CN202042907U

CN202042907U - Small-sized energy-saving filtering /compensation device

Info

Publication number: CN202042907U
Application number: CN201120175238XU
Authority: CN
Inventors: 朱春明; 朱羽镜
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-05-27
Filing date: 2011-05-27
Publication date: 2011-11-16
Anticipated expiration: 2021-05-27

Abstract

The utility model relates to devices for filtering harmonics in a power distribution network, in particular to a small-sized energy-saving filtering /compensation device, which comprises an outer casing. A filtering unit is arranged in the outer casing and comprises an air switch, a thyristor contactless switch, a reactor and a 30Kvar three-phase capacitor which are in series connection, wherein the thyristor contactless switch is composed of three bidirectional thyristors, and the reactor is made of ultracrystalline alloy materials. The small-sized energy-saving filtering /compensation device is mainly used for solving the problem of influence of high-order harmonics (for example: five times of harmonic current) on the power distribution network, and capable of filtering the harmonics, compensating reactive power and loss caused by the harmonics, and increasing use ratio of equipment.

Description

Miniature energy-saving filtering/compensation arrangement

Technical field

The utility model relates to the device of filtering harmonic wave in the distribution network, particularly a kind of miniature energy-saving filtering/compensation arrangement.

Background technology

High order harmonic component to the harm of power distribution network in general, high order harmonic component is seldom from the upper level electric power system, and main from controlled power consumption equipment and rectifying installation in the same electric pressure.According to statistics, in the electric equipment that damages owing to high order harmonic component, power capacitor accounts for 40% (wherein series reactor accounts for 30%), and transformer accounts for 10%, power consumption equipment accounts for 7%, or the like.

Such as: high order harmonic component is a harmonic source to the transformer that influences of transformer, be again to transmit the intermediate link that other harmonic source produces harmonic wave, high order harmonic component can cause partial discharge of transformer intensity and dielectric loss to increase, its work noise is increased, and Transformer Winding is generated heat, reduce the efficient and the life-span of transformer.

The utility model content

The purpose of this utility model is to provide a kind of miniature energy-saving filtering/compensation arrangement, it mainly solves the influence of high order harmonic component (as: 5 subharmonic current) to distribution network, can play the filtering harmonic wave, compensating power, improve usage ratio of equipment, the effect of the loss that attenuating reactive power and harmonic wave cause.

The utility model solves the problems of the technologies described above the technical scheme that is adopted.

A kind of miniature energy-saving filtering/compensation arrangement is characterized in that: it has a shell, has filter unit in the shell; The controllable silicon noncontacting switch that this filter unit is made up of air switch, three bidirectional triode thyristors, adopt the reactor of ultramicro-crystal alloy made and the three-phase capacitor of 30Kvar to be composed in series.

Described miniature energy-saving filtering/compensation arrangement is characterized in that: the AB phase of described three-phase capacitor, BC phase, alternate discharge indicator light binding post A, B, the C that inserts discharge resistance respectively and draw of AC.

Described miniature energy-saving filtering/compensation arrangement is characterized in that: in the described shell radiator fan is housed.

The beneficial effects of the utility model are.

1, the filter unit in the utility model mainly is based on the operation principle of passive " LC " filtering.The utility model device is parallel on the 0.4KV bus of system, and is near more good more from harmonic source in principle.Based on this, the best applications pattern of this module is " filtering/compensation on the spot ", especially be used closely with the variable-frequency motor that is dispersed in each operation, direct current machine and other harmonic sources load, be intended to the filtering harmonic wave, compensating power, improve usage ratio of equipment, lower the loss that reactive power and harmonic wave cause.

2, the utility model mainly is to be loads such as the asynchronous motor in the 0.4KV system, DC motor, adjustable frequency motor, local compensation of making to measure and centralized compensation device, and especially for the engineering of reworked, its volume is little.But this module is not omnipotent, and it is not suitable for the harmonic wave that intermediate frequency furnace, arc furnace, electric welding machine and other ferro resonance produce.

Description of drawings

Fig. 1 is the structural representation of filter unit in the utility model.

Embodiment

The utility model discloses a kind of miniature energy-saving filtering/compensation arrangement.It has a shell, has filter unit in the shell; The controllable silicon noncontacting switch that this filter unit is made up of air switch, three bidirectional triode thyristors, adopt the reactor of ultramicro-crystal alloy made and the three-phase capacitor of 30Kvar to be composed in series.The controllable silicon noncontacting switch that described three bidirectional triode thyristors are formed is by the peripheral control unit signal controlling.Heat dissipation problem when considering the work of mould filter unit, inside is equipped with radiator fan, and therefore, temperature rise is extremely low.The resonance frequency of 5 times, 7 times filter units, respectively resonance can guarantee filtering harmonic wave reliably on 5 times, 7 times frequencies because integrated, volume is little, has saved the installation site widely.

See also Fig. 1, the concrete structure of filter unit is in the utility model: it is intended to insert the input terminal of the air switch 1 of power supply as its power supply by one, the 380VAC that is system inserts this air switch, and the main effect of this air switch 1 is that the power supply with major loop inserts this device.In the bottom of mains switch 1, insert a controllable silicon noncontacting switch 2 of forming by three bidirectional triode thyristors, the main effect of this controllable silicon noncontacting switch 2 is to make the LC loop switching of bottom not have concussion, in current zero-crossing point input and excision LC loop.Insert a reactor 3 in these controllable silicon noncontacting switch 2 bottoms, this reactor 3 adopts the ultramicro-crystal alloy made, loss is low, have only 1/5 of silicon steel core material, therefore, it is also extremely low to generate heat, this material has higher saturation induction density (1.1～1.2T), high magnetic permeability, low-coercivity, low-loss and good stable, resistance to wear, corrosion resistance.The material that is used to make the ultracrystallite iron core is described as " green material ", be widely used in replacing silicon steel, permalloy and ferrite.Insert the three-phase capacitor 4 of a 30Kvar in the bottom of reactor 3, consider the abundant of capacitor discharge, insert discharge resistance respectively and for for the purpose of directly perceived in that capacitor AB phase, BC phase, AC are alternate, the discharge indicator light binding post A, B, the C that draw, whether the main effect of this indicator light is for capacitor is discharged more fully, also be in order to indicate capacitor to put into operation simultaneously.All the major loop element is for being connected in series, and this series arm is parallel on the bus (0.4KV) that need carry out reactive power compensation or filtering.

The design philosophy of this filter unit is on the basis of discrete component, dwindles the installation site, is convenient to install, and is convenient to control.Mainly be based on succeeding in developing of ultracrystallite material reactor, reactor that can volume is bigger dwindles, be installed in the less shell, as: 130*280 (350) * 400 (the long * height of wide *).If there is not the miniature reactor of this small size, this filter unit is impossible produce, this is with at present popular on the market, only being many as the difference of " intelligent capacitance module ", " intelligent object " etc. connects reactor in one, the user need not external reactor, can save the assembling wiring of installation site and Pan Guichang widely.Can adjust simultaneously the resonance point of reactor and capacitor, in order to filtering 5 times, 7 times or need the harmonic wave of filtering, reach the purpose of filtering compensation.

In sum, be preferred embodiment of the present utility model only, be not to be used for limiting practical range of the present utility model, promptly all equivalences of doing according to the content of the utility model claim change and modify, and all should be technology category of the present utility model.

Claims

1. miniature energy-saving filtering/compensation arrangement, it is characterized in that: it has a shell, has filter unit in the shell; The controllable silicon noncontacting switch that this filter unit is made up of air switch, three bidirectional triode thyristors, adopt the reactor of ultramicro-crystal alloy made and the three-phase capacitor of 30Kvar to be composed in series.

2. miniature energy-saving filtering/compensation arrangement according to claim 1 is characterized in that: the AB phase of described three-phase corner connection capacitor, BC phase, alternate discharge indicator light binding post A, B, the C that inserts discharge resistance respectively and draw of AC.

3. miniature energy-saving filtering/compensation arrangement according to claim 1 and 2 is characterized in that: in the described shell radiator fan is housed.