Chaos Detection Method for Power Quality Disturbance

Chaos detection is a kind of signal processing method within the scope of time domain, and has broad applications. The method applies chaos system of its sensitivity to parameters alteration to make its periodical solution yield a dramatic change to detect faint signal. Even if the amplitude of the disturbed signal is extremely tiny, chaos system also can generate a substantial phase variation to it. Existence, amplitude and duration of the disturbed signal can be identified by discriminating operational status of chaos system. By the use of it in power quality disturbances detection, simulation trials including voltage sag, voltage swell and voltage interruption as well as the harmonics in different orders involving transient harmonics are done under Gauss white noise and color noise environments, the final results indicate that the proposed method is very effective