Three-phase optimal harmonic power flow

A new three-phase optimal-harmonic-power-flow (TOHPF) method is proposed. It is designed to minimise the three-phase power losses and the total three-phase harmonic voltage distortion while satisfying the three-phase-power-flow equations, three-phase harmonic-power-flow equations, three-phase security constraints, and the three-phase harmonic standard etc. A two-level algorithm is used to solve the problem: the master level determines the settings of three-phase compensators and taps; the slave level includes subproblems which involve cases of fundamental and harmonic frequencies separately. The test results for two power systems show the applicability of the proposed method.