Fault point distance measurement method and device
CN115524574BActive Publication Date: 2025-12-09NR ELECTRIC CO LTD +1
Patent Information
- Application Number
- CN202110712605.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2021-06-25
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2041-06-25
Smart Images
Figure CN115524574B_ABST
Abstract
The application provides a fault point distance measurement method and device. The fault point distance measurement method comprises the following steps: calculating system impedance according to voltage and current variation before and after line fault at a protection point; calculating fault current distribution coefficient according to the system impedance and line impedance; calculating fault current component according to measured current before and after line fault; calculating fault point fault current according to the fault current distribution coefficient and the fault current component; obtaining a measurement impedance equation between the protection point and the fault point according to measured voltage and current; and calculating the distance between the fault point and the protection point according to the measurement impedance equation. The fault point distance measurement method according to the application can accurately calculate the fault current distribution coefficient and consider the influence of transition resistance and load current.
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Citation Information
Patent Citations
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