CN201726126U - High voltage passive electric filtering protection and compensation system - Google Patents

Abstract

The utility model discloses a high voltage passive electric filtering protection and compensation system. The system comprises a residual voltage protection circuit, a voltage filtering circuit, a suppression control circuit, a discharging circuit and a surge protection circuit. Surge, transient and high order harmonic interference commonly existing in high voltage power supply lines is effectively eliminated by a multi-stage suppression assembly. Pulsating current is reduced, distortion power consumption and large quantity of copper and iron losses resulting from inductive load current losses and temperature rise are reduced, line losses are largely reduced, and the influence of skin effect on power utilization efficiency is reduced. Meanwhile, energy losses due to contact resistor increase can be effectively avoided, magnetic hysteresis effect and eddy phenomena in a transformer and a motor are reduced, the effective capacities of the transformer and motor are improved, equipment radiation is reduced, and power utilization efficiency is improved.

Description

High pressure passive electric filtering protection bucking-out system

Technical field

The utility model relates to the electric power energy-saving environmental technology field, more particularly, relates to high pressure passive electric filtering protection bucking-out system.

Background technology

At present, the scope of application of high-tension apparatus has covered each main industries of China basically, as: electric power, municipal water supply, metallurgy, oil, chemical industry, mining, coal, papermaking, building materials or the like.Various non-linear electrical equipments are the main causes that produce harmonic wave, because the harmonic current that non-linear equipment produces is injected in the system power supply by grid, distortion current distorts busbar voltage through system impedance, and the quality of power supply is polluted.As the converter of the coreless induction furnace of chemical industry, electrolysis installation, steel industry, large-sized rolling mills, silicon rectifying equipment, they produce harmonic current injected system for several times when electrical network is taken fundamental current.The feature that the harmonic wave of these loads does not change with different loads, thus make the harmonic current that injects network suddenly big or suddenly small, flickering phenomenon occur.

A large amount of harmonic waves that the harmonic wave of high-pressure side produces from load equipment on the one hand are that network system is followed and other next harmonic waves in the outside on the other hand.The harm of harmonic wave is very serious, and the efficient of production, transmission and the utilization of electric energy is reduced, and makes device of overheating of electrical, produces vibration and noise, and make ageing of insulation, and shorten useful life, even breaks down or burn.Harmonic wave can cause local parallel resonance of electric power system or series resonance, and harmonic content is amplified, and causes equipment burnouts such as capacitor.Harmonic wave also can cause relaying protection and automatics misoperation, and electric energy metrical is caused confusion.For the electric power system outside, harmonic wave can produce serious interference to communication equipment and electronic equipment.

The utility model content

In view of this, the utility model provides high pressure passive electric filtering protection bucking-out system, and the function to realize the harmonic wave in the high-tension electricity is filtered improves utilization rate of electrical.

For achieving the above object, the utility model provides following technical scheme:

A kind of high pressure passive electric filtering protection bucking-out system comprises: residual voltage protective circuit, voltage filter circuit, inhibition control circuit, discharge loop circuit, surge protection circuit, wherein,

Described residual voltage protective circuit comprises:

Three utmost point discharge tubes, the first filter reactance resistance and the residual voltage discharge resistance of mutual series connection, wherein, described three utmost point discharge tube inputs link to each other with high voltage source, described residual voltage discharge resistance two ends are parallel with two residual voltage controllers, and the first residual voltage controller positive pole links to each other with the negative pole of the second residual voltage controller;

Described inhibition circuit comprises:

First silicon piezo-resistance of mutual series connection and inhibition diode, wherein, described bidirectional diode input links to each other with described three utmost point discharge tubes;

Described voltage filter circuit comprises:

The second filter reactance resistance and first electric capacity of mutual series connection, the described second filter reactance resistance input links to each other with described high voltage source;

Described discharge loop circuit comprises:

Second electric capacity, the second silicon piezo-resistance and the gas discharge tube of mutual series connection, wherein, the described second electric capacity input links to each other with described high voltage source;

Described surge protection circuit comprises:

The 3rd electric capacity parallel with one another, two utmost point discharge tube and piezo-resistances, wherein, described the 3rd electric capacity input links to each other with the output of described second electric capacity.

Preferably, in said system, described residual voltage controller is an one-way SCR.

Preferably, in said system, described inhibition diode is a bidirectional diode.

Adopt technique scheme, high pressure passive electric filtering protection bucking-out system comprises: residual voltage protective circuit, voltage filter circuit, inhibition control circuit, discharge circuit, surge protection circuit.Adopt multistage inhibition assembly, effectively remove the ubiquitous surge of high voltage supply circuit, transition, high order harmonic component is disturbed, reduce pulsating current, reduce the distortion power consumption and because a large amount of copper loss that inductive load current loss and temperature rising cause, iron loss, significantly reduce line loss, reduce the influence of kelvin effect (Skin Effect) to power consumption efficiency, the energy loss that can prevent the increase of contact resistance effectively simultaneously and bring, reduce transformer and motor internal and produced hysteresis effect and vortex phenomenon, improved the available capacity of transformer and motor, reduce equipment heating, reduced loss, promoted utilization of power efficient.

Simultaneously, high pressure passive electric filtering protection bucking-out system can be removed electric network pollution, avoids the accident of power supply that causes therefrom, protects equipment effectively, reduces the loss that a large amount of maintenance of equipment expenses, depreciation of equipment and production efficiency reduction cause.Protection equipment is avoided the frequent impact of thunder and lightning, transition, high order harmonic component and surge, reduces the equipment operation temperature, increases the service life, and effectively promotes efficiency, significantly reduces the equipment operation cost.

Description of drawings

In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.

The high pressure passive electric filtering protection bucking-out system schematic diagram that Fig. 1 provides for the utility model embodiment;

The high pressure passive electric filtering protection bucking-out system scheme of installation that Fig. 2 provides for the utility model embodiment.

Embodiment

Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.

The utility model provides high pressure passive electric filtering protection bucking-out system, with the function that realizes the harmonic wave in the high-tension electricity is filtered.

As shown in Figure 1, high pressure passive electric filtering protection bucking-out system is made up of residual voltage protective circuit, voltage filter circuit, inhibition control circuit, discharge loop circuit, five branch roads of surge protection circuit.

Wherein, the residual voltage protective circuit comprises:

Three utmost point discharge tubes, the first filter reactance resistance and the residual voltage discharge resistance of mutual series connection, wherein, described three utmost point discharge tube inputs link to each other with high voltage source, described residual voltage discharge resistance two ends are parallel with two residual voltage controllers, and the first residual voltage controller positive pole links to each other with the negative pole of the second residual voltage controller.

The residual voltage controller: be a kind of controlled rectification electronic component, externally become conducting by shutoff under the control signal effect, in case but conducting, external signal just can't make its shutoff, can only make its shutoff by removing load or reducing its both end voltage.One-way SCR is a kind of of residual voltage controller, and specifically four layers of three-terminal semiconductor device being made up of three PN junction PNPN are compared with the diode with a PN junction, the controlled electrode current control of one-way SCR forward conduction; Compare with the triode with two PN junctions, difference is that the control electrode current is not had amplification.

Suppressing circuit comprises:

First silicon piezo-resistance of mutual series connection and inhibition diode, wherein, the bidirectional diode input links to each other with described three utmost point discharge tubes.

Silicon piezo-resistance: be that a kind of resistance value is along with the responsive resistor that changes of applied voltage, main application is the absorption of perception, inhibition and surge energy to abnormal overvoltage, after overvoltage surge disappears, return to high-impedance state again rapidly, guarantee the operate as normal of circuit.

Suppress diode: also claiming transient voltage to suppress diode (TVS), is a kind of over-voltage protector with bi-directional voltage stabilizing characteristic and two-way negative resistance charactertistic, is similar to varistor.It is applied to be used for suppressing transient overvoltage in various interchanges and the DC power supply circuit.When the surge pulse voltage appearred in protected circuit moment, diac is Zener breakdown rapidly, becomes low resistive state by high-impedance state, surge voltage is shunted and clamp, thereby in the protective circuit each element not by moment the surge pulse voltage damage.In circuit, represent with alphabetical VD or V.

Suppressing diode and have clamp pressure limiting function. it is to be operated in the reverse breakdown district. because it has the low and fast advantage of action response of clamping voltage.Be especially suitable for use as the most last what protection component in the multi-stage protection circuit.Transient voltage suppresses diode (TVS) can be not breakdown, and it can reduce resistance when voltage is high, thereby make the electric current shunting or control its flow direction, thereby the protective circuit element is not burnt under the too high situation of transient voltage.

The voltage filter circuit comprises:

The second filter reactance resistance and first electric capacity of mutual series connection, the described second filter reactance resistance input links to each other with described high voltage source.

Discharge loop comprises:

Second electric capacity, the second silicon piezo-resistance and the gas discharge tube of mutual series connection, wherein, the described second electric capacity input links to each other with described high voltage source.

Surge protection circuit comprises:

The 3rd electric capacity parallel with one another, two utmost point discharge tube and piezo-resistances, wherein, described the 3rd electric capacity input links to each other with the output of described second electric capacity.

Piezo-resistance: the maximum characteristics of piezo-resistance are the voltage above being added in it when being lower than its threshold values " UN ", and the electric current that flows through it is minimum, is equivalent to one and closes dead valve, and when voltage surpassed UN, the electric current that flows through it increased sharply, and is equivalent to valve open.Utilize this function, can suppress the frequent abnormal overvoltage that occurs in the circuit, protective circuit is avoided superpotential infringement.

Gas discharge tube: adopt ceramic enclosed package, inner metal electrode by two or several band gaps fills with inert gas (argon gas or neon) and constitutes.When the voltage that is added to two electrode tips reached the gas breakdown that makes in the gas discharge tube, gas discharge tube just began discharge, and became low-resistance by high resistant, made the voltage at electrode two ends be no more than puncture voltage.

Surge protection circuit generally is made up of secondary or three grades, utilizes the characteristics of various surge suppression devices, can realize reliably protecting.Gas discharge tube generally is placed on line input, as the one-level device of surge protector, bears big surge current.The second class protection device adopts piezo-resistance, response quickly in μ s level time range.For high-sensitive electronic circuit, can adopt three-level protective device TVS, in ps level time range, surge voltage is produced response.When surges such as thunder and lightning arrived, TVS at first started, and can accurately be controlled at certain level to transient overvoltage; If surge current is big, then piezo-resistance starting, and certain surge current of releasing; The voltage at two ends can increase, and until the discharge that promotes the prime gas discharge tube, big current drain is arrived ground.

As shown in Figure 2, when practical application, behind access high voltage source L1, L2, the L3, five circuit of equipment are brought into play function separately respectively.Surge protection circuit is released at the surge in the electrical network; Discharge circuit is responsible for discharging transition; Suppress control circuit as the term suggests play the effect that suppresses surge, transition, harmonic wave; Harmonic pollution in the voltage filter circuit filtering electrical network; The residual voltage protective circuit mainly is avoid the being struck by lightning impact of pulse voltage waveform of protection electrical network, exports PE to after foregoing circuit is handled.

Adopt technique scheme, high pressure passive electric filtering protection bucking-out system comprises: residual voltage protective circuit, voltage filter circuit, inhibition control circuit, discharge circuit, surge protection circuit.Adopt multistage inhibition assembly, effectively remove the ubiquitous surge of high voltage supply circuit, transition, high order harmonic component is disturbed, reduce pulsating current, reduce the distortion power consumption and because a large amount of copper loss that inductive load current loss and temperature rising cause, iron loss, significantly reduce line loss, reduce the influence of kelvin effect (Skin Effect) to power consumption efficiency, the energy loss that can prevent the increase of contact resistance effectively simultaneously and bring, reduce transformer and motor internal and produced hysteresis effect and vortex phenomenon, improved the available capacity of transformer and motor, reduce equipment heating, reduced loss, promoted utilization of power efficient.

Simultaneously, high pressure passive electric filtering protection bucking-out system can be removed electric network pollution, avoids the accident of power supply that causes therefrom, protects equipment effectively, reduces the loss that a large amount of maintenance of equipment expenses, depreciation of equipment and production efficiency reduction cause.Protection equipment is avoided the frequent impact of thunder and lightning, transition, high order harmonic component and surge, reduces the equipment operation temperature, increases the service life, and effectively promotes efficiency, significantly reduces the equipment operation cost.

To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the utility model.Multiple modification to these embodiment will be conspicuous concerning those skilled in the art, and defined herein General Principle can realize under the situation that does not break away from spirit or scope of the present utility model in other embodiments.Therefore, the utility model will can not be restricted to these embodiment shown in this article, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.

Claims (3)

1. a high pressure passive electric filtering protection bucking-out system is characterized in that, comprising: residual voltage protective circuit, voltage filter circuit, inhibition control circuit, discharge loop circuit, surge protection circuit, wherein,

Described residual voltage protective circuit comprises:

Three utmost point discharge tubes, the first filter reactance resistance and the residual voltage discharge resistance of mutual series connection, wherein, described three utmost point discharge tube inputs link to each other with high voltage source, described residual voltage discharge resistance two ends are parallel with two residual voltage controllers, and the first residual voltage controller positive pole links to each other with the negative pole of the second residual voltage controller;

Described inhibition control circuit comprises:

First silicon piezo-resistance of mutual series connection and inhibition diode, wherein, described bidirectional diode input links to each other with described three utmost point discharge tubes;

Described voltage filter circuit comprises:

The second filter reactance resistance and first electric capacity of mutual series connection, the described second filter reactance resistance input links to each other with described high voltage source;

Described discharge loop circuit comprises:

Second electric capacity, the second silicon piezo-resistance and the gas discharge tube of mutual series connection, wherein, the described second electric capacity input links to each other with described high voltage source;

Described surge protection circuit comprises:

The 3rd electric capacity parallel with one another, two utmost point discharge tube and piezo-resistances, wherein, described the 3rd electric capacity input links to each other with the output of described second electric capacity.

2. system according to claim 1 is characterized in that, described residual voltage controller is an one-way SCR.

3. system according to claim 2 is characterized in that, described inhibition diode is a bidirectional diode.

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