SU502444A1 - Switchgear high voltage g.kolenovenko - Google Patents

Description

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The invention relates to the field of power supply and can be used to transfer powerful consumers of electrical energy to a backup supply line in order to reduce the downtime of these consumers during preventive maintenance, testing or accidents on any of the elements of the supply lines.

High-voltage switchgears are known for supplying powerful consumers of electrical energy, which contain one partitioned shida system, in which supply lines are connected to each section or to the extreme sections through switching equipment. The number of sections of such high-voltage switchgear is equal to the number of consumers.

However, the known devices, with all their positive qualities, have the disadvantage that during the period of conducting preventive repairs, testing or eliminating accidents on elements of any of the supply lines, the consumer is powered by this line using a high-voltage breaker to a nearby section from which another consumer is already receiving food. In this connection, if the supply lines are rated for the rated current of only one consumer, the performance of two

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Consumers connected to one such supply line, as a rule, are more than halved and often lead to a sharp decline in the quality and even rejects of the manufactured products. If each power line is designed for the rated current of two consumers, the capital costs and operating costs for the maintenance of all power lines and high-voltage switchgear almost double.

In addition, the applied circuit, despite the presence of a large number of high-voltage circuit breakers, is not flexible enough, since with separate power supply, each supply line can only be connected to one section of a high-voltage switchgear.

The purpose of the invention is to improve the reliability of power supply to powerful consumers of electrical energy, increase the number of hours of their work and increase the flexibility of the circuit. The application of the invention eliminates the need to install sectional high-voltage switches and ensures the nominal load of all consumers when repairing, testing or eliminating the accident on any element of one of the supply lines.

This is achieved in that only two supply lines are connected to sections of the high voltage distribution device using a single high voltage switch. All other supply lines are connected to each two adjacent sections of the field through switching devices. Each of the supply lines is designed for the rated load current of one section of a high-voltage switchgear. Due to the fact that electrothermal installations connected to high-voltage sections. switchgear, the same at rated power, the parameters of all supply lines are also the same.

If a high-voltage switchgear consists of n sections, then it is supplied with power lines, which are connected to the high-voltage switchgear using high-voltage switches, if electrothermal installations do not allow even short interruptions in the power supply and using high-voltage disconnectors, if the consumers of electric power connected to a high-voltage switchgear, allow interruption in the supply of electrical energy d 0.5-1.0 hours.

The invention is illustrated in the drawing, which shows a variant of a high-voltage switchgear having one system of women and consisting of Four sections, which are connected to the supply lines by means of high-voltage switches.

In the drawing, the following notation is accepted: 1-4 - busbars of sections of high-voltage switchgear; 5-9 - feeding lipies; 10 - busbars of the main step-down substation; 11-23 - high-voltage switches.

The high voltage switchgear operates as follows. During normal operation of all elements of the circuit from the busbars 10 of the main step-down substation, the power supply of section 1 of the high-voltage switchgear is carried out via the power line 5 through high-voltage switches 11 and 19; power supply section 2 - on the supply line 6 through the high-voltage switches 13 and 20; power supply section 3 - on the supply line 8 through | high-voltage switches 16 and 22; the power supply of section 4 is via power line 9 through high-voltage switches 18 and 23. One of the power lines, in this case power line 7, is in reserve. During the repair, testing or accident of any of the elements of one of the supply lines, for example, the supply line 5, the power supply of section 1 is carried out via the supply line 6 via high-voltage switches 12 and 20; power supply of section 2 - via supply line 7 through high-voltage switches 14 and 21; power supply of section 3 - via supply line 8

0 through high-voltage switches 16 and 22;

power supply section 4 - on the supply

line 9 through high voltage circuit breakers

18 and 23.

By repairing, testing or

5 accidents on any of the elements of the supply line 6; the power supply of section 1 is carried out via the supply line 5 through high-voltage switches 11 and 19; power supply of section 2 - via supply line 7 through

0 high-voltage switches 14 and 21; power supply of section 3 - software supply line 8 through high-voltage switches 16 and 22; power supply of section 4 - via supply line 9 through high-voltage switches 18 and 23.

Claims (1)

Invention Formula A high voltage switchgear containing one partitioned busbar system, to the extreme sections of which supply lines are connected through switching equipment, characterized in that, in order to increase the reliability and flexibility of the circuit, the rest are powered the lines are connected to each two adjacent bus sections via switching devices. 17 T /; g 7JJA Lj lj X 1. 17 L. h.s / fi 1/713 Lj Iff L U5 z 27