高比例新能源接入场景电力系统频率分析模型改进与应用  

Improvement and Application of Frequency Analysis Modules for Power System in High Proportion of Renewable Energy Situation

作　　者：龚浩岳 周勤勇 郭强 秦晓辉 赵珊珊 苏丽宁 贺海磊 GONG Haoyue;ZHOU Qinyong;GUO Qiang;QIN Xiaohui;ZHAO Shanshan;SU Lining;HE Hailei(State Key Laboratory of Power Grid Safety and Energy Conservation(China Electric Power Research Institute),Haidian District,Beijing 100192,China)

机构地区：[1]电网安全与节能国家重点实验室(中国电力科学研究院有限公司),北京市海淀区100192

出　　处：《电网技术》2021年第12期4603-4611,共9页Power System Technology

基　　金：国家自然科学基金项目(U1766201)。

摘　　要：分析现有含新能源系统频率模型进行仿真验证,发现其在部分工况下误差较大。通过在现有模型基础上增加原动机限幅环节,区分系统有效调差比例系数与有效惯量比例系数,提出了考虑限幅环节含新能源系统频率模型与简化聚合模型。通过典型系统算例表明,所提2种模型在不同新能源接入比例与类型下均有较好拟合预测效果,能够反映系统整体惯量和一次调频特性。通过实际含直流电源与新能源共同馈入电网算例表明,所提简化聚合模型可准确地反映系统频率变化情况,具有工程应用价值。By analyzing the existing frequency models of the systems with new energy,it is found that there exists a large margin of error under some certain conditions.By adding the limiting link of prime mover on the basis of the existing model,and distinguishing the proportion coefficient of effective adjustment and the proportion coefficient of effective inertia of the system,the frequency model and the simplified aggregation model of the new energy system with the limiting link are proposed.Typical system examples show that the two models have good fitting prediction effects under different new energy access proportions and different types.They can well reflect the overall inertia and the primary frequency regulation characteristics of the system.The actual power system example,which contains new energy and DC access,shows that the proposed simplified aggregation model can accurately reflect the frequency variation of the power system and has engineering application values.

关 键 词：高比例新能源 系统频率 简化聚合模型 系统惯量 一次调频 

分 类 号：TM721[电气工程—电力系统及自动化]