摘要
针对直流微电网孤岛运行时,线路阻抗的不确定性和故障等作用致使控制器输出受系统参数突变的问题,提出了一种基于等价输入干扰的自适应无源控制方法(EID-APBC)。首先采用强跟踪滤波器在线估计出由不确定系统参数变化所引起的控制器等价输入干扰,然后由前馈补偿器对控制器的控制量进行修正补偿,最终消除直流微电网稳定域内的稳态控制误差。仿真结果表明,当系统参数发生变化时,直流微电网母线电压仍能保持在期望的参考值。EID-APBC控制的直流微电网在系统稳定域内具有良好的鲁棒性和控制性能。
When the DC micro-grid operates in an isolated island, due to the uncertainties of line impedance or interference, the output of controller will be affected by the sudden change of system parameters. To solve the problem, we propose a novel adaptive passivity-based control based on equivalent input disturbance(EID-APBC) method for DC micro-grid. Firstly, the equivalent input disturbance caused by the inaccurate system parameters is estimated by the strong tracking filter. Then, a feed-forward compensator is used to correct the control quantity of passivity-based control system and compensate the disturbance caused by time-varying parameters. Finally, the steady-state control error of the DC microgrid in the stable region can be eliminated. Simulation results show that when the parameters of actual system change, the bus voltage of DC micro-grid can be kept at the reference value. The DC micro-grid controlled by EID-APBC still has a good robustness and control performance in the stable region.
作者
杨帆
张峰毓
李东东
YANG Fan;ZHANG Fengyu;LI Dongdong(School of Electrical Engineering,Shanghai University of Electrical Power,Shanghai 200090,China)
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2019年第1期236-242,共7页
High Voltage Engineering
基金
国家自然科学基金(51407114)
上海市科委部分地方院校能力建设计划(17020500800)~~
关键词
直流微电网
强跟踪滤波器
等价输入干扰
自适应无源控制
鲁棒性
抗干扰性
DC micro-grid
strong tracking filter
equivalent input disturbance
adaptive passivity-based control
robustness
anti-interference
