Optimal Capacitors in Radial Distribution System for Loss Reduction and Voltage Enhancement

Abstract

The work presented in this paper is carried out with the objective of identifying the optimal location and size (Kvar ratings) of shunt capacitors to be placed in radial distribution system, to have overall economy considering the saving due to energy loss minimization. To achieve this objective, a two stage methodology is adopted in this paper. In the first stage, the base case load flow of uncompensated distribution system is carried out. On the basis of base case load flow solution, Nominal voltage magnitudes and Loss Sensitivity Factors are calculated and the weak buses are selected for capacitor placement.In the second stage, Particle Swarm Optimization (PSO) algorithm is used to identify the size of the capacitors to be placed at the selected buses for minimizing the power loss. The developed algorithm is tested for 10-bus, 34-bus and 85-bus Radial Distribution Systems. The results show that there has been an enhancement in voltage profile and reduction in power loss thus resulting in much annual saving.

Comprehensive Review of Radial Distribution Test Systems for Power System Distribution Education and Research

“…We hope that this paper will help researchers, academics, and students in distribution system related research work. [36] 2011 Optimal Var planning [37] 2013 Optimal siting and sizing (OSS) of shunt capacitors [38] 2013 OSS of DG and capacitor [39] 2013 Analysis of RDS optimization with FACTS devices [40] 2013 Capacitor placement [41] 2013 Optimal capacitors sizing [42] 2014 OSS of capacitors [43] 2014 Optimal allocation of capacitors [44] 2015 Power factor and energy loss cost evaluation [45] 2016 Optimal capacitor placement and sizing [46] 2016 Optimal sizing of capacitors [47] 2016 OSS of shunt capacitors 12-bus RDS [48] 2006 Load flow [49] 2009 OSS of DG [50] 2012 OSS of DG [51] 2013 Placement of wind and solar based DGs [52] 2013 Optimal allocation of combined DG and capacitor [53] 2014 OSS of DG and DSTATCOM [44] 2015 Power factor and energy loss cost evaluation [54] 2017 Optimal allocation of DG and DSTATCOM 15-bus RDS [51] 2013 Placement of wind and solar based DGs [42] 2014 OSS of capacitors [55] 2015 OSS of capacitors 16-bus RDS [56] 2010 Optimal DG allocation [57] 2013 Optimal DG allocation [58] 2013 Optimal DG allocation and network reconfiguration [59] 2014 [64] 2011 Dynamic network reconfiguration [65] 2012 OSS of DG [60] 2013 OSS of DG [66] 2013 Network reconfiguration [38] 2013 OSS of DG and capacitors [52] 2013 OSS of DG and capacitors [67] 2013 Optimal DG allocation [51] 2013 Placement of wind and solar based DGs [58] 2013 Op...…”

Comprehensive Review of Radial Distribution Test Systems

“…It is worth to mention that even though a large list of references is given in Table 24 it is not exhaustive and some other references can be found in the literature. (Rao and Narasimham 2008) 2008 Optimal capacitor placement (Hamouda and Zehar 2011) 2011 Optimal Var planning (Khan et al 2013) 2013 Optimal siting and sizing of shunt capacitors (Baghipourr and Hosseini 2013) 2013 Optimal siting and sizing of DG and capacitor (S. Vijayabaskar and T. Manigandan 2013) 2013 Analysis of RDS optimization with FACTS devices (Muthukumar and Thanushkodi 2013) 2013 Capacitor placement (Hamouda and Sayah 2013) 2013 Optimal capacitors sizing (Elsheikh et al 2014) 2014 Optimal siting and sizing of capacitors (Nojavan et al 2014) 2014 Optimal allocation of capacitors (Peddanna 2015) 2015 Power factor and energy loss cost evaluation (Abdelaziz et al 2016) 2016 Optimal capacitor placement and sizing (Murthy and Bhimaraju 2016) 2016 Optimal sizing of capacitors (Bhongade and Arya 2016) 2016 Optimal siting and sizing of shunt capacitors 12-bus RDS (Hamouda and Zehar 2006) 2006 Load flow (Gözel and Hocaoglu 2009) 2009 Optimal siting and sizing of DG (Aman et al 2012) 2012 Optimal siting and sizing of DG (Kayal and Chanda 2013) 2013 Placement of wind and solar based DGs (Gopiya Naik et al 2013) 2013 Optimal allocation of combined DG and capacitor (Devi and Geethanjali 2014) 2014 Optimal siting and sizing of DG and DSTATCOM (Peddanna 2015) 2015 Power factor and energy loss cost evaluation (Yuvaraj et al 2017) 2017 Optimal allocation of DG and DSTATCOM 15-bus RDS (Kayal and Chanda 2013) 2013 Placement of wind and solar based DGs (Elsheikh et al 2014) 2014 Optimal siting and sizing of capacitors (Abdelaziz et al 2015) 2015 Optimal siting and sizing of capacitors 16-bus RDS (Hung et al 2010) 2010 Optimal DG allocation (Hung and Mithulananthan 2013) 2013 Optimal DG allocation (Rosseti et al 2013) 2013 Optimal DG allocation and network reconfiguration (Lee et al 2014) 20...…”

Hybrid Design of Optimal Capacitor Placement and Reconfiguration for Performance Improvement in a Radial Distribution System

“…is compensation increases the overall stability and power factor; therefore an optimum value and place of capacitors are necessary to realize these objectives, taking into account a lower overall cost [21]. is technique contains the locations and calculation of the magnitude and number of capacitors that required to be installed in the system.…”

“…Some research studies adopted LSI to find the candidate locations for the capacitor while the PSO algorithm was used to find the optimal capacitor size with the objective of loss reduction and voltage improvement for 10-, 34-, and 85-bus RDSs. e load flow that is used in this study is Newton-Raphson Method (NRM), and only the fixed-type capacitors are taken into consideration [21]. Finally, a hybrid algorithm of fuzzy expert system and Genetic Algorithm are used to determine location and size of shunt capacitors in distorted RDSs, considering effect of harmonic distortion.…”