The ever increasing wind energy penetration into the utility grid causes challenges in the power quality (PQ) of the electrical supply. Therefore, this work proposed PQ assessment in the utility grid which is interfaced with the wind energy generation using Stockwell's transform (ST) under various operating events. The experimental set-up for assessing the PQ included an emulated wind generator synchronised with the utility grid at the point of common coupling. The current and voltage measurements are carried out using PQ analyser associated with WTViewer application software. The recorded signals of the voltage waveforms are assessed using ST to detect the various PQ issues related to the grid integration and wind generator's outage. To investigate the effects of various types of loads on the PQ, the same events are carried out. Various PQ disturbances are successfully detected using the proposed algorithm. Performance of the proposed algorithm is also tested on the grid integrated solar photovoltaic (PV) system to investigate and compare the PQ disturbances associated with the grid integrated solar PV system.

中文翻译：

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结合风能发电的公用电网电能质量评估

风能向公用电网的渗透不断增加，给电力供应的电能质量（PQ）带来了挑战。因此，这项工作提出了公用电网中的PQ评估，该评估与在各种运行事件下使用斯托克韦尔变换（ST）的风能发电相关。用于评估PQ的实验设置包括在公用耦合点与公用电网同步的仿真风力发电机。使用与WTViewer应用程序软件关联的PQ分析仪进行电流和电压测量。使用ST评估电压波形的记录信号，以检测与电网集成和风力发电机故障相关的各种PQ问题。为了调查各种类型的负载对PQ的影响，执行了相同的事件。使用提出的算法可以成功检测到各种PQ干扰。还对并网太阳能光伏（PV）系统测试了所提出算法的性能，以调查和比较与并网太阳能光伏系统相关的PQ干扰。