研究目的
To develop a high-performance shade-tolerant maximum power point tracking (STMPPT) technique for DC-DC converters in photovoltaic applications that is independent of shading conditions and PV array configuration, and can operate stably under dynamic environmental changes.
研究成果
The proposed STMPPT technique based on ACMC provides fast, reliable, and system-independent global maximum power point tracking under partial shading conditions. It reduces search space using I-V characteristics, operates stably under dynamic environmental changes, and requires no extra hardware beyond standard P&O methods. Experimental and simulation results confirm high efficiency and robustness, making it suitable for practical PV converter applications.
研究不足
The method may require careful tuning of parameters such as perturbation steps and update frequencies. It is designed for DC-DC boost converters and may need adaptation for other converter topologies. The dynamic performance depends on the response time of the control loops and the PV simulator's capabilities.
1：Experimental Design and Method Selection:
The study uses average current-mode control (ACMC) with a perturb and observe (P&O) MPPT algorithm. It operates in two modes: local MPPT (LMPPT) under normal irradiance and global MPPT (GMPPT) under partial shading. The GMPPT subroutine scans the PV profile using innovations based on I-V characteristics to reduce search space and improve tracking speed.
2：Sample Selection and Data Sources:
The PV array consists of series-connected PV modules (e.g., ET-M53695 monocrystalline modules) with bypass diodes. Simulations use Matlab/Simulink, and experiments use a real PV array and a programmable PV simulator (ITECH IT6517C).
3：List of Experimental Equipment and Materials:
DC-DC boost converter, PV array or simulator, battery pack, voltage and current sensors, Texas Instruments TMS320F28335 DSP, Code Composer Studio (CCS 7.0.0) for software development, and various PV modules (e.g., Canadian Solar CS6P-260P, ET-M53695).
4：0) for software development, and various PV modules (e.g., Canadian Solar CS6P-260P, ET-M53695).
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The control structure includes two feedback loops for voltage and current regulation. The MPPT algorithm updates reference voltage and current, with perturbations in current reference to move operating points. Simulations and tests are conducted under different partial shading conditions and dynamic irradiance changes as per EN50530 standard.
5：Data Analysis Methods:
Performance is assessed through simulation and experimental results, including tracking time, efficiency calculations (static and dynamic), and comparisons with other methods like PSO. Data is analyzed using power, voltage, and current waveforms.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
