RU2390895C1 - Container-type converting device for combined installation of glase ice melting and compensation of reactive power - Google Patents

Abstract

FIELD: electricity.

SUBSTANCE: on the basis of container-type converting device there can be built combined installation for glase ice melting on wires and wire ropes of overhead electric lines and compensation of reactive power; switching over from melting mode to compensation mode is performed in it with minimum number of commutations of power equipment, and equipment itself allows installation on outdoor substation. Device includes thyristor modules located inside transport container, phases of converter bridge, which are assembled into a circuit, thyristor module control units, connector with electromechanical drive, which is connected parallel to poles of converter bridge phase, and system of forced air cooling, as well as primary control system located outside container; at that, anode, cathode and phase terminals of converter bridge phase forms both signals to control units of thyristor modules, and control signals of electromechanical drive for opening or closing the connector.

EFFECT: cost cutout owing to reducing the costs for capital construction, increasing the level of equipment readiness and enlarging its functions.

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Description

Technical field

The invention relates to the field of electrical engineering and can be used in power substations, where it is necessary to ensure icing on wires or isolated from supports of lightning protection cables of overhead power lines (OHL) of power transmission lines, as well as to provide the level of required voltage in load nodes and control of reactive power flows.

State of the art

Known combined installation for melting ice and reactive power compensation [1], containing two three-phase groups of thyristor modules, two groups of three-phase reactors, a control system and seven high-voltage disconnectors. In this version, it is assumed that all disconnectors are of an external installation, and their remote control is carried out from the central dispatch panel of the substation. The groups of thyristor modules do not have hard common points, the design of such groups is associated with additional difficulties, and switching from melting mode to reactive power compensation mode or vice versa requires a large number of switch disconnections according to a complex algorithm.

Also known is a container-type converting installation for smelting ice on wires and cables of overhead power lines [2], containing thyristor modules assembled according to a three-phase converter bridge, thyristor module control units and a forced air cooling system installed inside the transport container, as well as a primary system control located outside the container. This installation, which we adopted as a prototype, is installed in an open substation and does not require a special building and an external cooling system. If necessary, switching from the melting mode to the compensation mode has the same disadvantages as [1].

SUMMARY OF THE INVENTION

The objective of the invention is the creation of a container-type converting device, on the basis of which a combined installation for melting ice on wires and cables of overhead power lines and reactive power compensation can be built, and in which the transfer from the melting mode to the compensation mode would be carried out with a minimum number of switching power equipment, and the equipment itself allowed installation at an open substation. The solution to this problem provides cost savings by reducing the cost of capital construction, provides an increase in the level of equipment availability and expansion of its functions.

The essence of the invention lies in the fact that the container-type converting device for a combined installation of ice melting and reactive power compensation contains thyristor modules located inside the transport container assembled into a phase bridge converter circuit, thyristor module control units and a forced air cooling system, parallel to the phase converter poles a bridge is connected an electromechanical disconnector, also located inside to on the container, and the anode, cathode and phase terminals of the phase of the converter bridge and the primary control system, which generates both signals to the thyristor module control units, and electromechanical drive control signals to close or open the disconnector, are displayed outside the container.

This set of features allows to solve the problem of the invention.

The implementation of the invention

The implementation of the invention illustrates the diagram of a container-type converting device for a combined installation of ice melting on wires and cables of overhead power lines (VL) of power transmission and reactive power compensation, shown in figure 1.

The device comprises thyristor modules 2 located inside the transport container 1, assembled into a phase diagram of the converter bridge, thyristor module control units 3 and forced air cooling system 4, and a disconnector 5 with an electromechanical drive 6, also located inside the container 1, connected to the poles of the converter bridge phase; the anode 7, cathode 8 and phase 9 terminals of the converter bridge phase are displayed outside the container, and the primary control system 10, located outside the container 1, generates both signals to the control units 3 of the thyristor modules 2 and control signals of the electromechanical drive 6 to close or open the disconnector 5.

Figure 2 shows as an example the wiring diagram of three container-type converters 1.1 ... 1.3, which allows to organize both a three-phase rectifier bridge for direct melting of ice on overhead lines and cables, and reactive power compensation by connecting capacitor banks 13.1 ... 13.3. In the ice melting mode, both disconnectors 11 and 12 are closed, and in the compensation mode they are open. In this case, the disconnectors 5 (figure 1) in the containers 1.1 ... 1.3 in the melting mode are open, and in the compensation mode closed. As can be seen, the transfer of the installation from the ice melting mode to the reactive power compensation mode when reactive elements are connected to a "star" is achieved by switching only two disconnectors. When using the connection diagram in the "triangle" you will need another disconnector. In any case, this is substantially less than in [1, 2].

Thus, the goal was to create a container-type converter for a combined installation of ice melting on wires and cables of overhead lines and reactive power compensation, in which the transfer from the melting mode to the compensation mode would be carried out with a minimum number of switching power equipment, and the equipment itself could be installed on an open substations - achieved.

Information sources

1. RF patent No. 2316867, cl. Н02G 7/16, Н02J 3/18 R.A. Dainovsky, N.G. Lozinova, M.I. Mazurov "Combined installation for melting ice and reactive power compensation." Publ. BI No. 4 of 02/10/2008.

2. RF patent No. 2207746, class. H05K 7/10, G12b 15/02. L.L. Balyberdin, M.K. Gurevich, M.A. Kozlova, Yu.A. Shershnev. "Container-type conversion plant." Publ. BI No. 18 dated 06/27/2003.

Claims (1)

A container-type converter for a combined installation of ice melting and reactive power compensation, containing thyristor modules located inside a transport container assembled into a three-phase converter bridge circuit, thyristor module control units and forced air cooling system, as well as a primary control system located outside the container, characterized the fact that the thyristor modules are assembled in the phase diagram of the converter bridge, parallel to the poles of the phases A converter disconnector with an electromechanical drive, also located inside the container, is connected to the outside of the container, and the anode, cathode and phase terminals of the phase of the converter bridge are displayed outside the container, and the primary control system generates both signals to the thyristor module control units and control signals of the electromechanical drive to short circuit or disconnector opening.

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