A Novel Adaptive Frequency Control Strategy for Micro Grid

Modern strategy like use of Electronic Load Controller (ELC) to improve the system frequency is an attractive solution. However such an approach leads to decrease in efficiency of the system as part of the generated power during light load condition is dumped in resistive loads. Several approaches which are developed to improve the performance of the ELCs still have a void where they achieved a solution with a compromise of reduced efficiency. In this work, we have proposed a central control strategy to control the frequency without reducing the efficiency, where ELC and pump loads are connected in parallel. The pump load and ELC are controlled by observing the rate of change of frequency. When the ratio is positive, loads will on and the frequency will be maintained. The proposed method is tested for IEEE 7 bus system using MATLAB/SIMULINK and test results show that the scheme is able to maintain the frequency without losing the extra power.