不平衡电压下的DFIG模型预测直接功率控制  

Model Predictive Direct Power Control of DFIG Under Unbalanced Voltage

作　　者：王豪 董锋斌[1] 王凯 史新涛 WANG Hao;DONG Fengbin;WANG Kai;SHI Xintao(School of Electrical Engineering,Shaanxi University of Technology,Hanzhong 723000,China)

机构地区：[1]陕西理工大学电气工程学院,汉中723000

出　　处：《电力系统及其自动化学报》2024年第4期84-93,共10页Proceedings of the CSU-EPSA

基　　金：陕西省自然科学基础研究计划资助项目(2023-JC-YB-442)。

摘　　要：为提高双馈风力发电机在不平衡电网电压工况下的运行性能,提出一种扩张状态观测器与模型预测控制相结合的直接功率控制策略。首先,采用扩张状态观测器对系统中因负序分量引起的不确定项、模型误差及外部扰动等不确定因素进行参数估计。然后,结合模型预测控制理论建立双馈风力发电机模型预测直接功率控制数学模型。最后,针对不平衡电网电压下的功率振荡分量讨论功率优化补偿方案。仿真结果验证了所提方法的有效性。To enhance the running performance of a doubly-fed induction generator(DFIG)under unbalanced grid voltage conditions,a direct power control strategy which combines an extended state observer(ESO)and model predictive control is proposed.First,the ESO is applied to estimate parameters for uncertainties in the system caused by negative-sequence components,model errors and external perturbations.Then,a model predictive direct power control mathematical model of DFIG is established by combining the model predictive control theory.Finally,the power optimization compensation scheme is discussed for the power oscillation component under the unbalanced grid voltage.Simulation results verify the effectiveness of the proposed method.

关 键 词：双馈风力发电机 不平衡电压 扩张状态观测器 模型预测直接功率控制 鲁棒性 

分 类 号：TM315[电气工程—电机]