Centralized normalization of harmonic voltages by the third-order passive filter

Abstract

The values of harmonic voltages at network

nodes should meet the standard limits. Harmonic voltages can

be decreased to admissible values on a centralized basis. The

paper addresses the problem of centralized decrease of

harmonic voltages in the high voltage networks with distributed

nonlinear loads using third-order passive filters. Mathematical

expressions to determine parameters of the third-order passive

filter are given. The parameters of the selected filters for 220

kV network supplying traction substations with power and also

the estimates of the efficiency of work of these filters for

different network configurations are presented as an example.

The efficiency of the C-type and third-order filters are

compared.