Abstract：Boost converters are widely used for photovoltaic power generation, energy storage and electric vehicles. However, since the right half plane of the Boost converter is zero in the frequency domain, traditional PI control algorithms for the converter have serious dynamic response limitations which can result in large output voltage fluctuations leading to over or under voltage faults during fast transitions with large load changes. Predictive control can improve the dynamic response and avoid control parameter tuning with additive system constraints, but predictive control can lead to output voltage errors at steady state. A load-current sensorless sliding-mode-predictive control algorithm was developed here to reduce the output voltage fluctuations during sudden load transitions while also maintaining the proper steady-state characteristics. The outer loop uses a sliding surface to generate the inductor current reference while the inner loop with a deadbeat predictive control regulates the inductor current. The load current is estimated by a sliding mode observer. This control algorithm reduces the output voltage fluctuations during load transitions and the transition times. The algorithm also limits the output voltage errors at steady state. In addition, the algorithm does not require a load current sensor. Tests with a Boost converter confirm the effectiveness of this control strategy.
 YAO C, RUAN X B, CAO W J, et al. A two-mode control scheme with input voltage feed-forward for the two-switch Buck-Boost DC-DC converter[J]. IEEE Transactions on Power Electronics, 2014, 29(4):2037-2048.  OUCHERIAH S, GUO L. PWM-based adaptive sliding-mode control for Boost DC-DC converters[J]. IEEE Transactions on Industrial Electronics, 2013, 60(8):3291-3294.  PANDEY S K, PATIL S L, PHADKE S B. Comment on "PWM-based adaptive sliding-mode control for Boost DC-DC converters"[J]. IEEE Transactions on Industrial Electronics, 2018, 65(6):5078-5080.  GE J J, YUAN L Q, ZHAO Z M. Energy-balance based prediction for Boost converters[J]. 2016 IEEE 8th International Power Electronics and Motion Control Conference (IPEMC-ECCE ASIA). Hefei, China:IEEE, 2016:1190-1194.  SHI B Q, ZHAO Z M, LI J, et al. Energy balanced design and control for converters with natural trajectory tracking[C]//International Conference on Electrical Machines and Systems (ICEMS). Sydney, Australia:IEEE, 2017:1-5.  NAIM R, WEISS G, BENYAAKOV S S. H-infinity control applied to Boost power converters[J]. IEEE Transactions on Power Electronics, 1997, 12(4):677-683.  KARAMANAKOS P, GEYER T, MANIAS S. Direct model predictive current control strategy of DC-DC Boost converters[J]. IEEE Journal of Emerging and Selected Topics in Power Electronics, 2013, 1(4):337-346.  KARAMANAKOS P, GEYER T, MANIAS S. Direct voltage control of DC-DC Boost converters using enumeration-based model predictive control[J]. IEEE Transactions on Power Electronics, 2014, 29(2):968-978.  OETTMEIER F M, NEELY J, PEKAREK S, et al. MPC of switching in a Boost converter using a hybrid state model with a sliding mode observer[J]. IEEE Transactions on Industrial Electronics, 2009, 56(9):3453-3466.  ZHANG Y C, XIE W, LI Z X, et al. Model predictive direct power control of a PWM rectifier with duty cycle optimization[J]. IEEE Transactions on Power Electronics, 2013, 28(11):5343-5351.  ZHANG Y, PENG Y B, YANG H T. Performance improvement of two-vectors-based model predictive control of PWM rectifier[J]. IEEE Transactions on Power Electronics, 2016, 31(8):6016-6030.  YANG H T, ZHANG Y C, LIANG J J Y, et al. Sliding-mode observer based voltage-sensorless model predictive power control of PWM rectifier under unbalanced grid conditions[J]. IEEE Transactions on Industrial Electronics, 2018, 65(7):5550-5560.  BECCUTI A G, MARIETHOZ S, CLIQUENNOIS S, et al. Explicit model predictive control of DC-DC switched-mode power supplies with extended Kalman filtering[J]. IEEE Transactions on Industrial Electronics, 2009, 56(6):1864-1874.  CHEN J Q, PRODIC A, ERICKSON R W, et al. Predictive digital current programmed control[J]. IEEE Transactions on Power Electronics, 2003, 18(12):411-419.  MATTAVELLI P, SPIAZZI G, TENTI P. Predictive digital control of power factor preregulators with input voltage estimation using disturbance observers[J]. IEEE Transactions on Power Electronics, 2005, 20(1):140-147.  BUSO S, CALDOGNETTO T, BRANDAO D I. Dead-beat current controller for voltage-source converters with improved large-signal response[J]. IEEE Transactions on Industry Applications, 2016, 52(2):1588-1596.  KELLY A, RINNE K. Sensorless current-mode control of a digital dead-beat DC-DC converter[C]//Annual IEEE Conference on Applied Power Electronics Conference and Exposition (APEC). New York, USA:IEEE, 2004:1790-1795.  CHENG L, ACUNA P, AGUILERA R P, et al. Model predictive control for DC-DC Boost converters with reduced-prediction horizon and constant switching frequency[J]. IEEE Transactions on Power Electronics, 2018, 33(10):9064-9075.  SAGGINI S, STEFANUTTI W, TEDESCHI E, et al. Digital deadbeat control tuning for DC-DC converters using error correlation[J]. IEEE Transactions on Power Electronics, 2007, 22(4):1566-1570.  贾志东, 姜久春, 程龙, 等. 适用于Boost变换器的自适应模型预测控制算法[J]. 中国电机工程学报, 2018, 38(19):5838-5845.JIA Z D, JIANG J C, CHENG L, et al. An adaptive model predictive control for DC-DC Boost converters[J]. Proceedings of the CSEE, 2018, 38(19):5838-5845. (in Chinese)