Optimized Controller Design Using an Adaptive Bacterial Foraging Algorithm for Voltage Control and Reactive Power Management in Off-Grid Hybrid Power System

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Harsha Anantwar 1,* B.R. Lakshmikantha 2 Shanmukha Sundar 1

1. Dayananda Sagar College of Engineering, Bangalore, India

2. Dayananda Sagar Academyn of Technology and Management, Bangalore, India

* Corresponding author.

DOI: https://doi.org/10.5815/ijigsp.2019.01.04

Received: 26 Jun. 2018 / Revised: 18 Jul. 2018 / Accepted: 17 Sep. 2018 / Published: 8 Jan. 2019

Index Terms

Bacterial foraging Algorithm, voltage regulation, Off-grid hybrid power system


This paper investigates the application of adaptive Bacteria Forging Algorithm (BFA) to design optimal controllers for voltage stability of off-grid hybrid power system (OGHPS).Voltage fluctuations will have great impact on the quality of power supply. Voltage rise/drop depends on the surplus / shortage of reactive power in the system, hence it has become extremely important to manage the reactive power balance for voltage control in the off-grid hybrid power system. The off -grid hybrid power system considered in this work as a test system, consist of an Induction generator (IG) for wind power systems, Photo-Voltaic (PV) system with inverter, Synchronous generator (SG) for diesel  power generation and composite load. The Over-rated PV inverter has ample amount of reactive power capacity while sourcing PV real power. Two control structures are incorporated, to regulate system voltage. The first  control structure is for the reactive power compensation  of the system by inverter, by controlling the magnitude of inverter output voltage and the second control structure is for  controlling the SG excitation by an automatic voltage regulator (AVR) and hence the load voltage. Both control structures have proportional-integral (PI) controller. Both control loops are coordinated by tuning their parameters optimally and simultaneously using an adaptive Bacterial forging optimization algorithm. Small signal model of all components of OGHPS is simulated in SIMULINK, tested for reactive load disturbance and /or wind power input disturbance of different magnitudes to investigate voltage stability. 

Cite This Paper

Harsha Anantwar, B.R. Lakshmikantha, Shanmukha Sundar, "Optimized Controller Design Using an Adaptive Bacterial Foraging Algorithm for Voltage Control and Reactive Power Management in Off-Grid Hybrid Power System", International Journal of Image, Graphics and Signal Processing(IJIGSP), Vol.11, No.1, pp. 33-43, 2019. DOI: 10.5815/ijigsp.2019.01.04


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