Abstract
This paper deals with photovoltaic (PV) power plant modeling and its integration into the medium-voltage distribution network. Apart from solar cells, a simulation model includes a boost converter, voltage-oriented controller and LCL filter. The main emphasis is given to the comparison of two optimization methods—particle swarm optimization (PSO) and the Ziegler–Nichols (ZN) tuning method, approaches that are used for the parameters of Proportional-Integral (PI) controllers determination. A PI controller is commonly used because of its performance, but it is limited in its effectiveness if there is a change in the parameters of the system. In our case, the aforementioned change is caused by switching the feeders of the distribution network from an open-loop to a closed-loop arrangement. The simulation results have claimed the superiority of the PSO algorithm, while the classical ZN tuning method is acceptable in a limited area of operation.
Highlights
Due to increasing environmental awareness, legal regulations and international agreements that require an improvement of energy efficiency and a decrease of carbon emissions, there is a need to raise the share of renewable energy sources in the total energy balance of the community
The simulation results have claimed the superiority of the particle swarm optimization (PSO) algorithm, while the classical ZN tuning method is acceptable in a limited area of operation
Results of the agreement to the ideal responses are worse for the applied lower-tuning ZN procedure, while higher-tuning ZN procedures are mainly acceptable, but still lower in comparison to PSO results
Summary
Due to increasing environmental awareness, legal regulations and international agreements that require an improvement of energy efficiency and a decrease of carbon emissions, there is a need to raise the share of renewable energy sources in the total energy balance of the community. From a functional point of view, a PV system may face substantial deviations of its output power under changeable weather conditions They may be responsible for power fluctuations and voltage rises in the system, resulting in problems of grid control [8,9,10,11,12]. In a grid-connected system, a generated resonance peak is often related to the feeder’s arrangement, where the feeders in the open-loop arrangement are shifted to closed-loop to upgrade the reliability of the power supply [24,25,26,27,28,29]. Some earlier works have dealt with upgrading primary feeders from radial and open-loop to a normally closed-loop arrangement, but not in terms of a controlling structure. The procedures are performed for both the open-loop as well as closed-loop arrangement of feeders
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
