Hot-line work fault safety disposal system and method based on voltage change rate

The invention discloses a hot-line work fault safety disposal system based on a voltage change rate, and the system timely detects the abnormal change of the voltage of a practical training line through voltage sensing, change rate detection and fault discrimination, rapidly judges the fault type, and protects an electric power system. The selectivity and sensitivity of protection actions are improved, the system adopts corresponding protection measures in a targeted manner by distinguishing different types of faults, and meanwhile, the protection sensitivity is improved by setting a reasonable voltage change rate threshold value; electromagnetic isolation and photoelectric isolation technologies are adopted, the stability and reliability of a protection system are improved, and an isolation unit can block fault diffusion and avoid misoperation; accurate detection and quick response to voltage change of a practical training line are realized, and the safety and reliability of practical training are greatly im