研究目的
To resolve the issues of grid current distortion and slow dynamics under traditional droop control by proposing a novel seamless transfer scheme between islanded and grid-connected modes with unified control structure for single-stage photovoltaic inverter.
研究成果
The proposed seamless transfer scheme based on unified control structure for single-stage photovoltaic inverter effectively resolves the issues of grid current distortion and slow dynamics under traditional droop control. Simulation and experimental results verify the scheme's feasibility, showing great smooth transfer and fast dynamic performance.
研究不足
The proposed scheme's effectiveness is demonstrated through simulation and experimental results, but real-world application challenges such as varying grid conditions and scalability to larger systems are not addressed.
1：Experimental Design and Method Selection:
The proposed scheme is developed based on resistive droop control, suitable for parallel inverters system. It involves transforming conventional P/V droop equation to generate power reference by voltage amplitude and maintaining Q/f droop equation unchanged.
2：Sample Selection and Data Sources:
Simulation model built in Matlab/Simulink and experimental platform based on PLECS RT-BOX semi-physical simulation system.
3：List of Experimental Equipment and Materials:
DC source to simulate PV output, isolation transformer to isolate the inverter from the grid, and a 500Ω resistor as the load in islanded mode experiment.
4：Experimental Procedures and Operational Workflow:
The control strategy changes from islanded mode to grid-connected mode by pre-synchronizing the inverter, ensuring the output voltage is in phase with the grid.
5：Data Analysis Methods:
Simulation and experimental results are analyzed to verify the effectiveness of the proposed method in achieving seamless transfer with fast dynamic response and low sinusoidal distortion.
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
