International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 06 Issue: 05 | May 2019 www.irjet.net p-ISSN: 2395-0072 © 2019, IRJET | Impact Factor value: 7.211 | ISO 9001:2008 Certified Journal | Page 7148 VOLTAGE PROFILE AND LOSS REDUCTION ENHANCEMENT BY OPTIMAL PLACEMENT OF DG AND DSTATCOM IN DISTRIBUTION SYSTEM P. Kumarasundari 1 , Dr. Sujatha Balaraman 2 1 PG Scholar, Department of EEE, Government College of Technology, Coimbatore, India. 2 Associate Professor, Department of EEE, Government College of Technology, Coimbatore, India. ----------------------------------------------------------------------------***----------------------------------------------------------------------------- Abstract - Focus on power generation by non-conventional methods are increased as the result of rapid depletion of fossil fuels and increasing green environment concerns. Technological research advancement made the distributed energy resources (DER) to use as microgrids formations and active distribution network. This paper proposes a scheme for loss reduction and bus voltage profile improvement in the active radial distribution network. DER are form of small renewable energy resources is Distribution generation such as solar PV, wind, biomass, is located optimally for power loss reduction in the network. DLF method load flow is utilized and LSF with voltage deviation is used in finding the optimal placement of DG. DSTATCOM is optimally placed in the network to maintain bus voltages profile within the limit by providing reactive power support to the network with DG. The methodology is tested on simulation of IEEE 69-bus radial distribution system on MATLAB. Key Words: Distribution Generation, Direct Load Flow, DSTATCOM, Loss Sensitivity Factors. I. INTRODUCTION Now a days, distribution system acquires huge rate of power losses, i.e., 13% in the power system which has been studied. Improvement of the operating condition and voltage stability of the radial distribution system are also considered together for the studied with much importance. Many research works were been done to reduce the power losses and improve the voltage stability of the distribution system [1]. Integration of DGs in the RDS has considerably increased which was one of the optimal way to improve the distribution system performances. The optimal placement of DG are must on integration and if required DSTATCOM a special FACTS devices designed for distribution system to solve out the power quality issues and problems in voltage stability. Simultaneous allocation of DSTATCOM and DG in the RDS have more benefits such as reducing system power loss, voltage profile enhancement, power factor correction, load balancing, power quality improvement, on-peak operating costs reduction, shedding the overloading of distribution lines, system stability improvement, pollutant emission reduction, and increased overall energy efficiency. The feeder power flow is controlled by the regulated real and reactive power generation by the DG and DSTATCOM at optimal location in the RDS and it reduces the power import from the substation. Hence, the system total power loss has been decreased with good enhancement in voltage profile. The term “Distributed” or “Dispersed” Generation (DG) is described as small electric power generation that is directly linked to the systems. DG components are induction generators, micro turbines, synchronous generators, reciprocating engines, fuel cells, combustion gas turbines, solar photovoltaic, wind turbines and other small power generation sources. Comparing with constructing high priced new power plants and distribution and transmission lines DGs installation have less investment. The features that attract toward the DGs are ecofriendly, power quality improvement and economic. Traditional generating methods is less reliable energy solutions than DGs. Distribution STATic COMpensator (DSTATCOM) is a DFACTS device that enhances the distribution system efficiency and reliability by decreasing total lines losses with reactive power support and also increase voltage profile. In recent researches, this kind DFACTS are considered over existing shunt capacitor on the distribution system results in solving the defects on the capacitors and improves reactive power compensation. Advantages of DSTACOM over shunt capacitors are variable reactive power generation, load balancing, less resonance problems and in addition capacitor placement at right location and the cost involved in it due to constant reactive power generation is also eliminated. This article is organized as follows. Section 2. explains about DSTATCOM 3. System description 4. Proposed methodology 5. Simulation and results 6. Conclusion of proposed work.