利用矩阵变换求解电力系统短路故障的残压变换法

参数不对称元件的出现为对称分量法处理不对称故障的序网联接处理方法设置了障碍.该文针对之以相分量法故障处理方法为依据,建立了相分量坐标下适用于各种短路故障公式化的残压变换法,并以矩阵变换的方式完成不对称短路故障的处理：通过公式变换将该方法应用于对称分量坐标.使用矩阵运算代替对称分量法的传统序网故障变换,以实现不对称短路故障计算,并给出常见故障对应的参数矩阵.对于多重短路故障和含不对称元件的网络都能够直接处理,而计算量却不会明显增大.文中用实例证明了该方法简单实用,而且便于程序实现.

A RESIDUAL VOLTAGE TRANSFORMATION METHOD FOR SHORT-CIRCUIT CURRENT CALCULATION WITH MATRIX TRANSFORMATION

Unbalanced element brings a big problem to fault analysis of symmetrical components method. According with fault analysis of phase components, a residual voltage transformation method for short-circuit current calculation is presented with matrix translation in the place of classical sequence networks connection, which is suitable for both phase coordinates and symmetrical components coordinates. Calculation formulas are proposed with matrices calculation to deal with unsymmetrical faults and parameter matrices for various faults are listed. Analysis of simultaneous faults with unbalanced parameter element is done without calculation qualities increased. Simple examples have shown that the method is practical and suitable for programming.