RU2474911C1 - Device to supply and distribute electric energy at intermediate traction power plants - Google Patents

Abstract

FIELD: electricity.

SUBSTANCE: device to supply and distribute electric energy at intermediate traction substations includes sections of input, sections of transformers connection, a link, switches, disconnectors, at the same time on each section of input a switch is connected to a line of power transmission, and the disconnector is connected to a common point of the link with a section of transformer connection.

EFFECT: expansion of functional capabilities of a device with preservation of quantity of electrical equipment in it.

1 dwg

Description

The invention relates to circuits of main and distribution AC networks, namely for connecting networks of the same frequency, powered from different sources.

A known switchgear supply voltage of the substation at the seals (Unified traction substations of the main railways. Circuit diagrams with new types of relays. Typical materials for the design of OTM 32-4243-01 // Circuit diagrams electric RU 3.3-220 kV. Album 1, - C.10), which includes two input sections, each containing one disconnector and connected on one side to two single-circuit power lines, and on the other, to transformer connection sections, each of which consists of one circuit breaker and one disconnector. Step-down transformers are connected to the opposite terminals of the transformer connection sections. The common points of the input sections and the connection sections of the transformer are interconnected by a jumper containing two disconnectors.

The disadvantage of this device is that it is intended only to power consumers through step-down transformers, it must be connected to two independent single-circuit power lines and cannot automatically partition power lines.

The closest in technical essence to the proposed device is a switchgear (US Pat. RF No. 2403662, IPC ⁸ H02J 3/04. Shumakov K.G., Efimov A.V., Verbitsky V.A., Shtin A.N. power supply and distribution of electrical energy at intermediate traction substations. Publ. 10.11.2010. Bull. No. 31), including two input sections containing one disconnector and a switch, sections of the transformer connection containing one disconnector, and a jumper containing two disconnectors.

The disadvantage of this device is that if any switch installed on the input section is damaged or work is performed on it, it is impossible to supply both sections of the transformer connection.

The objective of the invention is to expand the functionality of the device while maintaining the amount of electrical equipment in it.

The problem is solved in that the switches on the input sections are transferred from the jumper to the junction of the supply line.

The essence of the invention lies in the fact that at each section of the input, the switch is connected to the power line, and the disconnector is connected to a common jumper point with the connection section of the transformer.

Figure 1 presents a diagram of a device for powering and distributing electric energy at intermediate traction substations, comprising input sections 4 and 5, consisting of switches 2 and disconnectors 3. Input sections 4 and 5, on the one hand, are included in the cut of a single-circuit power line 1, and on the other hand, connected to the connecting sections of transformers 8 and 9, consisting of one disconnector 10. The common points of the input sections and connecting sections of the transformer are connected by a jumper 7, including two disconnectors 6.

The proposed device operates as follows.

When operating in normal mode, power is supplied to consumers from power line 1 through switches 2 and disconnectors 3 of input sections 4 and 5 and disconnectors 10 of sections for connecting transformers 8 and 9. Electricity is transferred through switches 2 and disconnectors 3 of input sections 4 and 5 and disconnectors 6 jumpers 7.

If any switch 2 is damaged or work is carried out on it, this switch 2 and the corresponding disconnector 3 of the input section 4 or 5 are turned off, the consumers can be powered through two circuits, for example, when disconnecting the input section 5: the first is the unconnected input section 4 and the corresponding the connection section of the transformer 8, the second is the disconnected input section 4, the jumper 7, consisting of disconnectors 6 and the connection section of the transformer 9, while the disconnector 3 of the disconnected input section 5 provides a visible gap.

Thus, the transfer of the switch in the input sections of the intermediate traction substation from the common jumper connection point with the transformer connecting section to the supply line connection point in the proposed device allows to expand the device’s functionality, increase the reliability of consumer power while maintaining the amount of electrical equipment in it.

Claims (1)

A device for supplying and distributing electric energy at intermediate traction substations, including input sections, transformer connection sections, a jumper, switches, disconnectors, characterized in that, at each input section, a switch is connected to a power line, and a disconnector is connected to a common jumper point with a connection section transformer.