摘要
新型电力系统中新能源、水电等清洁能源占比不断提升,高比例新能源带来的频率越限和高比例水电带来的超低频振荡风险日益突出。为支撑新型电力系统不同场景下频率安全稳定分析与控制研究需求,构建频率稳定标准算例(The Chinese Society for Electrical Engineering-frequency stability,CSEE-FS)。针对传统频率稳定问题,构建新能源装机及出力占比均在50%以上的高频、低频场景,分析故障强度、新能源出力及控制策略等对频率偏差最大值及其出现时间、稳态频率偏差的影响;针对超低频振荡问题,构建水电出力占比达89%场景,分析交直流不同故障形态、调速器关键参数、系统惯量等对振荡频率、振荡幅值的影响。敏感性分析结果表明,该文所建算例系统可准确反映不同频率稳定场景特性,且具备良好的扩展性,能满足新型电力系统频率安全稳定分析与控制方法验证需求。
The proportion of clean energy such as new energy and hydropower in the new power system increases continuously.The frequency beyond the limit brought by high proportion of new energy and the ultra-low frequency oscillation risk caused by high proportion of hydropower are becoming increasingly prominent.In order to support the research needs of frequency safety and stability analysis and control under different scenarios of the new power system,this paper constructs the frequency stability benchmark test system(The Chinese Society for Electrical Engineering-frequency stability,CSEE-FS).For the traditional frequency stability problem,high-frequency and low-frequency scenarios with new energy installation and output ratios both above 50%are constructed to analyze the influence of disturbance intensity,new energy output and control strategy on the maximum frequency deviation and its corresponding occurrence time as well as steady-state frequency deviation.For the ultra-low frequency oscillation problem,a scenario with hydropower output ratio reaching 89%is constructed to analyze the influence of different AC/DC disturbance types,key parameters of governor and system inertia on oscillation frequency and amplitude.The sensitivity analysis results show that the benchmark test system constructed in this paper can accurately reflect the characteristics of different frequency stability scenarios and has respectable scalability,which can meet the verification needs of frequency safety and stability analysis and control methodologies for new power systems.
作者
吴萍
赵兵
程奕
孙华东
WU Ping;ZHAO Bing;CHENG Yi;SUN Huadong(National Key Laboratory of Grid Security(China Electric Power Research Institute),Haidian District,Beijing 100192,China)
出处
《中国电机工程学报》
EI
CSCD
北大核心
2024年第19期7531-7542,I0004,共13页
PROCEEDINGS OF THE CHINESE SOCIETY FOR ELECTRICAL ENGINEERING
基金
国家自然科学基金项目(U21666601,51977197)。
关键词
标准算例
高比例新能源
高比例水电
高频
低频
超低频振荡
benchmark test system
high proportion rate new energy
high proportion hydropower
high frequency
low frequency
ultra-low frequency oscillation
