A new harmonic power flow method based on the instantaneous power balance

In this paper an instantaneous power flow (IPF) solution method for analysing the harmonic power flow problem is proposed. The IPF uses the instantaneous power balance to formulate the problem. The methodology uses the harmonic domain as a frame-of-reference and the Newton-Raphson method. This method is fully formulated in the frequency domain and applicable to systems which also contain nonlinear elements and FACTS devices. The method also offers a flexible and modular formulation which shows excellent convergence properties. The IPF is developed, implemented and proved with simple examples for linear and nonlinear concentrated loads and the thyristor controlled reactor (TCR) in the control of reactive power.