基于有限控制集模型预测控制的全直流风电系统电压稳定控制  

Voltage stabilization control of all DC wind power systems based on finite control set-model predictive control

作　　者：马智 蔺红[1] 樊艳芳[1] Ma Zhi;Lin Hong;Fan Yanfang(School of Electrical Engineering,Xinjiang University,Urumqi 830049,China)

机构地区：[1]新疆大学电气工程学院,新疆乌鲁木齐830049

出　　处：《可再生能源》2025年第4期534-541,共8页Renewable Energy Resources

基　　金：国家重点研发计划项目(2021YFB1507000);新疆维吾尔自治区重点研发专项资助项目(2022B01020-3)。

摘　　要：为保证全直流风电系统安全并网运行,系统直流电压稳定控制至关重要。全直流风电系统直流电压稳定控制采用比例积分(PI)控制时,PI参数较多且整定繁琐复杂,在非正常运行工况下动态响应速度相对较慢,控制精度不够高。针对以上问题,文章提出一种基于有限控制集模型预测控制(Finite Control Set-Model Predictive Control,FCS-MPC)原理对系统换流器桥臂晶体管开关状态进行控制的系统直流电压稳定控制策略。该策略结合机侧整流器及并网逆变器的电流预测模型,以换流器输出电流为控制变量构造代价函数,以代价函数为优化目标,为避免计算时延导致的控制延时,引入延时补偿提高控制准确度,并引入权重系数实现多目标优化,通过遍历计算产生最优开关组合信号触发换流器。在Matlab/Simulink中建立全直流风电系统的仿真模型,在不同工况下,对所提策略与传统PI控制进行对比仿真分析,仿真结果有效验证了所提控制策略的静态性能及动态性能。In order to ensure the safe grid-connected operation of all DC wind power system,the system voltage stability control is crucial.At present,when the DC voltage stability control of all DC wind power system adopts the proportional-integral(PI)control,the dynamic response speed is relatively slow under the non-normal operation condition,the control accuracy is not high enough,and the PI parameter is more and more cumbersome and complicated to be calibrated.To address the above problems,this paper proposes a system DC voltage stabilization control strategy based on the principle of Finite Control Set-Model Predictive Control(FCS-MPC)to control the switching state of transistors of bridge arms of the system converter.The strategy combines the current prediction models of machine-side rectifiers and grid-connected inverters,constructs a cost function with the output current of the converter as the control variable,takes the cost function as the optimization objective,introduces the delay compensation to improve the control accuracy in order to avoid the control delay caused by the computational delay,and introduces the weight coefficients to realize the multi-objective optimization,and generates the optimal switching combinations of the signals to trigger the converter through the traversal calculation,In this paper,the simulation model of all DC wind power system is established in Matlab/Simulink,and the proposed strategy is compared with the traditional PI control in different working conditions,and the simulation results effectively verify the static and dynamic performance of the proposed control strategy.

关 键 词：全直流风电系统 有限控制集模型预测控制 电压稳定控制 换流器 风电并网 

分 类 号：TK81[动力工程及工程热物理—流体机械及工程] TM466[电气工程—电器]