RU64438U1 - COMPREHENSIVE-BLOCK TRACING SUBSTATION OF AC VARIABLE SEISMIC RESISTANCE - Google Patents

Abstract

The utility model relates to electrical engineering, namely to traction substations of alternating current, and can be used in traction power supply systems of electric railways. The complete-block alternating current traction substation of increased seismic resistance consists of separate functional, weatherproof, transportable modules of full factory readiness with supporting and adjusting devices, the enclosing structure of which, including insulated end walls and floors, do not have thermal “shunts” inside which electrical and auxiliary equipment is fully mounted, adjusted and tested at the factory in the factory. To increase the seismic resistance, the complete-block substation is equipped with seismic sensors with the effect of tripping input and output switches and other connections, and is equipped with flexible spatial docking devices that are installed between the modules and which provide connecting nodes with detachable contacts designed to connect the busbars and spare buses of adjacent modules. Attachment switches and bypass disconnectors are mounted on drawers, with bypass disconnectors located in insulated compartments, and connecting to the spare bus and feeder of the contact network by an isolated rigid bus or high-voltage cable. For passage from one module to another, doors are provided in the end walls.

Description

The utility model relates to electrical engineering, namely to traction substations of alternating current, and can be used in traction power supply systems of electric railways.

Known traction substation of alternating current using insulated factory-made modules, of which a closed switchgear of 27.5 kV (switchgear-27.5 kV) is assembled at the installation site [1]. The main electrical connection circuit of the ZRU-27.5 kV consists of busbars A and B, busbar and line disconnectors and switches permanently mounted inside the modules, as well as a spare bus and bypass disconnectors installed on the outside of the modules (see Fig. 1 and fig. 7 [1]). Such a technical solution has a number of significant drawbacks, of which we note the main ones. Firstly, the location of the spare bus and bypass disconnectors on the outside of the modules, in the immediate vicinity of the feed-through insulators of the feeders of the contact network, makes it impossible to maintain them without disconnecting these feeders. Secondly, as can be seen from the diagram (Fig. 1. See [1]), the modules provide for the control of bus and line disconnectors of the feeder of the contact network with one drive, i.e. rigid mechanical connection of these disconnectors and their installation in close proximity to each other in one cramped compartment. This makes it impossible to carry out repair and maintenance work, for example, on a linear disconnector without disconnecting the busbar section to which this feeder is connected, i.e. To perform this work, it is necessary to disconnect half of the traction substation, which is unacceptable. And, finally, thirdly, the constructive implementation of switchgear-27.5 kV according to option [1] does not provide stable operation neither in the conditions of heaving soils, nor even in seismically hazardous areas.

In addition, RF patent No. 2115216 [2] is also known, which describes the insulated design of the module without thermal "shunts" between the inner wall and the outer skin of the enclosing structure.

Closest to the claimed facility is a complete block substation provided in the source [1]. She is taken as a prototype.

The proposed utility model is illustrated in the drawing, which shows a fragment (of two modules) of a complete block traction substation of alternating current of increased seismic resistance. The device consists of: 1 - modules with an insulated enclosing structure; 2 - flexible insulated docking modules; 3 - seismic sensors; 4 - supporting and adjusting devices with rollers; 5 and 6 - sleeper rail.

When installing a complete block substation, the support and adjustment devices make it easy to move the modules along the rail (or channel) base, and also significantly facilitates the docking of the modules. The use of flexible insulated docking devices provides thermal and mechanical isolation of the modules, which makes it possible to provide increased seismic resistance of the complete-block substation and the stability of work in heaving soils by hard fixing each module. Under the influence of seismic phenomena, the traction substation is de-energized, due to the command from the seismic sensors installed in each module, to turn off the input switches and other connections.

The technical result of the claimed utility model is to increase the seismic resistance of a complete block substation and the stability of its operation in heaving soils, as well as the unification of circuit and structural solutions of ZRU-27.5 kV in a complete block design, which allows installing a spare bus and bypass disconnectors inside the module. In addition, the proposed technical solution allows to improve serviceability and increase the efficiency of using the volume of modules. The technical result is due to the fact that in the design of a complete block substation for docking modules

flexible spatial insulated docking devices are used, as well as seismic sensors with the effect of tripping input switches and other connections during seismic events. In addition, in the proposed substation in the circuit of the main electrical connections, switches of all connections and bypass disconnectors are installed on retractable bogies. In this case, bypass disconnectors are installed on retractable bogies in insulated compartments, and they are connected to them by an insulated rigid bus or a high-voltage cable.

The modules of the proposed substation are structurally carried out, as already noted, according to the patent of the Russian Federation No. 21115216 [2] with insulated end walls, which provide doors for passage of repair personnel from one module to another. Docking of the modules is carried out by a heat-insulated flexible docking device, which provides increased seismic resistance of the unit-block substation, as well as thermal and mechanical isolation of the modules and passage from one module to another. An analogue of such a device is the docking device of a two- or multi-section ground transport (tram or trolleybus). To connect the busbars and spare busbars of adjacent modules, a special insulating compartment is provided in the docking device, in which jumpers isolated from each other are laid with detachable contact joints designed to connect busbars and spare busbars of adjacent modules, which greatly facilitates the electrical separation of modules in seismic events. In addition, the modules of the complete block substation are equipped with seismic sensors that act in case of seismic events to trip input switches and other connections.

The inventive utility model can also be used at any other complete block substations.

Information sources

1. Andreev V.I., Baranov N.A., Gulak A.A., Zhukov A.I., Mizintsev A.V., NIIEFA-ENERGO, St. Petersburg, Russia; Feldman S.O., Road Electrotechnical Laboratory of the Belarusian Railway, Minsk, Belarus. Closed switchgear 27.5 kV. p. 316-320. Electrification and scientific and technological progress in railway transport / Materials of the Second International Symposium eltrans _{' 2003} , October 21-24, 2003, PSUPS, St. Petersburg, Russia. St. Petersburg, 2003. (Prototype).

2. Patent No. 21115216. Darchiev S.Kh., Soldatov V.L., Kligman M.V., Nechaev A.G. and Tuchin V.N. Module of complete block electrical substation. 07/10/98. Bull. No. 19.

Claims (5)

1. A complete block traction substation of alternating current of increased seismic resistance, consisting of separate functional, weatherproof, transportable modules, in which there are switches, disconnectors, precast and spare tires, with support and control devices, the enclosing structure of which includes insulated end walls and floors, electrical equipment and auxiliary equipment, characterized in that it is equipped with seismic sensors with the effect of tripping switches inputs and other connections and is equipped with flexible spatial docking devices that are installed between the modules and which provide connecting nodes with detachable contacts designed to connect the busbars and spare buses of adjacent modules. 2. A complete block AC substation according to claim 1, characterized in that the spare bus is installed inside the module between the ceiling and the roof. 3. A complete block AC substation according to claim 1, characterized in that the switches and bypass disconnectors are mounted on retractable trolleys. 4. The complete block substation according to claim 1, characterized in that the bypass disconnectors are mounted on sliding elements in special insulated compartments. 5. The unit-block substation according to claim 1, characterized in that the connection of the bypass disconnector to the spare bus and the feeder of the contact network is made by an insulated rigid bus or a high-voltage cable.