Control of wind-diesel microgrid using affine projection-like algorithm

Abstract

This paper deals with brushless generators-based isolated wind-diesel microgrid for rural areas. Here, a permanent magnet brushless dc generator (PMBLDCG) is used to convert renewable wind power into electrical energy. A diesel engine-driven generator based on the squirrel-cage induction generator (SCIG) and a battery storage system (BSS) with a voltage source converter (VSC) deliver power to feed necessary loads. BSS provides load leveling during load variations and wind fluctuations. For such microgrid, control schemes must be accurate and robust to overcome any discrepancy, and able to provide voltage and frequency regulation to the microgrid. Here, voltage and frequency control at the point of common coupling (PCC) is achieved with affine projection-like (APL) algorithm by proper switching of a VSC. This control algorithm is also able to provide reactive power compensation, load balancing, and harmonics suppression, and therefore provides sinusoidal voltage supply. Performance of the algorithm is demonstrated with wide range of test results of developed prototype of proposed microgrid.