变压器式可控电抗器的限流电抗计算和仿真

在根据谐波要求确定了变压器式可控电抗器(CSRT)功率控制级数的基础上,把磁势平衡方程和支路电流方程相结合,得到了关于绕组电流和限流电抗的增广方程,再根据控制绕组顺次短路工作的特点,利用递推算法求出了CSRT的各级限流电抗值.利用多绕组变压器多边形等值电路模型,以MATLAB/PSB为平台,建立了CSRT的仿真模型.仿真算例的结果说明,CSRT不仅能够满足谐波因数指标的要求,而且具有分级平滑调节功率的控制特性和很快的反应速度.

Calculation and Simulation of a Controllable Reactor of Transformer Type

After the power-control steps number of a controllable shunting reactor of transformer type (CSRT) was figured out, an expanded equation for the current-limiting reactance is derived combining the magnetomotive force equations and the branch current equations. In addition, based on the feature that the control windings are short-circuited in turn, each current-limiting reactance was calculated by a recursion algorithm. Furthermore, the simulation model of CSRT was constructed employing the polygon equivalent circuit model of a multi-winding transformer and MATLAB/PSB. The simulation results show that CSRT not only satisfies the demand of harmonic coefficient, but also possesses the controllable characteristic of continuous stepwise variation in the power and very high speed of response.