CN215267654U

CN215267654U - Device is administered to terminal low-voltage

Info

Publication number: CN215267654U
Application number: CN202022913480.4U
Authority: CN
Inventors: 郑军; 孔瑜; 姚治国; 李宏; 孙蕾
Original assignee: Shouxian Power Supply Co of State Grid Anhui Electric Power Co Ltd
Current assignee: Shouxian Power Supply Co of State Grid Anhui Electric Power Co Ltd
Priority date: 2020-12-08
Filing date: 2020-12-08
Publication date: 2021-12-21
Anticipated expiration: 2030-12-08

Abstract

The utility model discloses a terminal low voltage treatment device in the technical field of related products of terminal low voltage treatment in transformer area, which comprises a transformer input winding and a transformer iron core, wherein the number of turns of the transformer input winding is fixed through a variable transformation ratio transformer, the output winding is provided with 4 sub-windings with different turns, the sub-windings are combined and output in different modes through a switch, the transformation ratio of the transformer can be adjusted, the transformer adopts polycrystalline alloy as a magnetic core, the loss is small, the volume is small, the service life is long, the installation and the maintenance are convenient, the synchronous switch technology is adopted, when the terminal voltage of a transmission line exceeds a qualified range, the output winding of the transformer needs to be adjusted, because the user load cannot be a pure resistive load, the situations of overcurrent and overvoltage are inevitably existed when the winding adjusting switch acts, the synchronous switch can realize double zero crossing, the problem of overvoltage and overcurrent is solved, the action time of the synchronous switch is less than 5ms, the action of the power-down protection circuit has no power-down influence on the user equipment.

Description

Device is administered to terminal low-voltage

Technical Field

The utility model relates to a relevant product technical field is administered to terminal low-voltage in transformer platform district, especially rural power grids in terminal low-voltage administer be a terminal low-voltage and administer the device.

Background

In the actual operation of a power grid, output lines of some transformers are relatively long, and when the load is relatively large, the voltage at the tail end of the transformers often exceeds a qualified range, so that user equipment faults are caused, the power supply quality is reduced, the normal operation of production and life of people is seriously influenced, and according to the conditions, a device capable of treating the problem of low voltage at the tail end of a power transmission line is particularly needed.

In order to solve the problem of low voltage at the tail end of a transmission line of a transformer, the patent adopts a transformer transformation ratio adjustable technology, when the tail end voltage exceeds a qualified range, the transformer is switched on, the transformation ratio of the transformer is adjusted, and the tail end voltage of the transmission line is ensured to be in the qualified range, therefore, a tail end low voltage treatment device is provided, through the variable transformation ratio transformer, the number of turns of an input winding of the transformer is fixed, an output winding of the transformer is provided with 4 sub-windings with different numbers of turns, the sub-windings are combined and output through a switch in different modes, the transformation ratio of the transformer can be adjusted, the transformer adopts polycrystalline alloy as a magnetic core, has small loss, small volume, long service life and convenient installation and maintenance, through a synchronous switch technology, when the tail end voltage of the transmission line exceeds the qualified range, the output winding of the transformer needs to be adjusted, because a user load cannot be a pure resistive load, and overcurrent and overvoltage conditions inevitably exist during the action of a winding adjusting switch, the synchronous switch can realize switching double zero-crossing, solve the problem of overvoltage and overcurrent, the action time of the synchronous switch is less than 5ms, and the action time has no power failure influence on user equipment.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a device is administered to terminal low-voltage to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a terminal low-voltage governance device, includes transformer input winding, transformer core, transformer output winding, synchro switch and measurement and control module, measurement and control module have when administering voltage and measure and control, the number of turns of transformer input winding is fixed, and output winding has the sub-winding of 4 different turns, the transformer core adopts polycrystalline alloy material, and transformer no-load loss is less than 0.5%, transformer output winding, the number of turns can be adjusted, and the transformer transformation ratio can be adjusted, and transformation ratio control range 1.05 ~ 1.20, synchro switch has the two zero cross functions in the disconnection closure process, has the overvoltage and overcurrent ability that the suppression switching process produced, just synchro switch action time reaches and is less than 5 ms.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model relates to a rationally, through the variable transformation ratio transformer, the transformer input winding number of turns is fixed, output winding has the sub-winding of 4 different numbers of turns, through the switch with the different mode combination output sub-winding, can adjust the transformer transformation ratio, the transformer adopts the polycrystal alloy as the magnetic core, the loss is little, small, long service life, easy to assemble and maintenance, through the synchro switch technique, surpass qualified scope when transmission line terminal voltage, need adjust transformer output winding, because user's load can not be pure hindering nature load, must exist the condition of overflowing and excessive pressure during winding regulating switch action, synchro switch can realize the two zero crossings of switching, the excessive pressure problem of overflowing more than the solution, synchro switch action time is less than 5ms, there is not the power down influence to user equipment during its action.

Drawings

FIG. 1 is a schematic view of the overall structure of a terminal low-voltage treatment device of the present invention;

FIG. 2 is a schematic structural view of a terminal low-voltage treatment device of the present invention;

in the figure: 1. a transformer input winding; 2. a transformer core; 3. a transformer output winding; 4. a synchronous switch; 5. and a measurement and control module.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model provides a device is administered to terminal low-voltage as shown in fig. 1-2, including transformer input winding 1, transformer core 2, transformer output winding 3, synchronous switch 4 and measurement and control module 5, measurement and control module 5 have and measure and control when administering voltage, 1 turn of transformer input winding is fixed, output winding has the sub-winding of 4 different turns, transformer core 2, adopt polycrystalline alloy material, transformer no-load loss is less than 0.5%, transformer output winding 3, the turn can be adjusted, transformer transformation ratio can be adjusted, transformation ratio control range 1.05 ~ 1.20, synchronous switch 4 has two zero-crossing functions of disconnection closed in-process, the overvoltage and overcurrent ability that has the suppression switching in-process and produces, and synchronous switch 4 action time reaches and is less than 5 ms.

The working principle is as follows: the low-voltage treatment device that this patent relates to installs at transmission line terminal, and when terminal voltage was in normal range, the transformer was by the bypass, does not produce the consumption, and when terminal voltage exceeded normal range, the input transformer adjusted the output winding number of turns, adjusted transformer output voltage to normal range to adjust in real time according to the terminal voltage value of circuit, accomplish the terminal low-voltage of circuit and administer.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a device is administered to terminal low-voltage, includes transformer input winding (1), transformer core (2), transformer output winding (3), synchronous switch (4) and measurement and control module (5), its characterized in that: the measuring and controlling module (5) is used for measuring and controlling voltage, the number of turns of the input winding (1) of the transformer is fixed, the number of turns of the output winding is 4, the number of turns of the sub-windings is different from that of the output winding, the iron core (2) of the transformer is made of polycrystalline alloy materials, no-load loss of the transformer is less than 0.5%, the number of turns of the output winding (3) of the transformer can be adjusted, the transformation ratio of the transformer can be adjusted, the adjustment range of the transformation ratio is 1.05-1.20, the synchronous switch (4) has a double zero-crossing function in a disconnecting and closing process, the overvoltage and overcurrent capacity generated in a switching process is restrained, and the action time of the synchronous switch (4) reaches less than 5 ms.