CN203242482U

CN203242482U - 66 kilovolt grounding and station transformer

Info

Publication number: CN203242482U
Application number: CN 201320135666
Authority: CN
Inventors: 张冰杰; 郭朋英; 李振
Original assignee: LIAONING HUAYE GROUP DEVELOPMENT Co Ltd
Current assignee: Anshan Power Supply Co Of State Grid Liaoning Electric Power Co; Liaoning Huaye Group Development Co Ltd; State Grid Corp of China SGCC
Priority date: 2013-03-23
Filing date: 2013-03-23
Publication date: 2013-10-16
Anticipated expiration: 2023-03-23

Abstract

The utility model relates to a 66 kilovolt grounding and station transformer. The 66 kilovolt grounding and station transformer is of a single core and winding assembly structure. A three-phase and three-column iron core comprises a secondary winding and a main winding, wherein the main winding is in zigzag connection, and the zero phase of the main winding is led out; the secondary winding is in star connection, and the zero phase of the secondary winding is led out; the secondary winding is arranged outside the iron core; the zigzag main winding is arranged outside the secondary winding; the main winding is of a cylindrical structure, and consists of a winding I and a winding II which are equal in number of turns; the winding I and the winding II are respectively provided with a tap; the main winding is led out by condenser bushings; phases A, B and C are connected into an electric power system of which the rated voltage is 66kV; a phase O is grounded by an arc suppression coil; the secondary winding is led out by compound bushings; phases o, a, b and c are connected into an in-station power distribution system. The 66 kilovolt grounding and station transformer provided by the utility model has the advantages that a large amount of material cost is saved, the size is small, the weight is light, the electric energy loss is low, the equipment investment is small, the maintenance cost is low, and the operation safety factor is high.

Description

The double station of a kind of 66 kilovolts of ground connection transformer

Technical field

The utility model relates to a kind of transformer, relates in particular to the double station of a kind of 66 kilovolts of ground connection transformer.

Background technology

At present, traditional 66kV grounding transformer and 66kV station are split type with transformer, need 2 equipment intervals, 2 cover switch cubicles, although can solve arc suppression coil is installed by the 66kV system without neutral point problem, also can solve the problem of electricity consumption in the station, but the whole system floor space is larger, energy loss is large, equipment investment is large, maintenance cost is large, and operating safety factor is low, so do not reach optimum efficiency in electrical operation.

Summary of the invention

For overcoming the deficiencies in the prior art, the purpose of this utility model provides the double station of a kind of 66 kilovolts of ground connection and uses transformer, and floor space is little, and energy loss is little, and equipment investment is little.

For achieving the above object, the utility model is achieved through the following technical solutions:

A kind of 66 kilovolts of ground connection holding concurrently stood and used transformer, is single machine body structure, and three phase three limb core comprises secondary winding, main winding, and main winding is the indentation connection, draws zero phase; Secondary winding is star connection, draws zero phase; Secondary winding is arranged in unshakable in one's determination outside, and the indentation main winding is arranged in the secondary winding outside; Main winding is cylinder mode, is comprised of winding I and the winding II of equal turn numbers, and winding I and winding II all arrange shunting tap; Main winding is drawn by condenser-type terminal, and A, B, C access the electric power system that rated voltage is 66kV mutually, and O passes through grounding through arc mutually; Secondary winding is drawn by the combined type sleeve pipe, distribution system in o, a, b, the c phase access station.

Compared with prior art, the beneficial effects of the utility model are:

Compare with transformer with the station with existing split type grounding transformer, save an iron core, fuel tank, three main winding sleeve pipes and some transformers oil, thereby can save the lot of materials cost, and volume is little, lightweight, energy loss is little, equipment investment is little, and maintenance cost is little, and operating safety factor is high.

Description of drawings

Fig. 1 is front view of the present utility model.

Fig. 2 is vertical view of the present utility model.

Fig. 3 is winding arrangement structure schematic diagram of the present utility model.

Among the figure: 1-off circuit tap changer 2-condenser-type terminal 3-O phase sleeve pipe 4-combined type sleeve pipe 5-radiator 6-pressure relief valve 7-fuel outlet valve 8-Buchholz relay 9-oil level indicator 10-oil conservator.

Embodiment

Below in conjunction with Figure of description the utility model is described in detail, but should be noted that enforcement of the present utility model is not limited to following execution mode.

See Fig. 1～Fig. 3, a kind of 66 kilovolts of ground connection holding concurrently stood and used transformer, is single machine body structure, and three phase three limb core comprises secondary winding, main winding, and main winding is the indentation connection, draws zero phase; Secondary winding is star connection, draws zero phase; Secondary winding is arranged in unshakable in one's determination outside, and the indentation main winding is arranged in the secondary winding outside; Main winding is cylinder mode, is comprised of winding I and the winding II of equal turn numbers, and winding I and winding II all arrange shunting tap; Main winding is drawn by condenser-type terminal 2, and A, B, C access the electric power system that rated voltage is 66kV mutually, and O passes through grounding through arc mutually; Secondary winding is drawn by combined type sleeve pipe 4, distribution system in o, a, b, the c phase access station.

Embodiment:

The single machine body structure of transformer adopting, three phase three limb core, the secondary winding rated voltage is 0.4kV, voltage is lower, arranges near unshakable in one's determination, and indentation main winding (being Z-shaped winding) rated voltage is 66kV, voltage is higher, is arranged in the outside of secondary winding, effectively saves insulation distance.

Secondary winding can adopt cylinder mode or sped structure according to the size of capacity, main winding adopts cylinder mode, two parts by equal turn numbers form, be winding I and winding II, for satisfying voltage ripple of power network, winding I and winding II all arrange shunting tap, are used for non-excitation pressure adjustment, are connected with off circuit tap changer 1.Secondary winding is drawn by the combined type sleeve pipe 4 that is arranged on the case lid, 0.4kV distribution system in o, a, b, the c phase access station; Main winding is drawn by the condenser-type terminal 2 that is arranged on the case lid, and A, B, C access the electric power system that rated voltage is 66kV mutually, and O is drawn by O phase sleeve pipe 3, passes through grounding through arc.

Transformer tank is covered with pressure relief valve 6, and the casing side-lower is provided with fuel outlet valve 7, and oil conservator 10 is connected with transformer, and the junction is provided with Buchholz relay 8, and oil level indicator 9 is located on the oil conservator 10, and radiator 5 is arranged on the transformer sidepiece.

The utility model and existing split type grounding transformer are compared with transformer with the station, saves an iron core, fuel tank, three main winding sleeve pipes and some transformers oily, thereby can save the lot of materials cost, and volume is little, lightweight.

Claims

1. 66 kilovolts of ground connection holding concurrently stood and used transformer, it is characterized in that, be single machine body structure, three phase three limb core comprises secondary winding, main winding, and main winding is the indentation connection, draws zero phase; Secondary winding is star connection, draws zero phase; Secondary winding is arranged in unshakable in one's determination outside, and the indentation main winding is arranged in the secondary winding outside; Main winding is cylinder mode, is comprised of winding I and the winding II of equal turn numbers, and winding I and winding II all arrange shunting tap; Main winding is drawn by condenser-type terminal, and A, B, C access the electric power system that rated voltage is 66kV mutually, and O passes through grounding through arc mutually; Secondary winding is drawn by the combined type sleeve pipe, distribution system in o, a, b, the c phase access station.