Abstract: The high voltage power supply device of EP plays a significant role in adaptation of EP to operation condition and raising global function of EP. The features and functions of several domestic high voltage power sources were analyzed. A new high voltage power source control device of EP developed at home was introduced in detail. This device has advantages of effectively eliminating the damage of discorona, increasing the dust removal efficiency and lowering electrical energy consumption at large amplitude. It is pointed in the end of this paper that the high voltage power supply mode of spark automatic following, which has been used in our country widely for many years, is of great power and high energy consumption, and it should be replaced by efficiency-enhancing, energy-saving high voltage power supply mode, which has higher peak voltage, lower average voltage and smaller current, as soon as possible.

Key words: electric precipitator（EP）, high voltage power source, discorona, efficiency-enhancing and energy-saving, impulse-type power supply, dust removal efficiency