The nonlinearity in the consumption does not maintain steady voltage or frequency; therefore, in this article, a circular limited cycle oscillator frequency locked loop with prefilter (CLO-FLL-WPF) based control for voltage source converter control is used to achieve voltage and frequency regulation in an islanded microgrid (MG). This control is implemented to compensate local load reactive power, harmonic currents, and load unbalance. Besides, the active power of local loads is shared among the multiple energy sources. The CLO-FLL-WPF control technique performance is validated experimentally and through simulations by comparing it with the existing control algorithm in a MG. This MG is a combination of the solar photovoltaic array, pico-hydro turbine-driven synchronous reluctance generator, permanent magnet brushless dc generator based wind energy conversion, and battery storage. In traditional battery control, a proportional-integral control approach is used, which can cause a stability problem. Thereby, in this article, the bidirectional dc_dc converter control method is used, which provides improved stability and makes the controller design straightforward. Test results validate the effectiveness of the control algorithm under different dynamic and steady-state conditions.

中文翻译：

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SyRG-PV 和风基孤岛微电网的鲁棒控制策略


功耗的非线性无法维持稳定的电压或频率；因此，在本文中，采用基于带预滤波器的循环有限周期振荡器锁频环（CLO-FLL-WPF）的电压源变流器控制来实现孤岛微电网（MG）中的电压和频率调节。该控制用于补偿本地负载无功功率、谐波电流和负载不平衡。此外，本地负载的有功功率由多个能源共享。通过与 MG 中现有的控制算法进行比较，通过实验和仿真验证了 CLO-FLL-WPF 控制技术的性能。该MG是太阳能光伏阵列、微型水轮机驱动的同步磁阻发电机、基于风能转换的永磁无刷直流发电机和电池存储的组合。传统的电池控制采用比例积分控制方法，会导致稳定性问题。因此，在本文中，使用双向 dc_dc 转换器控制方法，该方法提供了更高的稳定性并使控制器设计变得简单。测试结果验证了控制算法在不同动态和稳态条件下的有效性。