By the year 2023, the Tunisian power transmission grid has been projected to include photovoltaic pool of power of 937 MW, scattered throughout the whole landscape of the nation. This paper investigates high photovoltaic energy penetration impacts voltage regulation and dynamic performance of the grid. Load flow analysis is implemented to investigate the power system capability for the case of incorporating the desired photovoltaic power. Computer-based simulations have been used for evaluating the upgradation of the grid. Moreover, the study is based on bifurcation diagrams taking the photovoltaic generation as a bifurcation parameter and time response simulations to grid disturbances. Professional PSAT simulation toolbox has been used for the power flow simulation studies. Network- related faults like outage of photovoltaic farm event, three-phase short-circuit at a conventional bus, and voltage dip at the largest photovoltaic station have been considered. It is hoped that the results of the presented study would benefit Tunisian’s utility’s policies on integration of PV systems. Moreover, this comprehensive analysis and study will be a valuable guide for assessing and improving the performance of national grid systems of any other countries also, that gives the huge potential and need for solar energy penetration into the grid systems.

中文翻译：

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大光伏发电渗透对突尼斯电力系统电压调节和动态性能的影响

到 2023 年，突尼斯输电网预计将包括 937 兆瓦的光伏电力池，分散在全国各地。本文研究了高光伏能量渗透对电网电压调节和动态性能的影响。实施潮流分析以研究纳入所需光伏功率的情况下的电力系统能力。基于计算机的模拟已被用于评估电网的升级。此外，该研究基于将光伏发电作为分岔参数的分岔图和对电网扰动的时间响应模拟。专业的 PSAT 仿真工具箱已用于潮流仿真研究。光伏电站停电事件等网络相关故障，考虑了常规母线的三相短路和最大光伏电站的电压跌落。希望所提出的研究结果将有益于突尼斯公用事业公司在光伏系统集成方面的政策。此外，这种综合分析和研究将为评估和改善任何其他国家的国家电网系统的性能提供宝贵的指导，这为太阳能渗透到电网系统提供了巨大的潜力和需求。