考虑构网型风电频率响应的电力系统低频减载策略研究  

Research on under-frequency load shedding strategy of power system considering frequency response of grid-forming wind power

作　　者：邹小明 李强 汪成根 贾勇勇 汤奕[2] Zou Xiaoming;Li Qiang;Wang Chenggen;Jia Yongyong;Tang Yi(Jiangsu Electric Power Research Institute Co.,Ld.,Nanjing 210000,China;School of Electrical Engineering,Southeast University,Nanjing 210096,China)

机构地区：[1]江苏省电力试验研究院有限公司,江苏南京210000 [2]东南大学电气工程学院,江苏南京210096

出　　处：《可再生能源》2024年第8期1089-1095,共7页Renewable Energy Resources

基　　金：江苏省电力试验研究院有限公司科技项目(DSY202201)。

摘　　要：大规模构网型风电机组并网会改变电力系统频率响应特性,而传统低频减载策略尚未计及构网型风电机组的影响,可能导致大功率缺额后的系统减载量不合理。文章提出一种考虑构网型风电频率响应的电力系统低频减载策略。首先,基于构网型风电虚拟惯量和一次调频控制模型,建立计及构网型风电频率响应的系统频率响应简化模型;其次,分析构网型风电的有功响应特性对系统不平衡功率量的影响,进而精细化估算用于指导电网多轮次减载的不平衡功率量,从而提出自适应低频减载实施策略;最后,通过算例分析,验证了文章所提低频减载策略的可行性和有效性。The large-scale grid-forming wind turbine generators(WTGs)will change the frequency response characteristics of the power system,while the traditional low-frequency load shedding strategy has not taken into account the impact of grid-forming wind power,which may lead to unreasonable system load shedding after high power shortage.This paper proposes a low-frequency load shedding strategy for power systems that considers the frequency response of grid-forming wind power.Firstly,based on the virtual inertia of grid-forming wind power and the primary frequency control model,a simplified system frequency response model is established that takes into account the frequency response of grid-forming wind power.Secondly,the impact of the active power response characteristics of grid-forming wind power on the unbalanced power amount of the system is analyzed,and then the unbalanced power amount used to guide multiple rounds of load shedding in the power grid is finely estimated,thus proposing an adaptive low-frequency load shedding implementation strategy.Finally,the feasibility and effectiveness of the low-frequency load shedding strategy proposed in this paper were verified through numerical analysis.

关 键 词：构网型风电机组 虚拟惯量 一次调频 功率缺额 低频减载 

分 类 号：TK811[动力工程及工程热物理—流体机械及工程]