基于模型预测与复合占空比的双有源全桥变换器电压电流暂稳态调控方法  

Transient-and Steady-State Optimization of Voltage and Current for Dual Active Bridge Converters Based on Model Predictive Control and Composite Duty Modulation

作　　者：杨鸣[1] 汪小丰 司马文霞[1] 唐君豪 Yang Ming;Wang Xiaofeng;Sima Wenxia;Tang Junhao(State Key Laboratory of Power Transmission Equipment Technology Chongqing University,Chongqing 400044 China)

机构地区：[1]输变电装备技术全国重点实验室(重庆大学),重庆400044

出　　处：《电工技术学报》2025年第4期1203-1220,共18页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金面上资助项目(52377136)。

摘　　要：双有源全桥变换器是固态变压器的核心组件,其暂稳态调控策略目前多采用低自由度调制或弱动态调节控制,难以在全功率、宽电压转换比工作范围内实现电感电流和输出电压纹波的深度抑制,并造成暂态冲击恢复时间偏长,对固态变压器的安全可靠运行造成挑战。该文以构筑双有源全桥变换器的暂稳态调控策略为目标,研究适用于全范围调制设计和无电感电流传感器控制的双有源全桥变换器状态空间平均值模型,以全功率、宽电压转换比工作范围内深度抑制电感电流和输出电压纹波为突破口,提出基于模型预测与复合占空比的双有源全桥变换器电压电流暂稳态调控方法,揭示多场景多工况下不同调控策略的稳态特性及其输出负荷、输入电压、输出电压参考值突变下的动态响应特性,对所提调控策略进行对比验证,保障双有源全桥变换器在全功率、宽电压转换比工作范围下的安全高效运行。Because of excellent performance in electrical isolation,bidirectional energy flow,and soft switching,dual active bridge(DAB)converters are widely used in new energy grid connections,electric vehicles,and train traction.In the new power system,the types of source loads are diverse,and the DC bus voltage varies greatly,resulting in a mismatch between the input and output voltages of the DAB converter,high current stress,hard switching,and low system efficiency.Meanwhile,the high proportion of new energy makes the operating conditions of the new power system very complex,and various source load devices are frequently changed.Therefore,the DAB converter should have good steady-state and transient performance.Existing modulation and control methods are challenging in achieving suppression of inductor current and output voltage ripple and improving system dynamic performance over the full power and wide voltage conversion ratio range.This paper proposes a control method for DAB converters based on model predictive control(MPC)and composite duty modulation(CDM).Firstly,a state-space average model considering various harmonics is established to optimize system steady-state performance.Then,a state-space average model of output voltage is established to reduce the number of sensors in the closed-loop control.Secondly,a CDM method is proposed to optimize the steady-state performance of DAB converters.Then,the forward Euler method calculates differential terms,and the output voltage is predicted to construct a transient-and steady-state control strategy based on MPC and CDM.Finally,experiments are conducted to verify the proposed control strategy.The conclusions can be drawn as follows.(1)The state-space average model of DAB converters considering various harmonics can calculate inductor current and output voltage ripple,and high-frequency current information sampling can be avoided by eliminating the inductor current in the state-space equation.(2)The proposed control method can solve the problems of fundamental duty modu

关 键 词：固态变压器 双有源全桥变换器 稳态性能 动态性能 三重移相调制 

分 类 号：TM46[电气工程—电器]