Integration of DERs for Optimal Sharing of Power in Grid Connected Mode as Well as Islanded Mode


  • L Bangar Raju
  • K Subba Rao





DOE-department of energy, US-united states, EU – Europe, LV-low voltage, DERs-distributed energy resources, DG-distributed generation, , DSs-distributed storage systems, PV-photo voltaic, PSO – particle swarm optimization, GA – genetic algorithm, ESS – ene


The Microgrid consists of distributed energy resources, DERs(distributed generators - DGs) and distributed storages - DSs), loads, PCC, energy management controllers etc., which are required for effective, efficient, reliable and seamless operation of microgrid in both grid connected mode and islanded mode. The heart of the microgrid is the integration part of the DERs with energy management controllers. Out of the methods available, hierarchical method of integrating DERs is selected in this paper. The method is based on the principle of hybrid particle swarm optimization (PSO) which takes into account of genetic algorithm (GA) and PSO. In this paper, the best part of particle to particle information sharing in GA is combined with fast convergence option in PSO, to get the optimum solution with minimum no of iterations. Integration of DERs is nothing but energy management in supply side management (SSM) as well as demand side management (DSM). DSM consists of load shedding or load shifting to an alternate feeder. The primary energy controller MC (microsource controller) controls voltage and frequency through droop control inverters. The secondary controller (MGCC) monitors the flow of active and reactive power in the microgrid and communicates to the DMS (distribution management system). The tertiary controller, DMS takes care of overall control of the network like export, import, islanding, economical aspects of the DERs operation in the microgrid. The energy management module (MGCC) must also contain protection co-ordination module (PCM) along with energy management module (EMM), for relay co-ordination as microgrid consists of two operating modes viz., grid connected mode and islanded mode. The fault currents substantially reduces to smaller values in islanded mode as DERs inertias are low. For this reason the PCM must have two settings and auto changeover of settings are required from one mode to another by PCM module to suit islanding and grid modes.





[1] S. Chowdhury, S.P. Chowdhury and P. Crossley,â€Microgrids and ActiveDistribution Networksâ€, The Institution of Engineering and Technology, London, United Kingdom, IET Renewable Energy Series 6, published in the year 2009, available online:

[2] Ms.JyothiB.Fulzele, Dr. M.B.Daigavane,â€Design Optimization of Hybrid PV-Wind Renewable Energy Systemsâ€, International Conference on Processing of Materials, Minerals and Energy (July 9th – 30th) 2016, Ongole, Andhra Pradeh, India.., www.m /proceedings

[3] K. Lenin, B. Ravindranath Reddy, and M. Surya Kalavathi, “Journal of Industrial and Intelligent Information Vol. 2, No. 3, September 2014.

[4] [12] Anita Gudelj, MajaKrcum, Simulation and optimization of independent renewable energy hybrid system, TOMS transactions on maritimescience, pp. 28-35, 2013.

[5] [13] M. S. Ismail, M. Moghavvemi, T.M.I. Mahlia, Genetic algorithm based optimization on modeling and design of hybrid renewable energysystems, Energy conversion and mangement 85, pp. 120 – 130, 2014.

[6] [14] Corsiuc Georgiana, Marza Carmen, C. Emilian, Hybrid solar-wind stand alone energy system: a case study, applied mechanics and materals,vol 772, pp. 536-540, 2015.

[7] Document by Ning Kang, Jianhui Wang, Ravindra Singh, and Xiaonan Lu, Center for Energy, Environmental, and Economic Systems AnalysisArgonne National Laboratories, “Interconnection, Integration, and Interactive Impact, Energy Systems Division in January 2017

[8] TomislavDragicevic, Dan Wu, QobadShafiee, and LexuanMeng, “Distributed and Decentralized Control Architectures for Converter-Interfaced Microgridsâ€, in Chinese Journal of Electrical Engineering, Vol.3, No.2, September 2017

[9] Xianyong Feng, Aditya Shekhar, Fang Yang, Robert E. Hebner&Pavol Bauer, “Comparison of Hierarchical Control and Distributed Control for Microgrid, in Electric Power Components and Systems, Talor and Francis group.

[10] Sandeep KakranâŽ, SaurabhChanana, “Smart operations of smart grids integrated with distributed generation “,Renewable and Sustainable Energy Reviews, Elsevier, in Dec 2018.

[11] Deloitti Centre for Energy Solutions, “Managing variable and distributed energy resources, Executive summary 2015.

[12] Rumi Rajbongshi, DevashreeBorgohain, SadhanMahapatra, “Optimization of PV-biomass-diesel and grid hybrid energy, for rural electrification by using HOMERâ€, Elsevier , Mar 2017.

[13] Hao Jan Liu, Matthew Backes, Richard Macwan, and Alfonso Valdes, “Coordination of DERs in Microgrids with Cybersecure ResilientDecentralized Secondary Frequency Control “, in Proceedings of the 51st Hawaii International Conference on System sciences 2018.

[14] Cesar Hernandez, VíctorGóme, Edwin Rivas,, Universidad Distrital Francisco José de Caldas, Bogotá-Colombia, “Distributed Energetic Resources: Trends, Control and Operation,â€, IJET, Nov 20147

[15] Soshinskaya, Mariya; Graus, Wina; Guerrero, Josep M.; Quintero, Juan Carlos Vasquez, “Microgrids: experiences, barriers and success factorsâ€, in Renewable and Sustainable Energy Reviews, 2014 – Elsevier.

[16] Wenbo Shi, Eun-Kyu Lee, Daoyuan Yao, Rui Huang, Chi-Cheng Chu, and RajitGadh, Smart Grid Energy Research Center, University of California, Los Angeles, USA, “Evaluating Microgrid Management and Control with an Implementable Energy Management System, to appear in IEEE Smart Grid Communications, Venice, Italy, 3-6 Nov. 2014.

[17] Borna&Khezri, Cogent Mathematics (2015), 2: 1048581, Computational Science | Research Article “A combination of genetic algorithm and particle swarm optimization method for solving traveling salesman problemâ€.

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How to Cite

Bangar Raju, L., & Subba Rao, K. (2018). Integration of DERs for Optimal Sharing of Power in Grid Connected Mode as Well as Islanded Mode. International Journal of Engineering & Technology, 7(3.12), 1118–1124.
Received 2018-08-18
Accepted 2018-08-18
Published 2018-07-20