{"title":"Improving the Shunt Active Power Filter Performance Using Synchronous Reference Frame PI Based Controller with Anti-Windup Scheme","authors":"Consalva J. Msigwa, Beda J. Kundy, Bakari M. M. Mwinyiwiwa","country":null,"institution":"","volume":33,"journal":"International Journal of Electrical and Computer Engineering","pagesStart":1689,"pagesEnd":1695,"ISSN":"1307-6892","URL":"https:\/\/publications.waset.org\/pdf\/3605","abstract":"In this paper the reference current for Voltage Source\r\nConverter (VSC) of the Shunt Active Power Filter (SAPF) is\r\ngenerated using Synchronous Reference Frame method,\r\nincorporating the PI controller with anti-windup scheme. The\r\nproposed method improves the harmonic filtering by compensating\r\nthe winding up phenomenon caused by the integral term of the PI\r\ncontroller.\r\nUsing Reference Frame Transformation, the current is transformed\r\nfrom om a - b - c stationery frame to rotating 0 - d - q frame. Using\r\nthe PI controller, the current in the 0 - d - q frame is controlled to\r\nget the desired reference signal. A controller with integral action\r\ncombined with an actuator that becomes saturated can give some\r\nundesirable effects. If the control error is so large that the integrator\r\nsaturates the actuator, the feedback path becomes ineffective because\r\nthe actuator will remain saturated even if the process output changes.\r\nThe integrator being an unstable system may then integrate to a very\r\nlarge value, the phenomenon known as integrator windup.\r\nImplementing the integrator anti-windup circuit turns off the\r\nintegrator action when the actuator saturates, hence improving the\r\nperformance of the SAPF and dynamically compensating harmonics\r\nin the power network. In this paper the system performance is\r\nexamined with Shunt Active Power Filter simulation model.","references":null,"publisher":"World Academy of Science, Engineering and Technology","index":"Open Science Index 33, 2009"}