摘要
实际工程运行数据显示,基于双馈感应发电机(double-fed induction generator,DFIG)的风电并网系统的稳定运行特性与风速密切相关。现有分析方法仅适用于特定风速条件下的稳定性分析,无法直接应用于系统全风速工作区间的振荡风险评估。为准确表征双馈风机全风速范围内的频域端口特性,该文将风速变量引入传统导纳模型中,并充分考虑频率耦合效应、直流母线动态及励磁等因素的影响,建立双馈风机风速-频率二元导纳模型,并提出基于二元导纳模型的稳定性分析方法以有效分析全风速区间的系统稳定性。最后,以双馈风机串补线路并网系统为典型案例进行仿真分析,仿真结果验证模型的准确性和分析方法的有效性。该研究成果可为新能源并网系统的全工作区间振荡分析与有效抑制提供重要参考。
The operation data of the actual projects showed that the stable operation characteristics of the double-fed induction generator-based wind power grid-connected system were closely related to the wind speed.The existing analysis methods were only suitable for stability analysis under specific wind speeds,and cannot be extended to the oscillation risk assessment under the whole wind speed operating space.In order to accurately characterize the port characteristics of the DFIG with the full wind speed range,the wind speed was introduced into the traditional admittance model,and the influence of the frequency coupling,the DC bus dynamic and the excitation were also considered,and the two-variable(i.e.wind speed and frequency) admittance model of DFIG was established.Then a stability analysis method based on the two-variable admittance was proposed to effectively analyze the system stability under the whole wind speed range.The DFIG-based grid-connected system with series compensation was taken as a typical case for simulation and analysis,and the accuracy of the model and the validity of the analysis method were verified.The research results provide an important reference for the oscillation analysis and effective suppression of the new energy grid-connected system.
作者
杜程茂
杜雄
樊丽娟
苏婧媛
DU Chengmao;DU Xiong;FAN Lijuan;SU Jingyuan(State Key Laboratory of Power Transmission Equipment and System Security and New Technology(Chongqing University),Shapingba Distirct,Chongqing 400044,China;Shenzhen Power Supply Company(China Southern Power Grid),Shenzhen 440304,Guangdong Province,China)
出处
《中国电机工程学报》
EI
CSCD
北大核心
2022年第14期5300-5311,共12页
Proceedings of the CSEE
基金
国家自然科学基金项目(51937001)
南方电网公司科技项目(090000KK52200151)。
关键词
双馈风机
稳定性分析
二元导纳模型
风速
稳定性判据
double-fed induction generator
stability analysis
two-variable admittance
wind speed
stability criterion
