弹性电网关键技术研究的进展与展望

Research and prospect on key technologies of resilient power grid

现代电网发展日益复杂、新的供电威胁与日俱增,特别是在处于大量新能源系统并网发电的发展潮流中,传统的电力系统在遭遇突发冲击或扰动时会显得格外脆弱,已不能满足用户或电力企业愈发严格的用电质量要求。为了使电网在小概率-高损失的事件中仍能保持基本的运行功能,具备抵御性、适应性以及快速恢复能力的“弹性电网”得到了众多学者的青睐,其可有效提高系统的弹性恢复力,增强系统的抗灾抗扰动能力,进而提高系统的整体运营能力。着眼于弹性电网的优化策略,基于弹性恢复力理论阐述了弹性电网的基本架构,根据系统弹性提升的方法分析了发展弹性电网所用到的关键技术,从传统电网到未来电网的演化过程中展望了弹性电网的发展趋势。

The development of modern power grids is becoming more and more complex,and new power supply threats are increasing.Especially in the development trend of a large number of new energy systems connected to the grid,the traditional power system will appear extremely vulnerable when encountering sudden shocks or disturbances,which undoubtedly cannot satisfy the increasingly strict power quality requirements of users or power companies.In order to maintain the basic operating functions of the power grid in the event of small probability and high loss,the"resilient power grid"with resilience,adaptability and rapid recovery capabilities has been favored by many scholars,which can effectively improve the elastic recovery of the system,strengthen the ability of system to resist disasters and disturbances,thereby improving the overall operational capabilities of the system.This paper focuses on the optimization strategy of resilient power grids.Firstly,it explains the basic architecture of resilient power grids based on the theory of resilient resilience.Secondly,it analyzes the key technologies used in the development of resilient power grids based on the method of improving system resilience.The development trend of resilient power grid is prospected during the evolution from traditional power grids to future power grids.