新能源光伏逆变器能量转换控制系统
By leveraging the synergistic effect of virtual impedance generation and grid condition monitoring modules, the inductance component weight of the virtual impedance is dynamically adjusted, solving the problem of controller parameter mismatch in traditional photovoltaic inverters under weak grid conditions, and achieving stability and efficient energy conversion over a wide range.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- QINGDAO LINGFENG AUTOMATION ENG CO LTD
- Filing Date
- 2026-05-09
- Publication Date
- 2026-07-17
AI Technical Summary
Traditional photovoltaic inverter control systems lack the ability to adapt to changes in grid impedance under weak grid conditions, leading to controller parameter mismatch, deterioration of dynamic performance, and difficulty in maintaining stability over a wide range.
A virtual impedance generation module is used to generate a virtual impedance reference signal synchronized with the power grid. The power grid distortion rate and frequency fluctuation rate are monitored in real time by the power grid condition monitoring module. The inductance component weight of the virtual impedance is dynamically adjusted. Combined with the closed-loop control module, the switching drive signal is optimized to achieve adaptive energy conversion control.
This enhances the adaptive and stable operation capability and power output quality of photovoltaic inverters under complex grid conditions, ensuring that the system maintains stability and efficient operation when grid impedance changes.
Smart Images
Figure CN122159388B_ABST