考虑频率稳定约束的电网新能源承载能力评估方法及其应用  

Evaluation Method and Application of Carrying Capacities of New Energy in Power Grid Considering the Constraints of Frequency Stability

作　　者：罗澍忻 朱廷猛 余浩 陈鸿琳 孙海顺[2] 刘瑞宽 彭虹桥 左郑敏 李秋彤 LUO Shuxin;ZHU Tingmeng;YU Hao;CHEN Honglin;SUN Haishun;LIU Ruikuan;PENG Hongqiao;ZUO Zhengmin;LI Qiutong(Grid Planning&Research Center,Guangdong Power Grid Co.,Ltd.,Guangzhou 510080,China;School of Electrical and Electronic Engineering,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]广东电网有限责任公司电网规划研究中心,广州510080 [2]华中科技大学电气与电子工程学院,武汉430074

出　　处：《南方电网技术》2023年第10期65-76,共12页Southern Power System Technology

基　　金：国家重点研发计划资助项目(2018YFB0904001);中国南方电网有限责任公司科技项目(GDKJXM20212053)。

摘　　要：随着风电、光伏占比的不断上升,系统惯量以及常规备用调频容量趋于降低,电力系统频率稳定问题凸显。从频率稳定约束的角度,研究了基于频率响应模型的电网新能源承载能力评估方法。首先,建立了含新能源发电等多种频率调节电源的电力系统频率响应模型,并通过电磁暂态仿真验证了模型的有效性。然后,以频率跌落最低值和最大频率变化率为频率稳定约束,提出基于频率响应模型的电网新能源承载能力评估方法。该方法可以根据新能源占比构建系统的频率稳定域,评估系统的新能源承载能力。最后,通过所提方法在系统层面评估考虑频率稳定约束的电网新能源承载能力以及新型频率控制技术对于电力系统频率稳定性的提升作用研究中的应用,验证了方法的有效性与适用性。As the proportion of wind power generation and photovoltaic power generation continues to increase,the inertia of the power system and the conventional reserve capacity for frequency regulation are decreased.This causes power system frequency stability to be prominent.From the point of view of frequency stability constraints,this paper studies the evaluation method of grid renewable energy carrying capacity based on the frequency response model.Firstly,the frequency response model of the power system including renewable energy power generation and other frequency-regulated power sources is established,and the validity of the model is verified by electromagnetic transient simulation.Then,taking the minimum frequency(fNadir)and the maximum rate of change of frequency(RoCoF)as frequency stability constraints,a method for evaluating the carrying capacity of grid renewable energy based on the frequency response model is proposed.This method can construct the stability domain of the power system frequency according to the proportion of renewable energy generation,and evaluate the carrying capacity of renewable energy genera⁃tion by the power system.Finally,the effectiveness and applicability of the method are verified through the application of the proposed method in evaluating the power grid renewable energy carrying capacity considering the frequency stability constraints at the system level and assessment of new frequency control technology to improve power system frequency stability.

关 键 词：频率稳定性 新能源承载能力 频率响应模型 评估方法 

分 类 号：TM73[电气工程—电力系统及自动化]