SUB-HARMONIC DETECTION AND CONTROL SYSTEM

摘要

A distribution series capacitor control system is provided with a sub-harmon ic detection module (100) connected to an input signal and operable to detect t he presence of at least two distinct types of sub-harmonic content in the input signal. A logical signal processor (140) is electrically connected to the su b- harmonic detection module (100), and operates to independently determine the existence of self-excitation during induction motor starting and ferroresona nt phenomena based upon the at least two distinct types of sub-harmonic content , respectively. A system controller (142) is electrically connected to the logical signal processor (140) and operates to eliminate effects of self- excitation during induction motor starting and ferroresonant phenomena on th e system.