多并联支路型可控电抗器支路参数计算

支路电抗、电流和功率等参数的计算是多并联支路型可控电抗器分析设计的关键.文章详细阐述了顺次单支路工作模式,并给出了在已知最大谐波系数要求的条件下,支路个数和各支路容量的计算公式.根据顺次单支路工作模式各支路依次短路的特点,应用递推算法求解得到了支路电抗值的计算方法,由此得到了支路电压、电流和功率的计算公式,并指出为了简化设计和提高效率,应该使降压变压器的主绕组和控制绕组之间的短路阻抗尽量小.

Branch-Parameter Calculation for the Controllable Reactor of Multiply Parallel Branch Type

It is the key-point that the branch-parameters, such as reactances, currents, power and etc., are calculated for the controllable reactor of multiply parallel branch type. An operation mode, named step-single-branch operation mode, is described in this paper. It presents the formulae for computing branch number and each branch power with limited high harmonic level. Consequently, Based on the features that the branches are short-circuited in turn, each branch reactance is calculated by a recursion algorithm. And then, the formulae for calculating branch voltages, branch currents, and branch power are derived in the paper. It points out that the short-circuited impedance between main winding and control winding of the stepdown transformer should be as small as possible in order to simplify the design and improve the efficiency.