Multi Renewable source system stabilization using ANFIS controller for energy storage module

Abstract

When a system is operated with multiple renewable sources connected to the same bus, several power quality issues are raised which may damage the devices connected to it. The issues like DC voltage regulation, harmonics in the AC voltages and ripple in the currents of the devices might be a major concern in the system. This compromising power quality can be improved by integrating advanced adaptive controller into the system for stable voltages. For this a multi renewable source system is considered including PMSG wind farm, FC module, PV source and a battery unit energy storage module. The battery unit is a mandatory module which maintains the power exchange and DC link voltage stability. The fuel cell module is a backup unit to the system when the battery unit fails. In normal operating conditions the battery unit has the majority control over the system. Therefore, the controller of the battery unit is updated with an ANFIS control structure improving the DC link voltage stabilization, helps to mitigate harmonics on the AC side. A relative analysis is done with traditional PI controller and proposed ANFIS controller generating comparative parameters and graphs using MATLAB software Simulink tools. The stability of the system is validated by operating it in different conditions, testing the ability of the proposed controller.