CN208241320U - Electrical Harmonic Detection and inhibition device - Google Patents
Electrical Harmonic Detection and inhibition device Download PDFInfo
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- CN208241320U CN208241320U CN201820714093.8U CN201820714093U CN208241320U CN 208241320 U CN208241320 U CN 208241320U CN 201820714093 U CN201820714093 U CN 201820714093U CN 208241320 U CN208241320 U CN 208241320U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
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Abstract
The utility model discloses a kind of electrical Harmonic Detection and inhibit device, including system power supply, three-phase four-wire system power load, electrical harmonics restraint unit, control system；Voltage transformer is connected between system power supply and electrical harmonics restraint unit, voltage transformer output end is connected to the system voltage sample port of control system；It is installed with load current mutual-inductor between electrical harmonics restraint unit and three-phase four-wire system power load, the output end of load current mutual-inductor is connected to the load current sample port of control system；The PWM drive signal port of control system is connected to the driving circuit of electrical harmonics restraint unit.The early warning to electrical harmonic wave may be implemented using the sampled data of load current, system voltage in the utility model；By inhibiting unit, the inhibition to electrical harmonic wave may be implemented；The probability of happening of electrical fire can be effectively reduced in terms of inhibition two before early warning before calamity and calamity.
Description
Technical field
The utility model relates to a kind of electrical Harmonic Detection and inhibit device, more particularly to a kind of for electrical fire safety
The detection of the electrical harmonic wave of one of hidden danger and inhibition device.
Background technique
With the rapid development of social economy, the reasons such as social electrifing degree is continuously improved, and power load is excessive cause
Electrical fire generation is more and more frequent, and fire quantity is in rising trend.Integrated data statistics display electrical fire is in fire entirety
30% or more is accounted in quantity, especially more flourishing place, this data can rise to 50%.The reason of electrical fire master
Have following several: overload, insulation ag(e)ing, discharge spark, illuminator electric heater, crosses under-voltage, is non-linear negative hot-spot
Lotus etc..Wherein due to caused by the presence of electrical harmonic wave result have: power factor is low, leads to circuit overload, makes compensating electric capacity
Electric current increase, formed overheated type fire hazard；Malfunction overcurrent protective device or residual current operated protective device；3 subharmonic shapes
The neutral conductor is caused to overload at current in middle wire；Certain harmonic forms forms high current, high voltage at series connection or shunt-resonant circuit；It produces
Myogenic skin effect increases cable temperature, accelerates insulating layer aging.It can be seen that electrical harmonic wave is the root of essential electrical fire
Source, to reduce the hidden danger of electrical fire from the root it is necessary to doing from electrical harmonic wave early warning and inhibition.
Electrical Harmonic Detection carries out technology analysis by the sampled data to system voltage and load current with device is inhibited,
The electrical harmonic content for calculating load circuit gives exceeded early warning according to electrical harmonic content definite value；Using modern electric electricity
Sub- device, inversion go out the harmonic wave equal with load opposite in phase quantity and offset therewith, it is suppressed that the electrical harmonic wave of system reduces
Because of the security risk of electrical fire caused by electrical harmonic wave exists.By inhibiting harmonic wave to reduce the skin effect of harmonic current
It answers, slows down electric insulation aging, reduce cable temperature rise, the generation that the danger and equipment malfunction for reducing system resonance are made is general
Rate.Electrical Harmonic Detection and the early warning for inhibiting device and the generation for inhibiting function to reduce electrical fire in electrical harmonic wave root are general
Rate.
Electrical Harmonic Detection and inhibition device are to reduce one of the important means of electrical fire security risk, are not had in fire
The generation for inhibiting fire before occurring, is preventive from possible trouble；And there is data analysis function, for the electricity that can cause electrical fire
Tolerance mutation, can play certain forewarning function.
Summary of the invention
The purpose of this utility model is that reduce because in power load there are electrical harmonic wave due to the electric disaster hidden-trouble that causes,
Early warning and inhibiting effect played to electrical harmonic wave present in power load, reduces the electrical harmonic wave in power load, reduce because
The electrical fires root such as electric cable heating, insulation ag(e)ing, system resonance caused by skin effect.
The technical scheme adopted by the utility model to solve the technical problem is as follows:
The electrical Harmonic Detection and inhibition device, is connected including system power supply, with the output end of system power supply
Three-phase four-wire system power load, the electrical harmonics restraint unit being attempted by between system power supply and power load.
System voltage mutual inductor, the output of voltage transformer are connected between system power supply and electrical harmonics restraint unit
End is connected to the system voltage sample port of control system；
Load current mutual-inductor, load current are installed between three-phase four-wire system power load and electrical harmonics restraint unit
The output end of mutual inductor is connected to the load current sample port of control system；
It is defeated equipped with alarm communication system port, system voltage sample port, load current sample port, PWM in the controls
Exit port, output current sample port, DC voltage sample port；The pwm pulse output signal port of control system directly connects
It is connected to the driving circuit of electrical harmonics restraint unit.
Further preferred, the electrical harmonics restraint unit is by output reactance device, by insulated gate bipolar crystal
The capacitor of three phase full bridge inversion unit, two groups of concatenations that pipe IGBT is constituted forms；In output reactance device and three phase full bridge inversion list
It is worn between member and is connected to output current transformer, the output end of output current transformer is connected to the output current sample of control system
Port；The DC side of three phase full bridge inversion unit connects the capacitor of two groups of concatenations, is connected with the midpoint of the capacitor of two groups of concatenations
It is zero curve n, the positive and negative both ends of the capacitor of two groups of concatenations are connected to DC voltage transformer, and the output end of DC voltage transformer connects
It is connected to the DC voltage sample port of control system.
Beneficial effect possessed by the utility model is:
A kind of electrical Harmonic Detection described in the utility model and inhibition device, have early warning electrical fire, inhibit electricity consumption
The function of electrical harmonic wave in load, functionally early warning prompt the hidden danger emphasis of electrical fire；Inhibit from the root, reduces
Cable temperature rise, the emphasis hidden danger for slowing down the electrical fires such as insulation ag(e)ing, removal system resonance.
Detailed description of the invention
Fig. 1: the circuit system of the utility model.
Fig. 2: the electrical harmonics restraint unit main circuit of the utility model.
In figure: 1, three-phase four-wire system power load, 2, electrical harmonics restraint unit, 3, control system, 4, system voltage it is mutual
Sensor, 5, load current mutual-inductor, 6, three-phase four-wire system power supply, 7, driving circuit, 8, DC voltage transformer, 9, output
Reactor, 10, output current transformer, the capacitor of 11, two groups of concatenations, 12, three phase full bridge inversion unit.
Specific embodiment
With reference to the accompanying drawing with specific implementation example the utility model is described in further detail: this embodiment with
Implemented under premised on technical solutions of the utility model, gives embodiment and operating process, but the guarantor of the utility model
Shield range is not limited to the following embodiments.
Fig. 1 be the utility model proposes electrical Harmonic Detection and inhibit the system structure diagram of device, including three-phase four
Line system power supply 6, the three-phase four-wire system power load 1 being connected with the output end of three-phase four-wire system power supply 6, is attempted by
Electrical harmonics restraint unit 2 between three-phase four-wire system power supply 6 and three-phase four-wire system power load 1, control system 3 are
System voltage transformer 4, load current mutual-inductor 5, driving circuit 7, DC voltage transformer 8；
In the present embodiment, system voltage is connected between three-phase four-wire system power supply 6 and electrical harmonics restraint unit 2
Mutual inductor 4, the output end of system voltage mutual inductor 4 are connected to the system voltage sample port of control system 3；
In the present embodiment, it is mutual between three-phase four-wire system power load 1 and electrical harmonics restraint unit 2 to be installed with load current
Sensor 5, the output end of load current mutual-inductor 5 are connected to the load current sample port of control system 3；
In the present embodiment, adopted in control system 3 equipped with alarm communication system port, system voltage sample port, load current
Sample port, PWM output port, output current sample port, DC voltage sample port；
In the present embodiment, the pwm pulse output signal port of control system 3 is directly connected to electrical harmonics restraint unit 2
Driving circuit.
The electrical harmonics restraint unit 2 (as shown in Figure 2) is by output reactance device 9, by insulated gate bipolar crystal
The capacitor 11 of 12, two groups of concatenations of three phase full bridge inversion unit that pipe IGBT is constituted forms；It is inverse in output reactance device 9 and three phase full bridge
Become between unit 12 to wear and be connected to output current transformer 10, the output end of output current transformer 10 is connected to control system 3
Export current sample port；The DC side of three phase full bridge inversion unit 12 connects the capacitor 11 of two groups of concatenations, concatenates with two groups
That the midpoint of capacitor 11 is connected is zero curve n, and the positive and negative both ends of the capacitor 11 of two groups of concatenations are connected to DC voltage transformer 8, directly
The output end of stream voltage transformer 8 is connected to the DC voltage sample port of control system 3.
The utility model is directed to the status that current electrical fire accident is growing, for the electrical harmonic wave in power load
The hidden danger place of the discovery electrical fire of early warning in time is capable of in progress detection alarm and inhibition；And it is effectively reduced because electrical harmonic wave is deposited
The electricity such as the cable temperature rise caused by is excessively high, current in middle wire is excessive, insulation ag(e)ing is fast, Harmonious Waves in Power Systems resonance, system overvoltage
Gas fire incident；The fire hazard of electric fire-control is solved from the root of electrical harmonic wave.
Claims (2)
1. a kind of electrical Harmonic Detection and inhibit device, including it is system power supply (6), three-phase four-wire system power load (1), electrical humorous
Wave inhibits unit (2), control system (3)；It is characterized by: electrical harmonics restraint unit (2) is attempted by system power supply (6) and three
Between phase four-wire system power load (1)；System voltage is connected between system power supply (6) and electrical harmonics restraint unit (2)
Mutual inductor (4), the output end of system voltage mutual inductor (4) are connected to the system voltage sample port of control system (3)；In three-phase
Load current mutual-inductor (5), load current mutual inductance are installed between four-wire system power load (1) and electrical harmonics restraint unit (2)
The output end of device (5) is connected to the load current sample port of control system (3)；
Alarm communication system port, system voltage sample port, load current sample port, PWM output are equipped in control system (3)
Port, output current sample port, DC voltage sample port；The pwm pulse output signal port of control system (3) directly connects
It is connected to the driving circuit of electrical harmonics restraint unit (2).
2. electrical Harmonic Detection according to claim 1 and inhibition device, it is characterised in that: the electrical harmonics restraint
Unit (2) be by output reactance device (9), the three phase full bridge inversion unit (12) being made of insulated gate bipolar transistor IGBT,
The capacitor (11) of two groups of concatenations forms；It is worn between output reactance device (9) and three phase full bridge inversion unit (12) and is connected to output electricity
Current transformer (10), the output end of output current transformer (10) are connected to the output current sample port of control system (3)；Three
The DC side of phase full-bridge inverting unit (12) connects the capacitor (11) of two groups of concatenations, with the midpoint phase of two groups of capacitors concatenated (11)
That connect is zero curve n, and the positive and negative both ends of the capacitor (11) of two groups of concatenations are connected to DC voltage transformer (8), DC voltage mutual inductance
The output end of device (8) is connected to the DC voltage sample port of control system (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820714093.8U CN208241320U (en) | 2018-05-15 | 2018-05-15 | Electrical Harmonic Detection and inhibition device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820714093.8U CN208241320U (en) | 2018-05-15 | 2018-05-15 | Electrical Harmonic Detection and inhibition device |
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| Publication Number | Publication Date |
|---|---|
| CN208241320U true CN208241320U (en) | 2018-12-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820714093.8U Active CN208241320U (en) | 2018-05-15 | 2018-05-15 | Electrical Harmonic Detection and inhibition device |
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| CN (1) | CN208241320U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108390385A (en) * | 2018-05-15 | 2018-08-10 | 河南瑞孚沃科技有限公司 | Electrical Harmonic Detection and restraining device and method |
-
2018
- 2018-05-15 CN CN201820714093.8U patent/CN208241320U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108390385A (en) * | 2018-05-15 | 2018-08-10 | 河南瑞孚沃科技有限公司 | Electrical Harmonic Detection and restraining device and method |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder |
Address after: 45 000 1 Three-storey East of Building B, No. 2 Venture Center, Ruida Road, High-tech Zone, Zhengzhou City, Henan Province Patentee after: Henan Fortune Technology Co., Ltd. Address before: 450016 3rd floor, No. 5 Building, 19 13th Street, Zhengzhou District, Henan Free Trade Experimental Zone, Zhengzhou City, Henan Province Patentee before: Henan Fortune Technology Co., Ltd. |
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| CP02 | Change in the address of a patent holder |