Transfer type grounding line selection device suitable for three sections of buses and working method of transfer type grounding line selection device
By designing a transfer-type grounding line selection device suitable for three-stage busbars, using components such as separate grounding switches, zero-sequence current transformers and voltage transformers, the grounding line and transfer busbar are accurately selected after the inverted busbar is run, solving the problem of inaccurate grounding fault handling in the existing technology and improving the power supply reliability of the power grid.
Patent Information
- Application Number
- CN202510226498.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-27
- Publication Date
- 2025-06-20
AI Technical Summary
In the power grid structure of three-stage busbars, it is difficult for the prior art to accurately select the grounding line and transfer busbar after the inverted busbar is running, resulting in inaccurate grounding fault handling and prone to short-circuit blasting accidents in electrical equipment.
A transfer-type grounding wire selection device suitable for three-stage busbars is designed, including a phase-divided grounding switch, a high-voltage cable, a zero-sequence current transformer, a voltage transformer, a current input module and a voltage input module. Through the cooperation of these components, real-time monitoring and comparison of grounding current and voltage can be achieved, and the grounding circuit and transfer busbar are accurately judged.
In complex operation mode, the device improves the accuracy of grounding wire selection, avoids the occurrence of wrong busbars and lines when grounding, reduces the number of back-off operations, suppresses arc grounding overvoltage, reduces the probability of phase-to-phase short circuit accidents, and improves the reliability of power supply.