同杆双回线跨线故障最优跳闸方案

Optimal Trip Schemes of Double-circuit Lines on the Same Tower for Crossing-line Faults

以六序分量法为基础,通过对同杆双回线系统在故障以及故障切除后的非全相运行状态下的最大传输容量的分析,提出了适用于同杆双回线的最优跳闸方案。与目前国内传统跳闸方式相比,该方案可以最大限度地保留系统的传输能力,抑制注入系统的不对称分量,提高系统稳定裕度,为重合闸等自动装置的成功动作创造了条件。动模实验和软件仿真结果验证了该方案的有效性。

Based on the analysis of the transmission capability of double-circuit transmission lines on the same tower in fault states and unbalanced states using six-sequence component method, an optimal trip scheme for double-circuit transmission lines on the same tower is proposed. Compared to the traditional trip schemes, the proposed scheme has advantages on maintaining the system transmission capability, and restraining the unbalanced components injected into system. It is available to improve the system stability, and creates better operation conditions for auto-devices like auto-recloser. Dynamic simulation and BPA simulation have proven the conclusions,