The Management of Electric Power Harmonic

The problem of electric power harmonic brought by nonlinear load in power grid has become more and more serious. The paper analyzes the main source and the causes of harmonics. The harm brought by electric power harmonic in electric equipment itself and power grid users are also be discussed. The paper demonstrates various measures to govern the harmonic in detail. The principle and structure of filter and harmonic compensation device are expounded in order to eliminate the damage in power gird caused by electric power harmonic.