCIPST) is presented, the configuration of voltage regulation winding turns is optimized. By independently controlling the two voltage regulating windings, SCIPST can independently adjust the phase and amplitude of line voltage. Compared with the traditional phase-shifting transformer, the function of independently adjusting voltage amplitude and the number of adjustable phase-shifting angles are increased, and the adjustment accuracy is improved. By adjusting the voltage phase and amplitude independently, the active and reactive power of the line can be adjusted independently in a certain range. The topology structure of SCIPST is introduced, the working principle is analyzed in detail and the control strategy is given. The simulation model of SCIPST is established, and the steady-state and transient performance of SCIPST regulating power flow and voltage of power grid is simulated and verified. A small-capacity SCIPST experimental model is developed, a power flow control characteristic test platform is built, and a control power flow simulation experiment is carried out. Simulative and experimental results prove the feasibility and effectiveness of the proposed SCIPST.