一种新相模变换矩阵

分析了现有相模变换矩阵,指出其单一模量不能反映所有故障类型的不足,结合均匀换位输电线路的相模变换矩阵应具有的数学性质,构造出一种新的相模变换矩阵.理论分析和应用于故障测距时的仿真结果表明,新矩阵能够用于相模变换,且单一模量能够反映所有故障类型.电网电压等级的提高对继电保护和断路器动作速度提出了更高的要求,为了适应该变化趋势,继电保护的运算将会在时域中进行,相模变换代替对称分量变换将成为发展趋势.因此,能够反映所有故障类型的相模变换矩阵在电力系统继电保护中将具有广泛的应用前景.

A Novel Phase-mode Transformation Matrix

Considering the problem that all currently available phase-mode transformation matrices can not reflect all types ot faults, a novel phase-mode transformation matrix is proposed in this paper. The proposed matrix is based on the relationship between the elements in matrix of transposition lines. Mode 1 and 2 transformed by using this matrix can reflect all types of faults. The results of fault location simulation have shown the validity of the new matrix. Stricter requirements are required for relay protection and responding speed of circuit breakers because of rising voltage class. Hence calculations of relaying should be carried out in the time domain. It is a trend that phase-mode transformation will replace symmetrical component transformation. Hence the proposed transformation matrix will find wider applications in the field of relay protection.