Coordinated Control of Multiple Photovoltaic Static Compensator Systems to Improve Voltage Profile Dynamics Using Fuzzy Logic

The use of photovoltaic-static compensators (PV-STATCOM) to improve the system voltage profile has recently received much attention. This paper proposes coordinated control of multiple PV-STATCOM systems using fuzzy logic. The main feature of the proposed controller is that it can be operated in different modes: full-PV, partial-STATCOM and full-STATCOM in both capacitive and inductive compensation. In this strategy, when a disturbance occurs, depending on its severity, one or more PV-STATCOM systems go to the partial-STATCOM or full-STATCOM modes to optimize the reactive power compensation at the load bus. Then, after fixing the problem, the system returns to the full-PV power generation mode. To evaluate the system performance, different operating conditions were simulated with EMTDC/PSCAD software. The results confirm that the proposed fuzzy controller can improve the voltage profile dynamics.