考虑频率二次跌落的系统频率特征评估及风电调频参数整定  

Evaluation of System Frequency Characteristic and Parameter Setting of Frequency Regulation for Wind Power Considering Secondary Frequency Drop

作　　者：张雯欣 吴琛 黄伟 高晖胜 程旻 辛焕海 ZHANG Wenxin;WU Chen;HUANG Wei;GAO Huisheng;CHENG Min;XIN Huanhai(Polytechnic Institute,Zhejiang University,Hangzhou 310027,China;Yunnan Power Grid Corporation,Kunming 650011,China;College of Electrical Engineering,Zhejiang University,Hangzhou 310027,China)

机构地区：[1]浙江大学工程师学院,浙江省杭州市310027 [2]云南电网有限责任公司,云南省昆明市650011 [3]浙江大学电气工程学院,浙江省杭州市310027

出　　处：《电力系统自动化》2022年第8期11-19,共9页Automation of Electric Power Systems

摘　　要：风电机组可释放转子动能为系统提供有功支撑,但转速恢复时可能引起频率二次跌落,不利于系统频率稳定。目前,综合考虑系统频率一次跌落与二次跌落过程中的频率特征对风电调频参数进行整定的研究较少。为此,首先提出统一结构模型以近似表征同步机、风电机组等各种发电设备的功率响应。基于此,解析系统频率轨迹并量化评估频率平均变化率和一次、二次跌落最低点等频率特征。进一步,在综合考虑两次频率跌落的情况下,以提升频率最低点为目标建立优化问题整定风电调频参数。最后,仿真验证了提出的频率特征评估方法及参数整定方法的有效性,表明通过合理设置风电调频参数可同时提升两次频率跌落的最低点。Wind turbines can release kinetic energy of rotors to provide active power to the system,but it may cause a secondary frequency drop when the speed is recovered,which is not conducive to the stability of the system frequency.At present,there are few studies on parameter setting of frequency regulation for wind power considering frequency characteristics in the process of a primary and secondary frequency drop.Therefore,a unified structural model is proposed to approximate the power response of the synchronous machine,wind turbine and other power generation equipment.Based on this,the frequency trajectory of the system is analyzed and frequency characteristics including the average rate of frequency changes,the nadirs of primary and secondary frequency are quantitatively evaluated.Further,considering the two kinds of frequency drops comprehensively,an optimization problem is established to adjust the frequency regulation parameters of wind power with the goal of raising the frequency nadir.Finally,the effectiveness of the proposed frequency characteristic evaluation and parameter setting method is verified by simulations,which shows that the two frequency drop can be increased by setting the frequency regulation parameters of wind power reasonably.

关 键 词：风电机组 统一结构模型 频率二次跌落 频率特征 调频参数整定 

分 类 号：TM614[电气工程—电力系统及自动化]