CN103412260B - Voltage sag generator - Google Patents
Voltage sag generator Download PDFInfo
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- CN103412260B CN103412260B CN201310268995.5A CN201310268995A CN103412260B CN 103412260 B CN103412260 B CN 103412260B CN 201310268995 A CN201310268995 A CN 201310268995A CN 103412260 B CN103412260 B CN 103412260B
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Abstract
The invention discloses a kind of voltage sag generator, comprise Thyristor Controlled Reactor valve group, data acquisition unit and processing and control element (PCE), take voltage as control objectives, have employed Thyristor Controlled Reactor valve group, according to the needs of blower fan experiment, the function of single-phase experiment, two-phase experiment, three-phase experiment can be supported.Thyristor Controlled Reactor valve group technique mature and reliable, is widely applied in electric system, as Voltage Drop device, has excellent technical background, and moderate cost.Controlled by IGBT group, the Voltage Drop degree of depth can be regulated within the specific limits, can smoother adjustment rejuvenation, release time, length also can control flexibly.
Description
Technical field
The present invention relates to electric and electronic technical field, specifically, relate to a kind of voltage sag generator.
Background technology
Wind-power electricity generation as a kind of green regenerative energy sources, by occupation of more and more important position in electric system.In actual life, electric network fault is can hardly be avoided, if network system breaks down cause aerogenerator off-grid, then the stable operation of electric system will be had a strong impact on, along with the development of wind-power electricity generation, increasing wind field is connected to the grid, and the stable operation of low voltage ride-through capability (LowVoltageRideThrough, LVRT) to electric system of blower fan plays vital effect.But wind field is built remote, and by air speed influence, test is inconvenience comparatively, in order to the low voltage ride-through capability of development& testing aerogenerator, adopt voltage sag generator simulating grid fault, the performance of examination aerogenerator, for the experiment of aerogenerator is provided convenience.
Just disclosed at present patent, existing Voltage Drop device has transformer pattern, impedance pattern and Technics of Power Electronic Conversion formula, and concrete document is as follows:
The application for a patent for invention " a kind of electric network electric voltage drop generator " of document one to be publication number be CN101119074A.This application comprises thyristor control circuit, isolating transformer, step-down transformer, bypass thyristor, startup thyristor and thyristor driving circuit.Detect input voltage signal, determine anti-parallel thyristor: the Continuity signal of startup thyristor and bypass thyristor, the actuating signal of anti-parallel thyristor is sent at the zero crossing place of input signal, carried out the running status of controlled hypotension transformer by bypass thyristor and startup thyristor, change input voltage amplitude.The program is transformer type Voltage Drop device, and for common transformer, voltage ratio is nonadjustable, the fixing Voltage Drop degree of depth can only be obtained, be difficult to accurate control the actuation time of Voltage Drop simultaneously, of short duration voltage interruption may be occurred in using, there is certain risk.
The development of document two to be paper numbers be Beijing Jiaotong University's paper " low voltage crossing " (LVRT) proving installation of 1000409215218 ".The article disclose the voltage sag generator adopting impedance pattern, falling and once recovering and ladder recovery of voltage different brackets can be realized.The program is the Voltage Drop device of impedance pattern, and energy loss is comparatively large, and when Voltage Drop occurs, load-side to electrical network energy feeding, cannot cannot realize the functions such as wind-power electricity generation reactive power compensation.
The application for a patent for invention " control method of a kind of voltage sag generator, inverter and device " of document three to be publication numbers be CN102904458A.The generating means of this application comprises modular multilevel rectifier and modular multilevel inverter meaning connected mode of transmitting electricity back-to-back and is connected, and both construct identical.The program is Technics of Power Electronic Conversion formula Voltage Drop device, and by the restriction of device power, power grade can not do greatly.
In sum, existing voltage sag generator is roughly transformer pattern, impedance pattern and Technics of Power Electronic Conversion formula.Based on the voltage sag generator that transformer pattern realizes, be difficult to accurate control actuation time, may occur of short duration voltage interruption in using, and may occur larger voltage and current spike, this is very unfavorable to the test of wind generator system, very likely damage generator insulating and power electronic devices, when also having power larger, the volume of transformer and quality are very large, not Portable belt, the electrical equipment of contactor is limited for serviceable life, easily affected by environment simultaneously; Based on the voltage sag generator of impedance pattern, due to impedance run or Voltage Drop time flow through power, therefore powerful impedor must be selected, and energy loss is larger, when Voltage Drop occurs, load-side cannot to electrical network energy feeding simultaneously, cannot realize the functions such as wind-power electricity generation reactive power compensation, and when the load, the matching relationship of impedance also changes; Based on the voltage sag generator of Technics of Power Electronic Conversion formula, by the restriction of device power, power grade cannot do greatly, and cost is very high, controls complexity simultaneously, and reliability is not high enough.
Summary of the invention
For above-mentioned technical matters, the invention provides a kind of voltage sag generator, can line voltage be reduced, realize voltage decline abruptly, simulating grid fault.
The invention provides a kind of voltage sag generator, it comprises: Thyristor Controlled Reactor valve group, is connected on electrical network by reactor; Data acquisition unit, gathers the real-time voltage current analog signal of electrical network, is converted into digital voltage current signal; Processing and control element (PCE), be connected to receive with described data acquisition unit and transmit described digital voltage current signal, according to the experiment parameter preset and based on described digital voltage current signal generation for controlling the described conducting of Thyristor Controlled Reactor valve group and the control signal of closedown, wherein
When needs Voltage Drop, described processing and control element (PCE) sends the control signal of conducting to described Thyristor Controlled Reactor valve group, is linked in electrical network by described Thyristor Controlled Reactor valve group, regulates the conduction angle of thyristor, realizes Voltage Drop.
In a preferred embodiment of the present invention, described Thyristor Controlled Reactor valve group adopts three-phase wye connection, wherein,
The neutral ground of described Thyristor Controlled Reactor valve group, realizes that voltage is single-phase, two-phase is fallen; Or described Thyristor Controlled Reactor valve group isolated neutral, realize voltage three-phase and fall.
In a preferred embodiment of the present invention, described data acquisition unit also gathers and transmits the real-time current simulating signal of described Thyristor Controlled Reactor valve group and be converted into digital current signal, described digital current signal is arranged on one end and described the first disconnect that Thyristor Controlled Reactor valve group is connected, the other end is connected with electrical network for controlling, when the real-time current value of described Thyristor Controlled Reactor valve group exceedes preset range, described first disconnect disconnects, thus disconnects the connection of described Thyristor Controlled Reactor valve group and electrical network.
In a preferred embodiment of the present invention, also comprise the second disconnect, it is in parallel with described reactor, for realizing the reactive power compensation to electrical network.
In a preferred embodiment of the present invention, also comprise monitoring unit, receive the experiment parameter of user's setting and the experimental program of selection, and monitoring unit is connected to receive real-time digital voltage and current signal with described processing and control element (PCE).
In a preferred embodiment of the present invention, the experiment parameter that described user is arranged comprises the Voltage Drop release time that Voltage Drop amplitude, voltage dip duration and Voltage Drop return to normal value, and the experimental program that described user selects comprises generation Voltage Drop pattern and reactive-load compensation pattern.
In a preferred embodiment of the present invention, described processing and control element (PCE) comprises:
Calculate and processing module, receive and transmit described collecting unit the real-time digital voltage and current signal transmitted and the experiment parameter of user's setting and the experimental program of user's selection that receive the transmission of described monitoring unit, the rationality of the experiment parameter that the Voltage Drop scope preset according to device is arranged described user and the experimental program that described user selects judges, produces control signal;
Trigger pulse generation module, receives the control signal of described calculating and processing module, signal is converted to the control signal controlling described Thyristor Controlled Reactor valve group conducting and closedown;
Fault detection and diagnosis module, receive the real-time digital voltage and current signal that the control signal of described trigger pulse generation module and described calculating and processing module are transmitted, when described real-time digital voltage and current signal exceeds device preset range, carry out fault diagnosis, produce trip signal, turn off described first disconnect.
In a preferred embodiment of the present invention, the control algolithm for line voltage linearization being returned to former line voltage is provided with in described processing and control element (PCE).
The present invention brings following beneficial effect: the voltage sag generator that the present invention proposes, and is control objectives, have employed Thyristor Controlled Reactor valve group with voltage, according to the needs of blower fan experiment, can support the function of single-phase experiment, two-phase experiment, three-phase experiment.Thyristor Controlled Reactor valve group technique mature and reliable, is widely applied in electric system, as Voltage Drop device, has excellent technical background, and moderate cost.Controlled by IGBT group, the Voltage Drop degree of depth can be regulated within the specific limits, can smoother adjustment rejuvenation, release time, length also can control flexibly.
Other features and advantages of the present invention will be set forth in the following description, and, partly become apparent from instructions, or understand by implementing the present invention.Object of the present invention and other advantages realize by structure specifically noted in instructions, claims and accompanying drawing and obtain.
Accompanying drawing explanation
Fig. 1 is the Voltage Drop circuit for generating system according to the embodiment of the present invention;
Fig. 2 is the structured flowchart of the voltage sag generator according to the embodiment of the present invention;
Fig. 3 is the structured flowchart of data acquisition unit according to the embodiment of the present invention and processing and control element (PCE) and monitoring unit;
Fig. 4 is the Voltage Drop curve map produced according to the embodiment of the present invention.
Embodiment
Describe embodiments of the present invention in detail below with reference to drawings and Examples, to the present invention, how application technology means solve technical matters whereby, and the implementation procedure reaching technique effect can fully understand and implement according to this.It should be noted that, only otherwise form conflict, each embodiment in the present invention and each feature in each embodiment can be combined with each other, and the technical scheme formed is all within protection scope of the present invention.
In addition, can perform in the computer system of such as one group of computer executable instructions in the step shown in the process flow diagram of accompanying drawing, and, although show logical order in flow charts, but in some cases, can be different from the step shown or described by order execution herein.
As shown in Figure 1, which show the Voltage Drop circuit for generating system according to the embodiment of the present invention.It comprises:
Blower fan, 690/10kV transformer, 10kV/10kV isolating transformer, disconnect QF1, disconnect QF2, reactor L1, reactor L2, reactor L3, current transformer TA and thyristor controlled series compensation TCR.Wherein, 690/10kV transformer is connected with blower fan, reactance L1 is by plug-in strip ground connection, Thyristor Controlled Reactor valve group TCR is connected with reactor L1, current transformer TA is connected with Thyristor Controlled Reactor valve group TCR, reactor L2 is connected with current transformer TA, disconnect QF1 is connected with reactor L2, reactor L3 is connected with 690/10kV transformer with disconnect QF1, disconnect QF2 is in parallel with reactance L3,10kV/10kV transformer is connected with reactance L3, and 10kV/10kV transformer is connected to electrical network.
Particularly, the voltage of described blower fan generating is 690V, by 690/10kV transformer, voltage is become 10kV, 690/10kV transformer is connected with reactor L3, reactor L3 is connected with 10kV/10kV isolating transformer, and the circuit wherein between reactor L3 and 10kV/10kV isolating transformer is 10kV connecting line.
Wherein, reactor L1 is earthing reactor, during the single-phase fall-down test of thyristor controlled series compensation TCR, forms complete loops by reactor L1; Reactor L2 is Controlled Reactor, is regulated the capacity of reactor L2 by the conduction angle and then realization regulating thyristor; Reactor L3 is current limiting reactor, suppresses the curent change on 10kV connecting line too fast, the stability and security that ensuring equipment runs.
As shown in Figures 2 and 3, which show the voltage sag generator according to the embodiment of the present invention.It comprises:
Thyristor Controlled Reactor valve group 101, it is connected on electrical network by reactor L3.
In the present embodiment, Thyristor Controlled Reactor valve group 101 adopts three-phase wye connection, can form multiple electric loop, realizes single-phase experiment, two-phase experiment, three-phase experiential function.
Particularly, when single-phase experiment, two-phase experiment, the neutral ground of Thyristor Controlled Reactor valve group 101, three-phase transformer neutral ground, the 10kV connecting line phase voltage that voltage-current sensor is surveyed is acquisition monitoring target, meanwhile, and the neutral ground of 10kV/10kV isolating transformer; In three-phase experiment, the isolated neutral of Thyristor Controlled Reactor valve group 101, the line voltage of the 10kV connecting line that voltage-current sensor is surveyed is acquisition monitoring target, meanwhile, 10kV/10kV isolating transformer isolated neutral.
In addition, Thyristor Controlled reactance valve group is as Voltage Drop device, and its power capacity is slightly larger than power of fan capacity, and its turn on thyristors angle arranged is also less, and the Trigger Angle of about 105 ° less according to Thyristor Controlled reactance valve group carries out type selecting.
Data acquisition unit 102, utilizes voltage-current sensor to gather the real time modelling current signal in Thyristor Controlled Reactor valve group 101 and real time modelling voltage, the current signal on 10kV connecting line.Wherein, described real time modelling voltage signal comprises real-time phase voltage value and actual time line magnitude of voltage, and the real time analogue signals collected is converted into real time digital signal.
Particularly, in the present embodiment, modulus conversion chip is adopted to carry out isolating to the analog voltage signal collected and change.
More specifically, in the present embodiment, the modulus conversion chip of employing is AD7865 chip.
Monitoring unit 103, comprises parameter setting module 1031, data transmit-receive and processing module 1032, realtime curve/memory module 1033, Drawing of Curve module 1034 and fault alarm module 1035, particularly,
Parameter setting module 1031, receives the parameter of user's setting and the experimental program of user's selection.Wherein, the parameter that user is arranged comprises the Voltage Drop release time that Voltage Drop amplitude, voltage dip duration and Voltage Drop return to normal value, and the experimental program that user selects comprises generation Voltage Drop pattern, reactive-load compensation pattern.Particularly, the generation Voltage Drop pattern that user selects comprise produce single-phasely to fall, two-phase falls and falls three kinds with three-phase and fall mode;
Data transmit-receive and processing module 1032, receiving parameter arranges the relevant information of user's input of module transmission, and the rationality of the experimental program of the experiment parameter arranged user according to the Voltage Drop scope preset and user's selection tentatively judges;
Realtime curve/memory module 1033, shows and stores processor the real-time voltage current value of device;
Drawing of Curve module 1034, the data utilizing realtime curve/memory module 1033 to receive draw real-time voltage, current curve diagram and history voltage, current curve diagram according to passage of time;
Fault alarm module 1035, when described Voltage Drop device electric current and voltage operates in outside default scope, sends alerting signal, the safety of ensuring equipment.
Process monitoring unit 104, comprises control data transmitting-receiving and processing module 1041, calculates and processing module 1042, trigger pulse generation module 1043 and fault detection and diagnosis module 1044, particularly,
Control data transmitting-receiving and processing module 1041, receive the real-time digital voltage and current signal that data acquisition unit 102 transmits, receive the experiment parameter of user's setting that monitoring unit 103 transmits and the experimental program signal of user's selection, and rough handling is carried out to it, produce initial control signal;
Calculate and processing module 1042, receive the signal that data transmit-receive and processing module 1041 transmits, the rationality of the experimental program of the experiment parameter that the Voltage Drop scope preset according to device is arranged user and user's selection judges, generation control signal;
Trigger pulse generation module 1043, receives the control signal calculating and transmit with processing module 1042, is converted into the trigger pip triggering turn on thyristors and closedown in Thyristor Controlled Reactor valve group 101.Wherein, trigger mode is that photoelectricity triggers;
Fault detection and diagnosis module 1044, receive the real-time digital voltage and current signal calculating and monitor with processing module 1042, receive the return signal of trigger pulse generation module 1043, when receive digital voltage current value exceed device preset electric current and voltage safe range time, carry out fault diagnosis, produce trip signal, disconnect QF1, QF2 turn off, and described trip signal is transferred to monitoring unit 103.
Particularly, in the present embodiment, the processor that processing and control element (PCE) 104 adopts is made up of digital signal processor (DigitalSignalProcessing, DSP) and CPLD (ComplexProgrammableLogicDevice, CPLD).
Described monitoring unit 103 carries out information interaction with processing and control element (PCE) 104 by communication unit.
More specifically, in the present embodiment, described monitoring unit 103 carries out information interaction with processing and control element (PCE) 104 by RS485 serial port communicating protocol.
Wherein, the realtime curve/memory module 1033 in monitoring unit 103 carries out display and the storage of data according to the real-time digital voltage and current signal that processing and control element (PCE) 104 transmits.
In the present embodiment, when described processing and control element (PCE) 104 receives the experimental program of monitoring unit 103 transmission for producing Voltage Drop, the experiment parameter transmitted meet Voltage Drop scope that device presets and the real-time digital voltage and current signal that transmits of data acquisition unit 102 within the scope preset time, closed disconnect QF1, turn off disconnect QF2, trigger pulse generation module 1043 produces the control signal of Thyristor Controlled Reactor valve group 101 conducting, described Thyristor Controlled Reactor valve group 101 is linked in electrical network, start described Thyristor Controlled Reactor valve group, Voltage Drop is produced according to the scheme preset.
Particularly, when producing Voltage Drop, Thyristor Controlled Reactor valve group 101 is according to the scheme preset, take voltage as control objectives, after receiving the control signal producing Voltage Drop, Thyristor Controlled Reactor valve group 101 regulates the conduction angle of thyristor, Thyristor Controlled Reactor valve group 101 is operated near short circuit state, produce larger Voltage Drop, and reduce voltage according to the Voltage Drop amplitude that user is arranged, wherein, the maximum voltage of described Voltage Drop device falls the degree of depth, its Proper Match can be realized by regulating the value of reactor L2 and reactor L3, voltage can be down to 20% of former line voltage at most, when the Voltage Drop amplitude of device reaches predetermined amplitude, the voltage dip duration continuous running voltage arranged according to user falls state, after voltage dip duration completes, the conduction angle of Thyristor Controlled Reactor valve group 101 pairs of thyristors carries out ladder adjustment, within Voltage Drop release time that user is arranged, according to the standard of national grid, device voltage linear is returned to former line voltage value.
As shown in Figure 4, which show a Voltage Drop curve map produced according to the embodiment of the present invention.
Particularly, Thyristor Controlled Reactor valve group 101 to receive after experiment instruction in 70ms, by reducing the conduction angle of thyristor, voltage is down to 20% of former line voltage, after continuous service 625ms, in about 2s by voltage resume to 90% of former line voltage.
When the experimental program that described data processing control units 104 receives data monitoring unit 103 transmission is reactive-load compensation pattern, closed disconnect QF1, QF2, trigger pulse generation module 1043 produces the control signal of Thyristor Controlled Reactor valve group 101 conducting, real-time digital voltage and current signal is transferred to Thyristor Controlled Reactor valve group 101, described Thyristor Controlled Reactor valve group 101 accesses electrical network.Processing and control element (PCE) 104 calculates reactive compensation power according to real-time digital voltage and current signal, produce the control signal regulating own reactive power, trigger action block receives control signals, trigger thyristor, the lagging reactive power of regulating device, carry out tracing compensation with the capacitive reactive power of electrical network, improve the power factor (PF) of electrical network.
Although the embodiment disclosed by the present invention is as above, the embodiment that described content just adopts for the ease of understanding the present invention, and be not used to limit the present invention.Technician in any the technical field of the invention; under the prerequisite not departing from the spirit and scope disclosed by the present invention; any amendment and change can be done what implement in form and in details; but scope of patent protection of the present invention, the scope that still must define with appending claims is as the criterion.
Claims (7)
1. a voltage sag generator, is characterized in that, comprising:
Thyristor Controlled Reactor valve group, is connected on electrical network by reactor;
Data acquisition unit, gathers the real-time voltage current analog signal of electrical network, is converted into digital voltage current signal;
Processing and control element (PCE), be connected to receive with described data acquisition unit and transmit described digital voltage current signal, according to the experiment parameter preset and based on described digital voltage current signal generation for controlling the described conducting of Thyristor Controlled Reactor valve group and the control signal of closedown, wherein
When needs Voltage Drop, described processing and control element (PCE) sends the control signal of conducting to described Thyristor Controlled Reactor valve group, described Thyristor Controlled Reactor valve group is linked in electrical network, regulate the conduction angle of thyristor, realize Voltage Drop, described Thyristor Controlled Reactor valve group adopts three-phase wye connection, wherein, the neutral ground of described Thyristor Controlled Reactor valve group, realizes that voltage is single-phase, two-phase is fallen; Or described Thyristor Controlled Reactor valve group isolated neutral, realize voltage three-phase and fall.
2. voltage sag generator as claimed in claim 1, it is characterized in that, described data acquisition unit also gathers and transmits the real-time current simulating signal of described Thyristor Controlled Reactor valve group and be converted into digital current signal, described digital current signal is arranged on one end for control and is connected with described Thyristor Controlled Reactor valve group, the first disconnect that the other end is connected with electrical network, when the real-time current value of described Thyristor Controlled Reactor valve group exceedes preset range, described first disconnect disconnects, thus disconnect the connection of described Thyristor Controlled Reactor valve group and electrical network.
3. voltage sag generator as claimed in claim 2, it is characterized in that, also comprise the second disconnect, it is in parallel with described reactor, for realizing the reactive power compensation to electrical network.
4. voltage sag generator as claimed in claim 3, it is characterized in that, also comprise monitoring unit, receive the experiment parameter of user's setting and the experimental program of user's selection, and described monitoring unit is connected to receive real-time digital voltage and current signal with described processing and control element (PCE).
5. voltage sag generator as described in claim 4, it is characterized in that, the experiment parameter that described user is arranged comprises the Voltage Drop release time that Voltage Drop amplitude, voltage dip duration and Voltage Drop return to normal value, and the experimental program that described user selects comprises generation Voltage Drop pattern and reactive-load compensation pattern.
6. voltage sag generator as claimed in claim 4, it is characterized in that, described processing and control element (PCE) comprises: calculate and processing module, receive and transmit described collecting unit the real-time digital voltage and current signal transmitted and the experiment parameter of user's setting and the experimental program of user's selection that receive the transmission of described monitoring unit, the rationality of the experiment parameter that the Voltage Drop scope preset according to device is arranged described user and the experimental program that described user selects judges, produces control signal;
Trigger pulse generation module, receives the control signal of described calculating and processing module, signal is converted to the control signal controlling described Thyristor Controlled Reactor valve group conducting and closedown;
Fault detection and diagnosis module, receive the real-time digital voltage and current signal that the control signal of described trigger pulse generation module and described calculating and processing module are transmitted, when described real-time digital voltage and current signal exceeds device preset range, carry out fault diagnosis, produce trip signal, turn off described first disconnect.
7. the voltage sag generator according to any one of claim 1-6, is characterized in that, is provided with the control algolithm for line voltage linearization being returned to former line voltage in described processing and control element (PCE).
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104569692A (en) * | 2015-01-28 | 2015-04-29 | 华北电力科学研究院有限责任公司 | Power grid voltage falling generation method and device |
| CN105004951A (en) * | 2015-07-08 | 2015-10-28 | 上海南自科技股份有限公司 | Voltage drop generation device |
| CN105699809A (en) * | 2016-02-16 | 2016-06-22 | 烽火通信科技股份有限公司 | Direct current voltage drop generator |
| CN105866484A (en) * | 2016-05-25 | 2016-08-17 | 广东电网有限责任公司电力科学研究院 | Voltage sag generator as well as control method and control device of voltage sag generator |
| CN108872746B (en) * | 2018-06-27 | 2021-02-02 | 苏州浪潮智能科技有限公司 | Misjudgment prevention method and device for voltage drop test |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040005462A (en) * | 2002-07-10 | 2004-01-16 | 엘지산전 주식회사 | Apparatus for generating voltage sag and voltage swell |
| EP2146264A1 (en) * | 2007-04-11 | 2010-01-20 | Fundación CIRCE - Centro de Investigación de Recursos y Consumos Energéticos | Voltage sag generating equipment |
| ES2340746A1 (en) * | 2007-04-11 | 2010-06-08 | Fundacion Cener-Ciemat | Voltage hollow generator equipment (Machine-translation by Google Translate, not legally binding) |
| CN101887074A (en) * | 2010-05-24 | 2010-11-17 | 华北电力大学（保定） | Three-phase voltage sag generator |
| CN201637768U (en) * | 2009-12-31 | 2010-11-17 | 浙江师范大学 | Single-phase single-tube voltage sag generating device of series resonance type |
| CN202285026U (en) * | 2011-09-28 | 2012-06-27 | 杭州远方仪器有限公司 | Voltage sag generator |
| 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
- 2013-06-28 CN CN201310268995.5A patent/CN103412260B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040005462A (en) * | 2002-07-10 | 2004-01-16 | 엘지산전 주식회사 | Apparatus for generating voltage sag and voltage swell |
| EP2146264A1 (en) * | 2007-04-11 | 2010-01-20 | Fundación CIRCE - Centro de Investigación de Recursos y Consumos Energéticos | Voltage sag generating equipment |
| ES2340746A1 (en) * | 2007-04-11 | 2010-06-08 | Fundacion Cener-Ciemat | Voltage hollow generator equipment (Machine-translation by Google Translate, not legally binding) |
| CN201637768U (en) * | 2009-12-31 | 2010-11-17 | 浙江师范大学 | Single-phase single-tube voltage sag generating device of series resonance type |
| CN101887074A (en) * | 2010-05-24 | 2010-11-17 | 华北电力大学（保定） | Three-phase voltage sag generator |
| CN202285026U (en) * | 2011-09-28 | 2012-06-27 | 杭州远方仪器有限公司 | Voltage sag generator |
| 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 |
Non-Patent Citations (1)
| Title |
|---|
| 基于自耦调压器的电压暂降发生器研究;张威等;《电力电子技术》;20110331;第45卷(第3期);第88-90页 * |
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