CN201637768U - Single-phase single-tube voltage sag generating device of series resonance type - Google Patents
Single-phase single-tube voltage sag generating device of series resonance type Download PDFInfo
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- CN201637768U CN201637768U CN2009202155938U CN200920215593U CN201637768U CN 201637768 U CN201637768 U CN 201637768U CN 2009202155938 U CN2009202155938 U CN 2009202155938U CN 200920215593 U CN200920215593 U CN 200920215593U CN 201637768 U CN201637768 U CN 201637768U
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- tube voltage
- voltage dip
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Abstract
The utility model relates to a single-phase single-tube voltage sag generating device of a series resonance type, analyzing and improving a bidirectional power switch module and reducing the element numbers of a main circuit and a control circuit without a transformer. For achieving the aim, the utility model employs the technical scheme that the single-phase single-tube voltage sag generating device of the series resonance type comprises an adjustable single-pulse generator the output end of which is connected with an adjustable duty cycle pulse generating circuit, and the output end of the adjustable duty cycle pulse generating circuit is sequentially connected with an optically-coupled PWM (Pulse Width Modulation) driving circuit, a single-phase single-tube alternating current chopper and an LC filter of the series resonance type. Because of employing the technical scheme, the single-phase single-tube voltage sag generating device of the series resonance type employs a single IGBT (Insulated Gate Bipolar Transistor) and an auxiliary circuit instead so that the element numbers of the main circuit and the control circuit are reduced, the circuits are simplified, the cost is decreased, and the reliability of the device is improved.
Description
Technical field
The utility model relates to a kind of quality of power supply sensitivity tests equipment that is used for the Monophase electric power load equipment, relates in particular to the single-phase single tube voltage dip of a kind of series resonance-type generating means.
Background technology
Since the eighties in 20th century, along with the widespread use of the responsive power electronic equipment of modernization and developing rapidly of novel electric power load, the dynamic power quality problem receives publicity day by day, and one of wherein outstanding, that cost is bigger problem is exactly a voltage dip.Investigation according to external certain power department: in the customer complaint that causes by the quality of power supply, complaint＞70% that causes by voltage dip, and complaint＜30% that causes by harmonic wave, switching manipulation superpotential etc.The economic loss that the U.S. is caused by voltage dip every year is 120～26,000,000,000 dollars.Therefore, only consider that steady state voltage quality index such as harmonic wave, power frequency variation, three-phase imbalance, voltage deviation can not satisfy modern electric user's requirement.The research of this direction of voltage dip more and more causes electric power scientific worker's very big concern.
Voltage sag is meant that its duration is generally half power frequency period to the several seconds in instantaneous 10%～90% the scope that is reduced to ratings of voltage effective value when system frequency (RMS).Because 1) the voltage dip incident takes place often in the modern power systems, much larger than frequency of power cut; 2) the voltage dip coverage is big, and short-circuit voltage falls temporarily and can involve the normal operation of the outer load of tens km; 3) voltage dip makes sensitive equipment can not obtain the electric energy of required quality, and the loss that voltage dip causes is huge, thereby voltage sag is one of power quality problem the most serious in the present electric system.The generation of voltage sag, can cause program logic controller (PLC) malfunction and cause industrial processes to stop production, cause arrangements for speed regulation (ASD) malfunctioning and cause product rejection, the under voltage tripping that causes contactor and auxiliary relay tripping and can not estimate causes computer system to lose significant data etc.Recently for over ten years, because the surge of sensitive equipment, voltage sag has caused enormous economic loss to the industrial user, and data shows, the economic loss that causes in 1 voltage sag accident of countries such as America and Europe is at least more than millions of dollar.Certain knit spinning mill only 6 all wave amplitudes be 80% voltage dip, the loss that production line is caused is suitable with two hours lasting power outage.
For the voltage dip anti-interference of testing a new design system and the voltage dip sensitivity influence property to some specific electronic equipment sets, we need a voltage dip signal generating apparatus, i.e. voltage dip generating means.Just stipulated that as SEMI-F47 semiconductor manufacturing facility is to the requirement of voltage dip anti-interference.Voltage dip mainly contains 2 parameter indexs.First is the amplitude of voltage dip, promptly falls the ratio of the effective value of the effective value of voltage and normal voltage temporarily, generally represents with percentage.Second is the duration of voltage dip, and promptly voltage dip the back takes place how long continues, and is generally 0.5 cycle ~ 3 second.The voltage dip generating means must be able to satisfy above-mentioned 2 parameter indexs design and realize.Below the multiple different voltage dip generating meanss of existing various application scenarios are analyzed description.
United States Patent (USP) has been described for No. 5920132 and can have been utilized autotransformer to produce the voltage dip action on the small power electric subset, only is used for the low-voltage field.
United States Patent (USP) has been described the test board of a kind of computer control and monitoring for No. 5886429, is used to test the response that voltage dip that the electronic equipment that is connected to test board produces test board and voltage jump.
Described for patented claim WO0060430 number and be applied to glass production factory voltage dip parts susceptibility checking system.Every phase comprises two bipolar switch at least, is connected to industrial autotransformer.This system provides the amplitude of voltage dip, the selection control of duration two parameters, and every phase can produce different voltage dips.
National patent 101151546 has been described the proving installation that is used to test the action that generator under the low-voltage such as wind turbine response voltage fall temporarily, and voltage dip is similar to and may appears at wind turbine and be connected to voltage dip on the electrical network.
A kind of three-phase alternating voltage sag generating circuit that is used for the test of electromagnetic compatibility national standard voltage dip immunity to interference has been described in patented claim for No. 200910083733.5.This circuit is every to be made up of 2 two-way power switch modules, filter inductances, adopts the common emitting stage of two IGBT to be composed in series the two-way power switch module and replaces traditional rectifying bridge type switch module, has simplified design.
In addition, patented claim has proposed process and the method that test falls in aanalogvoltage temporarily for No. 200810020220.5, determines typical wiring form and experimental point according to different equipment under test types.
Above-mentioned various device and method have all adopted two-way power switch module or transformer, the control complexity of existence, cost an arm and a leg, bulky shortcoming, the main-circuit protection difficulty.
The utility model content
The utility model is analyzed improvement to the two-way power switch module, reduces the components and parts number of main circuit and control circuit, does not need transformer.Realized circuit reduction and reduce cost that improve the reliability of device, it is very little that wave filter causes pressure drop during power frequency, it is little to fall the Control of Voltage error temporarily.
In order to reach described purpose, the technical solution of the utility model: the single-phase single tube voltage dip of a kind of series resonance-type generating means, comprise the scalable monopulse generator that connects start key, the output terminal of scalable monopulse generator connects on the EDM Generator of Adjustable Duty Ratio pulse generating circuit, be connected with optocoupler PWM driving circuit on the EDM Generator of Adjustable Duty Ratio pulse generating circuit output terminal in turn, single-phase single tube AC chopper and LC series resonance mode filter.
Preferably: described scalable monopulse generator is connected to form by 555 chips, potentiometer.Such structure realizes that the turnable pulse width monopulse of half cycle-3 second produces, and falls the adjusting of duration temporarily.
Preferably: EDM Generator of Adjustable Duty Ratio pulse generating circuit and 555 chips, at least 1 resistance, at least 1 potentiometer, at least 2 diodes and at least 1 capacitor constitute multivibrator.The control end signal is provided by scalable monopulse generator output, controls the whether starting of oscillation of this multivibrator, and potentiometer is used for falling temporarily in the 10%-95% scope depth adjustment.
Preferably: adopt at least 1 high speed photo coupling in the optocoupler PWM driving circuit.High speed photo coupling is finished the isolation that PWM drove and realized light current and main circuit.
Preferably: comprise 1 full control power tube, 4 fast recovery diodes in the single-phase single tube AC chopper at least, realize single tube bidirectional electronic switch cutting control AC voltage adjusting, controlling the power tube control signal is entirely provided by the output of optocoupler PWM driving circuit.
Preferably: LC series resonance mode filter is made of resonant inductance L, the thin capacitor C series connection of film, and the LC series resonance takes place in power frequency 50Hz, the above formation of PWM carrier frequency low-pass filtering, and load is connected with LC.
Owing to adopted described technical scheme, the single-phase single tube voltage dip of a kind of series resonance-type of the utility model generating means, adopt single insulated gate bipolar power tube and auxiliary circuit to replace, thereby reduced the components and parts number of main circuit and control circuit, realize circuit reduction and reduced cost the reliability of raising device.Load is connected with LC series resonance mode filter, and LC series resonance mode filter constitutes low-pass filtering more than the PWM carrier frequency, the LC series resonance takes place in when power frequency 50Hz, and wave filter causes pressure drop very little when making power frequency, and it is little to fall the Control of Voltage error temporarily.In addition, power tube drives and adopts scalable monopulse generator, the pure hardware of EDM Generator of Adjustable Duty Ratio pulse generating circuit to realize the protection good reliability.Based on the method for the voltage dip generating means of single-phase single tube, better overcome control complexity that present same device exists, cost an arm and a leg, bulky shortcoming, have significant Technological Economy superiority.Device can produce voltage dip under manual mode, and can fall depth adjustment temporarily in the 10%-90% scope, falls the duration in half cycle-3 second scope temporarily and regulates.
Description of drawings
The theory diagram of the single-phase single tube voltage dip of a kind of series resonance-type of Fig. 1 the utility model generating means.
The circuit diagram of the single-phase single tube voltage dip of a kind of series resonance-type of Fig. 2 the utility model generating means.
The single-phase single tube AC chopper circuit diagram of the single-phase single tube voltage dip of a kind of series resonance-type of Fig. 3 the utility model generating means.
Embodiment:
As Fig. 1, Fig. 2 and shown in Figure 3, the utility model comprises that the scalable monopulse generator 1 that connects start key 6, the output terminal of scalable monopulse generator 1 connect on the EDM Generator of Adjustable Duty Ratio pulse generating circuit 2, be connected with optocoupler PWM driving circuit 3 on EDM Generator of Adjustable Duty Ratio pulse generating circuit 2 output terminals in turn, single-phase single tube AC chopper 4 and LC series resonance mode filter 5.
The single-phase single tube voltage dip of series resonance-type generating means with the maximum 30A of electric current is an example, main circuit adopts single-phase single tube AC chopper 4, comprise that 1 full control power tube, 4 fast recovery diodes constitute, realize single tube bidirectional electronic switch cutting control AC voltage adjusting, the power tube control signal is provided by 3 outputs of optocoupler PWM driving circuit.Single-phase single tube AC chopper 4 one ends are connected with normal electrical network, and single-phase single tube AC chopper 4 other ends link to each other with the output terminal of sag generating circuit by LC series resonance mode filter 5.In addition, start key 6 links to each other with the control end of scalable monopulse generator 1, the signal output part of scalable monopulse generator 1 and EDM Generator of Adjustable Duty Ratio pwm pulse generation circuit 2 control end link to each other, the signal output part of EDM Generator of Adjustable Duty Ratio pwm pulse generation circuit 2 produces the EDM Generator of Adjustable Duty Ratio pwm pulse of a time period, send single channel PWM drive signal through optocoupler PWM driving circuit 3, control the shutoff of opening of single insulated gate bipolar power tube.Load is connected with LC series resonance mode filter, and LC series resonance mode filter constitutes low-pass filtering more than the PWM carrier frequency, the LC series resonance takes place in when power frequency 50Hz, and wave filter causes pressure drop very little when making power frequency, and it is little to fall the Control of Voltage error temporarily.
In single-phase single tube voltage sag generating circuit, most important design is the design of single tube two-way exchange voltage regulating module.The single-phase single tube AC chopper 4 of the utility model comprises that 1 full control power tube, 4 fast recovery diodes constitute, and realizes single tube bidirectional electronic switch cutting control AC voltage adjusting, and the power tube control signal is provided by 3 outputs of optocoupler PWM driving circuit.Full control power tube adopts insulated gate bipolar power tube IRFP450, and 4 fast recovery diodes all adopt IDP45E60, two.Its principle of work is, during the positive half cycle of line voltage, forward current flows back to power supply ground end respectively through wave filter, load and diode D2 with control power tube entirely and diode D3; During the line voltage negative half period, inverse current is respectively through diode D1, control power tube, diode D4, load and wave filter entirely, flow back to power end, realize bidirectional current, in whole process, the electric current of controlling power MOS pipe IRFP450 entirely remains from drain D and flows to source S simultaneously. and described normal electrical network is single-phase 220V.Fall voltage temporarily and be output as 10% ~ 90% of normal line voltage.The inductance range 8mH of resonant inductance L ~ 15mH, film approaches capacitor C. and the switching frequency of power tube is 5kHz, and the duration that can fall voltage temporarily is 10ms-3s, and the temporary range of decrease value of falling voltage temporarily is 10% ~ 90%.
Overall work principle of the present utility model is: after start key 6 is pressed, with the scalable monopulse generator that links to each other--the control Enable Pin of 555 monostalbe triggers is effective, output produces single low level pulse, low level is held time and is regulated by the regulator potentiometer of this part, and low level is held time and also just equaled to fall temporarily the duration of voltage.The control Enable Pin of the coupled EDM Generator of Adjustable Duty Ratio pwm pulse of this low level pulse signal generation circuit 2 is effective, output produces the EDM Generator of Adjustable Duty Ratio pwm pulse of a time period, duty cycle adjustment is regulated by the regulator potentiometer in this partial circuit, and the temporary range of decrease value that voltage falls in dutycycle more little correspondence temporarily is just more little.The EDM Generator of Adjustable Duty Ratio pwm pulse of output sends single channel PWM drive signal through optocoupler PWM driving circuit 3, controls the shutoff of opening of single insulated gate bipolar power tube.Constitute low-pass filtering through LC series resonance mode filter more than the PWM carrier frequency again, drive away radio-frequency component, the LC series resonance takes place in when power frequency 50Hz, pressure drop is very little, thereby realizes that the load two ends produce a single-phase voltage and fall signal temporarily.After start key 6 is upspring, through one period duration, the output of scalable monopulse generator is from low level rebound high level, single low level pulse finishes, EDM Generator of Adjustable Duty Ratio pwm pulse generation circuit is no longer exported pwm pulse, and output keeps high level, controls single insulated gate bipolar power tube this moment and keeps open-minded, end falls in the single-phase voltage at load two ends temporarily, recovers normal line voltage.So just realized the function of the single-phase single tube voltage dip of series resonance-type generating means.
Claims (6)
1. the single-phase single tube voltage dip of series resonance-type generating means, comprise start key (6), it is characterized in that: the output terminal that comprises scalable monopulse generator (1), scalable monopulse generator (1) connects EDM Generator of Adjustable Duty Ratio pulse generating circuit (2), be connected with optocoupler PWM driving circuit (3) on the output terminal of EDM Generator of Adjustable Duty Ratio pulse generating circuit (2) in turn, single-phase single tube AC chopper (4) and LC series resonance mode filter (5).
2. the single-phase single tube voltage dip of a kind of series resonance-type as claimed in claim 1 generating means, it is characterized in that: described scalable monopulse generator (1) is connected to form by 555 chips, potentiometer.
3. the single-phase single tube voltage dip of a kind of series resonance-type as claimed in claim 2 generating means is characterized in that: EDM Generator of Adjustable Duty Ratio pulse generating circuit (2) and 555 chips, at least 1 resistance, at least 1 potentiometer, at least 2 diodes and at least 1 capacitor constitute multivibrator.
4. the single-phase single tube voltage dip of a kind of series resonance-type as claimed in claim 1 generating means is characterized in that: adopt at least 1 high speed photo coupling in the optocoupler PWM driving circuit (3).
5. the single-phase single tube voltage dip of a kind of series resonance-type as claimed in claim 1 generating means is characterized in that: comprise 1 full control power tube, 4 fast recovery diodes in the single-phase single tube AC chopper (4) at least.
6. the single-phase single tube voltage dip of a kind of series resonance-type as claimed in claim 1 generating means is characterized in that: LC series resonance mode filter (5) is made of resonant inductance L, the thin capacitor C series connection of film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202155938U CN201637768U (en) | 2009-12-31 | 2009-12-31 | Single-phase single-tube voltage sag generating device of series resonance type |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009202155938U CN201637768U (en) | 2009-12-31 | 2009-12-31 | Single-phase single-tube voltage sag generating device of series resonance type |
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| CN201637768U true CN201637768U (en) | 2010-11-17 |
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| CN2009202155938U Expired - Fee Related CN201637768U (en) | 2009-12-31 | 2009-12-31 | Single-phase single-tube voltage sag generating device of series resonance type |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103412260A (en) * | 2013-06-28 | 2013-11-27 | 株洲变流技术国家工程研究中心有限公司 | Voltage sag generator |
| CN104360235A (en) * | 2014-11-19 | 2015-02-18 | 南京工程学院 | Method for positioning voltage sag source of complex power distribution network including DGs |
| CN105652134A (en) * | 2016-03-24 | 2016-06-08 | 安徽理工大学 | Novel voltage leap generator |
-
2009
- 2009-12-31 CN CN2009202155938U patent/CN201637768U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103412260A (en) * | 2013-06-28 | 2013-11-27 | 株洲变流技术国家工程研究中心有限公司 | Voltage sag generator |
| CN103412260B (en) * | 2013-06-28 | 2016-04-06 | 株洲变流技术国家工程研究中心有限公司 | Voltage sag generator |
| CN104360235A (en) * | 2014-11-19 | 2015-02-18 | 南京工程学院 | Method for positioning voltage sag source of complex power distribution network including DGs |
| CN104360235B (en) * | 2014-11-19 | 2017-04-19 | 南京工程学院 | Method for positioning voltage sag source of complex power distribution network including DGs |
| CN105652134A (en) * | 2016-03-24 | 2016-06-08 | 安徽理工大学 | Novel voltage leap generator |
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Legal Events
| Date | Code | Title | Description |
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| 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: 20101117 Termination date: 20111231 |