一种永磁同步发电机匝间短路故障鲁棒检测方法
By utilizing the second harmonic ratio of the DC side voltage and the weighting method of q-axis current and voltage in a permanent magnet synchronous generator, the robustness problem of inter-turn short-circuit fault detection under varying regulator bandwidth was solved, achieving efficient and accurate fault detection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HEBEI UNIV OF TECH
- Filing Date
- 2022-10-21
- Publication Date
- 2026-07-17
AI Technical Summary
Existing inter-turn short-circuit fault detection methods for permanent magnet synchronous generators fail to effectively consider the influence of regulator bandwidth in closed-loop control systems, resulting in unrobust detection results, especially when the bandwidth of current and voltage regulators changes.
The ratio of the second harmonic of the DC-side voltage before and after the fault is used as a robust detection index. Combined with the second harmonic weighting method of q-axis current, q-axis voltage and DC-side voltage, the fault detection index is calculated online to adapt to changes in the bandwidth of the current and voltage regulators.
It achieves reliable detection of inter-turn short-circuit faults under different regulator bandwidths, and has the advantages of low computational load and low storage requirements, thus improving the detection accuracy and robustness.
Smart Images
Figure CN115656871B_ABST