RU2046484C1 - Pole-mounted light-power substation - Google Patents

Abstract

FIELD: electrical engineering. SUBSTANCE: power transformer 3 is mounted on platform made of steel channel bars 6 supported by bracket built up of steel tubes 7. At its bottom, bracket is secured to mount 1 by means of clip and on its top, to channel bars 6. The latter are braced to body of trapezoidal mount 1 by means of studs ensuring desired strength of channel bars in their position. EFFECT: provision for mounting equipment weighing up to 700 kg as high as at 3.5 m above ground. 3 dwg

Description

 The invention relates to electrical engineering and can be used to receive electrical energy of a three-phase alternating current frequency of 50 Hz with a voltage of 10 kV, conversion and distribution at a voltage of 380 and 220 V.

 Known design mast transformer substations.

 Known pole-type transformer substation of a dead end type [1] It is arranged on a support having a cavity inside, in which low-voltage wires are laid. In our country, such a rack does not exist in the catalog of supports. Another option according to [1] high-voltage equipment is located at the foot of the supports in metal cabinets.

 A prototype of the invention can be a pole transformer substation with a voltage of 10 / 0.4 kV and a power of 25-100 kVA [2] The substation equipment is installed on a U-shaped structure consisting of two reinforced concrete standard racks connected by transverse metal structures for installing a power transformer, a high voltage and low voltage equipment. The prototype has a high metal consumption of 400 kg and two reinforced concrete racks were used for the layout.

 The objective of the invention is to provide significant savings in rolled metal, as well as saving one reinforced concrete racks.

 The task is carried out by arranging the substation equipment on one reinforced concrete rack of trapezoidal section with the installation of a power transformer on a specially made metal platform. Steel consumption per substation does not exceed 180 kg versus 400 kg in the prototype, i.e. more than 2 times.

 In FIG. 1 shows a substation, general view; in FIG. 2 shows a section aa in FIG. 1; in FIG. 3 shows the mounting of the bracket at the bottom.

 The substation consists of three nodes: a high voltage device, a power transformer, a low voltage switchgear.

 The substation equipment is mounted on a reinforced concrete rack of 1 trapezoidal section. From the high-voltage line 11, the voltage is supplied from the metal crosshead 2, on which the arresters 10 are installed, to the fuses 4 and then to the power transformer 3. From the power transformer through polyethylene pipes 13, through input 14, the voltage is supplied to the low voltage switchgear 5, and through polyethylene pipe 13 to low voltage lines 12.

 The power transformer 3 is mounted on a platform of steel channels 6, supported by a bracket of steel pipes 7. The bracket at the bottom is attached to the support with a clamp 8, and at the top it is attached to the channels 6. The channels are pulled to the body of the trapezoidal reinforced concrete rack with pins 9, which create the required strength channel positions 6.

 Pillar transformer substation of low power was created in accordance with the terms of reference in terms of research and development and the creation of experimental design documentation.

 The installation of a low-power pole-type transformer substation is supposed in agricultural distribution electric networks, but can be used in any branch of the national economy of Russia. The design of the substation is manufactured in the factory and delivered to the consumer in a complete form. Elements are assembled at the substation installation site by specialized installation companies.

 The current land use and farming policy in Russia in Russia is forcing ways to simplify rural transformer substations with lower steel rolling and reinforced concrete structures. At the same time, work is underway to reduce the consumption of building structures during the construction of low-voltage networks. Approximately for one individual farm in the village the installed capacity of the farm is 10 kVA. The solution to the problem is to provide electricity to consumers through an overhead line with a voltage of 10 kV, built along a settlement (farm, farm), with power transformers with receiving high-voltage devices and distribution devices for transmitting electricity through low voltage wires on poles (poles) directly to the consumer, possibly using self-supporting insulated wires. The construction of such electrical networks requires a very compact arrangement of the transformer substation on the pole. Maintenance of high-voltage equipment of the substation is provided from a telescopic tower or an on-board vehicle equipped with a device for lifting to a height of 3.5-4 m.

 The main goal of creating a 10 / 0.4 kV substation is to develop a design with significant savings in rolled metal and reinforced concrete. The pillar substation is located on one reinforced concrete rack CB 105.

 The invention has significant differences compared with the known technical solutions in terms of reducing the volume of metal and reinforced concrete structures due to installation on one rack.

 Technical advantages.

A pillar transformer substation with a voltage of 10 / 0.4 kV and a power of 25-100 kVA was adopted as the base object. It is arranged on two reinforced concrete racks of trapezoidal section with a total volume of 1 m ³ . Thus, the consumption of reinforced concrete is halved, i.e.

1 m ³ : 2 = 0.5 m ³ .

 The weight of metal in a pole substation on one rack is 180 kg, and for a basic product 400 kg.

2,22 где М_б вес металлопроката базового изделия;
М_м вес металлопроката новой подстанции.

2.22 where M _{b the} weight of the rolled metal base product;
M _{m the} weight of the metal of the new substation.

 Community Benefits.

= 1,8 кг/кВА, где М_уд удельный расход металла, кг/кВА;
М_н веc металлоконструкций новой подстанции;
Р_н минимальная мощность новой подстанции, кВА, принята 100 кВА.The use of a new pillar substation can significantly, 2.2 times, reduce the metal consumption for the creation of one substation. The area of land alienation under the pillar one-rack substation is lower than on the substation of the U-shaped structure (base). Specific metal consumption does not exceed
M _beats . ₁₀₀ =

= 1.8 kg / KW, where M _ud specific metal consumption, kg / KW;
M _n weight of metal structures of the new substation;
P _{n the} minimum power of the new substation, kVA, adopted 100 kVA.

=7,2кг/кВА.With a minimum power of PM = 25 kVA
M _beats . ₂₅ =

= 7.2kg / kVA.

 Research and development has been created for the invention and experimental design documentation has been created according to the plan of the Ministry of Fuel and Energy of the Russian Federation. It is intended for use in existing electric networks with a voltage of 10 kV of the Ministry of Fuel and Energy of the Russian Federation for electricity supply to agriculture.

Claims (1)

 POST-TRANSFORMER SUBSTATION OF SMALL POWER, containing a reinforced concrete support, a platform connected to it, on which a power transformer is installed, and a high-voltage switchgear of low voltage, characterized in that the platform is made in the form of two channels, one end of each of which is detachably fixed to the support with studs, and the free end is connected to the brackets by a bolted connection, while the brackets are fixed to the support with clamps.

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