双输出移相器的建模研究

双输出移相器为相间功率控制器的重要组成部分,现有双输出移相器稳态电路模型未计及其2条等值支路阻抗间的相互影响。基于变压器基本原理,推导了双输出移相器的三序等值电路,指出两等值阻抗间存在互阻抗,且该互阻抗不可忽略。采用PSCAD4.2软件对含计及2条支路阻抗间互阻抗的双输出移相器等值电路的单机无穷大系统进行了仿真,仿真结果验证了该等值电路的正确性,可为双输出移相器建模研究提供参考。

Research on Modeling of Dual Output Phase-Shifting Transformers

Dual output phase-shifting transformer is an important component of interphase power controller(IPC).In existing steady state circuit model of dual output phase-shifting transforemer the interaction between impedances of the two eqivalent branches is not considered.Based on basic theory of power transformer,positive-negative-and zero-sequence equivalent circuits of dual output phase-shifting transformer are derived,and it is pointed out that there is mutual impedance between the equivalent impeadances of the two branches,and the mutual impedance cannot be ignored.By use of PSCAD4.2 software,a single-machine infinite bus system,which contains the equivelent circuit of a dual output phase-shifting transforemer with two branches and the mutual impedance between the two branches are taken into account,is simulated.Simulation results show that the proposed equivalent circuit is correct and is available for reference to the modeling of dual output phase-shifting transforemer.