频率连续跌落故障下风电系统调频控制策略  

Frequency Regulation Control Strategy for Direct⁃drive Wind Power Systems Considering Continuous Frequency Drop

作　　者：马骏超 王晨旭 孙丹[2] 彭琰 张泽宇 杨滢 MA Junchao;WANG Chenxu;SUN Dan;PENG Yan;ZHANG Zeyu;YANG Ying(State Grid Zhejiang Electric Power Co.,Ltd.Research Institute,Hangzhou 310014,Zhejiang,China;College of Electrical Engineering,Zhejiang University,Hangzhou 310027,Zhejiang,China;Power Regulation Center of State Grid Zhejiang Electric Power Co.,Ltd.,Hangzhou 310000,Zhejiang,China)

机构地区：[1]国网浙江省电力科学研究院,浙江杭州310014 [2]浙江大学电气工程学院,浙江杭州310027 [3]国网浙江省电力有限公司电力调控中心,浙江杭州310000

出　　处：《电气传动》2024年第12期61-70,78,共11页Electric Drive

基　　金：国网浙江省电力有限公司科技项目(5211DS23000F)。

摘　　要：针对电网频率连续跌落故障场景下风电系统在一次调控制结束后可能存在的频率二次跌落问题,分析了直驱式风电系统的一次调频控制原理,提出了以前、后采样时刻频率变化率乘积和差值组合作为判据的直驱式风电系统一次调频控制策略。根据所建立的判据,通过综合考虑风机转速、频率偏差和频率收敛速度,对直驱式风电系统在不同频率响应阶段的下垂系数进行调整,以实现风电系统的主动频率支撑和柔性调频退出。基于Matlab/Simulink对直驱式风电系统进行了仿真研究,验证了所提控制策略的有效性。In response to the potential frequency secondary drop problem of direct-drive wind power systems in the scenario of continuous frequency drop faults in the power grid,the principle of primary frequency regulation of direct-drive wind power systems was analyzed.A primary frequency regulation control strategy for direct-drive wind power systems was proposed based on the product and difference combination of frequency change rates at pre-and post-sampling times.According to the established criteria,the droop coefficient of the direct-drive wind power system in different frequency response stages was adjusted by comprehensively considering the fan speed,frequency deviation,and frequency rate of convergence,to realize the active frequency support and flexible frequency modulation exit of the wind power system.A simulation model of a direct-drive wind power system was established in Matlab/Simulink to verify the effectiveness of the proposed control strategy.

关 键 词：电网频率连续跌落 直驱式风电系统 下垂系数 一次调频控制 

分 类 号：TM71[电气工程—电力系统及自动化]