摘要
三相交流电子负载应用于三相电源测试时,输入电压若出现不平衡状况会产生负序电压影响系统性能,针对这一问题,提出基于端口受控的耗散哈密顿系统(PCHD)模型的无源反步控制策略。首先,建立系统在线电量参数下的PCHD模型,通过互联与阻尼分配法简化无源控制器的设计,确保系统在期望平衡点处全局稳定;其次引入反步控制策略对无源控制设计中的不足进行弥补,实现全局稳定的同时对参考值进行快速而精确的跟踪;最后将控制律转化为相电量参数下控制律。Matlab/Simulink仿真结果与实验验证了控制策略的有效性。
When the three-phase AC electronic load is applied to the three-phase power supply test,if the input voltage is unbalanced the negative sequence voltage will affect the system performance.To solve this problem,a passive backstepping control strategy based on port controlled Hamiltonian with disspation(PCHD)model is proposed.Firsdy,the PCHD model under the line-electric-quantitys of the system is established,and the design of the passive controller is simplified by the interconnection and damping distribution method to ensure the global stability of the system at the desired equilibrium point.Secondly,the backstepping control strategy is introduced to make up for the shortcomings in the passivity-based control design,so as to achieve global stability while tracking the reference value quickly and accurately.Finally,the control law is transformed into a control law under phase power parameters.Matlab/Simulink simulation results and experiments verify the effectiveness of the control strategy.
作者
刘浩东
蔡华锋
廖冬初
周杰
LIU Hao-dong;CAI Hua-feng;LIAO Dong-chu;ZHOU Jie(Hubei University of Technology,Wuhan 430068,China)
出处
《电力电子技术》
北大核心
2023年第9期79-82,102,共5页
Power Electronics
基金
国家自然科学基金(61473116)
高效利用及储能运行控制湖北省重点实验室基金项目(HBSKFZD2017008)
关键词
电子负载
电网不平衡
无源控制
electronic load
unbalanced grid
passivity-based control
