Characteristic Analysis for Measured Electrical Signal of Representative Electrical Loads in Chinese Indoor Low Voltage Power Line Environment

Amount of methods has been employed to research the characters of the electrical signals in several fields of electrical power. Nevertheless, the selected methods are almost posteriori. In this paper, a framework is used to research three basic characteristics (nonlinearity, stationarity and determinacy) of electrical signals in order to provide a kind of priori basis. The basis could make the research method more effective. The electrical signals of three typical electrical appliance loads are collected to be three sets of time series in low voltage power line environment. The basic characters are researched by time series analysis methods. The analysis shows that the electrical signals are almost stationary and nonlinear, and there exists deterministic components in the signals.