面向高比例新能源消纳的地区电网柔性互联规划与运行技术综述

Review of Flexible Interconnection of Regional Grids Interconnection Planning and Operation Techniques for High Percentage of Renewable Energy Consumption

随着大规模新能源逐步渗透于不同电压等级的各级电网,地区电网呈现源荷分布不均、输变电设备容量紧张与过剩并存,新能源消纳严重受限。地区电网内部或之间中电压等级的互联新形态可有效降低输电升/降压冗余,分担主网架输送压力,具有广阔应用前景。对面向高比例新能源消纳的地区电网柔性互联规划与运行技术进行评述和展望。首先概述了高比例新能源消纳的地区电网新形态与新挑战;其次介绍了现有典型柔性互联技术;在此基础上,分别从规划和运行角度对地区电网的柔性互联技术进行评述,阐明新形态下地区电网亟需关注的关键问题、解决思路;最后,对现有研究不足进行总结和展望,为高比例新能源地区电网柔性互联规划与运行提供科学依据。

With the gradual penetration of large-scale renewable energy in power grids of different voltage levels,regional power grids show uneven distribution of sources and loads,and the transmission and substation equipment capacity is both tight and excessive.the consumption of renewable energy is seriously limited.The new form of interconnection of medium voltage levels within or between regional power grids can effectively reduce redundant transmission and share the transmission pressure of the upper grid,which has broad application prospects.In this paper,we review and prospect the flexible interconnection planning and operation technology of regional grids for a high percentage of renewable energy consumption.Firstly,the new forms and challenges of regional power grids to cope with the high proportion of renewable energy consumption are introduced.Secondly,typical flexible interconnection technologies are elaborated.On this basis,it sorts out the status quo of interconnection planning and operation technology.It summarizes and puts forward the research focus and solution ideas of key factors of regional power grids in the new form.Finally,the summary and prospects provide a scientific basis for the planning and operating regional power grids with a high proportion of renewable energy.