An Adaptive Protection Method for Power System under Wide Area Networks
The grid structure and its operation mood are becoming more complicated with the expansion of China Power Network which have higher requirement for security protection for relay protection network. This article proposes adaptive setting of switch positioner and line fault under wide area networks. Adaptive setting of switch positioner in system operation mode can effectively extend the protection scope of zone 2 impedance relay on the premise of protecting the cooperative relationship which has a better sensibility than traditional setting value of zone 2 impedance relay. Adaptive setting of line fault has high level of adaptation in system operation mode and sensitivity in each adjacent line which has lager protection scope than that of the traditional setting value and switch positioner.
Q. Y. Xu et al., "An Adaptive Protection Method for Power System under Wide Area Networks", Advanced Materials Research, Vols. 403-408, pp. 4189-4193, 2012