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Development and application of evaporation rate water cycle algorithm for optimal coordination of directional overcurrent relays

机译:蒸发速率水循环算法的发展与应用,以实现方向性转电继电器的最佳协调

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摘要

An optimization algorithm called modified evaporation rate water cycle algorithm (MERWCA) is proposed in this paper to find the optimal solutions for the coordination problem of directional overcurrent relays (DOCRs). The proposed MERWCA improves the performance of a conventional evaporation rate water cycle algorithm (ERWCA) by enhancing the balance between exploitation (search locally) and exploration (search globally) phases to find the best optimum solution. MERWCA includes the Opposition Based Learning (OBL) and Levy Flight (LF) component to address the shortcomings that the original ERWCA may exhibit, to avoid falling on the local optimal and improve the convergence rate. The proposed MERWCA is verified on the CEC'2017 test suite and its performance are compared with those of ten common metaheuristic algorithms (MAs). Both MERWCA and ERWCA are evaluated in the case of non-conventional and conventional relay curves. The feasibility of MERWCA technique is assessed using the conventional IEEE 39-bus meshed distribution test system. The results prove the viability of the MERWCA in solving DOCRs coordination problems in both cases (conventional and non-conventional characteristic relay curve) without any miscoordination between DOCRs pair. Moreover, the reduction ratio in minimizing the total operating using MERWCA reaches 46% with respect to the ERWCA and about 66% using the non-conventional relay characteristic. Finally, the MERWCA is assessed using benchmark DIgSILENT PowerFactory.
机译:本文提出了一种称为修改蒸发速率水循环算法(MERWCA)的优化算法,以找到定向过电流继电器(DOCRS)的协调问题的最佳解决方案。所提出的MerWCA通过增强剥削(本地搜索)和勘探(搜索全球)阶段之间的平衡来提高传统蒸发速率水循环算法(ERWCA)的性能,以找到最佳的最佳解决方案。 Merwca包括基于反对的学习(OBL)和Levy航班(LF)组成部分,以解决原始ERWCA可能展出的缺点,以避免落在当地最佳状态并提高收敛速度。拟议的MerWCA在CEC'2017测试套件上验证,其性能与十个常见的常规算法(MAS)进行了比较。在非传统和传统的继电器曲线的情况下,评估MerWCA和ERWCA。使用传统的IEEE 39母线网状分布测试系统评估MerWCA技术的可行性。结果证明了MerWCA在求解DOCRS协调问题(常规和非传统特征继电器曲线)中的可行性,而不是DOCRS对之间的任何误差。此外,使用非常规中继特性,使用MerWCA的使用MerWCA的总操作的总操作的减少比率达到46%。最后,使用基准DigSilent PowerFactory评估MerWCA。

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