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针对风电、光伏等新能源场站大规模并网，使传统电网逐渐转变为非同步电源主导的低惯量、弱阻尼系统，系统频率动态特性发生较大变化的问题，从控制角度对新能源场站中风电、光伏、储能的惯量支撑功能进行分析，阐述了新能源场站中风电、光伏、储能惯量支撑的能量来源、响应策略、功能定位；并建立含新能源场站的电力系统频率动态分析模型，分析惯量、阻尼、调差系数等因素对系统频率变化的影响。研究表明，新能源高渗透背景下，系统转动惯量减少，频率稳定性面临严峻挑战，开展新能源场站惯量支撑功能改造是应对新能源并网挑战的关键措施。
Abstract：In response to the integration of wind power, photovoltaic, and other new energy stations on a large scale, which gradually transforms traditional power grid into low-inertia, weak-damping system dominated by asynchronous power sources, leading to significant changes in dynamic characteristics of system frequency, this paper delves into the inertia support capabilities of wind power, photovoltaic, and energy storage systems within these new energy stations from a control perspective, and clarifies the energy sources, response strategies, and functional roles of inertia support provided by wind power, photovoltaic, and energy storage components. Additionally, a sophisticated frequency dynamic analysis model for power systems is developed, encompassing new energy stations, to analyze the intricate impact of factors such as inertia, damping, and difference adjustment coefficients on system frequency fluctuations. Crucially, the research underscores that under the high penetration of new energy, the reduction in system rotational inertia poses formidable challenges to frequency stability. Thus, embarking on modifications to enhance the inertia support functions of new energy stations is identified as a pivotal strategy to mitigate the challenges associated with new energy integration, which is of paramount importance in safeguarding the secure and stable operation of the power grid.
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基本信息:
DOI：10.19929/j.cnki.nmgdljs.2024.0049
中图分类号:
引用信息:
[1]刘鸿清,张秀琦,王立强等.新能源场站惯量支撑与频率响应特性研究[J],2024,42(04):14-22.DOI:10.19929/j.cnki.nmgdljs.2024.0049.
基金信息:
国家重点研发计划项目“大规模可再生能源基地特高压多端直流输电外送关键技术”（2023YFB2405900）;内蒙古电力（集团）有限责任公司科技项目“大规模分布式光伏并网振荡风险及预警方法研究”（2023-5-28）