Analysis of capacitance current compensation of current differential protection on four-parallel lines

作者：Zhang, Qibing^*; Tai, Nengling; Yuan, Cheng; Chen, Kangming

来源：Automation of Electric Power Systems, 2010, 34(1): 46-50.

• Capacitance current
• Capacitance current compensation
• Current differential protection
• Distributed capacitance
• EHV transmission line
• Parallel line
• Six-sequence component method
• Time domain solution

The application of current differential protection on EHV transmission lines is mainly affected by the distributed capacitance current. Such an effect is even more significant in four-parallel lines due to the increased number of circuits and increased amount of mutual distributed capacitance. Based on the ∏model of transmission lines, this paper proposes to decouple the four-parallel lines capacitance current compensation formula by utilizing the six-sequence component method and presents a time domain solution to compensate the capacitance current on four-parallel lines. Simulation result by PSCAD/EMTDC shows that this new capacitance current compensation scheme can effectively enhance the performance of current differential protection.

• 出版日期2010
• 单位上海交通大学