一种输入缺相检测方法、装置及介质
By employing an input phase loss detection circuit in the thin-film capacitor system, the phase loss state can be quickly determined, solving the protection problem of the thin-film capacitor system during power failure, avoiding bus voltage oscillation and misjudgment, and improving the safety and reliability of the system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- WOLONG ELECTRIC GRP CO LTD
- Filing Date
- 2023-02-21
- Publication Date
- 2026-07-17
AI Technical Summary
In existing technologies, thin-film capacitor systems react slowly during phase loss detection, which can easily lead to sudden power outages, rapid bus surge damage to power modules, and incorrect frequency calculations during grid distortion, resulting in misjudgments.
An input phase loss detection circuit is adopted. By obtaining the minimum voltage value of the three-phase line input voltage, it is determined whether the difference is greater than the preset difference value. The intermediate value is obtained as the threshold value. Based on the threshold value and the real-time output voltage, it is determined whether there is a phase loss, thus avoiding periodic detection.
It enables rapid phase loss detection across the entire voltage range, preventing bus voltage oscillation in thin-film capacitor systems during power outages, avoiding damage to power modules, and offering strong applicability while avoiding misjudgments caused by grid distortion.
Smart Images
Figure CN116298559B_ABST