Alternating-current energy consumption device in flexible direct-current project

Abstract

The invention relates to an energy consumption device in the flexible direct-current project, and especially relates to an alternating-current energy consumption device in the flexible direct-currentproject. The key points of the structure are that: three groups of energy consumption thyristor valves and energy consumption resistors are arranged in parallel in a valve hall and an outdoor field according to a three-phase connection sequence; three sets of wall-penetrating sleeves are arranged on the valve hall wall; and each set of sleeves comprises a wire inlet sleeve and a wire outlet sleevewhich are arranged in a high-low mode. The device also comprises three sets of wiring tubular buses and a set of wire return tubular buses. A complete angle type wiring scheme starting from any phaseis achieved by arranging the wall-penetrating sleeves distributed in a high-low mode, the wiring tubular buses and the wire return tubular buses . The device has the advantages that the angular wiring scheme can be formed by taking the GIS sleeve of any phase as a starting point, ordered and regular layout is realized, the flexibility is good, wiring is convenient, operation and maintenance are convenient, and the applicability is good.

Description

technical field [0001] The invention relates to an energy-consuming device in flexible straight engineering, in particular to an AC energy-consuming device in flexible straight engineering. Background technique [0002] The AC power consumption device is installed in the converter station at the sending end of the Rouzhi project to act on the balance of the AC side power grid in the island mode. The energy device consumes surplus power to ensure the normal operation of the sound pole, and then cuts off the fan. There are three wiring methods for AC energy consumption devices, including angle connection, star connection and star ungrounded connection. Among them, the angle connection can run for 2 hours when a single-phase fault occurs, and the equipment has high availability and the current of the valve group is small. The current stress on power electronic devices is small, so it is the preferred wiring scheme for design. However, angle junctions are difficult to implemen...

AI Technical Summary

Problems solved by technology

[0003] 1) In the angle-shaped wiring, the wiring of each phase is connected end-to-end, and the wiring between the equipment is relatively cumbersome. However, the space in the valve hall of the converter valve of the flexible straight project is limited, the layout is compact, and it is difficult for each equipment of the AC energy-consuming device to be within a safe distance. Therefore, it is necessary to set an irregular fixed arrangement for wiring. In this way, the starting end of the three phases is fixed and cannot be changed at will, thus losing flexibility

[0004] 2) AC energy-consuming devices include energy-consuming resistors and energy-consuming thyristor valves. Considering the applicability of the equipment, energy-consuming thyristor valves should be installed in the valve hall, while energy-consuming resistors should be installed outdoors, which further increases the wiring and equipment layout. difficulty

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