Development of Conductance Based Algorithm for Compensation in Highly Unbalanced and Distorted Grid

This paper presents a compensation scheme for improving the behavior of three phase three wire distribution system under fault conditions. Under unbalanced fault conditions and harmonics in the grid voltage, normal compensation algorithms fail to give desired results. Regulation of balanced and sinusoidal grid currents as several IEEE/IET standards and grid codes becomes a major challenge. This paper discusses the design of a new yet simple control technique of the grid connected converter realized for compensation. The designed algorithm consists of calculating of reference current under highly unbalanced and distorted supply condition. The experimental and simulation results are validated and discussed in this paper.