Single phase earth fault
1 Hazard to Substation Equipment After a single-phase earth fault occurs in the power distribution line, if the substation bus runs for a long time, the voltage transformer will be destroyed. Caused equipment damage and large-scale blackouts. After a single-phase earth fault occurs, a resonant overvoltage may also be generated, resulting in a resonant overvoltage several times that of a normal voltage, which endangers the insulation of the transformation equipment. In severe cases, the insulation breakdown of the transformation equipment results in a greater accident.
2. Hazards to power distribution equipment After a single-phase ground fault occurs, intermittent arc grounding may occur, resulting in a resonant overvoltage, resulting in an overvoltage several times that of the normal voltage. The overvoltage will further insulate the insulator on the line. Severe short-circuit accidents may occur, and some distribution transformers may be burned at the same time, so that the lightning arresters and fuses on the line are broken down and burned, and electrical fires may also occur.
3. The hazards to the distribution network may damage the stability of the regional power grid system and cause even greater accidents.
4. Harm to humans and animals For single-phase earth faults such as wire landing, if the grounded distribution line is not stopped, personal injury may occur to pedestrians and circuit patrols (especially at night). There may also be electric shocks to livestock. ACCIDENT.
5. Impact on power supply reliability After a single-phase-to-ground fault occurs, the power distribution line to be faulted on the one hand must be powered off, interrupt normal power supply, affect reliability of the power supply, and on the other hand, a single-phase grounded power distribution line will be shut down. In the search for failure points and elimination of faults, it is impossible to ensure normal power usage by users, especially in harsh climate conditions such as crop growth, wind, rain, and snow, and in mountainous and forested areas and other complex areas and at night, which is not conducive to finding and eliminating faults. This will cause long-term, large-scale power outages, which will have a major impact on power supply reliability.
7 Impact on the line loss When a single-phase earth fault occurs, the grounding phase of the distribution line directly or indirectly discharges to the earth, which will cause a large power loss. If it is operated for a period of time (not more than 2 hours) according to the regulations, it will result in More power loss. It also caused a lot of economic losses.
1 Hazard to Substation Equipment After a single-phase earth fault occurs in the power distribution line, if the substation bus runs for a long time, the voltage transformer will be destroyed. Caused equipment damage and large-scale blackouts. After a single-phase earth fault occurs, a resonant overvoltage may also be generated, resulting in a resonant overvoltage several times that of a normal voltage, which endangers the insulation of the transformation equipment. In severe cases, the insulation breakdown of the transformation equipment results in a greater accident.
2. Hazards to power distribution equipment After a single-phase ground fault occurs, intermittent arc grounding may occur, resulting in a resonant overvoltage, resulting in an overvoltage several times that of the normal voltage. The overvoltage will further insulate the insulator on the line. Severe short-circuit accidents may occur, and some distribution transformers may be burned at the same time, so that the lightning arresters and fuses on the line are broken down and burned, and electrical fires may also occur.
3. The hazards to the distribution network may damage the stability of the regional power grid system and cause even greater accidents.
4. Harm to humans and animals For single-phase earth faults such as wire landing, if the grounded distribution line is not stopped, personal injury may occur to pedestrians and circuit patrols (especially at night). There may also be electric shocks to livestock. ACCIDENT.
5. Impact on power supply reliability After a single-phase-to-ground fault occurs, the power distribution line to be faulted on the one hand must be powered off, interrupt normal power supply, affect reliability of the power supply, and on the other hand, a single-phase grounded power distribution line will be shut down. In the search for failure points and elimination of faults, it is impossible to ensure normal power usage by users, especially in harsh climate conditions such as crop growth, wind, rain, and snow, and in mountainous and forested areas and other complex areas and at night, which is not conducive to finding and eliminating faults. This will cause long-term, large-scale power outages, which will have a major impact on power supply reliability.
7 Impact on the line loss When a single-phase earth fault occurs, the grounding phase of the distribution line directly or indirectly discharges to the earth, which will cause a large power loss. If it is operated for a period of time (not more than 2 hours) according to the regulations, it will result in More power loss. It also caused a lot of economic losses.
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