SYNCHRONOUS PHASOR MEASURING DEVICE AND INTER-BUS PHASE ANGLE DIFFERENCE MEASURING DEVICE EMPLOYING IT

摘要

Using a real time frequency and time series data of instantaneous value of voltage, time series estimation data of voltage instantaneous value and an estimation value of voltage at current moment in time are calculated by a method of least squares. Effective value of voltage at current moment in time is determined using the time series estimation data of instantaneous value of voltage thus calculated, synchronous phasor and the degree of voltage distortion at current moment in time are determined using the effective value of voltage at current moment in time and the estimation value of voltage at current moment in time , and phase differenceof inter-bus synchronous phasor is also determine.