能源互联网背景下电网备用问题探索

Research on Reserve Services of the Power Grid Under the Background of Energy Internet

能源互联背景下,可再生能源发电的增长与交直流特高压互联是我国电网的重要发展趋势,使得系统的事故备用与净负荷功率波动的备用需求显著增加。同时,负荷侧、储能及网间备用资源将成为传统常规电源备用的重要补充。国内当前基于"两个细则"的辅助服务分类与管理模式将难以适应未来电网运行备用的管理需求。为此,文章提出了基于功率平衡控制过程的备用分类,明确了各类备用的响应时间与持续提供时间,从而有效兼容源、网、荷、储各类备用资源,并对各类资源可提供的备用类型进行了讨论。文章进一步提出了市场化的备用组织建议,并讨论了新备用体系的实施所面临的若干问题。

Under the background of energy Internet,the power grid in China is witnessing an increasing penetration level of renewable energy power generation and the AC/DC ultra-high voltage(UHV)interconnection between regional power grids,which increases greatly the system reserve requirement for contingency and system power fluctuation.At the same time,reserve sources from demand side and energy storage will become important complement to conventional generators.The current management mode of ancillary service categorization and management based on"two rules"can hardly satisfy management requirements of future power grid reserve services.In this respect,a new reserve categorization system is proposed for the energy internet from the perspective of controlling process.The response time and duration requirements are specified.The new reserve categorization system is compatible with diversified reserve sources from generators,networks,loads,and energy storage.The types of reserve services they can provide are also discussed.The corresponding marketoriented reserve configuration suggestions and related problems to implement the new reserve system are put forward.