研究目的
To enhance power output from photovoltaic (PV) systems by reducing switching frequency voltage ripple using an interleaved boost converter, thereby minimizing power loss and allowing the use of longer lifespan capacitors like film capacitors instead of electrolytic capacitors.
研究成果
The interleaved boost converter significantly reduces voltage ripple by at least 75% compared to conventional boost converters, leading to enhanced power output and higher MPPT efficiency (up to 99.83%). This allows replacement of short-lifespan electrolytic capacitors with longer-lasting film capacitors, improving the overall system lifespan and efficiency, especially under low insolation conditions. Future work could explore higher phase numbers and cost-benefit analyses.
研究不足
The study assumes uniform insolation distribution, neglects series resistance of the PV module, and operates the converter in continuous conduction mode. It does not address implementation complexity or cost trade-offs for higher phase numbers beyond two phases. The use of specific PV modules (BP solarex) may limit generalizability.
1：Experimental Design and Method Selection:
The study uses an interleaved boost converter (IBC) to reduce voltage ripple in PV systems. Small-signal modeling and Fourier series analysis are employed to derive the first harmonic voltage ripple. The methodology includes mathematical analysis, simulations, and experimental validation.
2：Sample Selection and Data Sources:
A BP solarex PV module with 36 polycrystalline series-connected cells (Vmpp = 17.1 V, Impp = 3.5 A) is used. Different configurations (single module, series, parallel) are tested under varying insolation and temperature conditions.
3：1 V, Impp = 5 A) is used. Different configurations (single module, series, parallel) are tested under varying insolation and temperature conditions.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: Prototype IBC with inductance (350 mH), output capacitance (100 μF), no input capacitance. Equipment includes Agilent E4360 Solar Array Simulator (SAS), Agilent N3300A Electronic load, MSP430 (G2553) microcontroller for pulse generation.
4：Experimental Procedures and Operational Workflow:
The PV output is connected to the IBC input, and the converter output is connected to a constant 60 V DC bus. Switching frequency is set to 20 kHz. MPPT efficiency and ripple are measured under different cases (e.g., single module, series/parallel connections).
5：Data Analysis Methods:
Data is analyzed using derived mathematical models (e.g., Eq. 6-22 for ripple and power reduction), with results compared between conventional boost converter and IBC. Efficiency and ripple magnitudes are quantified.
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
