研究目的
To develop an efficient and cost-effective control scheme for the operation of grid integrated photovoltaic (PV) system under low voltage ride through (LVRT) condition, focusing on controlling the reactive power injection to stabilize the system and prevent the flow of over current during LVRT.
研究成果
The developed controller demonstrates effective performance in stabilizing the grid integrated PV system under LVRT conditions by modifying the switching gain to inject reactive power. The system's response is fast and seamless during transition mode, ensuring stability within stipulated time frames.
研究不足
The research is limited to a 4kW single phase grid connected PV system. The effectiveness of the proposed scheme in larger or three-phase systems is not explored.
1：Experimental Design and Method Selection:
The research focuses on controlling the switching of MPPT technique to regain voltage stability for the system under fault. An extra proportional controller is added to assist the droop characteristics of photovoltaic power voltage curve during fault conditions.
2：Sample Selection and Data Sources:
A 4kW grid integrated PV system is considered for simulation.
3：List of Experimental Equipment and Materials:
Solar panel (250W) × 8, Boost converter, Inverter, Filter, Single phase grid.
4：Experimental Procedures and Operational Workflow:
Simulation is performed to test LVRT conditions. The system's response is observed during transition mode.
5：Data Analysis Methods:
The performance of the developed controller is assessed based on its accuracy and response time under stipulated conditions.
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