CN204758716U - Dc -to -ac converter is at ring testing arrangement - Google Patents
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Abstract
The utility model provides a dc -to -ac converter is at ring testing arrangement, testing arrangement includes digital simulation analogue means, linear converting unit, and circuit control device is surveyed to controller and quilt, digital simulation analogue means respectively with linear converting unit with the controller links to each other, the linear change unit with it links to each other to be surveyed circuit control device, the controller with linear converting unit links to each other. The utility model provides a dc -to -ac converter is at ring testing arrangement can avoid safety problems such as high voltage and high current, saves the type test cost, improves detection efficiency, the type test testing result can be approached more accurately, the performance that truly is incorporated into the power networks of this dc -to -ac converter is reflected, logarithmic word volume signal carries out corresponding interpolation compensation simultaneously, improves hardware at the ring measuring accuracy.
Description
Technical field
The utility model relates to a kind of proving installation, specifically relates to a kind of inverter at ring test device
Background technology
Along with the progressively increase of new energy grid-connected power scale, the new energy grid-connected power devices such as photovoltaic combining inverter just more and more access electrical network, and its grid-connected characteristic performance quality has become the key factor affecting power network safety operation.Therefore, quick, accurate, the efficient detection that how to realize photovoltaic inverter grid-connected characteristic become the key link that can photovoltaic generation grid-connected smoothly.
In parallel network power generation, because the generated energy of photovoltaic module and characteristics of output power are by the impact of solar irradiance and environment temperature, cause reflecting that the DC source that photovoltaic array under complicated weather condition exports volt-ampere characteristic involves great expense, and along with tested photovoltaic combining inverter capacity increase, DC source needed for grid-connected detection and the also corresponding increase of electric network fault analogue means capacity, cause photovoltaic DC-to-AC converter type approval test testing cost huge; All relating to high-power due in test at the scene, all there is serious potential safety hazard to on-the-spot test personnel in heavy current Hi-pot test.
At photovoltaic DC-to-AC converter detection field, America and Europe is multinational establishes national solar energy research laboratory, carry out solar photovoltaic technology and corresponding detection technique research, as the world-famous test authentication centers such as U.S. UL safety test institute, German T ü V technical supervision meeting, German the Institution of Electrical Engineers (VDE), Britain Intertek have built or had some world-class photovoltaic generating system test laboratories by combining the mode set up, carry out a large amount of testing.The RISO National Laboratory of Denmark, Dutch ECN laboratory etc. establish multiple generation of electricity by new energy device numerical model analysis emulation platform based on RTDS or RT-LAB, for carrying out the research of control algolithm.But promote detection efficiency in the emulation of utilization numerical model analysis, there is not been reported to set up inverter hardware-in―the-loop test device aspect.
Domestic existing Duo Jia scientific research institutions and colleges and universities at present establish power system real-time simulation platform; as Chinese DianKeYuan electric system simulation national engineering laboratory, State Network Electric Power Research Institute, Central China University of Science and Technology's electric power safety and key lab of efficient Hubei Province etc., but be mainly used in the research field such as relay protection and D.C. high voltage transmission.And in new energy field, only have several the Research Centers such as south electric network and the Central China University of Science and Technology in one's power colleges and universities to large-scale wind electricity, grid-connectedly carry out Research on Real-time Simulation, set up corresponding hardware-in-the-loop simulation model, and to circuit control device, test is carried out for employing hardware-in―the-loop test device establishing criteria, improve detection efficiency, saving testing cost aspect still belongs to blank.
Utility model content
For the deficiencies in the prior art, the purpose of this utility model is to provide a kind of inverter at ring test device, realizes detecting the high-performance of inverter control system and overall performance, reduces type approval test testing cost, improves detection efficiency
For realizing above-mentioned object, the utility model provides a kind of inverter at ring test device, and described proving installation comprises digital simulation device, linear transform unit, controller and tested circuit control device; Described digital simulation device is connected with described controller with described linear transform unit respectively, and described linear change unit is connected with described tested circuit control device, and described controller is connected with described linear transform unit.
Preferably, described digital simulation device comprises the grid disturbance generating means, low voltage crossing proving installation, transformer module, anti-islanding proving installation, photovoltaic DC-to-AC converter loop of power circuit model and the photovoltaic array model that connect in turn;
Described linear change unit comprises physical I/O card and signal madulation module;
Described controller comprises CPU processor;
Described tested circuit control device comprises A/D module, feedback module, digital signal load module and digital signal output modules.
Preferably, described physical I/O card comprises digital input card, digital output card, analog input card and analog output card; Signal madulation module comprises Signal-regulated kinase A and Signal-regulated kinase B.
Preferably, described Signal-regulated kinase A is connected with described photovoltaic array model with described grid disturbance generating means, described low voltage crossing proving installation, described anti-islanding proving installation, described photovoltaic DC-to-AC converter loop of power circuit model respectively.
Preferably, described analog output card is connected with described Signal-regulated kinase A.
Preferably, described digital input card is connected with described digital simulation device.
Preferably, described digital output card is connected with described digital simulation device.
Preferably, described Signal-regulated kinase B is connected with described digital simulation device.
Preferably, described analog input card is connected with described Signal-regulated kinase B.
Preferably, described CPU processor is connected with described analog output card.
Preferably, described analog output card is connected with described A/D module.
Preferably, described digital input card is connected with described digital signal output modules.
Preferably, described digital output card is connected with described digital signal load module.
Preferably, described A/D module, described feedback module are connected in turn with described digital signal output modules.
Preferably, described digital signal load module is connected with described feedback module.
Compared with immediate prior art, excellent effect of the present utility model is:
(1) contrast with existing type experiment detection device, digital simulation model in the utility model inverter hardware-in―the-loop test device, modeling is carried out completely according to the parameter of photovoltaic inverter grid-connected performance detecting platform in existing type test, the primary circuit of whole photovoltaic inverter grid-connected performance detecting platform is stored in emulator with the form of realistic model, the safety problems such as high-voltage large current can be avoided, save pattern experimentation cost, improve detection efficiency;
(2) contrast with existing type experiment detection device, the utility model inverter hardware-in―the-loop test device can be difficult to the multiple measurement condition of simulating in comprehensive simulated type approval test, hardware-in―the-loop test under limiting condition is carried out to circuit control device, full test is carried out to grid-connected inverters performance;
(3) compared with existing Digital Simulation device, digital simulation model is connected with actual inverter controller by linear interface unit by the utility model inverter hardware-in―the-loop test device, hardware-in―the-loop test is carried out to inverter, only need to carry out Accurate Model to each testing apparatus of photovoltaic inverter grid-connected performance, do not need to carry out identification to inverter self control algolithm, pattern testing inspection result can be approached more accurately, reflect the true grid-connected performance of this inverter.
(4) other hardware-in―the-loop test devices are compared, the utility model inverter hardware-in―the-loop test device is the needs fully meeting the high accuracy number amount inputs such as power electronics pwm pulse, dead band, export, line pipe reason is sticked into physical I/O, corresponding Interpolation compensation is carried out to digital quantity signal simultaneously, improve hardware-in―the-loop test precision.
(5) the utility model inverter hardware-in―the-loop test device, this utility model can provide hardware-in―the-loop test platform for the grid-connected Performance Detection business of carrying out according to GB GB/T19964-2012, can enrich and improve coherent detection standard.
Accompanying drawing explanation
Fig. 1 is that the utility model inverter is at ring test structure drawing of device;
Fig. 2 is the utility model tested circuit control device hardware-in―the-loop test block diagram;
Fig. 3 is that the utility model three-phase power grid voltage drops to 20% rated voltage hardware-in―the-loop test waveform;
Fig. 4 is that the utility model three-phase power grid voltage drops to 20% rated voltage type approval test waveform.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in further detail.
As shown in Figure 1, described proving installation comprises digital simulation device, linear transform unit, controller and tested circuit control device; Described digital simulation device is connected with described controller with described linear transform unit respectively, and described linear change unit is connected with described tested circuit control device, and described controller is connected with described linear transform unit.Described digital simulation device comprises the grid disturbance generating means, low voltage crossing proving installation, transformer module, anti-islanding proving installation, photovoltaic DC-to-AC converter loop of power circuit model and the photovoltaic array model that connect in turn; Described linear change unit comprises physical I/O card and signal madulation module; Described controller comprises CPU processor; Described CPU processor receives the detection data from digital simulation device, and carries out analyzing and processing to relevant data.Described tested circuit control device comprises A/D module, feedback module, digital signal load module and digital signal output modules.Described physical I/O card comprises digital input card, digital output card, analog input card and analog output card; Signal madulation module comprises Signal-regulated kinase A and Signal-regulated kinase B.Described Signal-regulated kinase A is connected with described photovoltaic array model with described grid disturbance generating means, described low voltage crossing proving installation, described anti-islanding proving installation, described photovoltaic DC-to-AC converter loop of power circuit model respectively; Described Signal-regulated kinase A, for receiving the voltage signal of described grid disturbance generating means and described low voltage crossing proving installation, receives the voltage and current signal of described anti-islanding proving installation, described photovoltaic DC-to-AC converter loop of power circuit model and described photovoltaic array model.Described analog output card is connected with described Signal-regulated kinase A.Described digital input card is connected with described digital simulation device, and device control signal and loop of power circuit pulse signal are sent to described digital simulation device by described digital input card.Described digital output card is connected with described digital simulation device.Described Signal-regulated kinase B is connected with described digital simulation device, for pre-set parameter being sent to described digital simulation device.Described analog input card is connected with described Signal-regulated kinase B.Described CPU processor is connected with described analog output card, to carrying out physical I/O card management, carrying out corresponding Interpolation compensation simultaneously, improve hardware-in―the-loop test precision to the signal by digital input card and digital output card.Described analog output card is connected with described A/D module.Described digital input card is connected with described digital signal output modules.Described digital output card is connected with described digital signal load module.Described A/D module, described feedback module are connected in turn with described digital signal output modules.Described digital signal load module is connected with described feedback module.
Tested circuit control device carries out closed loop by linear transform unit and hardware-in-the-loop simulation module and is connected, and carries out hardware-in―the-loop test to inverter.
Electric network model line voltage is 10kV, and internal resistance is 2.5 Ω, and electrical network connects through 270:10kV transformer with inverter.
As shown in Figure 3-4, hardware-in-the-loop simulation module is connected with tested circuit control device by linear transform unit, can carry out low voltage crossing hardware-in―the-loop test to tested controller.
Accompanying drawing 3 drops to 20% rated voltage hardware-in―the-loop test waveform for three-phase power grid voltage.Can be obtained by data analysis: dip duration is 631ms, tested photovoltaic DC-to-AC converter controller can realize low voltage crossing; And during Voltage Drop generation, DC bus-bar voltage rises to 0.9p.u., and three-phase current does not almost have transient state over-current phenomenon avoidance; Low voltage crossing process median generatrix voltage is without obvious fluctuation, and the dynamic reactive electric current injected to electrical network is 1.06p.u., and the response time is 21ms, and the duration is 619ms, and it is 35.9% rated voltage that voltage stable state falls the degree of depth; Voltage resume moment, electric current slowly increases, and electric current and voltage is without impact phenomenon, and power regeneration rate is 1734kW/s.
Accompanying drawing 4 drops to 20% rated voltage type approval test waveform for three-phase power grid voltage, and carrying out data analysis can obtain: dip duration is 630ms, and tested photovoltaic DC-to-AC converter controller can realize low voltage crossing; And during Voltage Drop generation, DC bus-bar voltage rises to 0.9p.u., and three-phase current does not almost have transient state over-current phenomenon avoidance; Low voltage crossing process median generatrix voltage is without obvious fluctuation, and the dynamic reactive electric current injected to electrical network is 1.05p.u., and the response time is 20ms, and the duration is 627ms, and it is 36% rated voltage that voltage stable state falls the degree of depth; Voltage resume moment, electric current slowly increases, and electric current and voltage is without impact phenomenon, and power regeneration rate is 1702kW/s.
Contrasted can be found by accompanying drawing 3 and accompanying drawing 4, when three-phase power grid voltage drops to 20% rated voltage, hardware-in―the-loop test waveform and type approval test waveform height approach, and can reflect the true grid-connected performance of this inverter.
Finally should be noted that: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit, although be described in detail the utility model with reference to above-described embodiment, those of ordinary skill in the field are to be understood that: still can modify to embodiment of the present utility model or equivalent replacement, and not departing from any amendment of the utility model spirit and scope or equivalent replacement, it all should be encompassed in the middle of right of the present utility model.
Claims (10)
1. inverter is at a ring test device, it is characterized in that, described proving installation comprises digital simulation device, linear transform unit, controller and tested circuit control device; Described digital simulation device is connected with described controller with described linear transform unit respectively, and described linear transform unit is connected with described tested circuit control device, and described controller is connected with described linear transform unit;
Described digital simulation device comprises the grid disturbance generating means, low voltage crossing proving installation, transformer module, anti-islanding proving installation, photovoltaic DC-to-AC converter loop of power circuit model and the photovoltaic array model that connect in turn;
Described linear change unit comprises physical I/O card and signal madulation module;
Described controller comprises CPU processor;
Described tested circuit control device comprises A/D module, feedback module, digital signal load module and digital signal output modules.
2. a kind of inverter as claimed in claim 1 is at ring test device, it is characterized in that, described physical I/O card comprises digital input card, digital output card, analog input card and analog output card; Signal madulation module comprises Signal-regulated kinase A and Signal-regulated kinase B.
3. a kind of inverter as claimed in claim 2 is at ring test device, it is characterized in that, described analog output card is connected with described Signal-regulated kinase A; Described Signal-regulated kinase A is connected with described photovoltaic array model with described grid disturbance generating means, described low voltage crossing proving installation, described anti-islanding proving installation, described photovoltaic DC-to-AC converter loop of power circuit model respectively.
4. a kind of inverter as claimed in claim 2 is at ring test device, it is characterized in that, described digital input card is connected with described digital simulation device; Described digital output card is connected with described digital simulation device.
5. a kind of inverter as claimed in claim 2 is at ring test device, it is characterized in that, described Signal-regulated kinase B is connected with described digital simulation device.
6. a kind of inverter as claimed in claim 2 is at ring test device, it is characterized in that, described analog input card is connected with described Signal-regulated kinase B.
7. a kind of inverter as claimed in claim 2 is at ring test device, it is characterized in that, described CPU processor is connected with described analog output card.
8. a kind of inverter as claimed in claim 2 is at ring test device, it is characterized in that, described analog output card is connected with described A/D module.
9. a kind of inverter as claimed in claim 2 is at ring test device, it is characterized in that, described digital input card is connected with described digital signal output modules; Described digital output card is connected with described digital signal load module.
10. a kind of inverter as claimed in claim 1 is at ring test device, it is characterized in that, described A/D module, described feedback module are connected in turn with described digital signal output modules; Described digital signal load module is connected with described feedback module.
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| CN105527512A (en) * | 2015-11-27 | 2016-04-27 | 北京京仪绿能电力系统工程有限公司 | DSP-based embedded virtual test system |
| CN106803671A (en) * | 2015-11-26 | 2017-06-06 | 中国电力科学研究院 | A kind of photovoltaic plant low voltage ride-through capability appraisal procedure |
| CN106849113A (en) * | 2015-12-03 | 2017-06-13 | 中国电力科学研究院 | A kind of idle work optimization device appraisal procedure based on numerical model analysis emulation |
| CN107544283A (en) * | 2017-07-04 | 2018-01-05 | 华北电力大学（保定） | A kind of semi-matter simulating system based on virtual synchronous generator control strategy |
| CN108459226A (en) * | 2018-04-24 | 2018-08-28 | 合肥市艾特米信息技术有限公司 | Photovoltaic DC-to-AC converter automatization test system |
| CN109782732A (en) * | 2018-12-28 | 2019-05-21 | 上海电器科学研究所（集团）有限公司 | A kind of half circuit control device test platform in kind |
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| CN114675095A (en) * | 2020-12-27 | 2022-06-28 | 核工业理化工程研究院 | Three-level inverter debugging method and device based on semi-physical simulation |
| RU2781673C1 (en) * | 2021-05-14 | 2022-10-17 | федеральное государственное автономное образовательное учреждение высшего образования "Национальный исследовательский университет ИТМО" (Университет ИТМО) | Test bench for power electricity converters of distributed micro power supply systems with alternative power sources |
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2015
- 2015-05-29 CN CN201520357712.9U patent/CN204758716U/en active Active
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| CN106803671A (en) * | 2015-11-26 | 2017-06-06 | 中国电力科学研究院 | A kind of photovoltaic plant low voltage ride-through capability appraisal procedure |
| CN105527512B (en) * | 2015-11-27 | 2018-12-18 | 北京京仪绿能电力系统工程有限公司 | Embedded virtual test system based on DSP |
| CN105527512A (en) * | 2015-11-27 | 2016-04-27 | 北京京仪绿能电力系统工程有限公司 | DSP-based embedded virtual test system |
| CN106849113A (en) * | 2015-12-03 | 2017-06-13 | 中国电力科学研究院 | A kind of idle work optimization device appraisal procedure based on numerical model analysis emulation |
| CN107544283A (en) * | 2017-07-04 | 2018-01-05 | 华北电力大学（保定） | A kind of semi-matter simulating system based on virtual synchronous generator control strategy |
| CN108459226A (en) * | 2018-04-24 | 2018-08-28 | 合肥市艾特米信息技术有限公司 | Photovoltaic DC-to-AC converter automatization test system |
| CN110632532A (en) * | 2018-06-21 | 2019-12-31 | 中国电力科学研究院有限公司 | Test system and method for meeting parallel operation of multiple groups of string-type photovoltaic inverters |
| CN109782732A (en) * | 2018-12-28 | 2019-05-21 | 上海电器科学研究所（集团）有限公司 | A kind of half circuit control device test platform in kind |
| CN110442042A (en) * | 2019-08-13 | 2019-11-12 | 华北电力大学 | Electric car accesses electric power electric transformer number physical mixed real-time emulation system |
| CN110442042B (en) * | 2019-08-13 | 2021-01-15 | 华北电力大学 | Digital physical hybrid real-time simulation system for electric vehicle to be connected with power electronic transformer |
| CN114675095A (en) * | 2020-12-27 | 2022-06-28 | 核工业理化工程研究院 | Three-level inverter debugging method and device based on semi-physical simulation |
| RU2781673C1 (en) * | 2021-05-14 | 2022-10-17 | федеральное государственное автономное образовательное учреждение высшего образования "Национальный исследовательский университет ИТМО" (Университет ИТМО) | Test bench for power electricity converters of distributed micro power supply systems with alternative power sources |
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