摘要
为加快T型三电平光伏并网系统的动态响应速度,同时避免传统有限集模型预测控制中预测模型和代价函数在线计算量大的不足,在αβ静止坐标系下提出一种功率前馈的快速矢量选择有限集模型预测并网控制方法。该方法在传统电压外环中引入光伏阵列输出功率前馈作为电流内环的参考值;并结合空间矢量脉宽调制(space vector pulse width modulation,SVPWM)思想,只允许接近逆变器输出参考电压矢量的开关状态参与在线计算与评估。通过Matlab搭建系统仿真模型,与未采用功率前馈及传统有限集模型预测进行对比分析。仿真结果表明:采用功率前馈的快速有限集模型预测控制策略在跟踪参考电流、平衡中点电位方面具有良好的静、动态性能。
In order to speed up dynamic T-type three level photovoltaic grid-connected system response and avoid the problem of the large amount of online calculation of the prediction model and the cost function in the traditional finite set model-predictive control(FCS-MPC)the fast finite control set model-predictive control(FFCS-MPC)with PV power feedforward is proposed in αβ stationary coordinate. The output power of the PV array is introduced into the traditional voltage outer loop as the reference value of the current inner loop and with the thought of SVPWM the switch states close to the inverter output reference voltage vector just participate in online calculation and evaluation. The system simulation model is built in Matlab and compared with that without power feed-forward and conventional FCS-MPC. The simulation results show that the FFCS-MPC strategy with feed-forward has good static and dynamic performance in tracking the reference current and the neutral point potential balance matters.
作者
李亚宁
高晓红
Li Yaning;Gao Xiaohong(School of Automation and Electrical Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China)
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2019年第11期3062-3070,共9页
Acta Energiae Solaris Sinica
基金
甘肃省自然科学基金（1308RJZA199)
关键词
T型三电平逆变器
并网控制
中点电位平衡
功率前馈
模型预测控制
T-type three level inverter
grid connected control
neutral point potential balance
power feed-forward
model predictive control
