Multi-objective optimization of SVR considering optimum placement and weather conditions in distribution systems

This paper proposes the application of multi-objective optimization to step voltage regulators in a distribution system. Conventional electrical power systems do not consider reverse power flow, in which the power flows toward the feeder in the distribution system. When large quantities of distributed generators (DGs) are introduced into a distribution system they can cause voltage deviations beyond the statutory range, resulting in reverse flow toward the substation transformer. Consequently, this causes faults in electric devices and may even lead to a massive blackout. This is an important issue within the distribution system. In order to resolve voltage deviation problems it is necessary to consider some trade-offs. However, it is difficult to consider these trade-offs using single objective-optimization. Furthermore, there is not much published research adapting multi-objective optimization for use in the distribution system. Therefore, this paper provides a method of multi-objective optimization to minimize voltage deviation while simultaneously minimizing the number of introduced voltage control devices and finding an optimum placement of those voltage control devices. Moreover, an optimum scheduling of the distribution system is adopted.