摘要
虚拟同步发电机技术(VSG)因可使逆变器具备同步发电机的特性,得到了广泛的研究和应用。针对虚拟同步发电机使用电压电流串级控制以及脉宽调制(PWM)控制底层的逆变器时,存在控制结构复杂和动态响应能力弱等问题,本文提出了一种基于虚拟同步发电机的模型预测电流控制策略(VSG-MPCC)。该控制策略首先获得虚拟同步发电机的输出电流,将其作为模型预测控制的参考值。其次根据系统的模型对之后的电流值进行预测,最后应用价值函数选择使两者误差最小的电压矢量组合作用于逆变器。所提控制策略省去了传统的电压电流串级控制和PWM调制环节,简化了控制结构并提升动态响应能力,提供了更好的功率和频率支撑。通过Matlab/Simulink仿真和实验验证了该控制策略的有效性。
The virtual synchronous generator(VSG)technology can give an inverter synchronous generator features,and it has been extensively investigated and utilized.Since the virtual synchronous generator using voltage-current series control and PWM modulation control that contribute to the complex control structure and weak dynamic response of the inverter at the bottom,this paper propounds a model predictive current control strategy based on the VSG(VSG-MPCC)to address the problems.To begin,the output current of the virtual synchronous generator is acquired and used as the model predictive control’s reference value.Secondly,the subsequent current value is anticipated using the system’s model,and finally the cost function is used to select the voltage vector combination which minimizes the error between the two,then it is acted on the inverter.The suggested control technique eliminates typical voltage-current cascade control and PWM modulation linkages,simplifies the control structure,and enhances dynamic response,resulting in improved power and frequency support.Simulink simulations and tests are used to verify the control strategy’s effectiveess.
作者
周立
刘金澍
周越鹏
刘一鸣
尚治博
ZHOU Li;LIU Jinshu;ZHOU Yuepeng;LIU Yiming;SHANG Zhibo(Faculty of Electrical and Control Engineering,Liaoning Technology University,Huludao 125000,China;Shanxi Sunshine Power Generation Co.,Ltd.,Yangquan 045000,China)
出处
《电工电能新技术》
CSCD
北大核心
2023年第4期19-28,共10页
Advanced Technology of Electrical Engineering and Energy
基金
国家自然科学基金项目(51177067)。
关键词
虚拟同步发电机
串级控制
模型预测电流控制
三电压矢量
virtual synchronous generator
series control
model prediction current control
three-voltage vector
