CN201328068Y - Mineral flame-proof type transducer electromagnetic compatibility system - Google Patents
Mineral flame-proof type transducer electromagnetic compatibility system Download PDFInfo
- Publication number
- CN201328068Y CN201328068Y CNU2008202300975U CN200820230097U CN201328068Y CN 201328068 Y CN201328068 Y CN 201328068Y CN U2008202300975 U CNU2008202300975 U CN U2008202300975U CN 200820230097 U CN200820230097 U CN 200820230097U CN 201328068 Y CN201328068 Y CN 201328068Y
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- lead
- frequency converter
- transducer
- electromagnetic compatibility
- filter
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Abstract
The utility model discloses a mineral flame-proof type transducer electromagnetic compatibility system. An isolating switch induces a three-phase AC power into a flame-proof cavity; the isolating switch is connected with an input reactor through a lead; the input reactor is connected with an input filter through a lead; the input filter is connected with a transducer through a lead; the transducer is connected with an output reactor through a lead; the output reactor is connected with an output filter through a lead; the isolating switch is connected with an ultraharmonics automatic monitor through a lead; the ultraharmonics automatic monitor is connected with an intelligent comprehensive protector through a lead; the intelligent comprehensive protector is connected with the transducer through a lead; and the output filter is connected with the ultraharmonics automatic monitor through a lead. An electromagnetic compatibility device and the transducer are arranged in the same flame-proof cavity; the flame-proof cavity is used as the electromagnetic shield of the transducer and the electromagnetic compatibility device to reduce the outward radiation disturbance of the transducer and the electromagnetic compatibility device; in addition, the shortest connection line is ensured between the electromagnetic compatibility device and the transducer, so as to have the better filter effect.
Description
Technical field
The utility model belongs to a kind of flame-proof mine frequency converter electromagnetic compatibility scheme, particularly a kind of electromagnetic compatibility system that uses high order harmonic component routine and intelligent comprehensive protector.
Background technology
In the field, colliery, Inverter Application has begun to popularize at present, but uses frequency converter and the electromagnetic interference brought is very important.Frequency converter is a nonlinear load to electrical network, to electrical network output higher harmonic current, causes that line voltage distortion and current distortion cause electromagnetic pollution, influence other electronic electric equipment operate as normal on the electrical network; Frequency converter also has the danger of detonator circuit resonance to the higher harmonic current of electrical network output.The output of frequency converter is the Sine Pulse Width Modulation wave voltage, is contour not wide square wave, contains abundant high order harmonic, and motor operation is caused the increase loss, increases Harmonic Extra Torque, vibration, overheated and reduction influence such as exert oneself.The general Capacity Ratio in mobile substation is less under the coal mine, even if use voltage distortion THDv that less frequency converter causes in the system also at 10%-40%, the colliery down-hole application a lot of important electron electric equipments, these electronic electric equipments generally comprise cpu chip and program software, very easily are subjected to electromagnetic interference and cisco unity malfunction.Therefore, mine-used frequency-converter being increased electromagnetic compatibility is very important.
Summary of the invention
It is good that the purpose of this utility model provides a kind of flame-proof mine frequency converter electromagnetic compatibility, the flame-proof mine frequency converter electromagnetic compatibility system that anti-electromagnetic interference capability is strong.
For achieving the above object; solution of the present utility model is: a kind of flame-proof mine frequency converter electromagnetic compatibility system; by explosion-proof chamber; isolating switch; the input reactance device; input filter; frequency converter; output filter; out put reactor; the high order harmonic component routine; the intelligent comprehensive protector is formed; described isolating switch is introduced explosion-proof chamber with three-phase alternating-current supply; described isolating switch is connected with the input reactance device by lead; described input reactance device is connected with input filter by lead; described input filter is connected with frequency converter by lead; described frequency converter is connected with out put reactor by lead; described out put reactor is connected with output filter by lead; described isolating switch is connected with the high order harmonic component routine by lead; described high order harmonic component routine is connected with the intelligent comprehensive protector by lead; described intelligent comprehensive protector is connected with frequency converter by lead, and described output filter is connected with the high order harmonic component routine by lead.
Electromagnetic compatibility device and frequency converter are installed in the same explosion-proof chamber, and explosion-proof chamber reduces the outside auxilliary blackberry lily of frequency converter and electromagnetic compatibility device and disturbs as the electromagnetic shield of frequency converter and electromagnetic compatibility device; And make electromagnetic compatibility device and frequency converter that the shortest line be arranged, make filter effect better.For the final serious electromagnetic interference of eliminating frequency converter to other important electronic electric equipment equipment; avoid having an accident; device is provided with high order harmonic component routine and intelligent comprehensive protector; by real-time detection of grid three-phase current and three-phase voltage; calculate the each harmonic content of current/voltage in real time through the sliding window iteration harmonic wave detection algorithm of discrete Fourier transform (DFT); when frequency converter reaches intolerable degree to the electromagnetic interference of other important electronic electric equipment, frequency converter out of service.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment.
Embodiment
As shown in Figure 1, isolating switch 1 is introduced explosion-proof chamber with three-phase alternating-current supply, described isolating switch 1 is connected with input reactance device 2 by lead, described input reactance device 2 is connected with input filter 3 by lead, described input filter 3 is connected with frequency converter 4 by lead, described frequency converter 4 is connected with out put reactor 5 by lead, and described out put reactor 5 is connected with output filter 6 by lead.Described isolating switch 1 is connected with high order harmonic component routine 7 by lead, and described high order harmonic component routine 7 is connected with intelligent comprehensive protector 8 by lead, and described intelligent comprehensive protector 8 is connected with frequency converter 4 by lead.Described output filter 6 is connected with high order harmonic component routine 7 by lead.
The utility model is made up of major loop and protection loop; wherein isolating switch 1, input reactance device 2, input filter 3, frequency converter 4, out put reactor 5, output filter 6 constitute major loop; high order harmonic component routine 7, intelligent comprehensive protector 8 constitute to detect protects the loop; input reactance device 2 is connected with input filter 3 by lead; constitute input filtering part; be used to reduce frequency converter to the interference of the interference of electrical network and electrical network, have simultaneously and weaken the effect that input is shoved frequency converter.Out put reactor 5 is connected with output filter 6 by lead, constitutes output filtering part, is used to reduce the interference of frequency converter to motor, has the effect that weakens electromagnetic radiation simultaneously.Isolating switch 1 is connected with high order harmonic component routine 7 by lead, the harmonic signal of the input that is used to take a sample.Output filter 6 is connected with high order harmonic component routine 7 by lead, the harmonic signal of the output that is used to take a sample.Harmonic signal is handled computing through high order harmonic component routine and intelligent comprehensive protector, and when electromagnetic interference reached intolerable degree, frequency converter out of service reached the protective circuit purpose of safety.
The filter action of input reactance device 2 and input filter 3 is two-way, promptly reduces the energy of frequency converter to electrical network conduction high order harmonic component signal, reduces the energy of electrical network to frequency converter conduction high order harmonic component signal again.The filter action of out put reactor 5 and output filter 6 reduces the high order harmonic component signal energy of frequency converter to motor output.High order harmonic component routine 7 is the voltage and current harmonic content of the input of monitoring frequency converter, outlet side in real time; but the permissible value software set of each harmonic content; limiting value when the voltage and current high order harmonic component overshoot of monitoring point; to send signal and make 8 actions of intelligent comprehensive protector, frequency converter can be protected tripping operation.
Claims (1)
1. flame-proof mine frequency converter electromagnetic compatibility system; by explosion-proof chamber; isolating switch; the input reactance device; input filter; frequency converter; output filter; out put reactor; the high order harmonic component routine; the intelligent comprehensive protector is formed; it is characterized in that: described isolating switch (1) is introduced explosion-proof chamber with three-phase alternating-current supply; described isolating switch (1) is connected with input reactance device (2) by lead; described input reactance device (2) is connected with input filter (3) by lead; described input filter (3) is connected with frequency converter (4) by lead; described frequency converter (4) is connected with out put reactor (5) by lead; described out put reactor (5) is connected with output filter (6) by lead; described isolating switch (1) is connected with high order harmonic component routine (7) by lead; described high order harmonic component routine (7) is connected with intelligent comprehensive protector (8) by lead; described intelligent comprehensive protector (8) is connected with frequency converter (4) by lead, and described output filter (6) is connected with high order harmonic component routine (7) by lead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202300975U CN201328068Y (en) | 2008-12-15 | 2008-12-15 | Mineral flame-proof type transducer electromagnetic compatibility system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202300975U CN201328068Y (en) | 2008-12-15 | 2008-12-15 | Mineral flame-proof type transducer electromagnetic compatibility system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201328068Y true CN201328068Y (en) | 2009-10-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202300975U Expired - Fee Related CN201328068Y (en) | 2008-12-15 | 2008-12-15 | Mineral flame-proof type transducer electromagnetic compatibility system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201328068Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103201919A (en) * | 2010-07-20 | 2013-07-10 | 恩普里默斯有限责任公司 | Sensing and control electronics for a power grid protection system |
| CN112039357A (en) * | 2019-06-04 | 2020-12-04 | 四川长江飞瑞能源科技有限公司 | Solar photovoltaic power generation pumping irrigation off-grid boosting and voltage reducing transmission control system |
-
2008
- 2008-12-15 CN CNU2008202300975U patent/CN201328068Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103201919A (en) * | 2010-07-20 | 2013-07-10 | 恩普里默斯有限责任公司 | Sensing and control electronics for a power grid protection system |
| CN103201919B (en) * | 2010-07-20 | 2016-08-17 | 恩普里默斯有限责任公司 | Sensing for electric network protection system controls electronic equipment and self-testing method |
| CN112039357A (en) * | 2019-06-04 | 2020-12-04 | 四川长江飞瑞能源科技有限公司 | Solar photovoltaic power generation pumping irrigation off-grid boosting and voltage reducing transmission control system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091014 Termination date: 20111215 |