Optimal Siting and Sizing of Locally-controlled Shunt Active Power Filters in Electric Power Distribution Networks

Installation of active power filters (APFs) is one of the most efficient ways to reduce harmonic pollution in distribution networks. In previous researches, APFs are considered with integrated control system and local control system of APFs is one of the items that has been ignored in optimal allocation of these devices. Integrated central control systems need powerful hardware and software infrastructures and since there is no such infrastructure in Iran distribution networks, such methods would be usefulness for optimal allocation of APFs. In this paper allocation of locally controlled APFs has been studied. Local control system of APFs make the current of upstream branch from their connection point sinusoidal by sensing the current passing through the connection point and injecting equal but opposite current to that point. Genetic algorithm has been used as the optimization tool and finally, the numerical results are discussed in two, 9-bus and 33-bus test systems.