CN201323471Y - Voltage quality comprehensive adjusting device with differentiation configuration structure - Google Patents
Voltage quality comprehensive adjusting device with differentiation configuration structure Download PDFInfo
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- CN201323471Y CN201323471Y CNU2008201240873U CN200820124087U CN201323471Y CN 201323471 Y CN201323471 Y CN 201323471Y CN U2008201240873 U CNU2008201240873 U CN U2008201240873U CN 200820124087 U CN200820124087 U CN 200820124087U CN 201323471 Y CN201323471 Y CN 201323471Y
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- 230000004069 differentiation Effects 0.000 title claims abstract description 14
- 238000004146 energy storage Methods 0.000 claims description 20
- 238000011217 control strategy Methods 0.000 claims description 8
- 238000005516 engineering process Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
Abstract
The utility model provides a novel voltage quality comprehensive adjusting device. The voltage compensation of the device which adopts a differentiation configuration structure comprises a high-frequency compensation part and a low-frequency compensation part, wherein, the high-frequency compensation part solves the high-frequency voltage quality problems like voltage harmonic and the like, and meanwhile, the low-frequency compensation part solves the lower relative frequency voltage quality problems of voltage sag, fluctuation and flickering, three-phase unbalancedness and the like. Therefore, the device can solve the low-frequency voltage quality problems like voltage sag treatment and the like, realizes the voltage harmonic treatment, and effectively reduces the switch loss of a current transformer, and achieves the economical operation of the device at the same time.
Description
Technical field
The utility model relates to field of information security technology, is specifically related to a kind of quality of voltage comprehensive adjustment device with differentiation configuration.
Background technology
Along with development of modern science and technology, increasing industrial processes and streamline (as semiconductor manufacturing, computer integrated manufacturing system, paper-making industry etc.) depend on to the quality of power supply (especially quality of voltage) very responsive be the equipment of core with the microprocessor chip, these equipment are very high to the requirement of quality of voltage, all will influence these equipment operate as normal even for example several periodic voltage falls temporarily.Guarantee that the high-quality supply power voltage just must administer the voltage harmonic of electrical network, reduce wave distortion, eliminate the asymmetric etc. of voltage fluctuation and flickering, each phase voltage.Though dynamic electric voltage recovery device (DVR) has been arranged at present, solid-state quick diverter switch (SSTS), exemplary voltages quality controlling devices such as uninterrupted power supply (ups) Unity, but these controlling device function singlenesses, in order to reduce investment and floor space, quality of voltage comprehensive adjustment device becomes the development trend of quality of voltage controlling device.
The main circuit topological structure of at present big capacity quality of voltage comprehensive treatment device adopts cascade, many level and multiple technology to improve the capacity of device, but can not well solve the problem that the multiple function of quality of voltage comprehensive treatment device is coordinated mutually.For example, relatively low for the quality of voltage problem that relative frequencies such as voltage dip, fluctuation and flickering, three-phase imbalance are lower to the switching frequency requirement of power device (power device among the application is meant full-controlled switch devices such as IGBT, IGCT), and the relative higher voltage quality problems of voltage harmonic equifrequent having relatively high expectations to the power device switching frequency, function for the comprehensive regulation of satisfying device, improve the switching frequency of all power devices, greatly increased the switching loss of equipment, increase the weight of the burden of cooling device, strengthened the cost of equipment; High switching frequency, jumbo power device are difficult to type selecting simultaneously.In the actual electric network, high frequency quality of voltage problem capacity such as voltage harmonic are less relatively, and the lower quality of voltage problem capacity of relative frequencies such as voltage dip, fluctuation and flickering, three-phase imbalance is bigger, at this situation, the application proposes a kind of method of carrying out the configuration of converter differentiation according to the difference in functionality modular character.Based on the thought of high frequency voltage quality problems and low-frequency voltage quality problems decoupling compensation, in quality of voltage is administered, adopt the high frequency compensation part not see identical or similar techniques at home and abroad as yet with the topological structure of low-frequency compensation part differentiation configuration.
The utility model content
The utility model provides a kind of quality of voltage comprehensive adjustment device with differentiation configuration, this adjusting device is divided into high frequency compensation part and low-frequency compensation part by function with module, described high frequency compensation part is connected with three-phase alternating-current supply, and described low-frequency compensation part is connected with load.
This device adopts chain structure, by the module cascade, is serially connected with in the supply line, and adjusting device is divided into high frequency compensation part and low-frequency compensation part by function with module,
Described high frequency compensation partly comprises one or more high-frequency models, each module comprises energy storage section, converter and high frequency filter, energy storage section supports for converter provides direct voltage, converter is according to the control strategy bucking-out system voltage high-frequency harmonic of controller, and high frequency filter is considered the characteristic of switch frequency harmonics of removing converter;
Described low-frequency compensation partly comprises the low frequency module of a plurality of series connection, each module is made up of energy storage section, converter and filter, energy storage section supports for converter provides direct voltage, converter is according to the lower quality of voltage of control strategy bucking-out system frequency of controller, and filter is considered the characteristic of switch frequency harmonics of removing converter.
The advantage of this patent:
1) device can be realized the function that voltage dip, liter, three-phase imbalance and voltage fluctuation and flicker compensation temporarily and voltage harmonic are administered simultaneously;
2) to the decoupling zero control of harmonic voltage and voltage adjustment and the differentiation configuration of converter the device overall losses is reduced greatly; Reduce device outlet Design of Filter difficulty.
Description of drawings
Fig. 1 is the main circuit structure schematic diagram that has the quality of voltage comprehensive adjustment device of differentiation configuration according to of the present utility model, wherein:
1: three-phase alternating-current supply;
2:A phase high frequency compensation module;
3:A phase low-frequency compensation module;
4:B installs mutually, comprises 2,3 same structures;
5:C installs mutually, comprises 2,3 same structures;
6: the current transformer energy storage section
L1, C1: high-frequency model output filter;
L2, C2: low frequency module output filter;
La, Lb, 2Lc: system a, b, c three pole reactor;
Embodiment
The method of coupling compensation, adopt the topological structure of high frequency compensation part and the configuration of low-frequency compensation part differentiation, the high frequency compensation part is just divided the work according to frequency with the low-frequency compensation part, low-frequency compensation partly is responsible for the low-frequency voltage quality problems that compensation comprises low order voltage harmonic, voltage dip and voltage fluctuation and flicker, three-phase imbalance, high frequency compensation partly is responsible for compensation high order voltage harmonic, can determine according to the switching frequency of compensation capacity and device for the concrete division of labor of harmonic wave control.
This device adopts chain structure, by the module cascade, is serially connected with in the supply line, and adjusting device is divided into high frequency compensation part and low-frequency compensation part by function with module,
Described high frequency compensation partly comprises one or more high-frequency models, each module comprises energy storage section, converter and high frequency filter, energy storage section supports for converter provides direct voltage, converter is according to the control strategy bucking-out system voltage high-frequency harmonic of controller, and high frequency filter is considered the characteristic of switch frequency harmonics of removing converter;
Described low-frequency compensation partly comprises the low frequency module of a plurality of series connection, each module is made up of energy storage section, converter and filter, energy storage section supports for converter provides direct voltage, converter is according to the lower quality of voltage of control strategy bucking-out system frequency of controller, and filter is considered the characteristic of switch frequency harmonics of removing converter.
The advantage of this patent:
1) device can be realized the function that voltage dip, liter, three-phase imbalance and voltage fluctuation and flicker compensation temporarily and voltage harmonic are administered simultaneously;
2) to the decoupling zero control of harmonic voltage and voltage adjustment and the differentiation configuration of converter the device overall losses is reduced greatly; Reduce device outlet Design of Filter difficulty.
Description of drawings
Fig. 1 is the main circuit structure schematic diagram that has the quality of voltage comprehensive adjustment device of differentiation configuration according to of the present utility model, wherein:
1: three-phase alternating-current supply;
2:A phase high frequency compensation module;
3:A phase low-frequency compensation module;
4:B installs mutually, comprises 1,2 same structure;
5:C installs mutually, comprises 1,2 same structure;
6: the current transformer energy storage section
L1, C1: high-frequency model output filter;
L2, C2: low frequency module output filter;
La, Lb, 2Lc: system a, b, c three pole reactor;
Embodiment
Adopt chain structure according to the quality of voltage comprehensive adjustment device with differentiation configuration of the present utility model, by the module cascade, be serially connected with in the supply line, device is divided into high frequency compensation part and low-frequency compensation part two classes by function with module.Figure 1 shows that the device main circuit structure figure that the application introduces.
(1) high frequency compensation part:
The high frequency compensation part is made up of one or more high-frequency models usually, and each module is made up of energy storage section, converter and high frequency filter.Energy storage section supports for converter provides direct voltage; Converter is according to the control strategy bucking-out system voltage high-frequency harmonic of controller; High frequency filter is considered the characteristic of switch frequency harmonics of removing converter.
With 25 voltage harmonics in the system is example, and its frequency is:
f
25＝25*50＝1250Hz
In order well to follow the tracks of compensation 25 subharmonic, the switching frequency of the power device of voltage compensating device is:
f
K≥10*f
25＝10*1250＝12.5kHz
Therefore the bucking voltage high-frequency harmonic requires very high to the switching frequency of power device.
And in the system, the content of voltage harmonic generally can not surpass 8%, even lower.Therefore be example with the 10kV system: single-phase harmonic content:
U
fTotal effective value of representing all voltage harmonics.
The energy storage section dc voltage value:
K represents redundant coefficient;
U
FmaxExpression harmonic voltage peak value;
Only this shows to compensate that the element with small capacity that power device is only chosen about 1200V gets final product, avoided the jumbo requirement of high frequency power device at voltage harmonic.
(2) low-frequency compensation part:
The low-frequency compensation part is composed in series by a plurality of low frequency modules usually, and each module is made up of energy storage section, converter and filter.Energy storage section supports for converter provides direct voltage; The quality of voltage problem that converter is lower according to the control strategy bucking-out system frequency of controller; Filter is considered the characteristic of switch frequency harmonics of removing converter.
With fundamental voltage in the system is example, and its frequency is:
f
0＝50Hz
Unusual in order well to follow the tracks of the compensation fundamental voltage, the switching frequency of the power device of voltage compensating device is:
f
K≥10*f
0＝10*50＝500Hz
Therefore compensating fundamental voltage requires lower to the switching frequency of power device.
And in the system, voltage dip, temporarily liter, fluctuation and fundamental voltages such as flickering, three-phase imbalance unusually, the voltage magnitude excursion is very big, is example with the voltage dip: most voltage dip amplitudes are 20～30%, even higher.Therefore be example with the 10kV system: the temporary range of decrease value of single-phase voltage is:
U
sTotal effective value of representing all voltage dips.
The energy storage section dc voltage value:
K represents redundant coefficient;
U
0maxExpression voltage dip peak value;
This shows at fundamental voltage and compensate, in order to reduce the quantity of series connection power model, the corresponding raising of the voltage of power device and capacity, and the low switching frequency of low-frequency voltage quality problems such as voltage dip compensation requirement,, avoided the requirement of the high switching frequency of high-capacity power device.
To sum up analyze, device is based on the thought of high frequency voltage quality problems and low-frequency voltage quality problems decoupling compensation, adopt the topological structure of high frequency compensation part and the configuration of low-frequency compensation part differentiation, its control method is: according to the characteristics that this device carries out the differentiation configuration according to functional characteristic, the high frequency compensation part is just divided the work according to frequency with the low-frequency compensation part.Total principle is that low-frequency compensation partly is responsible for compensation low order voltage harmonic, voltage dip and low-frequency voltage quality problems such as voltage fluctuation and flicker, three-phase imbalance; High frequency compensation partly is responsible for compensation high order voltage harmonic; The concrete division of labor for harmonic wave control can be decided according to the switching frequency of compensation capacity and device.
Content owing to high order voltage harmonic in the system is lower like this, the high frequency compensation part is partly compared with low-frequency compensation and can be chosen littler capacity, dc voltage can reduce, also just provide bigger leeway for the type selecting of switching device, switching frequency can improve greatly, can realize the improvement of high order voltage harmonic fully, the device loss also can be controlled in allowed limits.Low-frequency compensation partly realizes compensating low order voltage harmonic, voltage dip and functions such as voltage fluctuation and flicker, three-phase imbalance, is equivalent to a dynamic electric voltage recovery device that function is very powerful.
The utility model has been described according to preferred embodiment.Obviously, reading and understanding above-mentioned detailed description postscript and can make multiple correction and replacement.What the utility model was intended to is that the application is built into all these corrections and the replacement that has comprised within the scope that falls into the appended claims or its equivalent.
Claims (2)
1, a kind of quality of voltage comprehensive adjustment device with differentiation configuration, it is characterized in that: this adjusting device is divided into high frequency compensation part and low-frequency compensation part by function with module, described high frequency compensation part is connected with three-phase alternating-current supply, and described low-frequency compensation part is connected with load.
2, device as claimed in claim 1 is characterized in that this device adopts chain structure, by the module cascade, is serially connected with in the supply line, and adjusting device is divided into high frequency compensation part and low-frequency compensation part by function with module,
Described high frequency compensation partly comprises one or more high-frequency models, each module comprises energy storage section, converter and high frequency filter, energy storage section supports for converter provides direct voltage, converter is according to the control strategy bucking-out system voltage high-frequency harmonic of controller, and high frequency filter is considered the characteristic of switch frequency harmonics of removing converter;
Described low-frequency compensation partly comprises the low frequency module of a plurality of series connection, each module is made up of energy storage section, converter and filter, energy storage section supports for converter provides direct voltage, converter is according to the lower quality of voltage of control strategy bucking-out system frequency of controller, and filter is considered the characteristic of switch frequency harmonics of removing converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201240873U CN201323471Y (en) | 2008-12-03 | 2008-12-03 | Voltage quality comprehensive adjusting device with differentiation configuration structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201240873U CN201323471Y (en) | 2008-12-03 | 2008-12-03 | Voltage quality comprehensive adjusting device with differentiation configuration structure |
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| Publication Number | Publication Date |
|---|---|
| CN201323471Y true CN201323471Y (en) | 2009-10-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201240873U Expired - Lifetime CN201323471Y (en) | 2008-12-03 | 2008-12-03 | Voltage quality comprehensive adjusting device with differentiation configuration structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102394499A (en) * | 2011-11-03 | 2012-03-28 | 东南大学 | Multi-machine graded type complete active control device for low-voltage heavy-current harmonic waves |
| WO2015120568A1 (en) * | 2014-02-12 | 2015-08-20 | 陈峻岭 | Method for differentially controlling chained active power filter |
| CN104935183A (en) * | 2015-06-25 | 2015-09-23 | 西安工程大学 | Voltage transient variation compensation circuit charged by three-phase three-line transformerless phase voltage |
-
2008
- 2008-12-03 CN CNU2008201240873U patent/CN201323471Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102394499A (en) * | 2011-11-03 | 2012-03-28 | 东南大学 | Multi-machine graded type complete active control device for low-voltage heavy-current harmonic waves |
| CN102394499B (en) * | 2011-11-03 | 2014-08-27 | 东南大学 | Multi-machine graded type complete active control device for low-voltage heavy-current harmonic waves |
| WO2015120568A1 (en) * | 2014-02-12 | 2015-08-20 | 陈峻岭 | Method for differentially controlling chained active power filter |
| GB2539330A (en) * | 2014-02-12 | 2016-12-14 | Chen Junling | Method for differentially controlling chained active power filter |
| CN104935183A (en) * | 2015-06-25 | 2015-09-23 | 西安工程大学 | Voltage transient variation compensation circuit charged by three-phase three-line transformerless phase voltage |
| CN104935183B (en) * | 2015-06-25 | 2017-11-10 | 西安工程大学 | The voltage transient variation compensation circuit of phase three-wire three transless phase voltage charging |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: CHINA ELECTRIC PRIME TECHNOLOGY CO., LTD. STATE EL Free format text: FORMER OWNER: CHINA ELECTRIC PRIME TECHNOLOGY CO., LTD. Effective date: 20130220 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zhao Guoliang Inventor after: Deng Zhanfeng Inventor after: Zhao Xiaoying Inventor after: Zhao Ruibin Inventor after: Ye Fuhua Inventor after: Zhou Fei Inventor after: Liang Liping Inventor after: Gao Zhongsheng Inventor before: Zhao Guoliang Inventor before: Deng Zhanfeng Inventor before: Zhao Xiaoying Inventor before: Zhao Ruibin Inventor before: Ye Fuhua Inventor before: Zhou Fei |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: ZHAO GUOLIANG DENG ZHANFENG ZHAO XIAOYING ZHAO RUIBIN YE FUHUA ZHOU FEI TO: ZHAO GUOLIANG DENG ZHANFENG ZHAO XIAOYING ZHAO RUIBIN YE FUHUA ZHOU FEI LIANG LIPING GAO ZHONGSHENG |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20130220 Address after: 100192 Beijing city Haidian District Qinghe small Camp Road No. 15 China Electric Power Research Institute of the Ministry of science and technology Patentee after: China Electric Power Research Institute Patentee after: China Electric Prime Technology Co., Ltd. Patentee after: State Grid Corporation of China Patentee after: Jigang Group Ltd. Address before: 100192 Beijing city Haidian District Qinghe small Camp Road No. 15 China Electric Power Research Institute of the Ministry of science and technology Patentee before: China Electric Power Research Institute Patentee before: China Electric Prime Technology Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20091007 |
|
| CX01 | Expiry of patent term |