汽轮发电机定子单相接地故障检测方法、介质及设备
By obtaining the effective values of the three-phase ground wave and harmonic voltage of the steam turbine generator, and using the fault detection model to calculate the fault location, the problem of accurately locating the stator single-phase ground fault in a high-resistance grounding environment is solved, improving the location accuracy and identification accuracy.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- NANJING TECH UNIV
- Filing Date
- 2025-05-14
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies struggle to accurately identify the location of single-phase grounding faults in turbine generator stators under high-resistance grounding conditions, resulting in large positioning errors and a high misjudgment rate. Furthermore, they lack selectivity in multi-unit parallel operation modes, making it difficult to distinguish between faulty and healthy units.
By acquiring the effective values of the three-phase ground wave, the ground fault transition resistance, the neutral point third harmonic voltage, and the generator terminal third harmonic voltage of the faulty turbine generator, the effective fault location is calculated and screened using a pre-built fault detection model, eliminating phase influence and improving positioning accuracy.
It enables precise fault location in high-resistance grounding environments, reduces the false alarm rate, improves the accuracy and selectivity of fault identification, and meets the protection requirements under all operating conditions.
Smart Images
Figure CN120385951B_ABST