System and method for calculating real-time voltage stability risk index in power system using time series data

摘要

A system and method for calculating a real time voltage stability risk index in a power system are disclosed. The disclosed system comprises a real time phasor measurement device for calculating a voltage stability risk index using RMS voltage and an upper voltage stability monitoring system for collecting and sequencing the voltage stability risk index transferred from the real time phasor measurement device. The disclosed method comprises calculating RMS voltage by using bus voltage measured; calculating an N moving average voltage for the RMS voltages; calculating a % diversity between the bus voltage measured and the N moving average voltage; calculating a voltage stability risk index by dividing the area constructed by the % diversity by the number of sections; transferring the voltage stability risk index from a real time phasor measurement device to an upper voltage stability monitoring system; acquiring and sequencing the voltage stability risk indexes transferred.