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Real Time Simulation for Load Frequency Control of Multisource Microgrid System Using Grey Wolf Optimization Based Modified Bias Coefficient Diagram Method (GWO-MBCDM) Controller

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Abstract

This paper proposes a modified bias (MB) and coefficient diagram method (CDM) based PID controller as a first attempt in controlling frequency of a self-reliant microgrid (MG) system under extreme unfavourable scenarios. Recently developed meta-heuristic algorithm, Grey Wolf Optimizer (GWO), is used for optimizing the parameters of the proposed controller GWO). Frequency deviation arises in the system due to active power mismatch between load power demand and actual power generation. In order to overcome this problem the CDM based gain values and frequency biased parameters of the MG system are used for determining the ranges of the control parameters for optimization with GWO which ensures that the search points generated by the search algorithm are stable ones. Simulation of the proposed GWO optimized MB-CDM controller-based MG system has been successfully implemented in real time simulation platform using digital simulator OPAL-RT. The performance of the system is obtained using proposed controller under different real-life scenarios and results are minutely analysed. The results are further compared with other relevant recent controllers including particle swarm optimization (PSO) MB-CDM controller to demonstrate that the proposed controller is superior to all other controllers. In addition, sensitivity analysis of the proposed controller for the MG system is studied under varying system parameters. The Simulink results illustrate that the proposed controller gives the best dynamic response amongst all other considered controllers in terms of peak transient deviation and settling time.

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Acknowledgements

We take this opportunity to offer our wholehearted gratitude to TEQIP-III project for making available OPAL-RT Loop Simulator at NIT Manipur which assisted us to validate all responses of the proposed controller based MG system in real time environment.

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Authors and Affiliations

  1. Department of Electrical Engineering, National Institute of Technology, Manipur, Imphal, India

    Badal Kumar & Shuma Adhikari

  2. Department of Electrical Engineering, Mizoram University, Aizawl, Mizoram, India

    Subir Datta

  3. Department of Electrical Engineering, National Institute of Technology, Silchar, India

    Nidul Sinha

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  1. Badal Kumar
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  2. Shuma Adhikari
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  3. Subir Datta
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  4. Nidul Sinha
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Correspondence to Subir Datta.

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Appendix

Appendix

Nominal parameters of the MG:

fsys = 50 Hz, Pbase = 1MVA, D = 0.012 MW/Hz, M = 0.2 s, Tdegg = 2 s, Tdegt=20 s, Tfc = 4 s, Tae = 0.2 s, \(T_{bess}\) = 0.1 s, Tfess = 0.1, Kdegg = Kdegt = Kae = Kbess = Kfess = 1, TWT = 1.5 s, TPV = 1.8 s, KWT = KPV = 1.

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Kumar, B., Adhikari, S., Datta, S. et al. Real Time Simulation for Load Frequency Control of Multisource Microgrid System Using Grey Wolf Optimization Based Modified Bias Coefficient Diagram Method (GWO-MBCDM) Controller. J. Electr. Eng. Technol. 16, 205–221 (2021). https://doi.org/10.1007/s42835-020-00596-2

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