Impacts of Renewable Energy on Transient and Voltage Stability of Electric Power Systems

稳定是电力系统安全运行的基本前提。随着负荷需求的不断增加和输电网络的老化，世界范围内的电力系统的运行条件已经越来越接近其稳定极限。与此同时，可再生能源的整合不断增加。特别是，加拿大在生产和使用各种可再生能源方面处于世界领先地位。虽然可再生能源带来了许多好处，但它们也对电力系统的稳定性提出了新的挑战。例如，风力涡轮机和光伏发电机对扰动的不同动态响应可能会加剧突发事件，从而恶化整个电网的稳定性。随着可再生能源的渗透率在可预见的未来继续增加，研究不同可再生能源对各种电力系统稳定性的影响，以提高现代低碳电力系统的稳定性和可靠性势在必行。 该研究计划旨在研究可再生能源的随机性对电力系统暂态和电压稳定性的影响，这些影响尚未得到很好的认识和解决。事实上，可再生能源的可变性可能会影响暂态稳定的稳定区域，并降低电压稳定裕度。此外，拟议的研究计划将开发分析和计算工具，对整合可再生能源的系统进行稳定性分析，并进一步设计控制措施，以提高这些系统的稳定性。从理论的角度来看，本研究计划将利用先进的非线性系统理论在电力系统的背景下的概念，并通过纳入随机性扩展现有的结果，甚至产生新的理论成果在自己的权利。从实用的角度来看，研究成果将提供物理见解，定量措施和计算工具，系统运营商在评估和提高电力系统的稳定性集成可再生能源在真实的世界。研究成果将推动可再生能源与电网的无缝整合，这不仅在加拿大，而且在全球范围内都是提倡的。四名研究生将在这个计划中接受培训，将装备精良，以促进加拿大电力行业的未来。特别是，魁北克在世界水电发展舞台上建立了良好的声誉，现在处于将大量风力发电纳入电网的研究前沿。在这方面，该研究计划的目标符合当地产业的利益，该研究计划的成果将在不久的将来产生与行业合作伙伴的各种合作机会。

Stability is a fundamental premise for secure operation of every electric power system. As the loading demands are constantly increasing and the transmission networks are aging, the operating conditions of worldwide power systems have been pushed ever closer to their stability limits. Meanwhile, the integration of renewable energy sources has been constantly increasing. Particularly, Canada is a world leader in the production and use of all kinds of renewable energy. Although renewables bring numerous benefits, they also pose new challenges to power system stability. For example, the distinct dynamic responses of wind turbines and photovoltaic generators to disturbances may aggravate the contingencies, and thus deteriorate the stability of the overall power grid. As the penetration of renewables continues to increase in the foreseeable future, it is imperative to study the impacts of different renewables on various power system stability properties in order to enhance the stability and reliability of modern low carbon power systems. This research program intends to examine the impacts of the randomness of renewables on transient and voltage stability of electric power systems, which have not been well recognized and addressed. Indeed, the variability of renewables may affect the stability regions for transient stability and reduce the voltage stability margins. In addition, the proposed research program will develop analytical and computational tools to conduct stability analysis for the systems integrating renewables, and furthermore design control measures to enhance the stability of those systems. From the theoretical perspective, this research program will exploit concepts from advanced nonlinear system theory in the context of power systems, and extend the existing results by incorporating stochasticity and even produce novel theoretical results in their own rights. From the practical view point, the research outcomes will provide physical insights, quantitative measures and computational tools to system operators on evaluating and enhancing the stability of power systems integrating renewables in the real world. The research outcomes will advance seamless integration of renewable energy sources into power grids, which is advocated not only in Canada but also globally. The four graduate students to be trained in this program will be well-equipped to contribute to the future of the Canadian power industry. In particular, Quebec has developed a solid reputation on the world stage in hydro-electric development, and is now at the forefront of research on integrating significant amounts of wind power into its grid. In this regard, the goals of the research program comply with the interests of local industries, and the outcomes of this research program will generate various collaboration opportunities with industry partners in the near future.