Sectionalized high-voltage enclosed bus of energy saving and environmental protection type

Abstract

The invention discloses a sectionalized high-voltage enclosed bus of an energy saving and environmental protection type, which comprises an enclosure and three busbars, wherein the three busbars are uniformly fixed in the enclosure, and the peripheries of the busbars are respectively and fixedly provided with an insulating sheath; and the peripheries of the insulating sheaths are fixedly providedwith corresponding electromagnetic shielding layers, and the electromagnetic shielding layers are fixedly laid on the peripheries of the insulating sheaths by adopting a mode of disconnecting a closed loop circuit. The peripheries of the insulating sheaths are fixedly provided with the corresponding electromagnetic shielding layers, the electromagnetic shielding layers are fixedly laid on the peripheries of the insulating sheaths by adopting the mode of disconnecting the closed loop circuit, and thus electromagnetic pollution to surrounding environment can be relieved, the generation of a circulating current is avoided and the security of the bus is enhanced.

Description

technical field [0001] The invention relates to a closed busbar, in particular to a high-voltage closed busbar, which belongs to the technical field of power transmission equipment. Background technique [0002] With the rapid development of the power system, there are more and more power transmission and distribution methods using power cables. The increase in power cable lines leads to a sharp increase in the capacitive current of the system. When grounding, the arc cannot be extinguished due to excessive capacitive current, and the overvoltage caused by the intermittent arc grounding will pose a serious threat to the insulation of the equipment and the safe operation of the power grid. Modern power transmission and distribution lines basically have two types: overhead power lines and power cable lines. Restricted by the location of the ground, it is not allowed to erect towers and overhead lines; and in some severely polluted areas or national defense military projects to...

AI Technical Summary

Problems solved by technology

[0002] With the rapid development of the power system, there are more and more power transmission and distribution methods using power cables. The increase in power cable lines leads to a sharp increase in the capacitive current of the system. When grounding, the arc cannot be extinguished due to excessive capacitive current, and the overvoltage caused by intermittent arc grounding will pose a serious threat to the insulation of the equipment and the safe operation of the power grid.

Modern power transmission and distribution lines basically have two types: overhead power lines and power cable lines. Restricted by the location of the ground, it is not allowed to erect towers and overhead lines; and in some severely polluted areas or national defense military projects to avoid exposure and other areas, it is necessary to use the power transmission and distribution method of power cable lines. Take the 10KV system as an example, 1km The capacitive current of the power cable line is about 30 times that of the overhead power line. A large number of power cables will inevitably cause a sharp increase in the capacitive current of the system. The 6-66KV power grid in my country uses a neutral point ungrounded system. When there is one-way grounding No tripping is allowed in the event of a fault, and the system can continue to run for 2 hours. Excessive capacitive current makes the arc caused by the grounding short circuit unable to be extinguished, and the overvoltage caused by the intermittent arc grounding poses a serious threat to the insulation of the equipment and the safe operation of the power grid.

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