Optimal setting of voltage control equipment and analytical tools considering interconnection of distributed generators

This paper presents two optimal setting methods for transformers with line drop compensator and step voltage regulator, and analytical tools considering interconnection of distributed generators. The optimal setting problem can be formulated as a large combinatorial optimization problem, in which the setting values of voltage control equipment is utilized as state variables. The first and original method can generate optimal setting values of voltage control equipment in distribution systems. The second and improved method can generate optimal setting values in a few minutes even when several voltage control equipment should be considered. The feasibility of the proposed methods is demonstrated on practical distribution system models with promising results. Moreover, analytical tools considering interconnection of distributed generators have been developed. The functions of the tools include fast distribution power flow calculation and the optimal setting method presented in this paper.