In this paper, the localization issue associated with distance relay protecting a transmission line with static synchronous compensator (STATCOM) is discussed. Generally, distance relay is mal-operated due to the dynamic behaviour of STATCOM during its inductive and capacitive modes of operation. Because, STATCOM operation creates the problem of correct measurement of fault distance and is responsible of under-reach and over-reach of distance relay. Furthermore, high fault resistance is also the reason of under-reach along with STATCOM operation. To overcome aforementioned challenges, an adaptive wide-area backup protection scheme (WABPS) is addressed which compares the calculated impedance and referenced impedance. Calculated impedance is the difference between impedance measured by relay and impedance contributed by fault resistance. Referenced impedance is the sum of fault impedance and impedance contributed by STATCOM. If calculated impedance is less than referenced impedance, then the relay will generate a trip signal. Proposed WABPS is inherent directional and provides information about fault detection, fault distance, and fault resistance during dynamic operation of STATCOM. The performance of the proposed WABPS is evaluated using technology of synchronize phasor measurement and communication channel. A 230 kV, 50 Hz system with a 24-pulse STATCOM is simulated and validated using PSCAD/EMTDC software package.

本文讨论了与距离继电器保护静态同步补偿器（STATCOM）的传输线相关的定位问题。通常，由于STATCOM在其电感性和电容性工作模式期间的动态行为，因此距离继电器工作不正常。因为，STATCOM操作会产生正确测量故障距离的问题，并导致距离继电器的超范围和超范围。此外，高故障抗性也是STATCOM运行时触及不到的原因。为了克服上述挑战，提出了一种自适应广域备用保护方案（WABPS），该方案将计算出的阻抗和参考阻抗进行比较。计算出的阻抗是继电器测量的阻抗与故障电阻引起的阻抗之差。参考阻抗是故障阻抗和STATCOM贡献的阻抗之和。如果计算出的阻抗小于参考阻抗，则继电器将产生跳闸信号。提议的WABPS是固有的方向性，并提供有关STATCOM动态运行期间的故障检测，故障距离和故障电阻的信息。使用相量测量和通信信道同步技术评估了所提出的WABPS的性能。使用PSCAD / EMTDC软件包对带有24脉冲STATCOM的230 kV，50 Hz系统进行了仿真和验证。STATCOM动态运行期间的故障距离和故障电阻。使用相量测量和通信信道同步技术评估了所提出的WABPS的性能。使用PSCAD / EMTDC软件包对带有24脉冲STATCOM的230 kV，50 Hz系统进行了仿真和验证。STATCOM动态运行期间的故障距离和故障电阻。使用相量测量和通信信道同步技术评估了所提出的WABPS的性能。使用PSCAD / EMTDC软件包对带有24脉冲STATCOM的230 kV，50 Hz系统进行了仿真和验证。