UPQC compensation strategy and design aimed at reducing losses

After showing how the UPQC is able to-compensate for network voltage variations through different operating strategies, one such strategy is proposed whose aim is to limit the total losses of the device. An estimate was made of the extent of the losses of converters as a function of the DC section voltage and of the maximum injectable voltage from the injection transformer and, subsequently, with reference to a specific case, the optimal values for the design of the device are defined. A procedure is proposed, based on simulation of the behaviour of converters, in order to calculate the operating losses of inverters controlled in accordance with the two different PWM techniques used in controlling valves of the device in question.