Method and system for anti-power grid power supply

Abstract

The invention discloses a method for preventing reverse power supply of a power grid. The method comprises the steps that a reverse power supply prevention device is preset in the air; a ground connection portion is arranged in an insulation overhead line; the periphery of the ground connection portion is wrapped by a metal foil; adhesive tape is wound at the two ends of the metal foil and extends outwards, and the adhesive tape covers the metal foil ends and a cable sheath at the same time; a protection outer shell is arranged and completely covers the metal foil and the adhesive tape. The invention further discloses a system for preventing reverse power supply of the power grid, the system comprises the reverse power supply prevention device which comprises the open-close type protection outer shell, the adhesive tape and the metal foil, the metal foil wraps the periphery of the ground connection portion in use, the adhesive tape is wound at the two ends of the metal foil and covers the cable sheath outside the metal foil ends and the outer end of the ground connection portion in use, and the protection outer shell is arranged on the periphery of the ground connection portion in use, and completely covers the wrapped metal foil and the wound adhesive tape. The system is simple in structure, convenient to use, effective for a long term, good in safety and high in maintenance efficiency.

Description

technical field [0001] The invention relates to the technical field of electric power supply, in particular to a method and a system for preventing grid down and power supply. Background technique [0002] At present, when performing power grid maintenance, the power supply system in the area where the maintenance line is located is first shut down, and then the maintenance personnel work at heights to carry out maintenance without performing anti-falling power supply treatment. This method cannot guarantee the safety of construction personnel, because overhead cables It will inevitably be connected to the home, and some users (such as schools, shopping malls, factories, etc.) will install generators to ensure normal power supply during power outages without affecting the normal operation of electrical appliances. The phenomenon that the main line is still charged due to the overhead main line, if the construction personnel cut off the power supply system on the main line, w...

AI Technical Summary

Problems solved by technology

[0002] At present, when performing power grid maintenance, the power supply system in the area where the maintenance line is located is first shut down, and then the maintenance personnel work at heights to carry out maintenance without performing anti-falling power supply treatment. This method cannot guarantee the safety of construction personnel, because overhead cables It will inevitably be connected to the home, and some users (such as schools, shopping malls, factories, etc.) will install generators to ensure normal power supply during power outages without affecting the normal operation of electrical appliances. The phenomenon that the main line is still charged due to the overhead main line, if the construction personnel cut off the power supply system on the main line, without anti-falling power supply treatment, rashly carry out maintenance, there will be great safety hazards, Some maintenance personnel even did not perform grounding treatment at all in order to act efficiently, which threatened their lives and safety

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