摘要
电网频率安全和稳定性是电力系统的重要性能指标,而电力系统的惯量水平是影响频率响应能力的关键因素。由于我国实施双碳战略,新能源发电比例持续提高,导致电力系统的惯量水平不断下降,使得电网在遭受有功扰动时的频率波动加剧,系统运行边界收缩。为了提高电力系统在高新能源渗透场景下的惯量态势感知能力,增强电力系统对有功扰动的频率适应性、量化系统运行边界,基于电力系统频率响应模型,分析了电网在受到有功扰动后不同时间尺度下的频率响应过程,构建了系统频率响应数学关系。基于频率响应全过程,构建计及新能源虚拟惯量的电力系统最低惯量评估模型及其求解算法。最后,基于IEEE-39节点模型,通过仿真试验验证了所提方法的有效性和准确性。
Grid frequency security and stability are important performance indicators of the power system,and the inertia level of the power system is a key factor affecting the frequency response capability.Due to the implementation of the dual-carbon strategy in China,the proportion of new energy generation continues to increase,resulting in a continuous decline in the inertia level of the power system,which intensifies the frequency fluctuation of the power grid when it suffers from active perturbations and shrinks the system operation boundary.In order to improve the inertia situational awareness of the power system in the high-tech energy penetration scenario,enhance the frequency adaptability of the power system to active perturbations,and quantify the system operation boundary,based on the frequency response model of the power system,the frequency response process of the power grid in different time scales after being subjected to active perturbations is analyzed,and the mathematical relationship of the system frequency response is constructed.Based on the frequency response process,the minimum inertia assessment model and its solution algorithm are constructed to take into account the virtual inertia of new energy sources.Finally,based on the IEEE-39 node model,the effectiveness and accuracy of the proposed method are verified through simulation experiments.
作者
王毅
陈中
周涛
刘勃
刘子诚
WANG Yi;CHEN Zhong;ZHOU Tao;LIU Bo;LIU Zicheng(State Key Laboratory of Smart Grid Protection and Control,Nanjing 211106;NARI Group Corporation,Nanjing 211106;School of Electrical Engineering,Southeast University,Nanjing 210096;School of Automation,Nanjing University of Science and Technology,Nanjing 210094)
出处
《电气工程学报》
CSCD
北大核心
2024年第1期254-260,共7页
Journal of Electrical Engineering
基金
智能电网保护和运行控制国家重点实验室开放课题资助项目(SGNR 0000KJJS2200305)。
关键词
低惯量电力系统
虚拟惯量
最低惯量评估
频率稳定性
Low inertia power system
virtual inertia
minimum inertia evaluation
frequency stability
