A kind of sf6 gas insulated storage cabinet for ring network

Abstract

The invention belongs to the field of electrical equipment, and specifically to a novel SF6 gas-insulated PT cabinet for an annular power distribution network. The novel SF6 gas-insulated PT cabinet comprises a cabinet body, wherein a gas tank and a voltage transformer are mounted in the cabinet body; and the voltage transformer is electrically connected with the gas tank through a cable. According to the novel SF6 gas-insulated PT cabinet, the gas tank and the voltage transformer for supplying power to the gas tank are integrated into the same group of cabinet body, so that the miniaturization of the equipment is realized, and the space utilization ratio is improved; a gas releasing chamber and a cable chamber are independent structurally, so that the equipment in the cable chamber is not subjected to gas pressure impact when the gas tank is subjected to gas releasing protection; and in addition, a cable trench is formed below the cabinet body in a load-discharging direction, so that security threat on the site staff and equipment is minimum, and the security is greatly improved.

Description

technical field [0001] The invention belongs to the field of electrical cabinet equipment, and in particular relates to an SF6 gas-insulated PT cabinet for a ring network. Background technique [0002] The ring network refers to the ring distribution network, that is, the main power supply line forms a closed ring, and the power supply supplies power to the ring main line, and then distributes power from the main line through high-voltage switches one by one. The advantage of this is that each power distribution branch can get power from its left side main line, and can get power from its right side main line. When the left main fails, it continues to receive power from the right main, and when the right main fails, it continues to receive power from the left main, so that although the main power supply is single, But from each power distribution branch, it can get benefits similar to dual-circuit power supply, thereby improving the reliability of power supply. [0003] Th...

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Problems solved by technology

[0005] The existing ring network cabinet solution is to use C cabinet, which is the load switch cabinet, and the supporting PT cabinet, which is the voltage transformer cabinet, is used as a side cabinet to supply power to C cabinet, and the ring network cabinet gas tank (referred to as gas tank) used in the load switch cabinet , its lower end surface is stepped, and three connecting ends are set on the elevation of the ladder. The special shape makes the C cabinet occupy a large space, and because the gas box needs to be deflated when accidents such as maintenance, overload, and short circuit occur, its deflation The method is to introduce high-pressure gas into the cable trench under the cabinet through the cable room under the load switch cabinet, so the load switch cabinet takes up a large space and it is difficult to integrate the voltage transformer cabinet, resulting in a huge waste of space, and the cost of the two sets of cabinets It also remains high, which has brought certain troubles to the marketing of the ring main unit.

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