CN109638814A - It is a kind of that high-voltage frequency converter is directly inputted using super-pressure - Google Patents
It is a kind of that high-voltage frequency converter is directly inputted using super-pressure Download PDFInfo
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- CN109638814A CN109638814A CN201811474158.7A CN201811474158A CN109638814A CN 109638814 A CN109638814 A CN 109638814A CN 201811474158 A CN201811474158 A CN 201811474158A CN 109638814 A CN109638814 A CN 109638814A
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- Prior art keywords
- frequency converter
- voltage frequency
- voltage
- phase
- shifting transformer
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
- H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
- H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
-
- 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
- Y02E40/10—Flexible AC transmission systems [FACTS]
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
- Ac-Ac Conversion (AREA)
Abstract
High-voltage frequency converter is directly inputted using super-pressure the invention discloses a kind of, including pre-charge system, phase-shifting transformer, power system and control system, high-voltage frequency converter is directly inputted in the input side of high voltage bus, the secondary side of phase-shifting transformer keeps constant with original design, pre-charge system uses the breaker and current-limiting resistance of 110kV, the control system and power system of high-voltage frequency converter remain unchanged, and the project amount changed in design is smaller, and inherit the stability of conventional high-tension Design of Inverter.The present invention uses and directly inputs high-voltage frequency converter on high voltage bus 110kV, corresponding change is done to the configurations such as phase-shifting transformer, preliminary filling electric cabinet in system, save the loss in efficiency 1-3% of intermediate transformer, improve the efficiency of entire distribution system, and improve the stability of frequency convertor system, probability of malfunction is reduced, while using high-pressure frequency-conversion inversion unit ontology precharge mode.
Description
Technical field
The present invention relates to a kind of frequency converters, and in particular to a kind of height directly inputted using super-pressure (110KV or more)
Voltage frequency changer belongs to the technical field of frequency converter.
Background technique
With the high speed development of national economy, especially petroleum pipeline, oil refining, metallurgy, military project, water conservancy, space division etc.
The development of industry, the production capacity and production scale of production constantly expand, and the application of high-voltage frequency converter product in industry is increasingly
Become universal, will be used wider and wider, power application is increasing, and current high-power high voltage frequency converter list set power reaches
100MW or more.As high voltage frequency converter power is bigger, corresponding configuration substation is needed also to use 110kV or 110kV or more voltage
Grade, to meet the requirement of conveying distance and capacity.Originally using stage variable pressure can high, system protection be complicated, makes in the presence of being lost
Moment exiting pour current is bigger when valence height, starting, impacts to power grid larger.
High-voltage frequency converter of today, it is domestic mainly to carry out input and defeated using standard voltage grades such as 3kV, 6kV, 10kV
Out, external is mainly the standard voltage grades such as 3.3kV, 6.6kV, 11kV.For middle low power frequency converter, using this voltage class
Directly input on scene influence it is smaller, sexual valence is relatively high.But for high-power or super high power high-voltage frequency converter, using 6kV,
When 10kV is directly inputted, system causes stage variable pressure unavoidably, and stage variable pressure can there is following problems: 1, can deposit after stage variable pressure
Increase in loss；2, system complex, protection complexity, cost are high；3, starting moment exiting pour current is big, impacts to power grid larger；4,
The problems such as relatively inefficient.
In conventional electrical power trans mission/distribution system, as shown in Figure 1, position of the high-voltage frequency converter in the power grid such as following figure is (with 10kV power grid
For), usual high-voltage frequency converter is mounted on 10kV grid side；It is illustrated in figure 2 high-voltage frequency converter primary system schematic diagram, high pressure
Pre-charge system, phase-shifting transformer, power system and the control system that frequency convertor system includes；As shown in figure 3, defeated for transformer
Out with the standard configuration table of frequency converter input, by multiple transformer, system effectiveness is lower, and waste of energy is more.Especially exist
In super high power project, transformer is very important due to the waste of energy of own loss.
Summary of the invention
The object of the present invention is to provide a kind of input sides of phase shifting transformer to be directly inputted using 110kV or 110kV or more
High-voltage frequency converter.
In order to reach above-mentioned technical purpose, height is directly inputted using super-pressure the technical solution of the present invention is to provide a kind of
Voltage frequency changer, including pre-charge system, phase-shifting transformer, power system and control system, which is characterized in that in phase shifting transformer
Input side directly input high-voltage frequency converter, the secondary side of phase-shifting transformer keep with it is former design it is constant.
Preferably, the input side of the phase shifting transformer directly inputs high voltage variable using the voltage of 110kV or 110kV or more
Frequency device, the secondary side of phase shifting transformer keep constant with original design, i.e., also use 1450V and 1850V voltage output, precharge system
System uses the breaker and current-limiting resistance of 110kV or 110kV or more, and the control system and power system of high-voltage frequency converter are kept not
Become, the project amount changed in design is smaller, and inherits the stability of conventional high-tension Design of Inverter.
The present invention is directly inputted using 110kV or 110kV or more voltage, to phase-shifting transformer, preliminary filling electric cabinet etc. in system
Corresponding change is done in configuration, is saved the loss in efficiency 1-3% of intermediate transformer, is improved the efficiency of entire distribution system, and
The stability for improving frequency convertor system reduces probability of malfunction, while using high-pressure frequency-conversion inversion unit ontology precharge mode,
It further decreases cost and promotes reliability；Inversion unit quantity is reduced, single set capacity is improved；Reducing current supply loss reduces use
Cost；And reduce substation's cost and the occupancy to land resource.
Detailed description of the invention
Fig. 1 is the location drawing of the high-voltage frequency converter in power grid in conventional electrical power trans mission/distribution system (by taking 10kV power grid as an example).
Fig. 2 is conventional high-voltage frequency converter primary system schematic diagram；
Fig. 3 is the standard configuration table of the transformer output and frequency converter input of high-voltage frequency converter；
Fig. 4 is provided by the invention a kind of to directly input the location drawing of the high-voltage frequency converter in power grid using super-pressure；
Fig. 5 is high-voltage frequency converter primary system schematic diagram of the invention；
Fig. 6 is pre-charging schemes after the present invention improves.
Specific embodiment
In order to make the present invention more obvious and understandable, hereby with preferred embodiment, and attached drawing is cooperated to be described in detail below.
As shown in Figures 1 to 5, for it is provided by the invention it is a kind of high-voltage frequency converter is directly inputted using super-pressure, including it is pre-
The input side of charging system, phase-shifting transformer, power system and control system, the phase-shifting transformer is directly defeated using 110kV
Enter, and the secondary side of phase-shifting transformer keeps constant with original design, i.e., also uses 1450V and 1850V voltage output, precharge system
System uses the breaker and current-limiting resistance of 110kV, and the control system and power system of high-voltage frequency converter remain unchanged, change in design
Dynamic project amount is smaller, and inherits the stability of conventional high-tension Design of Inverter.
Frequency converter high voltage power supply provided by the invention is directly derived from 110kV bus, and 110kV/35kV and 35kV/ is not used
10kV secondary transformer saves the loss in efficiency 1-3% of intermediate transformer, improves the efficiency of entire distribution system, due to
Transducer power is very big, and the electricity charge saved every year are very considerable；High reliablity.Frequency convertor system is connected directly between the side 110kV, therefore
When 35kV and 10kV failure, the failures such as frequency converter power loss will not be caused, the stability of frequency convertor system is improved, reduce number of devices
The complexity of amount and protection, also reduces probability of malfunction；
Change original high pressure precharge mode, using high-pressure frequency-conversion inversion unit ontology precharge mode, into one on reduce
Cost and promotion reliability；
Inversion unit uses 3300V, 4500V high-power IGBT, reduces inversion unit quantity, improves single set capacity；
Influence to 35kV and following voltage class is small.Frequency converter is connected directly between the side 110kV, since electrical network capacity is big,
Starting, stopping and the impact of frequency converter of frequency converter and harmonic wave will not cause impact, harmonic pollution and electricity to the side 35kV and 10kV
Pressure fluctuation, is conducive to the stabilization of 10kV system side；
Reduce the capacity and cost of 35kV and 10kV.When frequency converter is connected to the side 10kV, generally cause 35kV and
The side 10kV power supply capacity increases the total capacity of 3 times of frequency converters, will cause the side 35kV and 10kV transformer, distribution cable and copper bar etc.
Specification quite increases, and increases cost of investment, changes to 110kV after directly powering, can significantly reduce power supply cost；
Since controller switching equipment and level are relatively fewer, reduce equipment land occupation, reduce substation's cost and soil is provided
The occupancy in source.
The present invention is directly inputted using 110kV or 110kV or more voltage, to phase-shifting transformer, preliminary filling electric cabinet etc. in system
Corresponding change is done in configuration, is saved the loss in efficiency 1-3% of intermediate transformer, is improved the efficiency of entire distribution system, and
The stability for improving frequency convertor system reduces probability of malfunction, while using high-pressure frequency-conversion inversion unit ontology precharge mode,
It further decreases cost and promotes reliability；Inversion unit quantity is reduced, single set capacity is improved；Reducing current supply loss reduces use
Cost；And reduce substation's cost and the occupancy to land resource.
Claims (2)
1. a kind of directly input high-voltage frequency converter, including pre-charge system, phase-shifting transformer, power system and control using super-pressure
System processed, which is characterized in that directly input high-voltage frequency converter in the input side of phase shifting transformer, the secondary side of phase-shifting transformer is kept
It is constant with original design.
2. a kind of use super-pressure according to claim 1 directly inputs high-voltage frequency converter, which is characterized in that become mobile
The input side of depressor directly inputs high-voltage frequency converter using the voltage of 110kV or 110kV or more, and the secondary side of phase shifting transformer is protected
It holds constant with original design, i.e., also uses 1450V and 1850V voltage output, pre-charge system is using 110kV or 110kV or more
Breaker and current-limiting resistance, the control system and power system of high-voltage frequency converter remain unchanged, the project amount changed in design compared with
It is small, and inherit the stability of conventional high-tension Design of Inverter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811474158.7A CN109638814A (en) | 2018-12-04 | 2018-12-04 | It is a kind of that high-voltage frequency converter is directly inputted using super-pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811474158.7A CN109638814A (en) | 2018-12-04 | 2018-12-04 | It is a kind of that high-voltage frequency converter is directly inputted using super-pressure |
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| Publication Number | Publication Date |
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| CN109638814A true CN109638814A (en) | 2019-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811474158.7A Pending CN109638814A (en) | 2018-12-04 | 2018-12-04 | It is a kind of that high-voltage frequency converter is directly inputted using super-pressure |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102332810A (en) * | 2010-10-13 | 2012-01-25 | 深圳市库马克新技术股份有限公司 | High-voltage frequency converter precharging method and high-voltage frequency converter |
| CN103895534A (en) * | 2014-02-28 | 2014-07-02 | 株洲变流技术国家工程研究中心有限公司 | Double-current system traction power supply system based on modularized multi-level current converter |
| RU159416U1 (en) * | 2015-04-15 | 2016-02-10 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Магнитогорский государственный технический университет им. Г.И. Носова" | HIGH POWER HIGH POWER FREQUENCY CONVERTER |
-
2018
- 2018-12-04 CN CN201811474158.7A patent/CN109638814A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102332810A (en) * | 2010-10-13 | 2012-01-25 | 深圳市库马克新技术股份有限公司 | High-voltage frequency converter precharging method and high-voltage frequency converter |
| CN103895534A (en) * | 2014-02-28 | 2014-07-02 | 株洲变流技术国家工程研究中心有限公司 | Double-current system traction power supply system based on modularized multi-level current converter |
| RU159416U1 (en) * | 2015-04-15 | 2016-02-10 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Магнитогорский государственный технический университет им. Г.И. Носова" | HIGH POWER HIGH POWER FREQUENCY CONVERTER |
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