Status and eliminating strategy for harmonic pollution in Lishui district;

Characteristics of harmonic pollution in medium and small hydraulic power stations and suppression methods;

According to the main fan transformation of Jinyuan Coal Mine,discusses main fan frequency-conversion,energy saving and advancement of online monitoring system,presents that capacitor filtering can eliminate harmonic pollution of temperature collection module constant current fountain chip causing by frequency-conversion.

Describes the cause for the harmonic contamination of electric power system and the damage of harmonic contamination to the equipment in the electric power system,and discusses in details the actions taken at home and abroad to prevent harmonic contamination and their effects.