This paper presents a new adaptive water cycle algorithm (AWCA) to optimize the controllers operation in a multiple distributed generators (DGs)-based microgrid. The inconsistent nature of renewable-based DG creates several challenges to stability margin of microgrid. The proposed AWCA improves the stability margin and transient profile of multi-DGs-based microgrid during various bounded/unbounded uncertainties. AWCA includes a sinusoidal chaotic map to handle all the nonlinearities produced in the microgrid. A multiple DG-based IEEE 9-bus microgrid system is considered to validate the performance of the proposed AWCA. Wind-generating system (WS) and photovoltaic (PV) with auxiliary battery energy storage are integrated to the microgrid as different DGs. A diesel engine generator with Pade approximation-based governor control is incorporated to provide uninterrupted microgrid operation. Here, second-order phase-locked loop-based feedback controllers are used for the grid synchronization of the DGs. The controller parameters of rotor-side converter and grid-side converter of WS are optimized to provide a better power regulation at the PCC. Similarly, the PV-VSC controller parameters are optimized by AWCA to improve the overall operation of the microgrid by minimizing the loss and improving stability. The performance of the proposed AWCA is verified under different DG-side as well as microgrid uncertainties. The efficacy of the proposed AWCA is presented in terms of power oscillation damping and improved stability limits. The assessments are evaluated in MATLAB script and dSPACE 1104-based hardware-in-loop platforms.

中文翻译：

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使用自适应水循环技术优化控制基于 PV-WS 电池的微电网

本文提出了一种新的自适应水循环算法 (AWCA)，以优化基于多分布式发电机 (DG) 的微电网中的控制器运行。基于可再生能源的 DG 的不一致性质给微电网的稳定性裕度带来了一些挑战。所提出的 AWCA 在各种有界/无界不确定性期间提高了基于多 DG 的微电网的稳定性裕度和瞬态曲线。AWCA 包括一个正弦混沌图来处理微电网中产生的所有非线性。一个基于多个 DG 的 IEEE 9 总线微电网系统被认为是验证所提出的 AWCA 的性能。风力发电系统 (WS) 和带有辅助电池储能的光伏 (PV) 作为不同的 DG 集成到微电网中。带有基于 Pade 近似的调速器控制的柴油发动机发电机被结合在一起，以提供不间断的微电网运行。在这里，基于二阶锁相环的反馈控制器用于 DG 的电网同步。WS的转子侧变流器和网侧变流器的控制器参数进行了优化，以在PCC提供更好的功率调节。同样，通过 AWCA 优化 PV-VSC 控制器参数，通过最小化损耗和提高稳定性来改善微电网的整体运行。所提出的 AWCA 的性能在不同的 DG 侧以及微电网不确定性下得到验证。提出的 AWCA 的功效是在功率振荡阻尼和改进的稳定性限制方面呈现的。