CN101692112A - High-power electric energy quality signal generator for testing 400Hz electric equipment - Google Patents
High-power electric energy quality signal generator for testing 400Hz electric equipment Download PDFInfo
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- CN101692112A CN101692112A CN200910035179A CN200910035179A CN101692112A CN 101692112 A CN101692112 A CN 101692112A CN 200910035179 A CN200910035179 A CN 200910035179A CN 200910035179 A CN200910035179 A CN 200910035179A CN 101692112 A CN101692112 A CN 101692112A
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Abstract
The invention provides a high-power electric energy quality signal generator for testing 400Hz electric equipment, relating to a device which can test electric energy quality sensitive equipment in an electric power system taking 400Hz as a fundamental wave in the fields such as aviation, navigation and the like. The generator is characterized by adopting an A.D.A total topological structure and realizing three-phase output which is mutually independent. A rectifying part is composed of a three-phase bridge voltage PWM rectifier and a phi-shaped filter, an inverting part is in a cascade structure, direct current output adopts the shared direct current bus structure, each phase has N inverting units which are in an H-bridge structure and provided with high frequency transformers at the back part, output isolation of each inverting unit is coupled together, and final output is obtained by an output filter. The whole device uses mature power elements and can output the electric energy quality signals such as harmonic waves, dropping, upsurge, flicker and the like. The output waveform frequency ranges from 1 to 6000Hz, and at least 15 harmonics of the 400Hz fundamental wave can be produced.
Description
Technical field
The present invention relates to a kind of 400Hz consumer test with high-power electric energy quality signal generating means, belong to the technical field that power electronics is used in electric system.Relate to a kind of can be to as being the device that quality of power supply sensitive equipment is tested in the electric system of first-harmonic with 400 hertz in the fields such as aviation and navigation.
Background technology
Electrical equipment all has certain requirement to the quality of power supply, and power quality problem can cause electrical equipment to break down even damage, thereby influence production causes the loss of each side.Can produce harmonic wave, electric voltage dropping, rise sharply, the generating means of quality of power supply signal such as flickering, depression, can provide several abnormal voltage signals that often occur in the power supply network for man of Electronic Equipment Factory and laboratory study, carry out the research of consumer with this to quality of power supply susceptibility, the antijamming capability that improves equipment, improve the quality of power supply susceptibility of consumer, the reliability of reinforcement equipment and security, the loss that reduces power quality problem in a large number and brought.
At present, DUAL PWM CONVERTER AND has been carried out a lot of research, but needed further to improve the capacity of device, enlarged the frequency range of output waveform, to adapt to the demand of wider scope.Be applied to the power equipment in aviation and navigation field, frequency of operation is 400Hz, 15 subfrequencies of its correspondence have reached 6000Hz, under high-power condition, produce the output waveform of high frequency like this, traditional pulse modulation technology will be difficult to be suitable for, and need improve aspect structure of installing and the control technology.Have under high-power condition the technology and equipment that produces the high-frequency electrical energy quality signal abroad, and carry out blockade on new techniques to domestic, therefore, development high-frequency high-power DUAL PWM CONVERTER AND enlarges the territory of its application, has very significant meaning.
Summary of the invention
Technical matters: the objective of the invention is to propose a kind of 400Hz consumer and test with high-power electric energy quality signal generating means, can output harmonic wave, quality of power supply signal such as electric voltage dropping, voltage swells, flickering, the output waveform frequency range is between 1-6000Hz, at least can produce 15 subharmonic of first-harmonic 400Hz, in order to as in the fields such as aviation and navigation with 400 hertz be in the electric system of first-harmonic quality of power supply sensitive equipment test or with the common test macro of forming of other devices.
Technical scheme: 400Hz consumer test with high-power electric energy quality signal generating means relate to a kind of can be to as being the device that quality of power supply sensitive equipment is tested in the electric system of first-harmonic with 400 hertz in the fields such as aviation and navigation.This device adopts the three-phase supply input, three-phase output, and device adopts total topological structure of AC-DC-interchange, is divided into rectifying part and inversion part;
Rectifying part comprises Three-phase PWM Voltage Rectifier and π type direct current output filter, and the three-phase alternating current input becomes direct current behind the Three-phase PWM Voltage Rectifier rectifier, again through π type direct current output filter, obtains the direct current input of inversion part;
Cascaded inverter is partly adopted in inversion, three-phase output is separate, whenever, constitute by N inversion unit cascade, the common DC bus structure is adopted in the direct current input of each inversion unit, shared same direct current input, install high-frequency transformer behind each inversion unit additional with the output isolation coupling of each inversion unit together, cascade output obtains final needed waveform by output filter.
Described Three-phase PWM Voltage Rectifier is the three-phase bridge structure, is made up of six power tubes and six inverse parallel diodes, and π type direct current output filter is made up of electric capacity and inductance.
Described inversion unit is four power tubes and four bridge architectures that the inverse parallel diode is formed.
Beneficial effect: the 400Hz consumer based on Power Electronic Technique of the present invention is tested with high-power electric energy quality signal generating means, adopted suitable circuit topological structure, overcome the contradiction that improves power in the conventional P WM technology and improve the power tube switching frequency, under powerful condition, realized the output of high frequency waveforms, well satisfied in field electrical equipment experiment such as aviation and navigation and the test demand high-frequency signal.
Description of drawings
Fig. 1: the 400Hz consumer is tested the circuit structure block diagram with high-power electric energy quality signal generating means;
Fig. 2: the 400Hz consumer is tested the topology diagram with high-power electric energy quality signal generating means;
Fig. 3: first-harmonic 400Hz, the waveform of 18%5 subharmonic that superpose;
Fig. 4: first-harmonic 400Hz, the waveform of 15%13 subharmonic that superpose;
Fig. 5: electric voltage dropping 20% waveform;
Fig. 6: voltage swells 20% waveform;
Fig. 7: amplitude changes 15% flickering waveform.
Embodiment
Adopt total topological structure of handing over orthogonal, can be divided into rectifying part and inversion part.The input of employing three-phase supply, rectifying part is made up of three-phase bridge voltage type PWM rectifier and π type direct current output filter, the common DC bus structure is adopted in the input of inversion part direct current, can export by three-phase, and three-phase is separate, whenever, constitute by N inversion unit cascade, can improve the capacity of system greatly by cascade, improve the equivalent switching frequency of power tube, overcome the contradiction that improves power in the conventional P WM technology and improve the power tube switching frequency, inversion unit adopts the H bridge construction, by the high-frequency transformer that installs additional behind each inversion unit with the output isolation coupling of each inversion unit together.Cascade output can obtain final needed waveform by output filter.Whole device all adopts mature power devices, can output harmonic wave, quality of power supply signal such as electric voltage dropping, voltage swells, flickering, and wherein harmonic wave can produce 15 subharmonic of first-harmonic 400Hz at least.
Three-phase PWM Voltage Rectifier is formed a bridge-type unit by six power tubes (MOSFET, IGBT etc.) and six inverse parallel diodes, and by suitable control strategy, has unity power factor, thereby reduce the pollution to electrical network.Then by the direct-current input power supplying of direct current output filter as inversion unit.The direct current output filter adopts pi type filter can well suppress the fluctuation of DC voltage.
Inversion unit is made up of four power tubes (MOSFET, IGBT etc.) and four inverse parallel diodes, and the inversion output is every to be made of N inversion unit cascade, and N can determine according to concrete technical specification such as capacity, the output waveform frequency etc. of device.The output of each inversion unit is coupled by high-frequency transformer, realizes the purpose of cascade.The volume that high-frequency transformer helps improving the conversion efficiency of device and reduces device.Output filter can improve the output waveform quality of inversion unit, quality of power supply signal has the characteristics of himself, its scope is not limited to the simple sinusoidal ripple, also comprise many nonsinusoidal signals, some quality of power supply signal such as voltage sag, spike etc., signal can be undergone mutation, and wherein comprises a lot of irregular signals, these signals contain a lot of harmonic componentss, require wave filter that enough frequency domains are arranged.
This device is based on the high-frequency high-power DUAL PWM CONVERTER AND of Power Electronic Technique, and total topological structure of circuit is for handing over the orthogonal structure, and such structure control is flexible, is fit to bigger power and passes through.Adopt three-phase supply as the input power supply, through three-phase PWM rectification circuit (2), interchange is become direct current, through direct current output filter (3), suppress dc voltage fluctuation again with this, the DC voltage of output is as the common DC power supply of all inversion units, can save cost greatly like this, cascade structure is partly adopted in inversion, can improve the capacity of device, by suitable control strategy, can improve equivalent output frequency.By inversion part (4), change direct current into interchange, each inversion unit back installs high-frequency transformer (5) additional, the output of each inversion unit is coupled, because adopt the common DC bus structure, transformer plays buffer action, and can carry out the adjusting of voltage by transformer.Cascade output can obtain final output waveform by output filter (6).Owing to adopt the three-phase independent design, whole device both can use as three-phase, also can be used as single-phase use.
As shown in Figure 2, rectifying part adopts Three-phase PWM Voltage Rectifier (2), by six power tubes (MOSFET, IGBT etc.) and six three-phase bridge circuits that the inverse parallel diode is formed, selects suitable control strategy can realize unity power factor.The direct current output filter adopts pi type filter, and for guaranteeing the security of circuit working, so all install inductance additional in the both sides in loop, filter capacitor adopts the mode of two capacitances in series, can reduce the requirement of withstand voltage of each electric capacity, is easier to realize.The mid point of selecting two electric capacity can reduce the requirement of withstand voltage of whole device as earth point, is beneficial to safe operation and saves cost.
As shown in Figure 2, the inversion part can be exported by three-phase, every phase cascaded inverter is formed by N inversion unit cascade, inversion unit 6 is four power tubes (MOSFET, IGBT etc.) and four bridge architectures that the inverse parallel diode is formed, N can be required to determine by the capacity that installs, output waveform frequency etc., device adopts the Cascade H bridge construction, and main purpose is under lower devices switch frequency, obtains the output of higher equivalent switching frequency and the capacity of raising device.Connect high-frequency transformer behind each inversion unit, the output of each inverter is coupled together.Cascade inversion output will be passed through output filter, to obtain high-quality output waveform, for guaranteeing the security of circuit, all installs inductance additional in the both sides, loop.Y-connection is adopted in three-phase output.
Waveform with required generation is as modulating wave, by cascaded inverter is adopted suitable modulation system and control strategy, produce needed waveform, though required generation is powerful high-frequency signal, but after the mode by cascade, the switching frequency of each inversion unit power tube still can keep normal level, but the equivalent switching frequency of output can significantly improve at last, thereby can realize the output of high-frequency signal.Quality of power supply signals such as device can output harmonic wave, electric voltage dropping, voltage swells, flickering, the output waveform frequency range can produce 15 subharmonic of first-harmonic 400Hz at least between 1-6000Hz.
Claims (3)
1. a 400Hz consumer test is characterized in that with high-power electric energy quality signal generating means this device adopts three-phase supply input (1), three-phase output, and device adopts total topological structure of AC-DC-interchange, is divided into rectifying part and inversion part;
Rectifying part comprises Three-phase PWM Voltage Rectifier (2) and π type direct current output filter (3), the three-phase alternating current input becomes direct current behind Three-phase PWM Voltage Rectifier (2) rectifier, through π type direct current output filter (3), obtain the direct current input of inversion part again;
Cascaded inverter (4) is partly adopted in inversion, three-phase output is separate, whenever, constitute by N inversion unit (7) cascade, the common DC bus structure is adopted in the direct current input of each inversion unit, shared same direct current input, install high-frequency transformer (5) behind each inversion unit (7) additional with the output isolation coupling of each inversion unit together, cascade output obtains final needed waveform by output filter (6).
2. 400Hz consumer according to claim 1 is tested with high-power electric energy quality signal generating means, it is characterized in that described Three-phase PWM Voltage Rectifier (2) is the three-phase bridge structure, be made up of six power tubes and six inverse parallel diodes, π type direct current output filter (3) is made up of electric capacity and inductance.
3. 400Hz consumer test according to claim 1 is characterized in that with high-power electric energy quality signal generating means described inversion unit (7) is four power tubes and four bridge architectures that the inverse parallel diode is formed.
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| CN200910035179A CN101692112A (en) | 2009-09-07 | 2009-09-07 | High-power electric energy quality signal generator for testing 400Hz electric equipment |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102148501A (en) * | 2010-07-23 | 2011-08-10 | 中国电力科学研究院 | Disturbance generation device for wind power station |
| CN102185337A (en) * | 2011-05-06 | 2011-09-14 | 深圳市禾望电气有限公司 | Grid stimulating device |
| CN102281007A (en) * | 2011-08-30 | 2011-12-14 | 刘闯 | Multi-transformer switch power supply with cascaded output |
| CN102692577A (en) * | 2012-06-25 | 2012-09-26 | 镇江天力变压器有限公司 | Test system for large-power high-frequency transformer |
| CN102998549A (en) * | 2012-07-10 | 2013-03-27 | 辽宁荣信电气传动技术有限责任公司 | H-bridge based single-phase low voltage ride-through test bed |
| CN105099214A (en) * | 2014-05-05 | 2015-11-25 | 乐金电子研发中心(上海)有限公司 | Single-stage step-up inverter |
| CN106546946A (en) * | 2016-12-08 | 2017-03-29 | 国网江西省电力公司电力科学研究院 | A kind of non-linear operating condition emulation platform of electric energy meter |
-
2009
- 2009-09-07 CN CN200910035179A patent/CN101692112A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102148501A (en) * | 2010-07-23 | 2011-08-10 | 中国电力科学研究院 | Disturbance generation device for wind power station |
| CN102148501B (en) * | 2010-07-23 | 2014-09-10 | 中国电力科学研究院 | Disturbance generation device for wind power station |
| CN102185337A (en) * | 2011-05-06 | 2011-09-14 | 深圳市禾望电气有限公司 | Grid stimulating device |
| CN102185337B (en) * | 2011-05-06 | 2013-03-20 | 深圳市禾望电气有限公司 | Grid stimulating device |
| CN102281007A (en) * | 2011-08-30 | 2011-12-14 | 刘闯 | Multi-transformer switch power supply with cascaded output |
| CN102281007B (en) * | 2011-08-30 | 2014-01-08 | 刘闯 | Multi-transformer switch power supply with cascaded output |
| CN102692577A (en) * | 2012-06-25 | 2012-09-26 | 镇江天力变压器有限公司 | Test system for large-power high-frequency transformer |
| CN102998549A (en) * | 2012-07-10 | 2013-03-27 | 辽宁荣信电气传动技术有限责任公司 | H-bridge based single-phase low voltage ride-through test bed |
| CN105099214A (en) * | 2014-05-05 | 2015-11-25 | 乐金电子研发中心(上海)有限公司 | Single-stage step-up inverter |
| CN106546946A (en) * | 2016-12-08 | 2017-03-29 | 国网江西省电力公司电力科学研究院 | A kind of non-linear operating condition emulation platform of electric energy meter |
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