CN203027169U

CN203027169U - Dropping-compensation solid soft starting device for axial-flow compressor

Info

Publication number: CN203027169U
Application number: CN 201220733647
Authority: CN
Inventors: 张智军; 陈博; 赵丽; 唐春; 魏原珂
Original assignee: Chengdu Chengfa Science & Technology Power Engineering Co Ltd
Current assignee: Chengdu Chengfa Science & Technology Power Engineering Co Ltd
Priority date: 2012-12-27
Filing date: 2012-12-27
Publication date: 2013-06-26
Anticipated expiration: 2022-12-27

Abstract

A dropping-compensation solid soft starting device for an axial-flow compressor comprises a soft starting cabinet, a step-down transformer, a step-down transformer device control cabinet, a reactive power generator and a reactive power control cabinet, wherein the input end of the soft starting cabinet is connected with a bus, the output end of the soft starting cabinet is connected with the step-down transformer and used for conducting or disconnecting a current path between the bus and the step-down transformer, the step-down transformer control cabinet is connected with the step-down transformer and used for controlling a starting voltage of a drive motor of the axial-flow compressor, output by the step-down transformer, the output end of the step-down transformer is connected with the drive motor of the axial-flow compressor and the reactive power control cabinet respectively, the reactive power generator is connected with the reactive power control cabinet, the reactive power is generated in a starting process of the drive motor of the axial-flow compressor, and the reactive power which is absorbed by the drive motor of the axial-flow compressor from a system electric network can be reduced.

Description

What be used for axial flow compressor falls the benefit solid state soft starting device

Technical field

The utility model relates to the axial flow compressor starting device, particularly a kind of soft starter device of axial flow compressor.

Background technology

Axial flow compressor is one of core drive equipment in ironmaking processes, for whole iron and steel enterprise, and the stable operation of axial flow compressor and the output of blast furnace, benefit, closely bound up safely.Axial flow compressor its control effect rationally, whether improve, determined to a great extent to give full play to the potential of air blast, safety, stable, operation efficiently are with the necessary wind regime of assurance conditions of blast furnace direct motion.

Yet the power system network degree is higher, and ability anti-interference or fault is also lower, and system is more fragile.In the dragging motor starting process of axial flow compressor, can cause voltage ripple of power network, if falling, line voltage surpasses 10% ~ 15%, can affect the stable operation of axial flow compressor, therefore, the dragging motor of axial flow compressor guarantees that it is the most basic requirement that line voltage falls in 10% ~ 15% scope in starting process.

Summary of the invention

The purpose of this utility model is to overcome the deficiencies in the prior art, provide a kind of for axial flow compressor the benefit solid state soft starting device falls, to reduce the caused voltage ripple of power network of dragging motor starting of axial flow compressor.

The technical solution of the utility model: dragging motor starting current and the bus bar side electric current of axial flow compressor are effectively separated, under prerequisite to the requirement of motor torque when satisfying load starting, by adjusting the starting device parameter, the dragging motor starting current of axial flow compressor is controlled in 1.5 times of its rated current.

described in the utility model for axial flow compressor the benefit solid state soft starting device falls, comprise soft starting cabinet, reducing transformer, the reducing transformer control cubicle, reacance generator and idle control cubicle, the input of soft starting cabinet is connected with bus, its output is connected with reducing transformer, be used for conducting or block bus and reducing transformer between current path, the reducing transformer control cubicle is connected with reducing transformer, the starting voltage that is used for the dragging motor of the axial flow compressor that the regulation and control reducing transformer exports, the output of reducing transformer respectively with the dragging motor of axial flow compressor be connected control cubicle and be connected, reacance generator is connected with idle control cubicle, reacance generator produces reactive power in the dragging motor starting process of axial flow compressor, reduce dragging motor absorbing reactive power from system's electrical network of axial flow compressor.

Use of mending solid state soft starting device for falling of axial flow compressor described in the utility model operates: the operation cabinet that the dragging motor of at first being connected with axial flow compressor with bus is connected disconnects, then soft starting cabinet is closed a floodgate, after soft starting cabinet closes a floodgate, the dragging motor of axial flow compressor is mended solid state soft starting device access electrical network, beginning reduced voltage starting by falling.Along with the increase of rotating speed, described motor terminal voltage raises gradually, and starting torque progressively increases.After the dragging motor of axial flow compressor reached rated speed, the operation cabinet closed a floodgate, and benefit solid state soft starting device, proceed-to-send fall in excision simultaneously.

The utlity model has following beneficial effect:

1, use described in the utility model for axial flow compressor the benefit solid state soft starting device falls, under the prerequisite of the dragging motor starting torque that guarantees axial flow compressor, reduced starting voltage.

2, described in the utility model falling mended the needed reactive power of dragging motor starting process that solid state soft starting device can provide the part axial flow compressor, thereby reduced the dragging motor of axial flow compressor from the idle amount of electrical network absorption, reduced the caused voltage ripple of power network of dragging motor starting of axial flow compressor, guaranteed that line voltage falls to be controlled in 10% ~ 15% scope.

Description of drawings

Fig. 1 is the structural representation of mending solid state soft starting device that falls for axial flow compressor described in the utility model;

Fig. 2 is the electrical schematic diagram of mending solid state soft starting device that falls for axial flow compressor described in the utility model.

In figure, 1-bus, 2-soft starting cabinet, 3-reducing transformer, 4-reducing transformer control cubicle, 5-reacance generator, 6-idle control cubicle, 7-operation cabinet, 8-motor, 9-axial flow compressor, 10-voltage transformer cabinet, 11-incoming line cabinet.

Embodiment

Also by reference to the accompanying drawings the structure of mending solid state soft starting device of falling for axial flow compressor described in the utility model is described further below by embodiment.

In the present embodiment, be used for the structure of falling the benefit solid state soft starting device of axial flow compressor as shown in Figure 1, comprise soft starting cabinet 2, reducing transformer 3, reducing transformer control cubicle 4, reacance generator 5 and idle control cubicle 6, in Fig. 1, the annexation of operation cabinet 7 with the dragging motor 8 of bus 1 and axial flow compressor 9 described also.Soft starting cabinet 2, reducing transformer 3, reducing transformer control cubicle 4, reacance generator 5 and idle control cubicle 6 all have the commercially available prod, and its fundamental diagram in Fig. 2, has also been described the annexation of voltage transformer cabinet 10, incoming line cabinet 11 and bus 1 as shown in Figure 2.Incoming line cabinet 11 will be from the power delivery of higher level transformer station to bus 1, and voltage transformer cabinet 10 is used for the monitoring busbar voltage.

Claims

One kind be used for axial flow compressor the benefit solid state soft starting device falls, it is characterized in that comprising soft starting cabinet (2), reducing transformer (3), reducing transformer control cubicle (4), reacance generator (5) and idle control cubicle (6),

The input of soft starting cabinet (2) is connected with bus (1), and its output is connected with reducing transformer (3), be used for conducting or block bus and reducing transformer between current path,

Reducing transformer control cubicle (4) is connected with reducing transformer (3), is used for the starting voltage of the dragging motor (8) of the axial flow compressor (9) that regulation and control reducing transformers (3) export,

The output of reducing transformer (3) respectively with the dragging motor (8) of axial flow compressor (9) be connected control cubicle (6) and be connected, reacance generator (5) is connected with idle control cubicle (6), reacance generator (5) produces reactive power in dragging motor (8) starting process of axial flow compressor, reduce dragging motor (8) absorbing reactive power from system's electrical network of axial flow compressor.