摘要
电网规划和运行方式人员仍难以有效掌握未来高比例非同步电源接入场景下,新型电力系统惯量水平随多种影响因素的变化情况,不能有效制定低惯量场景应对措施。针对该挑战,文中对比分析了面向规划决策与调控运行两种不同场景的惯量评估方法的主要区别,从基础方法、时间尺度和目标对象3个角度阐述了系统中长期惯量水平评估的挑战和研究框架。在此基础上,提出了一种基于规划数据的系统中长期惯量水平趋势评估方法,实现对未来不同运行场景下系统惯量变化区间的快速估计,并从惯量安全角度阐释了中长期惯量评估的应用场景。所提方法已应用于中国某省级电网“十四五”系统惯量变化趋势分析和安全分级预警,并基于惯量安全要求分析了该电网非同步电源极限渗透率和同步电源最小开机规模。
Power grid planning decision-makers and operators still have difficulty in effectively mastering the changes in the new power system inertia level with various influencing factors in the future high-proportion asynchronous power source access scenarios,and cannot effectively formulate response measures for low-inertia scenarios.To address this challenge,the main differences between inertia estimation methods for planning decisions and control operation in two different scenarios are compared and analyzed.The challenges and research framework of medium-and long-term inertia level estimation from three perspectives of basic methods,time scales,and target objects are elaborated.Based on this,the estimation method for the medium-and long-term inertia level tendency based on planning data is proposed,which realizes a rapid estimation of the range of system inertia changes in different future operation scenarios,and the application scenarios of medium-and long-term estimation from the perspective of inertia safety are explained.The proposed method has been applied to the analysis of inertia changing tendency and safety grading warning of the“14th Five-Year Plan”system in a provincial power grid in China.The extreme penetration rate of asynchronous power source and the minimum start-up scale of synchronous power sources are analyzed based on inertia safety requirements.
作者
张武其
文云峰
何烨
游广增
李鸿鑫
ZHANG Wuqi;WEN Yunfeng;HE Ye;YOU Guangzeng;LI Hongxin(Engineering Research Center of Ministry of Education for Power Transmission and Transformation New Technology(Hunan University),Changsha 410082,China;Power Grid Planning and Construction Research Center of Yunnan Power Grid Co.,Ltd.,Kunming 650011,China;Electric Power Research Institute of Shenzhen Power Supply Co.,Ltd.,Shenzhen 518000,China)
出处
《电力系统自动化》
EI
CSCD
北大核心
2024年第10期54-65,共12页
Automation of Electric Power Systems
基金
国家自然科学基金资助项目(52077066)
湖湘青年科技创新人才项目(2020RC3015)。
关键词
惯量评估
惯量安全
最小开机规模
新能源
同步电源
inertia estimation
inertia security
minimum start-up scale
renewable energy
synchronous power source
