Abstract
This paper presents the operation of battery energy storage system (BESS) with diesel generator (DG) set. The performance of the DG set is observed best when operated at full load or near full load (up to 70-80% load) condition. For this purpose a BESS is employed which ensures the load on the generator remains in between 80% to 100% of full load. Under light load condition (load less than 80%) the battery is being charged and in heavy load condition (load more than 100%) energy from battery is also utilized to feed extra power to the load. Along with load management, BESS provides the reactive power, harmonic and unbalanced load current compensation. The control of BESS is achieved using least mean square (LMS) based Adaline. The Adaline is used to extract the balance positive sequence real fundamental frequency component of load current. The switching of voltage source converter (VSC) working as BESS is achieved by forcing source currents to follow reference currents using hysteresis based PWM control. The scheme is simulated under MATLAB environment using SIMULINK and PSB block-sets. The modeling is performed for 3-phase 4-wire star connected synchronous generator, along with the 4-leg VSC working as BESS. The results verify the effectiveness of the Adaline based control of BESS to meet load compensation and optimal operation of DG set.
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