SU521625A1 - High voltage switchgear - Google Patents

Description

The invention relates to the field of electrical engineering and can be used in the design and construction of electrical substations. It is intended to receive and distribute electrical energy in high voltage AC installations. Powerful high-voltage switchgears are subject to increased demands for reliability and uninterrupted power supply to consumers.

A high voltage switchgear is known, made according to a triangle with two power lines and one autotransformer with the possibility of switching to a quadrangle circuit with two lines and two autotransformers 1. However, when switching to a quadrilateral circuit in such a device cells and dismantling of descents require shutdown of the entire substation, which causes a break in the power supply to consumers and a significant undersupply of electricity.

It is also known a high voltage switchgear, made according to the four-square scheme and containing two autonomous, connected through disconnectors of section 2.

A disadvantage of this device is the impossibility of transitioning from one polygon connection scheme without interruption of power supply. To ensure uninterrupted supply

electricity from a triangle to a quadrilateral in the proposed device in the jumper circuit to switch to a quadrilateral from the triangle

disconnector.

FIG. 1 given the basic scheme for filling the device described by a triangle; in fig. 2 - Nlan open switchgear on the diagram of a quadrilateral; in fig. 3 is a section along A-A in FIG. 2; in fig. 4 is a section along BB in FIG. 2

The switchgear is made in the first stage in a triangle with two

lines and one autotransformer 1. The neremychka between the tires of one of the power lines and the tires of the second autotransformer 2, which is installed during the transition to the quadrilateral circuit, is connected not tightly, but

through the disconnector 3. The bus transformers of the installation are connected directly to the bus bars. During the transition from the triangle to the quadrilateral scheme, the operation of the substations is carried out without interruption of the power supply. Only for the time of connecting the ends of the wires from the equipment to the jumper and for the time of dismantling the descents at points C and D will require disconnection of the triangle circuit, but in this case the power transit is not disturbed and one autotransformer works, although the triangle is open on one side.

Thus, the scheme of the proposed device acquires greater flexibility and consistency, which allows drying, transition from the initial to a more advanced scheme while maintaining the transit of electrical energy and ensuring uninterrupted power to consumers.

In the triangle or quadrilateral circuit, the transit of electrical energy on the high voltage side, as well as the power supply of the autotransformers, is indicated. The occurrence of damage to any linear or transformer device causes the two nearest switches to open. Leaving the line in operation provides power to the intact part. When operating according to the delta scheme, the disconnectors 3 and 4 (see Fig. 1) are closed. Transfer switchgear to work on the scheme

the quadrangle is dried after the installation of the fourth branch (using a jumper) and the second autotransformer, which is performed without disrupting the operation of the distribution device in a triangle pattern.

Claims (2)

1. Typical project No. 1021ТМ, developed by the institute Energosetproekt in 1964, drawing No. 1021ТМ-76. 2. LI Dvoskin’s book, Layouts and Designs of High Voltage Switchgears, SEI, 1960, p. 213. Uj l .g. . (IH5 . S BUT: §3 T, / t Midrange "S / g. fc.3S 2 P J. J J llf iaj Mj; oi-PG / L . g ° GP T D5-