研究目的
To propose a novel non-PLL direct power control strategy for single-phase H-bridge SVPWM photovoltaic inverters to overcome the complexity and accuracy issues associated with PLL-based controllers.
研究成果
The proposed non-PLL direct power control strategy for single-phase H-bridge SVPWM photovoltaic inverters demonstrates robustness in accurately controlling voltage stability and regulating output power to meet grid demand. The method shows potential for extension to three-phase systems.
研究不足
The study focuses on single-phase H-bridge PV inverters and may not directly apply to three-phase systems without further research.
1：Experimental Design and Method Selection:
The study introduces a novel non-PLL control strategy for single-phase H-bridge PV inverters, utilizing DPC-PI controllers to control inverter voltage and active and reactive power without a PLL.
2：Sample Selection and Data Sources:
The Canadian solar panel, CS6X-310P, is used as the solar energy source, with one parallel and three series PV arrays.
3：List of Experimental Equipment and Materials:
Single-phase H-bridge inverter, LC low-pass-filter, DC-link capacitors C1 and C2, and the SVPWM algorithm.
4：Experimental Procedures and Operational Workflow:
The strategy calculates instantaneous real and reactive power using voltage and current components with specific frequencies, integrates an MPPT technique, and uses the SVPWM algorithm to control the inverter switches.
5：Data Analysis Methods:
Simulation results under varying conditions of ambient temperature and solar irradiance are analyzed to demonstrate the effectiveness of the proposed strategy.
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