Investigation of Compensation Effect of Shunt Active Power Filter Working under the Non-Sinusoidal Voltage Conditions

The improvement of power quality is a frequently discussed issue, which still requires a considerable research effort to be devoted to study of the problem. The aim of this paper arises from the quality of compensation using a shunt active power filter working under non-sinusoidal conditions. Two different cases of network current shape under non-sinusoidal conditions have been compared The first one shows network current tracking curve of distorted voltage. And the second one shows the sinusoidal network current under non-sinusoidal voltage conditions. In the second case active power filter compensates also non-targeted non-linear loads connected to the network outside of PCC It results in more complicated control system of shunt active power filter and it can also overload the power circuit. Finally, it results in increased demands for active power filter design. Presented experimental results verify the theoretical backgrounds. Copyright (C) 2009 Praise Worthy Prize S.r.l. - All rights reserved.