Abstract:In this paper, an optimuum choice method of parameters in electric power filters is proposed. The parameters determined are rated voltage in their capacitors, size of capacitors and optimal coordination in a group of single-mued electric power filters. The parameters also comprise their optimal partial resonance ratio and resistance making electric power filters have optimal filter efficiency. The method proposed in the paper is accorded with their technical indexes and safety constraints. The technical indexes are harmonic voltage, harmonic current and fundamental reactive power output. Overvoltage, overcurrent and balance of size in their capacitors are safety constraints. Cut-off frequency, quality factor, size and rated voltage in second high pass band filters also can be solved via the method proposed in the paper. The choice of all of the above parameters has been programmed and can be compared in the software. The software block and a sample example are listed in the paper.