FLC-Based SOGI Controller for Photovoltaic-Operated STATCOM for Current Harmonic Elimination

摘要

In this paper, a photovoltaic (PV)-array-interfaced static synchronous compensator (STATCOM) with a fuzzy-logic-controller (FLC)-based second-order generalized integrator (SOGI) is presented to compensate for the current harmonics in the three-phase four-wire distribution system. The compensation ability and the effectiveness of the compensation depend on the capability of the dc link and the control techniques employed. The control techniques used in the system decides the required quantity of the measurement devices and the cost of the control unit. The proposed SOGI controller uses only the currents measured at the converter and load terminals. It does not require any voltage sensor. The proposed topology of STATCOM uses the energy generated in the PV array and FLC-based SOGI to offer the sufficient energy and provide the sustainable compensation against the current disturbances. The simulation results and experimental results of the prototype model are presented to validate the performance of the proposed STATCOM in compensating the current harmonics.