Modeling and Design of High Performance Converters for Optimal Utilization of Interconnected Renewable Energy Resources
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ISSN:1598-6446 eISSN:2005-4092 http://www.springer.com/12555
Modeling and Design of High Performance Converters for Optimal Utilization of Interconnected Renewable Energy Resources to Micro Grid with GOLRS Controller Surendar Vadivel* and Uthandipalayam Subramaniyam Ragupathy Abstract: This paper proposes a bidirectional Z-source dc-dc converter topology for the optimal utilization of renewable energy sources to the microgrid with the proposed control technique. Compared to the existing dc-dc converter circuits, they can reduce in-rush and harmonic current, provide larger range of output dc voltage and improve reliability. It can operate in voltage-fed and current-fed when the place of the source and load is exchanged each other, and it can be perform buck-boost function in these two conditions. Its power flow can be bidirectional. The bidirectional Z-source dc-dc converter is revealed with the consideration of enhanced converter efficiency, effective utilization of renewable energy sources and reduced switching losses. The proposed control technique is the combination of both the grasshopper optimization algorithm (GOA) and local random search (LRS) and hence it is known as GOLRS controller. Here, the searching behaviour of the GOA is enhanced by LRS with the help of two operators named as crossover and mutation. In the proposed technique, the GOLRS is used to generate the optimal gain dataset based on the minimum error objective function and select the exact gain parameter of the PI controller. Batteries are used as an energy source to balance out and allow the renewable power system units to continue running at a steady and stable output power. The proposed technique is executed in the MATLAB/Simulink working platform and compared with various existing techniques. Keywords: Grasshopper optimization algorithm, high performance converters, interconnected renewable energy resources, local random search (LRS), micro grid.
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INTRODUCTION
In modern days, the renewable resources are less cost and also it is more efficient and pollution free resources. To satisfy the power necessity, wind and PV are the fundamental sources of energy [1]. To form a hybrid generation system PV, wind energy, wave energy, and tidal energy are the renewable energy sources (HGS). Power deficit occurs no propagation will occur by RESs due to the bad atmospheric conditions [2]. In a micro-grid environment to compensate disadvantages of individual resources and guarantee optimal power, control and regulation methods are essential and important. To accomplish the vitality between the source and loads with economic constraints, some authors will specify the ideal system estimate through a calculation [3]. However, using Power Electronic interface others attempted to develop strategic management system to manage the regular associations and power stream among the sources [4]. In productivity decrease the RES needs high voltage
boosting results [5]. To deal with this issue high voltage increase, high-efficiency dc-dc converter dependent on the
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