Due to the detection and management of electricity also has some problems, such as single function, poor real-time performance and the lack of statistical analysis, the efficiency is not high, therefore, a method of detection and management are needed to improve the problems faced by electric power system at present stage.

1 the development of the electric power harmonic detectionIn power system, the most ideal current and voltage waveform is under power frequency sine wave, but in practice often exist different distortion, especially in the distribution of frequency control of motor speed in recent years, the continuous application of inverter, electronic equipment, etc, lead to nonlinear load increase, the power system of electric current and voltage waveform distortion seriously, cause in a large number of grid harmonic, cause a lot of power of the incident occurred. So, the harmonic pollution in the present is acknowledged as the impact power grid