Experiments under different conditions have been implemented on a laboratory prototype to validate the correctness and effectiveness of the proposed SA-TPS control method. The operating mode selection principle and the regularities of minimization results varying with transmission power and voltage conversion ratio have been explored. The mathematical derivation process of SA-TPS control method is detailed described, and the analytical expressions of current stress minimization results as a function of voltage conversion ratio and transmission power have been derived by solving the forward and reverse power transmission process, respectively. On the basis of the analytical expressions of transmission power and current stress in different modes, the current stress minimization issue was transferred to inequality constraints problems in different operating modes.
LINK UNFOLDER FULL
The full model of DAB with TPS control was classified into 12 operating modes by a complete operating mode classification method. Triple phase shift (TPS) control can minimize the current stress to the utmost extent, and a segmented analytical method based TPS (SA-TPS) control has been proposed in this paper to minimize the current stress of DAB within the whole operating range. Experimental results for the proposed scheme are presented and compared with that of existing IRPT and SRFT detection methods in the literature.Ĭurrent stress minimization is one of the most important challenges for the steady-state researches of dual active bridge DC-DC converter (DAB). The effectiveness of the proposed algorithm is validated using both simulation and experimental results for a 1.1 kW rated system. Since the compensation mode (DC-AC) and rectification mode (AC-DC) of converter are decoupled and regulated separately, the four-leg converter operation with fast dynamic response, robust performance, and flexible controllability is achieved. The reference rectification currents are generated using an outer-loop DC-link voltage controller (PI) and are synchronized to the three-phase voltages. The first integrator is adopted to extract required reference compensation currents for power quality improvement and the second one is to decouple compensation currents and rectification currents of the converter side.
Thus, a novel control algorithm using double reduced-order generalized integrators (DROGI) for a four-leg shunt converter is presented in this paper. However, its conventional control algorithms based on instantaneous reactive power theory (IRPT) and synchronous reference frame theory (SRFT) have relatively slow dynamic response and unstable operation during transient conditions. In three-phase four-wire systems, four-leg converter has been an attractive solution for mitigating power quality problems, such as reactive power compensation, load balancing, neutral current reduction, etc. Finally, to improve both steady state and transient performances, a combination approach to optimize both efficiency and dynamics for NSDAB dc-dc converter based on the reviewed methods is presented in this paper.
For both the efficient and dynamic optimizations, thorough comparisons and recommendations are provided in this paper. Moreover, a review of optimized techniques for dynamic responses is also provided. Then, an overview of steady-state efficiency optimization strategies is discussed for NSDAB dc-dc converter.
All possible phase-shift patterns are demonstrated, and the correlation analysis of the typical phases-shift modulation methods for NSDAB dc-dc converter is presented. Firstly, the modulation strategies for NSDAB dc-dc converter are analyzed. The aim of this paper is to review and compare these recent state-of-the-art modulation and control strategies. Over the past few years, significant research has been carried out to address the technical challenges associated with modulations and controls of NSDAB dc-dc converter. The non-resonant single-phase dual-active-bridge (NSDAB) dc-dc converter has been increasingly adopted for isolated dc-dc power conversion systems.
0 kommentar(er)
