The islanded microgrids are vulnerable to stability problems during high penetration of dynamic loads like induction motors (IMs), which results in continuous oscillations in voltage and frequency, resulting in disturbances in the islanded microgrid. In this work, a modified multi-second-order generalised frequency locked loop (MMSOGI-FLL) control algorithm is implemented. This control provides a fast response of the power converter; thereby the microgrid voltage/frequency are stabilised rapidly. Besides, the control also provides the dynamic reactive power for the sudden start of an IM load and regulates the common coupling point voltage in the islanded system. The MMSOGI-FLL control also provides harmonics elimination, fast convergence, DC offset removal and reactive power compensation in the islanded system. The implemented islanded system is a combination of a pico-hydro-based synchronous reluctance generator (SyRG), solar photovoltaic (PV) array and a battery energy storage (BES). The BES is connected at DC link to maintain the power equilibrium under a change in the load and power generation. Moreover, the system used in this work is proficient in feeding the non-linear load and dynamic load of an IM. The performance of this standalone microgrid is validated with extensive tests on the developed prototype, which meets the power quality requirement of the 1547.4 standards.

中文翻译：

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鲁棒的MMSOGI-FLL控制算法，用于改善具有动态负载的太阳能PV-SyRG pico hydro-BES岛式微电网的电能质量

孤岛微电网在动态负载（例如感应电动机（IMs））的高渗透期间容易受到稳定性问题的影响，这会导致电压和频率的连续振荡，从而导致孤岛微电网的干扰。在这项工作中，实现了改进的多二阶广义锁频环（MMSOGI-FLL）控制算法。该控制提供了电源转换器的快速响应；从而使微电网电压/频率迅速稳定。此外，该控制还为IM负载的突然启动提供动态无功功率，并调节孤岛系统中的公共耦合点电压。MMSOGI-FLL控件还可以在孤岛系统中提供谐波消除，快速收敛，消除直流偏移和无功补偿的功能。实施的孤岛系统是基于微水的同步磁阻发电机（SyRG），太阳能光伏（PV）阵列和电池能量存储（BES）的组合。BES连接在DC链路上，以在负载和发电量变化时保持功率平衡。此外，这项工作中使用的系统精通IM的非线性负载和动态负载。通过对开发的原型进行的广泛测试验证了此独立微电网的性能，该原型符合1547.4标准的电能质量要求。这项工作中使用的系统精通IM的非线性负载和动态负载。通过对开发的原型进行的广泛测试验证了此独立微电网的性能，该原型符合1547.4标准的电能质量要求。这项工作中使用的系统精通IM的非线性负载和动态负载。通过对开发的原型进行的广泛测试验证了此独立微电网的性能，该原型符合1547.4标准的电能质量要求。