CN104345222A - Low-voltage ride through system - Google Patents
Low-voltage ride through system Download PDFInfo
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- CN104345222A CN104345222A CN201310321120.7A CN201310321120A CN104345222A CN 104345222 A CN104345222 A CN 104345222A CN 201310321120 A CN201310321120 A CN 201310321120A CN 104345222 A CN104345222 A CN 104345222A
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- 238000012360 testing method Methods 0.000 claims abstract description 21
- 238000009434 installation Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
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Abstract
The invention relates to a low-voltage ride through system comprising an upper computer, a power transmitter, a touch control module, a voltage test device, an external power grid and a tested wind turbine generator set. A first circuit is formed by the external power grid and the tested wind turbine generator set. The first circuit is provided with the voltage test device. In the first circuit, the touch control module is connected in parallel with the voltage test device, and the upper computer and the power transmitter are also connected in parallel with the voltage test device. Accurate control of voltage drop is realized and bearing capacity of power grid users is also considered.
Description
Technical field
The present invention relates to a kind of low voltage ride through system.
Background technology
The Wind turbines that large-scale grid connection is run must have low voltage ride-through capability (Low Voltage RideThrough, LVRT).Wind turbines is grid-connected must meet corresponding technical standard, and only have when grid voltage sags just allows aerogenerator off-grid lower than regulation curve later, when voltage is at sunk part, generator should provide reactive power.[0003] current, the European countries such as Denmark, Germany have formulated new operation of power networks criterion, and the Wind turbines Grid-connection standards that range of application is wider is " the grid-connected directive/guide of European E.ON "; At home, State Grid Corporation of China has also issued " wind farm grid-connected technical stipulation ".But current domestic test and means of testing scarcity, still can not develop the low voltage crossing proving installation (voltage sag generator) matched with technical standard.
Existing wind generator system low voltage crossing proving installation scheme has following 3 classes: impedance dividing potential drop form, transformer-type and Technics of Power Electronic Conversion form.Wherein, based on the low voltage crossing proving installation that impedance dividing potential drop form realizes, with regard to domestic, CLP Purui Technology Co., Ltd of China Electric Power Research Institute LVRT-6M, LVRT-3M Series Mobile low voltage crossing proving installation is mainly contained.This device Voltage Drop and recovery realize by changing impedance intrinsic standoff ratio, meets the technical requirement about low voltage crossing test in European and American countries Wind turbines Grid-connection standards and State Grid Corporation of China's company standard " wind-electricity integration technical stipulation ".But, also there is certain weak point in this device, as its test point voltage can drop in 90%, 80%, 75%, 70%, 60%, 50%, 40%, 30%, 20%, 10%, 0% electric pressure, this is only confined to specific electric pressure, the Voltage Drop degree of depth is not continuously adjustabe, less Voltage Drop can not be met and recover accuracy requirement, simultaneously also by the impact of load change.
Summary of the invention
The technical problem to be solved in the present invention is: overcome the deficiencies in the prior art, provides a kind of low voltage ride through system, realizes electrical voltage system test.
The technical solution adopted for the present invention to solve the technical problems is: a kind of low voltage ride through system, comprise host computer, power transducer, touch-control module and voltage test device, external electrical network and tested Wind turbines, described external electrical network and tested Wind turbines form the first circuit, the first described circuit is provided with voltage test device, the first described circuit is parallel with touch-control module with voltage test device and is parallel with host computer and power transducer.
Further, described voltage test device, touch-control module and host computer form circuit and are connected.
The invention has the beneficial effects as follows: realize while Voltage Drop accurately controls, also having taken into account the ability to bear of power grid user.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is further described.
Fig. 1 is structural representation of the present invention;
Wherein: 1, external electrical network, 2, tested Wind turbines.
Embodiment
The present invention is further illustrated by reference to the accompanying drawings now.The schematic diagram that these accompanying drawings are simplification only illustrates basic structure of the present invention in a schematic way, and therefore it only shows the formation relevant with the present invention.
As shown in Figure 1, a kind of low voltage ride through system, comprise host computer, power transducer, touch-control module and voltage test device, external electrical network 1 and tested Wind turbines 2, external electrical network 1 and tested Wind turbines 2 form the first circuit, first circuit is provided with voltage test device, the first circuit is parallel with touch-control module with voltage test device and is parallel with host computer and power transducer.
Voltage test device, touch-control module and host computer form circuit and are connected.Realize while Voltage Drop accurately controls, also having taken into account the ability to bear of power grid user.
With above-mentioned according to desirable embodiment of the present invention for enlightenment, by above-mentioned description, relevant staff in the scope not departing from this invention technological thought, can carry out various change and amendment completely.The technical scope of this invention is not limited to the content on instructions, must determine its technical scope according to right.
Claims (2)
1. a low voltage ride through system, it is characterized in that: comprise host computer, power transducer, touch-control module and voltage test device, external electrical network and tested Wind turbines, described external electrical network and tested Wind turbines form the first circuit, the first described circuit is provided with voltage test device, the first described circuit is parallel with touch-control module with voltage test device and is parallel with host computer and power transducer.
2. a kind of low voltage ride through system according to claim 1, is characterized in that: described voltage test device, touch-control module and host computer form circuit and be connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310321120.7A CN104345222A (en) | 2013-07-29 | 2013-07-29 | Low-voltage ride through system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310321120.7A CN104345222A (en) | 2013-07-29 | 2013-07-29 | Low-voltage ride through system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104345222A true CN104345222A (en) | 2015-02-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310321120.7A Pending CN104345222A (en) | 2013-07-29 | 2013-07-29 | Low-voltage ride through system |
Country Status (1)
| Country | Link |
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| CN (1) | CN104345222A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060087124A1 (en) * | 2002-12-20 | 2006-04-27 | Stahlkopf Karl E | Power control interface between a wind farm and a power transmission system |
| CN101846707A (en) * | 2010-02-04 | 2010-09-29 | 艾默生网络能源有限公司 | Equipment and method for riding through testing platform at low voltage on low-voltage side |
| CN102129036A (en) * | 2011-01-07 | 2011-07-20 | 中电普瑞科技有限公司 | Movable low-voltage ride-through testing device for wind generating set |
| CN102435882A (en) * | 2011-09-24 | 2012-05-02 | 国网电力科学研究院 | Low-voltage ride-through detection device for grid-connected photovoltaic inverter with passive reactor structure |
| CN102664428A (en) * | 2012-05-25 | 2012-09-12 | 武汉大学 | Low-voltage ride-through system and testing method thereof |
| CN102684225A (en) * | 2012-05-25 | 2012-09-19 | 武汉大学 | Controllable electric reactor based low-voltage ride through system and test method thereof |
-
2013
- 2013-07-29 CN CN201310321120.7A patent/CN104345222A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060087124A1 (en) * | 2002-12-20 | 2006-04-27 | Stahlkopf Karl E | Power control interface between a wind farm and a power transmission system |
| CN101846707A (en) * | 2010-02-04 | 2010-09-29 | 艾默生网络能源有限公司 | Equipment and method for riding through testing platform at low voltage on low-voltage side |
| CN102129036A (en) * | 2011-01-07 | 2011-07-20 | 中电普瑞科技有限公司 | Movable low-voltage ride-through testing device for wind generating set |
| CN102435882A (en) * | 2011-09-24 | 2012-05-02 | 国网电力科学研究院 | Low-voltage ride-through detection device for grid-connected photovoltaic inverter with passive reactor structure |
| CN102664428A (en) * | 2012-05-25 | 2012-09-12 | 武汉大学 | Low-voltage ride-through system and testing method thereof |
| CN102684225A (en) * | 2012-05-25 | 2012-09-19 | 武汉大学 | Controllable electric reactor based low-voltage ride through system and test method thereof |
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| DD01 | Delivery of document by public notice |
Addressee: Qingdao Fate Electric Appliance Technology Co., Ltd. Document name: Notification of Passing Preliminary Examination of the Application for Invention |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| DD01 | Delivery of document by public notice |
Addressee: Qingdao Fate Electric Appliance Technology Co., Ltd. Document name: Notification of Publication and of Entering the Substantive Examination Stage of the Application for Invention |
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| DD01 | Delivery of document by public notice |
Addressee: Qingdao Fate Electric Appliance Technology Co., Ltd. Document name: the First Notification of an Office Action |
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| DD01 | Delivery of document by public notice |
Addressee: Qingdao Fate Electric Appliance Technology Co., Ltd. Document name: Notification that Application Deemed to be Withdrawn |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150211 |
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| WD01 | Invention patent application deemed withdrawn after publication |