CN104700995A

CN104700995A - Method for reducing no-load loss of transformer

Info

Publication number: CN104700995A
Application number: CN201510136527.1A
Authority: CN
Inventors: 郭建厂
Original assignee: HANDAN DEVELOPMENT ZONE CHONGER ELECTRICAL EQUIPMENT DESIGN CENTER
Current assignee: HANDAN DEVELOPMENT ZONE CHONGER ELECTRICAL EQUIPMENT DESIGN CENTER
Priority date: 2015-03-23
Filing date: 2015-03-23
Publication date: 2015-06-10

Abstract

The invention relates to a method for reducing no-load loss of a transformer. Each of the tail ends of a primary winding of the transformer is connected with a high-resistance electrical reactance resisting device in series; the high-resistance electrical reactance resisting devices are connected with a vacuum switch or a tap switch in series respectively, so that the input or removal of the high-resistance electrical reactance resisting devices is realized; when the transformer is put into practice, the high-resistance electrical reactance resisting devices are put at first and then are removed rapidly after 1-5 seconds; when the transformer is operated without load, the high-resistance electrical reactance resisting devices are put so that the no-load current is reduced; when the transformer is switched off from a power grid, the high-resistance electrical reactance resisting devices are removed at first and cutoff over-voltage is prevented. The structure is simple and the no-load loss of the transformer can be greatly reduced.

Description

Reduce a kind of method of transformer noload losses

Art

The invention belongs to power transformer power-economizing method, particularly a kind of a kind of method reducing transformer noload losses.

Background technology

The power transformer of current operation is mostly conventional being manufactured by the principle of mutual inductance or self coupling with copper cash and iron core (magnetic core), no-load loss is unavoidable, and the contained load of operating transformer is the state of both having stopped namely in electrical network, the operational mode of electrical network cannot realize again both having stopped both to have thrown, then cause existing transformer noload losses amount very large, the whole nation accounts for the 20-25% of total capacity according to statistics.

Summary of the invention

In order to overcome the shortcoming of prior art, the invention provides a kind of a kind of method reducing transformer noload losses, its method is simple, greatly can reduce transformer noload losses.

The present invention solves the technical scheme that its technical problem takes: seal in a high impedance reactor respectively at the end of the armature winding of transformer, high impedance reactor is in parallel with vacuum switch or shunting switch respectively, realize the input to high impedance reactor or excision, transformer first drops into high impedance reactor when putting into operation, and 1-5 excises second afterwards fast; Then drop into high impedance reactor when no-load transformer runs, make it to reduce no-load current; When transformer disconnects electrical network, first excise high impedance reactor, prevent cut-off overvoltage.

The present invention has following advantages: 1), method is simple, and cost is low; 2), can supporting current any power transformer; 3), no-load transformer electric current and loss can effectively be reduced; 4), coordinate transformer master to enter switching manipulation and effectively can reduce inrush current of transformer and disjunction transformer cut-off overvoltage.Greatly can reduce transformer noload losses.

Accompanying drawing explanation

Below in conjunction with drawings and Examples, the present invention is further described.

Fig. 1 is principle of the invention figure.

Embodiment

As shown in Figure 1, a high impedance reactor 3 is sealed in respectively at the end of the armature winding 1 of transformer, high impedance reactor 3 is in parallel with vacuum switch or shunting switch 2 respectively, realize the input to high impedance reactor 3 or excision, transformer first drops into high impedance reactor and excised fast afterwards 3,1-5 seconds when putting into operation; Then drop into high impedance reactor 3 when no-load transformer runs, make it to reduce no-load current; When transformer disconnects electrical network, first excise high impedance reactor 3, prevent cut-off overvoltage.

Described high impedance reactor 3 is the high reactor obstructed of core type.

The reactance of described high impedance reactor 3 is armature winding 1 approximate open circuit when can make no-load transformer.

Claims

1. one kind is reduced a kind of method of transformer noload losses, it is characterized in that: seal in a high impedance reactor (3) respectively at the end of the armature winding (1) of transformer, high impedance reactor (3) is in parallel with vacuum switch or shunting switch (2) respectively, realize the input to high impedance reactor (3) or excision, transformer first drops into high impedance reactor (3) when putting into operation, 1-5 excises second afterwards fast; Then drop into high impedance reactor (3) when no-load transformer runs, make it to reduce no-load current; When transformer disconnects electrical network, first excise high impedance reactor (3), prevent cut-off overvoltage.

2. a kind of method of reduction transformer noload losses according to claim 1, is characterized in that: the reactor that described high impedance reactor (3) obstructs for core type is high.

3. a kind of method of reduction transformer noload losses according to claim 1, is characterized in that: the reactance of described high impedance reactor (3) is armature winding (1) approximate open circuit when can make no-load transformer.