MODEL SYSTEM TESTS ON A NEW NUMERIC METHOD OF POWER-SYSTEM FREQUENCY-MEASUREMENT

A numeric technique for the evaluation of power system frequency has b een implemented on a TMS320C31 digital signal processor, The frequency measuring equipment has been tested on programmable relay testing equ ipment, using known reference signals, and on a micromachine based pow er system simulator, The results show the frequency measuring equipmen t gives fast and accurate measurement under both steady-state and dyna mic conditions. The response of the equipment to instantaneous changes in phase and amplitude is found to be undesirable if the algorithm is to be applied to frequency measuring protection relays.