Seamless Mode Shifting Control of Utility Interactive Microgrid with Encoderless Wind Generator, Solar PV Array and Energy Storage

The grid integrated renewable based microgrid provides a feasible solution for rural electrification while promising continuous availability of the power. This work introduces a scheme of utility interactive microgrid so that in an absence of the grid or power failure, the control shifts from the current control mode to a standalone operating mode. These operating modes are enabled according to the signal provided to the static transfer switches (STS). The grid interconnection along with energy storage provided to the microgrid, offers significant benefits of curbing the renewable intermittency effecting the generation of the solar PV array and the wind turbine generator. The power quality (PQ) improvement along with energy surety and sufficiency are perceived by managing the local load support. The M-estimate adaptive filter is used to control the microgrid in the grid connected mode of operation, while the enhanced PR controller is utilized in the voltage control mode. The improved encoderless scheme adopted to estimate the speed and rotor position of the wind generator, reduces the cost consumed by the mechanical sensors. The co-operational behavior of the microgrid is obtained.