CN203250000U - Low-voltage ride through data test system - Google Patents
Low-voltage ride through data test system Download PDFInfo
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- CN203250000U CN203250000U CN 201320059382 CN201320059382U CN203250000U CN 203250000 U CN203250000 U CN 203250000U CN 201320059382 CN201320059382 CN 201320059382 CN 201320059382 U CN201320059382 U CN 201320059382U CN 203250000 U CN203250000 U CN 203250000U
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Abstract
The utility model relates to a low-voltage ride through data test system, comprising a low-voltage generating device, a control device connected with the low-voltage generating device and used for controlling voltage dropping depth of a test point, a detection device acquiring voltage and current of the test point, an industrial personal computer connected with the control device and the detection device. The industrial personal computer is used to set voltage dropping depth, voltage dropping duration time, and is used to detect voltage and current data of the test point. The system provides the low-voltage generating device between an external power grid and a wind power converter and through adjusting partial voltage ratio of a first adjustable reactor and a second adjustable reactor in the low-voltage generating device, real-time acquisition of different dropping grade dropout voltage data of a tested wind power converter is realized. The system can also complete various wind turbine generator low-voltage ride through tests.
Description
Technical field
This practicality belongs to the new-energy grid-connected field tests, relates in particular to a kind of low-voltage ride-through testing system that the wind-force frequency converter is used that is suitable for.
Background technology
At present, the Wind Power In China unit huge market demand, the most of wind-powered electricity generation units that dispatch from the factory do not have low voltage ride-through function, have the wind-powered electricity generation unit of low voltage ride-through function mostly not pass through Site Detection.Therefore, need to launch low voltage ride-through capability of wind turbine generator system in China detects.
Along with wind-power electricity generation proportion in electric power energy is increasing, wind generator system can not be ignored the impact of electrical network.Concentrate on a large scale especially the mode of access for China's wind-powered electricity generation, when electrical network breaks down when causing the point voltage that is incorporated into the power networks to fall, in case wind-powered electricity generation unit automatic trip net may cause the collapse of line voltage and frequency, have a strong impact on the safe and stable operation of electrical network, the application of this clean energy resource of wind-power electricity generation is restricted.Therefore, the wind-powered electricity generation unit that is incorporated into the power networks on a large scale must have low voltage ride-through capability (Low Voltage Ride Through, LVRT), and whether wind power frequency converter has low voltage ride-through capability, whether can when electrical network generation instantaneous short circuit fault, continue to provide the power support, this will be to the whole electrical network of China, and especially the area power grid tool of wind-powered electricity generation installation large percentage is of great significance.So how designing a kind of low voltage crossing data acquisition system (DAS) for test and experiment is the technical barrier of this area.
The utility model content
The technical problems to be solved in the utility model provides a kind of low-voltage ride-through testing system that is suitable for automatically monitoring wind-force frequency converter and real time record drop-off voltage data, this low-voltage ride-through testing system provides the low voltage generating device between external power grid and wind power frequency converter, by regulating the dividing potential drop ratio of first, second REgulatable reactor in the low voltage generating device, realized that tested wind-force frequency converter difference falls the drop-off voltage data acquisition of grade, can finish various LVRT Capability of Wind Turbine Generator testing experiments.
In order to solve the problems of the technologies described above, the utility model provides a kind of low voltage crossing data testing system, comprise: low voltage generating device, the voltage that being suitable for of linking to each other with described low voltage generating device controlled test point falls the control device of the degree of depth, gather the pick-up unit of described test point voltage and current, with the industrial computer that described control device, pick-up unit link to each other, this industrial computer is suitable for setting described voltage and falls the described test point voltage and current of the degree of depth, voltage dip duration and detection data.
Further, described control device is the PLC device; Described low voltage generating device comprises: first, second REgulatable reactor forms partial pressure type impedance circuit, that is, first, second REgulatable reactor is connected to regulate the respective impedance value and changed described voltage and fall the degree of depth; Described PLC device links to each other with the impedance adjustment end of described first, second REgulatable reactor.
Further, described pick-up unit is the PXI system.
Further, described PXI system links to each other with described industrial computer by Ethernet.
Further, described PLC device links to each other with described industrial computer by Ethernet.
Technique scheme of the present utility model has the following advantages compared to existing technology: this low voltage crossing data testing system provides the low voltage generating device between external power grid and wind power frequency converter, by regulating the dividing potential drop ratio of first, second REgulatable reactor in the low voltage generating device, realized that tested wind-force frequency converter difference falls the Real-time Collection of the drop-off voltage data of grade, and can finish various LVRT Capability of Wind Turbine Generator testing experiments.
Description of drawings
For content of the present utility model is more likely to be clearly understood, below the specific embodiment and by reference to the accompanying drawings of basis, the utility model is described in further detail, wherein
Fig. 1 is the structural representation of low voltage crossing data testing system of the present utility model;
Fig. 2 is the circuit diagram of low voltage generating device of the present utility model.
Embodiment
The present invention is described in detail below in conjunction with drawings and Examples:
See Fig. 1, a kind of low voltage crossing data testing system, comprise: low voltage generating device, the voltage that being suitable for of linking to each other with described low voltage generating device controlled test point falls the control device of the degree of depth, gather the pick-up unit of described test point voltage and current, with the industrial computer that described control device, pick-up unit link to each other, this industrial computer is suitable for setting described voltage and falls the described test point voltage and current of the degree of depth, voltage dip duration and detection data.
Described low voltage crossing data testing system can also be divided into slave computer and host computer.Slave computer is described pick-up unit, gathers original voltage and current signal by respective sensor, and described voltage and current signal is carried out analyzing and processing, obtains the data of testing requirements.Host computer is industrial computer and divides two parts, and a part obtains the data of slave computer analyzing and processing by ethernet communication, and is presented on the display.Another part carries out corresponding control by ethernet communication to the PLC device, pass through on the PLC device to connect from first, the impedance adjustment end of the second REgulatable reactor, isolating switch, signal wire on the disconnector, can carry out described first by inside programming, the second REgulatable reactor gear is regulated, the isolating switch folding condition monitors and control, the supervision of disconnector folding condition, host computer connects by ethernet communication and PLC, and then described low voltage crossing data testing system can be to first in the low voltage generating device, the second REgulatable reactor, each isolating switch, each disconnector etc. is monitored.Can manually or by PLC automatically regulate the reactor gear, make it satisfy voltage and fall grade.
See Fig. 2, described control device is the PLC device; Described low voltage generating device comprises: first, second REgulatable reactor forms partial pressure type impedance circuit, that is, the first REgulatable reactor 1, the second REgulatable reactor 2 are connected to regulate the respective impedance value and changed described voltage and fall the degree of depth; Described PLC device links to each other with each impedance adjustment end of described the first REgulatable reactor 1, the second REgulatable reactor 2.In the corresponding diagram, AH1.QS, AH3.QS, AH4.QS, AH5.QS1, AH5.QS2 are disconnector, and AH1.QF, AH2.QF, AH3.QF, AH5.QF are isolating switch.AH2.QF is kept closed with AH5.QF and remains open state before the test.Wherein, the A point measurement be net side (connecing external power grid), the electric current and voltage that A is ordered namely represents the electric current and voltage of grid side; The B point measurement be load, the electric current and voltage that B is ordered represents the electric current and voltage that grid side is received in load (wind power frequency converter), is understood as the electric current and voltage of load grid side; The C point measurement be the electric current and voltage that voltage falls; That is, the B point current summation of ordering with C equals the electric current that A is ordered.
By described industrial computer, disconnect AH2.QF, closed AH5.QF, operating personnel's trigger voltage is fallen start signal, after obtaining order, recording voltage falls the data in front 5 seconds automatically, after 5 seconds, voltage is fallen order send on the PLC device, PLC device control low voltage generating device carries out voltage according to the time of setting and falls with voltage and recover.After the off-test, described low voltage crossing data testing system continues collection data in 6 second according to behind the off-test signal that obtains, and automatically stops data acquisition after the time finishes, and finishes whole process of the test.Above-mentionedly exemplified concrete embodiment, also can be according to the test needs by described industrial computer Set arbitrarily required time.
Described pick-up unit is the PXI system, and described PXI system (PCI extensions for Instrumentation is towards the PCI expansion of instrument system) is a kind of firm measurement and robotization platform based on PC by the issue of NI company.The characteristic that PXI combines soundness, modularization and the Eurocard mechanical encapsulation of the electric bus characteristic of PCI and CompactPCI develop into be suitable for testing, measurement and the machinery of data acquisition applications, electric and software specifications.The purpose of working out the PXI standard is ideally to combine for the ratio of performance to price advantage of Desktop PC is expanded towards necessity of instrument field with pci bus, forms a kind of virtual instrument test platform of main flow.This becomes it and measures and the high-performance of automated system, low-cost carrying platform.
Described PXI system links to each other with described industrial computer by Ethernet.
Described PLC device links to each other with described industrial computer by Ethernet.
Described low voltage crossing data testing system can also further carry out analytical calculation to the primary voltage current signal that records in the experimentation, obtains falling the oscillogram of point voltage effective value, active power, reactive power, active current, reactive current; That is, the electric current and voltage of ordering by measuring B calculates active power, reactive power, active current, reactive current.。By showing the instantaneous voltage current waveform, make things convenient for the fault analysis of wind power frequency converter in the low voltage crossing process.
Obviously, above-described embodiment only is for the utility model example clearly is described, and is not to be restriction to embodiment of the present utility model.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give all embodiments exhaustive.And these belong to apparent variation or the change that spirit of the present utility model extended out and still are among the protection domain of the present utility model.
Claims (5)
1. low voltage crossing data testing system, it is characterized in that comprising: low voltage generating device, the voltage that being suitable for of linking to each other with described low voltage generating device controlled test point falls the control device of the degree of depth, gather the pick-up unit of described test point voltage and current, with the industrial computer that described control device, pick-up unit link to each other, this industrial computer is suitable for setting described voltage and falls the described test point voltage and current of the degree of depth, voltage dip duration and detection data.
2. low voltage crossing data testing system according to claim 1, it is characterized in that: described control device is the PLC device; Described low voltage generating device comprises: first, second REgulatable reactor forms partial pressure type impedance circuit, that is, first, second REgulatable reactor is connected to regulate the respective impedance value and changed described voltage and fall the degree of depth; Described PLC device links to each other with the impedance adjustment end of described first, second REgulatable reactor.
3. low voltage crossing data testing system according to claim 2, it is characterized in that: described pick-up unit is the PXI system.
4. low voltage crossing data testing system according to claim 3 is characterized in that: described PXI system links to each other with described industrial computer by Ethernet.
5. low voltage crossing data testing system according to claim 4, it is characterized in that: described PLC device links to each other with described industrial computer by Ethernet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320059382 CN203250000U (en) | 2013-07-26 | 2013-07-26 | Low-voltage ride through data test system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320059382 CN203250000U (en) | 2013-07-26 | 2013-07-26 | Low-voltage ride through data test system |
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| CN203250000U true CN203250000U (en) | 2013-10-23 |
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| CN 201320059382 Expired - Fee Related CN203250000U (en) | 2013-07-26 | 2013-07-26 | Low-voltage ride through data test system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104184412A (en) * | 2014-09-05 | 2014-12-03 | 国家电网公司 | Photovoltaic power station low-voltage ride-through movement detection automatic control system |
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2013
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104184412A (en) * | 2014-09-05 | 2014-12-03 | 国家电网公司 | Photovoltaic power station low-voltage ride-through movement detection automatic control system |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131023 Termination date: 20160726 |
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| CF01 | Termination of patent right due to non-payment of annual fee |