摘要
直驱式永磁同步风电机组全功率并网变流器的直流侧母线电压受网侧电网电压三相不平衡扰动,在此情况下会影响直流侧电压的稳定性。故提出应用微分跟踪器与模糊PID控制电压环策略。首先分析在电网电压不平衡条件下直流母线电压波动原理。运用微分跟踪器TD合理地提取微分信号,提取的微分信号与模糊PID控制结合控制电压外环,利用控制理论计算模糊PID参数的范围。与传统控制方式相比,加入了微分环节和模糊控制抑制了直流母线电压波动。仿真结果验证了微分跟踪器与模糊PID控制策略的有效性。
The DC side bus voltage of full-power grid-connected converter of direct-drive permanent magnet synchronous wind turbine is influenced by three-phase unbalanced disturbance of grid side voltage,which will affects the stability of DC side voltage.Therefore,a strategy of controlling voltage loop with differential tracker and fuzzy PID is proposed.The fluctuation principle of DC bus voltage under the condition of imbalanced grid voltage is analyzed.The differential tracker TD is used to extract the differential signal reasonably.The extracted differential signal is combined with fuzzy PID control to control the voltage outer loop.The control theory is used to calculate the range of fuzzy PID parameter.In comparison with the traditional control method,the differential link and fuzzy control are added to suppress the DC bus voltage fluctuation.The simulation results verify that the strategy of differential tracker and fuzzy PID control is effective.
作者
马幼捷
洪发平
周雪松
陶珑
石雪琦
MA Youjie;HONG Faping;ZHOU Xuesong;TAO Long;SHI Xueqi(School of Electrical and Electronic Engineering,Tianjin University of Technology,Tianjin 300384,China;School of Electrical and Information Engineering,Tianjin University,Tianjin 300192,China)
出处
《现代电子技术》
北大核心
2020年第17期96-101,共6页
Modern Electronics Technique
基金
国家自然科学基金项目(51877152)。
