Grid power quality improvement and battery energy storage in wind energy systems

The sources such as wind and solar are expected to be promising energy sources when it is connected to the power grid. The power from above energy sources varies due to environmental conditions. Due to the fluctuation nature of the wind power injection into an electric grid affects the power quality. The influence of the wind sources in the grid system concerns the power quality such as the active power, reactive power, and variation of voltage, harmonics, and electrical behavior in switching operation. The power quality problems when wind turbine installed to grid side is demonstrated here. A Static Compensator (STATCOM) is connected at a point of common coupling with a battery energy storage system (BESS) to rectify the power quality problems. The battery energy storage used to maintain constant real power from varying wind power. The generated power can be stored in the batteries at low power demand hours. The combination of battery storage with wind energy generation system will synthesize the output waveform by absorbing or injecting reactive power and enable the real power flow required by the load. The amount of energy consumed or given to the grid can be view through an online smart meter connected in the circuit. Using the online smart meter the utility can view the energy consumption of each system simultaneously. So the utility can coordinate all the system effectively.