高比例可再生能源电力系统的协同优化运行技术展望

近年来,随着风力发电和太阳能发电的大规模快速发展,以及交流、直流输电线路的不断建设,中国电力系统呈现高比例可再生能源和交直流混联电网两大重要特征和趋势。在分析国内外研究现状及存在问题的基础上,文中从源—荷双重不确定性的交直流混联系统态势感知、考虑宽频带稳定约束的大规模可再生能源集群并网协调控制、高渗透率可再生能源配电系统源—网—荷交互的灵活重构与协同运行、高比例可再生能源并网的交直流混联系统多尺度运行优化与决策等四个方面,提出了含高比例可再生能源电力系统协同优化运行方面亟待研究的关键技术内容,构思了研究方案,并对其难点问题与挑战进行了展望。

Prospects of Coordination and Optimization for Power Systems with High Proportion of Renewable Energy

With the rapid development of wind power and solar power generation as well as steady development of AC and DC transmission lines, China''s power system exhibits two important characteristics and trends: high proportion of renewable energy and AC/DC hybrid power grid in recent years. Based on an analysis of the present development and existing problems concerning collaborative optimization operation of AC/DC hybrid system with a high proportion of renewable energy, the key technologies demanding prompt research in four aspects are proposed, respectively. That is, situation awareness of AC/DC hybrid system under dual uncertainties of source and load, coordinated control of large renewable energy clusters considering the broadband stability constraints, flexible reconfiguration and cooperative operation with the interaction of source-grid-load in distribution systems with a high proportion of renewable energy, and multi-scale operation optimization and decision making in AC/DC hybrid system with a high proportion of renewable energy integrated. Difficulties and challenges are previewed.