摘要
针对传统的统一电能质量调节器(UPQC)控制策略存在控制性能不佳的问题,提出无源控制与非线性PI控制相结合的混合控制策略,建立统一电能质量调节器的欧拉—拉格朗日(EL)模型。为加快误差能量收敛,采用注入阻尼的方法,设计电流内环无源控制器。利用非线性PI控制,设计电压外环控制器来获得较为准确的期望电流,有效地抑制了静态误差,使系统具有良好的动静态性能。在Matlab/Simulink搭建统一电能质量调节器的仿真模型。基于该模型的仿真结果验证了提出的控制策略的可行性。
Aiming at the problem of poor performance of traditional unified power quality conditioner(UPQC)control strategy,this paper proposes a hybrid control strategy combining passivity based control and non-linear PI control,and establishes the Euler-Lagrange(EL)model of the unified power quality conditioner(UPQC).Firstly,the current inner-loop passivity based controller is designed by injecting damping and the convergence of error energy is accelerated.Then,the non-linear PI control is adopted and a voltage outer loop controller is designed to obtain more accurate expected current,effectively suppresses the static error,and makes the system has good dynamic and static performance.Finally,a simulation model of the unified power quality regulator is built in Matlab/Simulink.The simulation results based on the model verifies the feasibility of the proposed control strategy.
作者
陈美锋
王久和
夏亮
CHEN Meifeng;WANG Jiuhe;XIA Liang(School of Automation,Beijing Information Science and Technology University,Beijing 100101,China)
出处
《电力科学与技术学报》
CAS
北大核心
2021年第1期169-176,共8页
Journal of Electric Power Science And Technology
基金
国家自然科学基金(51777012/51477011)
北京市自然科学基金—教委联合资助(KZ201911232045)。
关键词
统一电能质量调节器
EL模型
无源控制
非线性比例—积分控制
谐波
unified power quality conditioner
EL model
passivitybased control
nonlinear proportional-integral control
harmonic
