Optimal Placement of Distributed Generation to Enhance BusVoltage Qualitative Index

Abstract

The installation of distributed generation (DG) units in power distribution networks is becoming more prominent. The impact of DG units on the voltage qualitative index has become significant day by day. Optimization techniques are tools which can be used to locate the DG units in the system, so as to utilize these units optimally within certain limits and constraints. Thus, the impacts of DG unit's issues, such as voltage qualitative index and voltage profile, can be analyzed effectively. The ultimate goal of this paper is to propose a method of locating DG units so as to improve the voltage qualitative index. The load and renewable DG generation of only active power supply with probabilistic nature are considered in this study. The proposed method starts by selecting candidate buses into which to install the DG units on the system, prioritizing buses which are sensitive to voltage profile and thus improve the voltage qualitative index. The DG units' placement is formulated using nonlinear programming method with an objective function of improving the voltage qualitative index corresponding to then individual bus voltage enhancement where the constraints are the system voltage limits, current limits, systems load demand and the DG penetration level.

Multi-objective optimal placement of distributed generations for dynamic loads

“…min Fcost = a + bP + cP 2 + dP 3 Where a, b, c, d is the corresponding coefficient value for fixed and variable cost of the network.…”

“…Integration of DG at optimal location can indulgence in reducing energy losses, peak demand losses and enhancement of voltage profile, network stability and power factor of the whole network [3]. Thus, new DGs are needed to be connected in such a manner that it abstains degradation of power quality and reliability.…”