Abstract：Model predictive power control (MPPC) is based on the minimization principle of the cost function, which selects the optimal switching state to act on the system. However, the grid side current of the MPPC will be distorted seriously under unbalanced grid voltage conditions, which affects the output performance of PWM rectifier. To address this problem, the paper applies the new definition of extended reactive power to MPPC to obtain constant active power and grid-side sinusoidal current without power compensation algorithms. In addition, aiming at the problems of conventional MPPC (C-MPPC), such as variable switching frequency and large system computation, an optimized MPPC (O-MPPC) is proposed. By optimizing the finite control set, the system computation is reduced, and the selected vector switching sequence is reorganized for optimization and the action time of each vector is calculated by the multi-vector synthesis method. As a result, the problem of the unstable switching frequency of C-MPPC is solved, and the system control performance is enhanced. The feasibility and superiority of the proposed optimized control method are verified through comparative experiments with C-MPPC.
[1] 朱进权, 葛琼璇, 王晓新, 等. 基于自抗扰和负载功率前馈的高速磁悬浮系统PWM整流器控制策略[J]. 电工技术学报, 2021, 36(2): 320-329. Zhu Jinquan, Ge Qiongxuan, Wang Xiaoxin, et al.Control strategy for PWM rectifier of high-speed maglev based on active disturbance rejection control and load power feed-forward[J]. Transactions of China Electrotechnical Society, 2021, 36(2): 320-329. [2] Kulikowski K,Sikorski A.New DPC look-up table methods for three-level AC/DC converter[J]. IEEE Transactions on Industrial Electronics, 2016, 63(12): 7930-7938. [3] 李景灏, 吴爱国. 基于离散趋近律与无差拍双闭环结构的单相LCL型PWM整流器控制策略[J]. 电工技术学报, 2021, 36(6): 1290-1303. Li Jinghao, Wu Aiguo.A double closed-loop control method for single-phase PWM rectifiers with LCL filter based on discrete reaching law and dead- beat algorithm[J]. Transactions of China Electrotechnical Society, 2021, 36(6): 1290-1303. [4] 范必双, 谭冠政, 樊绍胜, 等. 一种具有双非零电压矢量输出的三电平PWM整流器直接功率控制方法[J]. 中国电机工程学报, 2015, 35(22): 5832-5841. Fan Bishuang, Tan Guanzheng, Fan Shaosheng, et al.A direct power control method for three-level PWM rectifier[J]. Proceedings of the CSEE, 2015, 35(22): 5832-5841. [5] 张辉, 李志新, 王涛, 等. 基于三矢量的三相PWM整流器低复杂性模型预测直接功率控制[J]. 电网技术, 2018, 42(3): 957-965. Zhang Hui, Li Zhixin, Wang Tao, et al.Three vectors based low complexity model predictive direct power control for three-phase PWM rectifier with output of double non-zero voltage vectors[J]. Power System Technology, 2018, 42(3): 957-965. [6] Zhang Yongchang, Jiao Jian, Liu Jie.Direct power control of PWM rectifiers with online inductance identification under unbalanced and distorted network conditions[J]. IEEE Transactions on Power Elec- tronics, 2019, 34(12): 12524-12537. [7] Vazquez S, Marquez A, Aguilera R, et al.Predictive optimal switching sequence direct power control for grid- connected power converters[J]. IEEE Transa- ctions on Industrial Electronics, 2015, 62(4): 2010-2020. [8] Zhang Yongchang, Xie Wei.Low complexity model predictive control-single vector-based approach[J]. IEEE Transactions on Power Electronics, 2014, 29(10): 5532-5541. [9] 魏新迟, 许利通, 骆仁松, 等. 考虑饱和效应的无刷双馈发电机功率模型预测控制[J]. 电工技术学报, 2021, 36(17): 3721-3729. Wei Xinchi, Xu Litong, Luo Rensong, et al.Model predictive power control of brushless doubly-fed induction generator considering saturation effect[J]. Transactions of China Electrotechnical Society, 2021, 36(17): 3721-3729. [10] 夏文婧, 刘碧, 王嵩, 等. 基于输入端电压动态分量优化的PWM整流器模型预测控制[J]. 电力系统自动化, 2020, 44(1): 200-207. Xia Wenjing, Liu Bi, Wang Song, et al.Model predictive control of PWM rectifiers based on dynamic component optimization of input-port voltage[J]. Auto- mation of Electric Power Systems, 2020, 44(1): 200-207. [11] Tao Yukun, Wu Qinghua, Wang Lei, et al.Voltage sensorless predictive direct power control of three- phase PWM converters[J]. IET Power Electronics, 2016, 9(5): 1009-1018. [12] Choi D K, Lee K B.Dynamic performance improve- ment of AC/DC converter using model predictive direct power control with finite control set[J]. IEEE Transactions on Industrial Electronics, 2015, 62(2): 757-767. [13] 叶虹志, 姜燕, 黄守道, 等. 电压型PWM整流器无差拍预测直接功率控制[J]. 电工技术学报, 2015, 30(4): 121-128. Ye Hongzhi, Jiang Yan, Huang Shoudao, et al.Deadbeat predictive direct power control for three phase voltage source PWM rectifiers[J]. Transactions of China Electrotechnical Society, 2015, 30(4): 121-128. [14] 杨美辉,周念成, 王强钢, 等. 基于分布式协同的双极直流微电网不平衡电压控制策略[J]. 电工技术学报, 2021, 36(3): 634-645. Yang Meihui, Zhou Niancheng, Wang Qianggang, et al.Unbalanced voltage control strategy of bipolar DC microgrid based on distributed cooperation[J]. Transa- ctions of China Electrotechnical Society, 2021, 36(3): 634-645. [15] Cheng Chenwen, Nian Heng.Low-complexity model predictive stator current control of DFIG under harmonic grid voltages[J]. IEEE Transactions on Energy Conversion, 2017, 32(3): 1072-1080. [16] Suh Y, Lipo T A.Control scheme in hybrid syn- chronous stationary frame for PWM AC/DC converter under generalized unbalanced operating conditions[J]. IEEE Transactions on Industry Applications, 2006, 42(3): 825-835. [17] 张永昌, 彭玉宾, 曲昌琦. 不平衡电网电压下的PWM整流器预测电流控制[J]. 电工技术学报, 2016, 31(4): 88-94, 103. Zhang Yongchang, Peng Yubin, Qu Changqi.Predi- ctive current control of PWM rectifier under unbalanced grid voltage condition[J]. Transactions of China Electrotechnical Society, 2016, 31(4): 88-94, 103. [18] Eloy-García J, Arnaltes S, Rodríguez-Amenedo J L. Direct power control of voltage source inverters with unbalanced grid voltages[J]. IET Power Electronics, 2008, 1(3): 395-407. [19] Yang Haitao, Zhang Yongchang, Liang Jiejunyi, et al.Robust deadbeat predictive power control with a discrete-time disturbance observer for PWM rectifiers under unbalanced grid conditions[J]. IEEE Transa- ctions on Power Electronics, 2019, 34(1): 287-300. [20] Yan Shuo, Chen Jie, Yang Tianbo, et al.Improving the performance of direct power control using duty cycle optimization[J]. IEEE Transactions on Power Electronics, 2019, 34(9): 9213-9223. [21] 肖蕙蕙, 苏新柱, 郭强, 等. 三相Vienna整流器无网压传感器预测电流控制策略[J]. 电工技术学报, 2021, 36(6): 1304-1312. Xiao Huihui, Su Xinzhu, Guo Qiang, et al.Predictive current control of three-phase Vienna rectifier without grid voltage sensors[J]. Transactions of China Elec- trotechnical Society, 2021, 36(6): 1304-1312. [22] 柳志飞, 杜贵平, 杜发达. 有限集模型预测控制在电力电子系统中的研究现状和发展趋势[J]. 电工技术学报, 2017, 32(22): 58-69. Liu Zhifei, Du Guiping, Du Fada.Research status and development trend of finite control set model predictive control in power electronics[J]. Transa- ctions of China Electrotechnical Society, 2017, 32(22): 58-69. [23] Yan Shuo, Chen Jie, Tan S C, et al.A new geometric vector optimization of predictive direct power control[J]. IEEE Transactions on Power Electronics, 2020, 35(5): 5427-5436. [24] Cortes P, Rodriguez J, Silva C, et al.Delay com- pensation in model predictive current control of a three-phase inverter[J]. IEEE Transactions on Indu- strial Electronics, 2012, 59(2): 1323-1325.
2022, Vol. 37 
