Abstract:A new approach for measuring the distribution parameters of long distance quadruple-circuit transmission lines was proposed. A transformation matrix was introduced for the linear transformation of the distributed parameter matrixes and the transmission line equations. The transmission equations were solved by Laplace transform method and the analytic expressions of the distribution parameters were deduced. The distribution parameters can be accurately calculated by using two-end synchronous or asynchronous sampled voltages and currents of the quadruple-circuit lines. The incremental method was used to decrease the influence of interference on the measurement results. PSCAD software was employed to verify the proposed method. The simulation results suggest that the proposed method overcomes the complexity of the measurement process of the single-end methods and the high dependency of data synchronization of the existing two-end methods. The proposed method can accurately measure the distribution parameters of the lines in the condition of asynchronous measurement. The proposed method which takes fully account of the distribution effect simplifies the measurement procedure significantly, and can accurately measure the positive sequence parameters and zero sequence parameters of long distance lines in off-line or on-line situations.
胡志坚, 倪识远. 同塔四回线路分布参数的测量[J]. 电工技术学报, 2018, 33(3): 563-572.
Hu Zhijian, Ni Shiyuan. A New Approach to Measure the Distributed Parameters of Quadruple-Circuit Transmission Lines. Transactions of China Electrotechnical Society, 2018, 33(3): 563-572.
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