This paper presents differential evolution with Gaussian mutation to solve the complex non-smooth nonconvex combined heat and power economic dispatch (CHPED) problem. Valve-point loading and prohibited operating zones of conventional thermal generators are taken into account. Differential evolution (DE) is a simple yet powerful global optimization technique. It exploits the differences of randomly sampled pairs of objective vectors for its mutation process. This mutation process is not suitable for complex multimodal optimization. This paper proposes Gaussian mutation in DE which improves search efficiency and guarantees a high probability of obtaining the global optimum without significantly impairing the simplicity of the structure of DE. The effectiveness of the proposed method has been verified on five test problems and three test systems. The results of the proposed approach are compared with those obtained by other evolutionary methods. It is found that the proposed differential evolution with Gaussian mutation-based approach is able to provide better solution.
Summary
This article presents a novel 11‐level switched capacitor multilevel inverter (SCMLI) structure first. After that, the cascaded configuration of the proposed structure is developed. The structure has the inherent output voltage boosting as well as self‐capacitor voltage balancing ability. The voltage boosting feature of the proposed structure mitigates the requirement of heavy magnetic components such as transformers or inductors in the structure, which significantly reduces the weight, cost, and complexity of the conversion system. The operating principle, selection procedure of switched capacitors, and power losses analysis of the proposed 11‐level structure are presented in detail. The proposed structure utilizes a smaller number of components as compared to similar structures for realizing the same number of output voltage levels. Further, the structure provides a lower total standing voltage per boosting factor as compared to other structures. An experimental investigation on a 11‐level laboratory prototype is conducted and the effectiveness of the proposed structure verified.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.