CN201555863U - Three-phase energy-regenerating alternating current and direct current universal electronic load simulator - Google Patents
Three-phase energy-regenerating alternating current and direct current universal electronic load simulator Download PDFInfo
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- CN201555863U CN201555863U CN 200920318516 CN200920318516U CN201555863U CN 201555863 U CN201555863 U CN 201555863U CN 200920318516 CN200920318516 CN 200920318516 CN 200920318516 U CN200920318516 U CN 200920318516U CN 201555863 U CN201555863 U CN 201555863U
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Abstract
The utility model discloses a three-phase energy-regenerating alternating current and direct current universal electronic load simulator, which comprises a to-be-tested power supply, a rectification link, a direct current link, a contravariant link, an isolation link and a power grid. An energy-regenerating electronic loading device is formed by the rectification link, the direct current link and the contravariant link. The three-phase energy-regenerating alternating current and direct current universal electronic load simulator can not only simulate alternating current and direct current universal load, but also simulate single three-phase universal load, and simulate three-phase symmetry load, three-phase dissymmetry load, three-phase three-wire load and three-phase four-wire load. A user can choose an optimum circuit structure according to working requirements to simulate corresponding electronic load. Besides, the three-phase energy-regenerating alternating current and direct current universal electronic load simulator has extremely strong practicality and flexibility.
Description
Technical field
The utility model belongs to the load simulation technical field, relates to a kind of electronic load simulator, is specifically related to the energy AC/DC electronic load simulator of a kind of three-phase.
Background technology
Along with the development of Power Electronic Technique, various power electronic equipments arise at the historic moment, and have obtained using widely; As direct supplys such as active power filter, Static Var Compensator, uninterrupted power source, alternating current steady voltage plug, communication power supplies.These products all will carry out the various characteristics test when dispatching from the factory, as fail-test, output characteristics test etc., to test its various technical indicators and performance.Traditional method of testing is to adopt the method for physical load such as resistance box, rheochord, inductance and electric capacity to carry out.The problem that mainly has three aspects when using these loads: at first be the physical load that needs are prepared a large amount of all sizes, make to lack dirigibility and invest bigger; Next is to simulate the load that has special characteristics as Constant Current Load, nonlinear load etc.; The 3rd is that the energy of these experimental facilitiess of input is all consumed, and causes very big energy dissipation.Based on energy savings and the experiment automatized requirement of raising, need a kind of novel test load device.
Electronic load is a kind of electronic installation that utilizes Power Electronic Technique, Computer Control Technology and automatic technology to realize.It can make things convenient for the simulation various needs its load form, have dirigibility; And the energy feedback grid that electronic load can also be absorbed, saves energy; Has practicality.Energy regenerative type electronic load generally adopts the two pwm converter structures of AC-DC-AC, has characteristics such as dynamic perfromance is good, current harmonics is little, power factor is high, energy two-way flow.Energy regenerative type electronic load is being subjected to the attention of domestic and international colleges and universities, scientific research institutions and power supply manufacturing enterprise.
The energy electronic load main circuit of research is primarily aimed at single-phase electronic load at present, and along with the continuous expansion of power supply type, need the type of fictitious load also more and more, comprise linear load, nonlinear load, single-phase load, threephase load (phase three-wire three, three-phase four-wire system load), DC load, AC load etc.; Particularly need to consider to comprise in the threephase load situation of symmetrical components, asymmetrical component, positive-sequence component, negative sequence component and zero-sequence component.
Summary of the invention
The purpose of this utility model provides the energy AC/DC electronic load simulator of a kind of three-phase, this device can be simulated the general electronic load of single three-phase, it is simple to have solved existing single-phase electronic load device analog type, can not simulate the problem of threephase load (phase three-wire three, three-phase four-wire system load).
The technical scheme that the utility model adopted is, the energy AC/DC electronic load simulator of a kind of three-phase, comprise the tested power supply that connects successively, the rectification link, DC link, the inversion link, isolation link and electrical network, the half-bridge that the rectification link is made up of switching tube a and switching tube b, the half-bridge that switching tube c and switching tube d form, the half-bridge that switching tube e and switching tube f form, the half-bridge that switching tube g and switching tube h form, the half-bridge that half-bridge that switching tube i and switching tube j form and switching tube k and switching tube l form is formed in parallel, the mid point of the half-bridge that the mid point of the half-bridge that switching tube a and switching tube b form and switching tube c and switching tube d form is by inductance d, inductance e connects to form the pwm converter of a single-phase full bridge, the mid point of the half-bridge that the mid point of the half-bridge that switching tube e and switching tube f form and switching tube g and switching tube h form is by inductance f, inductance g connects to form the pwm converter of a single-phase full bridge, and the mid point of the half-bridge that the mid point of the half-bridge that switching tube i and switching tube j form and switching tube k and switching tube l form is by inductance h, inductance i connects to form the pwm converter of a single-phase full bridge; The half-bridge that half-bridge that the half-bridge that the inversion link is made up of switching tube m and switching tube n, switching tube o and switching tube p form and switching tube q and switching tube r form is formed in parallel, and the mid point of three half-bridges connects to form the three-phase PWM transducer by inductance a, inductance b and inductance c successively.
Characteristics of the present utility model are,
Rectification link wherein adopts the device of three full bridge PWM transducer common DC busbar voltages;
DC link wherein adopts dc energy storage electric capacity;
Isolation link wherein adopts the three-phase main-frequency isolating transformer.
The beneficial effects of the utility model are,
(1) repeated configuration of minimizing energy feedback unit is simple and reasonable, economic and reliable.
(2) common DC bus middle dc voltage is constant, and energy can two-way flow, can make full use of energy; Each pwm converter is operated under the different states, and the dynamic perfromance of system has been optimized in energy feedback complementation.
(3) each phase electronic load can be separated from dc bus separately and not influence other system; Do not have coupling between each phase command signal of load, control strategy is simple, fictitious load precision height.
(4) have wide range of applications, be applicable to multiple load module, and large-power occasions.
Description of drawings
Fig. 1 is the structural representation of the energy AC/DC electronic load simulator of the utility model three-phase;
Fig. 2 is the wiring schematic diagram when simulating the energy electronic load of three-phase with the utility model device, wherein a is the single-phase electronic load synoptic diagram of simulation, b is the single-phase electronic load synoptic diagram of multipleization of simulation, c is the complete independent electronic load of simulation three-phase synoptic diagram, d is simulation three-phase three-wire system electronic load synoptic diagram, and e is simulation three-phase four-wire system electronic load synoptic diagram.
Among the figure, 1. tested power supply, 2. rectification link, 3. DC link, 4. inversion link, 5. isolation link, 6. electrical network, 7. energy electronic load device, 8. switching tube a, 9. switching tube b, 10. switching tube c, 11. switching tube d, 12. switching tube e, 13. switching tube f, 14. switching tube g, 15. switching tube h, 16. switching tube i, 17. switching tube j, 18. switching tube k, 19. switching tube l, 20. dc energy storage electric capacity, 21. switching tube m, 22. switching tube n, 23. switching tube o, 24. switching tube p, 25. switching tube q, 26. switching tube r, 27. inductance a, 28. inductance b, 29. inductance c, 30. inductance d, 31. inductance e, 32. inductance f, 33. inductance g, 34. inductance h, 35. inductance i.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is elaborated.
The energy AC/DC electronic load simulator of the utility model three-phase as shown in Figure 1, comprises the tested power supply 1, rectification link 2, DC link 3, inversion link 4, isolation link 5 and the electrical network 6 that connect successively.Wherein, rectification link 2, DC link 3 and the energy electronic load device 7 of inversion link 4 common compositions.Tested power supply 1 can be single phase poaer supply or three-phase supply (phase three-wire three, three-phase and four-line); The half-bridge that half-bridge that the half-bridge that the half-bridge that the half-bridge that the half-bridge that rectification link 2 is made up of switching tube a8 and switching tube b9, switching tube c10 and switching tube d11 form, switching tube e12 and switching tube f13 form, switching tube g14 and switching tube h15 form, switching tube i16 and switching tube j17 form and switching tube k18 and switching tube l19 form is formed in parallel, and the tie point of six half-bridges and tested power supply 1 is respectively tie point a, tie point x, tie point b, tie point y, tie point c, tie point z.The mid point of the half-bridge that the mid point of the half-bridge that switching tube a8 and switching tube b9 form and switching tube c10 and switching tube d11 form is by inductance d30, inductance e31 connects to form the pwm converter of a single-phase full bridge, the mid point of the half-bridge that the mid point of the half-bridge that switching tube e12 and switching tube f13 form and switching tube g14 and switching tube h15 form is by inductance f32, inductance g33 connects to form the pwm converter of a single-phase full bridge, and the mid point of the half-bridge that the mid point of the half-bridge that switching tube i16 and switching tube j17 form and switching tube k18 and switching tube l19 form is by inductance h34, inductance i35 connects to form the pwm converter of a single-phase full bridge; DC link 3 comprises dc energy storage electric capacity 20; The half-bridge that half-bridge that the half-bridge that inversion link 4 is made up of switching tube m21 and switching tube n22, switching tube o23 and switching tube p24 form and switching tube q25 and switching tube r26 form is formed in parallel, and the mid point of three half-bridges connects to form the three-phase PWM transducer by inductance a27, inductance b28 and inductance c29 successively; Isolation link 5 comprises a three-phase main-frequency isolating transformer.
The course of work of the present utility model is: with the voltage of tested power supply 1 by rectification link 2, with ac voltage rectifier is DC voltage, store energy is on dc energy storage electric capacity 20, again with DC voltage by inversion link 4, with the DC voltage rectification is alternating voltage, by isolation link 5, energy feeds back to electrical network 6 the most at last.
For rectification link 2, its controlled target is exactly accurately to control actual current, and its load form that makes actual current present tested supply voltage is a setting value.To any (comprising non-linear) its load form, can determine the mathematical model f of its voltage and current according to required its load form
z(u
S1 *, i
S1 *)=0.When measurand was voltage source, tested voltage can record in real time, can solve electric current in real time according to following formula, as long as control PWM rectifier makes its input current trace command electric current, just can simulate both fixed loads.
Adopt the energy AC/DC electronic load simulator of the utility model three-phase, rectification link 2 is the structure of three single-phase full bridge common DC buses, can simulate multiple loadtype, Fig. 2 is several working state schematic representations of the utility model circuit structure fictitious load.
(1) the single-phase electronic load of simulation is shown in Fig. 2 a, 2b: use wherein any one group of full bridge PWM transducer, for example tie point a, tie point x are connected with interchange or the tested power supply of direct current that (Fig. 2 a), tie point b, tie point y are connected with interchange or the tested power supply of direct current, and tie point c, tie point z are connected with interchange or the tested power supply of direct current.Fig. 2 b is depicted as tie point a, tie point b, tie point c connects the network that connects to form two ports with tie point x, tie point y, tie point z, is connected with interchange or the tested power supply of direct current, realizes the purpose of the single-phase electronic load of simulation.Circuit structure shown in Fig. 2 b is to use three half-bridge parallel connections, and the capacity when single-phase is much bigger.
(2) simulation three-phase fully independently electronic load shown in Fig. 2 c, use three groups of single-phase full bridge pwm converters, with tie point a, tie point x, tie point b, tie point y, tie point c, tie point z are connected with the fully independently tested power supply of three-phase respectively, simulate corresponding three-phase electronic load, but the tested power supply of this three-phase does not allow to exist common mode voltage.
(3) electronic load of simulation three-phase three-wire system is shown in Fig. 2 d, use three groups of single-phase full bridge pwm converters, with tie point a, tie point z, tie point x, tie point b, tie point y, tie point c connect to form leg-of-mutton connected mode respectively, link to each other with tested phase three-wire three power supply, realize the purpose of simulation three-phase three-wire system electronic load, and the energy feedback grid.
(4) electronic load of simulation three-phase four-wire system is shown in Fig. 2 e, tie point x, tie point y, tie point z are connected to form the Y-connection mode that center line n and tie point a, tie point b, tie point c form three-phase four-wire system, be connected with tested three-phase four-wire system power supply, realize the purpose of simulation three-phase four-wire system electronic load.Three-phase electronic loads such as that this circuit structure can be simulated is three symmetrical, asymmetric, positive sequence, negative phase-sequence, zero sequence.
The energy AC/DC electronic load simulator of the utility model three-phase, not only can simulate the AC/DC universal load, also can simulate the general load of single three-phase, for threephase load can simulate three symmetrical, three-phase is asymmetric, phase three-wire three, three-phase four-wire system load.The user can choose optimum circuit structure according to work requirements, simulates corresponding electronic load, and practicality and dirigibility are very strong.
Claims (4)
1. energy AC/DC electronic load simulator of three-phase, it is characterized in that, comprise the tested power supply (1) that connects successively, rectification link (2), DC link (3), inversion link (4), isolation link (5) and electrical network (6), the half-bridge that described rectification link (2) is made up of switching tube a (8) and switching tube b (9), the half-bridge that switching tube c (10) and switching tube d (11) form, the half-bridge that switching tube e (12) and switching tube f (13) form, the half-bridge that switching tube g (14) and switching tube h (15) form, the half-bridge that half-bridge that switching tube i (16) and switching tube j (17) form and switching tube k (18) and switching tube l (19) form is formed in parallel, the mid point of the half-bridge that the mid point of the half-bridge that switching tube a (8) and switching tube b (9) form and switching tube c (10) and switching tube d (11) form is by inductance d (30), inductance e (31) connects to form the pwm converter of a single-phase full bridge, the mid point of the half-bridge that the mid point of the half-bridge that switching tube e (12) and switching tube f (13) form and switching tube g (14) and switching tube h (15) form is by inductance f (32), inductance g (33) connects to form the pwm converter of a single-phase full bridge, and the mid point of the half-bridge that the mid point of the half-bridge that switching tube i (16) and switching tube j (17) form and switching tube k (18) and switching tube l (19) form is by inductance h (34), inductance i (35) connects to form the pwm converter of a single-phase full bridge; The half-bridge that half-bridge that the half-bridge that described inversion link (4) is made up of switching tube m (21) and switching tube n (22), switching tube o (23) and switching tube p (24) form and switching tube q (25) and switching tube r (26) form is formed in parallel, and the mid point of three half-bridges connects to form the three-phase PWM transducer by inductance a (27), inductance b (28) and inductance c (29) successively.
2. the energy AC/DC electronic load simulator of three-phase according to claim 1 is characterized in that, described rectification link (2) adopts the device of three full bridge PWM transducer common DC busbar voltages.
3. the energy AC/DC electronic load simulator of three-phase according to claim 1 is characterized in that, described DC link (3) adopts dc energy storage electric capacity (20).
4. the energy AC/DC electronic load simulator of three-phase according to claim 1 is characterized in that, described isolation link (5) adopts the three-phase main-frequency isolating transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920318516 CN201555863U (en) | 2009-12-25 | 2009-12-25 | Three-phase energy-regenerating alternating current and direct current universal electronic load simulator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920318516 CN201555863U (en) | 2009-12-25 | 2009-12-25 | Three-phase energy-regenerating alternating current and direct current universal electronic load simulator |
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| CN201555863U true CN201555863U (en) | 2010-08-18 |
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| CN 200920318516 Expired - Fee Related CN201555863U (en) | 2009-12-25 | 2009-12-25 | Three-phase energy-regenerating alternating current and direct current universal electronic load simulator |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102651632A (en) * | 2012-05-09 | 2012-08-29 | 浙江大学 | Six-half-bridge space vector pulse width modulation (SVPWM) control method for high-voltage high-power three-phase asynchronous motor |
| CN103323789A (en) * | 2013-05-23 | 2013-09-25 | 深圳睿立方智能科技有限公司 | Electric fetching and monitoring circuit of auxiliary power supply in data center machine room power supply test |
| CN104897979A (en) * | 2014-03-05 | 2015-09-09 | 洛克威尔自动控制技术股份有限公司 | Systems and methods for testing motor drives |
| CN106230079A (en) * | 2016-08-10 | 2016-12-14 | 江苏林洋能源股份有限公司 | Split-phase type low-power consumption energy accumulation current converter and control method thereof and control system |
| CN109765502A (en) * | 2019-03-13 | 2019-05-17 | 哈尔滨工业大学 | A kind of program-controlled DC Electronic Loads |
| CN110198051A (en) * | 2019-07-02 | 2019-09-03 | 中国商用飞机有限责任公司北京民用飞机技术研究中心 | A kind of aircraft electrical power system high voltage direct current nonlinear load simulator |
| CN111487485A (en) * | 2019-12-31 | 2020-08-04 | 杭州银湖电气设备有限公司 | Three-phase unbalanced load simulation test device and method thereof |
| CN111880017A (en) * | 2020-07-02 | 2020-11-03 | 国网天津市电力公司 | Three-phase unbalance management test system and test method for power distribution area |
| CN112865554A (en) * | 2021-01-19 | 2021-05-28 | 江苏金智科技股份有限公司 | Single-phase or three-phase alternating current power supply multiplexing type power electronic load device |
| CN113514679A (en) * | 2021-04-16 | 2021-10-19 | 广东电网有限责任公司 | Universal modularized energy feedback type AC/DC virtual load |
| CN115078790A (en) * | 2022-08-22 | 2022-09-20 | 艾乐德电子（南京）有限公司 | Alternating current electronic load device and triangular load implementation method thereof |
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2009
- 2009-12-25 CN CN 200920318516 patent/CN201555863U/en not_active Expired - Fee Related
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102651632B (en) * | 2012-05-09 | 2014-06-04 | 浙江大学 | Six-half-bridge space vector pulse width modulation (SVPWM) control method for high-voltage high-power three-phase asynchronous motor |
| CN102651632A (en) * | 2012-05-09 | 2012-08-29 | 浙江大学 | Six-half-bridge space vector pulse width modulation (SVPWM) control method for high-voltage high-power three-phase asynchronous motor |
| CN103323789A (en) * | 2013-05-23 | 2013-09-25 | 深圳睿立方智能科技有限公司 | Electric fetching and monitoring circuit of auxiliary power supply in data center machine room power supply test |
| CN103323789B (en) * | 2013-05-23 | 2015-07-29 | 深圳睿立方智能科技有限公司 | The power taking of accessory power supply and supervisory circuit in a kind of data center machine room power supply test |
| CN104897979A (en) * | 2014-03-05 | 2015-09-09 | 洛克威尔自动控制技术股份有限公司 | Systems and methods for testing motor drives |
| CN104897979B (en) * | 2014-03-05 | 2017-12-12 | 罗克韦尔自动化技术公司 | System and method for test motor driving |
| CN106230079A (en) * | 2016-08-10 | 2016-12-14 | 江苏林洋能源股份有限公司 | Split-phase type low-power consumption energy accumulation current converter and control method thereof and control system |
| CN109765502B (en) * | 2019-03-13 | 2020-12-01 | 哈尔滨工业大学 | Program-controlled direct current electronic load |
| CN109765502A (en) * | 2019-03-13 | 2019-05-17 | 哈尔滨工业大学 | A kind of program-controlled DC Electronic Loads |
| CN110198051A (en) * | 2019-07-02 | 2019-09-03 | 中国商用飞机有限责任公司北京民用飞机技术研究中心 | A kind of aircraft electrical power system high voltage direct current nonlinear load simulator |
| CN111487485A (en) * | 2019-12-31 | 2020-08-04 | 杭州银湖电气设备有限公司 | Three-phase unbalanced load simulation test device and method thereof |
| CN111487485B (en) * | 2019-12-31 | 2022-06-17 | 杭州银湖电气设备有限公司 | Three-phase unbalanced load simulation test device and method thereof |
| CN111880017A (en) * | 2020-07-02 | 2020-11-03 | 国网天津市电力公司 | Three-phase unbalance management test system and test method for power distribution area |
| CN112865554A (en) * | 2021-01-19 | 2021-05-28 | 江苏金智科技股份有限公司 | Single-phase or three-phase alternating current power supply multiplexing type power electronic load device |
| CN113514679A (en) * | 2021-04-16 | 2021-10-19 | 广东电网有限责任公司 | Universal modularized energy feedback type AC/DC virtual load |
| CN115078790A (en) * | 2022-08-22 | 2022-09-20 | 艾乐德电子（南京）有限公司 | Alternating current electronic load device and triangular load implementation method thereof |
| CN115078790B (en) * | 2022-08-22 | 2022-11-04 | 艾乐德电子（南京）有限公司 | Alternating current electronic load device and triangular load implementation method thereof |
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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: 20100818 Termination date: 20101225 |