CN101022219A

CN101022219A - Harmonic cancellation and power compensating device

Info

Publication number: CN101022219A
Application number: CNA2007100569718A
Authority: CN
Inventors: 刘树清
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-03-22
Filing date: 2007-03-22
Publication date: 2007-08-22

Abstract

This invention relates to a device for eliminating harmonic waves and compensating power, in which, a filter is composed of overlapped silicon-steel sheets and copper sheet windings, coils of three copper windings are the same relating to the power and controlled current, the entrance of the windings is connected with the net by switch, after absorbing harmonic waves, the output end of the filter is connected with multiple AC contactors and capacitors by multiple switch sets and the capacitor charges and discharges in terms of 50Hz, namely, harmonic waves are eliminated in the net after the higher-order harmonic waves pass through the filter, current without harmonic waves comes back to the net after being compensated reactively by the capacitor.

Description

Harmonic carcellation and power compensating device

Technical field

The invention belongs to a kind of harmonic carcellation and power compensating device.

Background technology

As everyone knows, along with developing rapidly of progress of science and technology and electric power, particularly metallurgical, chemical industry, the mine, the electric locomotive of department such as electric railway and direct current transportation, rectifying installation, electric furnace and other load, colour TV in the field of household appliances, a large amount of uses of power consumption equipments such as fluorescent lamp, Switching Power Supply in the electron trade, high frequency electric source, intermediate frequency power supply, the widespread usage of electric ballast etc., cause a large amount of high order harmonic components to inject electrical network, and cause sinusoidal wave distortion, the quality of power supply seriously descends, not only the capital equipment to electric power system produces significant impact, and users are also produced serious harm, the high order harmonic component harm of this kind electrical network and the problem of idle deficiency become increasingly conspicuous, the harm that causes is also more and more serious, and especially the excessive of high order harmonic component exceeds standard, and surge impact is frequent, the instantaneous saltus step of system voltage, make crest voltage too high, threaten the insulation safety of electric equipment, and break down; Produce eddy current, damping action makes the electric equipment local overheating, and noise is excessive, and excess power strengthens, and has increased the consumption of electric energy.At present, the method of harmonic carcellation and power back-off is that capacitor is connected in parallel in the electric power system, the characteristic of utilizing the capacitor terminal voltage not suddenly change, and on each capacitor series reactor, to reduce the impact of harmonic wave to system, but it is little to the aberration rate effect that reduces the total voltage waveform, also can bring extra electric quantity loss, and, each capacitor just needs a reactor, for example: 200 kilowatts capacitor compensation device cabinet generally needs totally 16000 yuan and be hinged with loaded down with trivial detailsly of the capacitor of 10 20,000 enamels and 10 reactors, and manufacturing cost is also high; Also having a kind of is to install isolating transformer additional, the coiling trouble, and simultaneously, one volume is big from 35000 yuan in transformer, the cost height.

Summary of the invention

The present invention provides a kind of simple in structure, harmonic carcellation and power compensating device that cost is low for solving the technical problem that exists in the known technology.

The technical scheme that the present invention takes for the technical problem that exists in the solution known technology is: it is made up of switch, A.C. contactor and capacitor, it is characterized in that: filter 1 is made up of the silicon steel sheet 2 and the copper sheet winding 3 of stack, the number of turns of three groups of copper sheet windings 3 is identical, the arrival end of winding 3 is connected with electrical network 5 respectively by many group switches 4 on the filter 1, and its port of export is connected with capacitor 8 with A.C. contactor 7 respectively by many group switches 6.

Advantage and good effect that the present invention has are: only calculate size of current that the size that needs compensation power and needs control and can calculate its capacity, and simple in structure, be easy for installation and maintenance, low cost of manufacture, product price is low, and generally each is 8000 yuan, energy savings.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the Filter Structures schematic diagram.

Among Fig. 1, Fig. 2: 1. filter, 2. silicon steel sheet, 3. copper sheet winding, 4. switch, 5. electrical network, 6. switch, 7. A.C. contactor, 8. capacitor.

Embodiment:

For further understanding summary of the invention of the present invention, characteristics and effect, following examples for example, and conjunction with figs. now are described in detail as follows, and see also Fig. 1, Fig. 2.

As shown in Figure 1 and Figure 2: filter 1 is made up of the silicon steel sheet 2 and the copper sheet winding 3 of stack, and the number of turns of three groups of copper sheet windings 3 is identical, and its number of turns is relevant with the size of current of power and control, and the big more number of turns of electric current is few more.Winding 3 can be reserved a plurality of heads, can adjust the size of output current by the joint of the different numbers of turn, the arrival end of each winding 3 all is connected with electrical network 5 respectively by many group switches 4 on the filter 1, after filter 1 absorbs harmonic wave, its port of export is connected with capacitor 8 with A.C. contactor 7 respectively by many group switches 6, and then capacitor 8 is by 50 hertz of charge and discharge.That is to say that higher Harmonics in Electric Power Network eliminated harmonic wave behind filter 1, the electric current of no harmonic wave carries out reactive power compensation through capacitor again and returns electrical network.The folding of power factor controller in control cubicle control A.C. contactor 7 is to cut off or to connect each group capacitor 8.

Its advantage is: simple in structure, be easy for installation and maintenance, and low cost of manufacture, product price is low, and one As each is 8000 yuan, energy savings.

Claims

1, a kind of harmonic carcellation and power compensating device, it is made up of switch, A.C. contactor and capacitor, it is characterized in that: filter (1) is made up of the silicon steel sheet (2) and the copper sheet winding (3) of stack, the number of turns of three groups of copper sheet windings (3) is identical, the arrival end that filter (1) is gone up winding (3) is connected with electrical network (5) respectively by many group switches (4), and its port of export is connected with capacitor (8) with many groups A.C. contactor (7) respectively by many group switches (6).