Abstract
Wind power generation is an increasing trend worldwide. Multilevel converters in this regard are playing an essential role in high power system applications due to various features. In this paper, multi-objective optimization based multilevel matrix converter (MOMMC) is proposed for wind energy conversion system. The assessment of feasibility through the discussion of two objectives: reliability and cost have been considered in this study. Initially, the model of the two objectives is assessed against redundancy configuration and power loss. Then a multi-objective function is defined for achieving low cost and high reliability. The optimal topology for the matrix multi-level converter is determined using the membership function, and the solution is selected from the Pareto-optimal set. The reliability and cost analysis of the proposed MOMMC is performed. Simulation is carried out for the proposed multi-objective optimization based multilevel matrix converter using the PSIM software. To establish the validity of the proposed method, two different cases: 1) fixed and 2) variable speed of 9 MW doubly-fed induction generator-based wind energy system are considered. The results show the superiority of the proposed method over the others .
Highlights
Among the widely used induction generator types, the doubly-fed induction generator (DFIG) has been proven to be the best for the variable speed wind energy conversion system
While the initial cost of the multi-level matrix converter (MLMC) is directly proportional to the power rating of the converter, the submodule cost, is inversely proportional to N
Multi-objective optimization model The main aim of topology optimization of MLMC is to achieve the lowest amount of cost and the highest amount of reliability
Summary
Among the widely used induction generator types, the doubly-fed induction generator (DFIG) has been proven to be the best for the variable speed wind energy conversion system. The reliability and cost of the various submodules should be computed and the optimal topology of the hybrid MMC for wind energy conversion has to be derived using a multi-objective model [13,14]. The reliability and cost analysis of the converters using multi-objective optimization takes the redundant submodules into consideration along with the determination of number of parallel modules is determined for the power system [26,27]. To surmount the cited problems, a multi-objective optimization-based multilevel matrix converter (MOMMC) is proposed for the wind energy conversion system. The proposed multi-objective technique, notably, is an appropriate choice for MMCs with other submodule configurations It is suitable for alternate arm converter topology because the component counts and adjusts the loss in power. Analysis of optimized multilevel matrix converter for DFIG...(Shubha Baravani et al)
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