具有绝缘监测的后备电源充放电系统及风电变桨驱动器
By introducing a balanced quasi-resonant step-down converter unit and a phase balance detection unit into the wind turbine pitch drive, insulation monitoring of the backup power supply is achieved, solving the problem of safe shutdown caused by insulation faults and improving the safety and reliability of the system.
CN115021374BActive Publication Date: 2026-07-17CRRC QINGDAO SIFANG ROLLING STOCK RESEARCH INSTITUTE CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CRRC QINGDAO SIFANG ROLLING STOCK RESEARCH INSTITUTE CO LTD
- Filing Date
- 2022-07-14
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
Existing wind turbine pitch drives lack effective backup power insulation monitoring capabilities, which prevents safe shutdown in the event of an insulation failure, posing a safety hazard.
Method used
The system employs a balanced quasi-resonant step-down converter unit and a phase balance detection unit to monitor the voltage balance between the backup power supply and the DC bus in real time, thereby achieving insulation monitoring and interrupting charging in case of a fault.
Benefits of technology
The power density of the pitch drive is increased, ensuring the safe and reliable operation of the backup power system, preventing the wind turbine from failing to shut down safely due to insulation failure, and ensuring the safe operation of the wind turbine.
✦ Generated by Eureka AI based on patent content.
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Figure CN115021374B_ABST
Abstract
本发明公开了一种具有绝缘监测的后备电源充放电系统及风电变桨驱动器,后备电源充放电系统包括：平衡准谐振降压变换单元及相平衡检测单元；平衡准谐振降压变换单元电性连接于风电变桨驱动器的内部直流母线及后备电源系统，平衡准谐振降压变换单元从内部直流母线取电对后备电源系统进行充电，同时根据后备电源系统的实时电压值调节充电模式；相平衡检测单元实时对后备电源系统进行绝缘监测，若后备电源系统存在绝缘故障时则输出关断信号至平衡准谐振降压变换单元中断充电，通过本发明保证了后备电源系统安全可靠运行以及变桨驱动器不在后备电源系统故障状态下充放电。
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