International Journal of Advanced Research in Electrical, Electronics and Instrumentation Engineering Vol. 1, Issue 2, August 2012
Optimal Placement of DG in Radial Distribution Network for Minimization of Losses Ram Singh1, Gursewak Singh Brar2 and Navdeep Kaur3
Assistant Professor, Deptt. of Electrical Engineering, Baba Hira Singh Bhattal Institute of Engg. & Technology, Lehragaga, Punjab, India. 2 Associate Professor, Deptt. of Electrical Engineering, Baba Banda Singh Bahadur Engineering College, Fategarh Sahib, Punjab, India. 3 Assistant Professor, Deptt. of Electrical Engineering, Baba Hira Singh Bhattal Institute of Engg. & Technology, Lehragaga, Punjab, India. firstname.lastname@example.org, email@example.com and firstname.lastname@example.org 1
Abstract: Recently, there has been great interest in the integration of distributed generation units at the distribution level. The foreseeable large use of DG in the future requires the distribution system engineers to properly take into account its impact in the system planning. When considering DG impact the attention should be paid in the siting and sizing of DG units. This paper proposes the use of analytical expressions for finding the optimal size and site of DG in distribution systems. Keywords: DG, sizing, siting, Exact Loss Formula, BIBC and BVBC. I. INTRODUCTION
Distributed generation unlike centralized electrical generation aims to generate electrical energy on small scale as near as possible to load centers, which provide an incremental capacity to power system. In the deregulated power market, concerns about the environment as well as economic issues have led increased interest in distributed generations. The emergence of new technological alternatives (photovoltaic systems, wind power, cogeneration, etc.) allows generating part of the required energy closer to the point of use, improving quality levels and minimizing the investments costs associated with of transmission and distribution systems. With electricity market undergoing tremendous transformation, more price instability in the market, ageing infrastructure and changing regulatory environments are demanding users and electric utilities to exploit benefits of DG [1, 2]. DGs are expected to play key role in future markets because of their economic feasibility and based on the study of Electric Power Research Institute (EPRI) and Natural Gas Foundation, 30% of power generation share will be of DG [3,4]. The decreasing availability of natural resources and the increasing consciousness of environmental protection have rapidly increased the share of DG in the electricity supply. Many definitions of DG have appeared in the literature based on their size, technologies, location, power delivery area and operational constraints with their economical and operational benefits [5–7]. Distributed generation (DG) represents a change in the standard of electrical energy generation. The penetration of DG in the distribution system changes the power flow in the traditional network of electric power distribution system from unidirectional to multidirectional system. With increased use of distributed generations in distribution network has changed the nature of network from passive to active. One of the main obstacles for high DG penetration in the distribution feeder is the voltage rise effect which can be rectified by the selection of appropriate size and number of DGs . Distribution system performance can be improved with the effective integration of DG. Under such circumstances, the DG offers a feasible alternative to traditional sources of the electric power. The foreseeable large use of DG in the future requires the distribution system engineers to properly take into account its impact in the system planning. When considering DG impact the attention should be paid in the siting and sizing of DG units. The operation of DG can provide benefits to distribution networks such as reduction of power...