Power system transformer substation voltage stability of line assessment and arrangement scheme of pmu

Considered the optimum arrangement scheme of PMU in a region of electric network, this paper primary introduced the definition of voltage stability´s weak nodes and their region through a tidal current emulation and calculation method. The optimum arrangement scheme of PMU in electric network was also given. The Least-square procedure method was used in solving the equivalent resistance, which completed the weak node´s dynamic voltage stability evaluation. The estimative accuracy of the scheme has been indicated according to the result of simulating test, which presents a theory method lying the foundation for the dynamic voltage stability evaluation of wide region electric power network.