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Wide area fast voltage controller of wind turbine generator and control method

A voltage controller and wind turbine technology, applied in wind power generation, AC network voltage adjustment, electrical components, etc., can solve problems such as system voltage drop or rise, influence on safe operation of power grid, and commutation failure of converter station, etc. Small, improve reactive power output, achieve convenient effect

Active Publication Date: 2019-02-26
CHINA ELECTRIC POWER RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the commutation failure problem of LCC-HVDC, and due to the long distance of DC transmission and the relatively wide area spanning, the sending end is mainly equipped with new energy sources, and the unstable voltage regulation performance of new energy sources causes commutation failures in converter stations and DC faults Occasionally, the system voltage will drop or rise, which will have a great impact on the safe operation of the power grid

Method used

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  • Wide area fast voltage controller of wind turbine generator and control method
  • Wide area fast voltage controller of wind turbine generator and control method
  • Wide area fast voltage controller of wind turbine generator and control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] The present invention provides a wide-area fast voltage controller for wind turbines, such as figure 1 As shown, it includes: voltage deviation calculation link, first dead zone link 6, first limiting link 7, first PI link 8, reactive power deviation calculation link, second dead zone link 13, and second limiting link 14 , the second PI link 15, the first selection switch 9 and the lead-lag link 10;

[0063] The voltage deviation calculation link, the first dead zone link 6, the first limiting link 7, and the first PI link 8 are sequentially connected;

[0064] The reactive power deviation calculation link, the second dead zone link 13, the second limiting link 14 and the second PI link 15 are sequentially connected;

[0065] The first input end of the first selection switch 9 is connected to the first PI link 8;

[0066] The second input end of the first selection switch 9 is connected to the second PI link 15;

[0067] The output terminal of the first selection swi...

Embodiment 2

[0095] When the first input terminal of the second selection switch 3 is closed and the first input terminal of the first selection switch 9 is closed, the grid connection point voltage V of the wind farm reg Through the first filtering link 4, the second adder 5, the first dead zone link 6, the first limiting link 7, the first PI link 8, the first selection switch 9 and the lead-lag link 10, the reactive power adjustment Quantity instruction Q ord , wherein, the input of the second adder 5 includes the grid-connected point voltage reference value V POI_ref ;

[0096] When the second input end of the second selection switch 3 is closed and the first input end of the first selection switch 9 is closed, the reactive power Q of the grid-connected point of the wind farm flowing into the new energy collection station branch After sequentially passing through the amplifier 1, the first adder 2, the second selection switch 3, the first filter link 4, the second adder 5, the first d...

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Abstract

The invention relates to a wide area fast voltage controller of a wind turbine generator and a control method. The controller comprises a voltage deviation calculation section, a first dead zone section, a first amplitude limiting section, a first PI section, a reactive power deviation calculation section, a second dead zone section, a second amplitude limiting section, a second PI section, a first selection switch and a leading lag section. The voltage deviation calculation section, the first dead zone section, the first amplitude limiting section and the first PI section are sequentially connected. The reactive power deviation calculation section, the second dead zone section, the second amplitude limiting section and the second PI section are sequentially connected. The first input terminal of the first selection switch is connected with the first PI link. The second input terminal of the first selection switch is connected with the second PI link. The output terminal of the first selection switch is connected with the leading lag section. The technical scheme provided by the invention can improve the reactive power output of a wind turbine generator and rapidly suppress voltagesudden rises and sags.

Description

technical field [0001] The invention relates to the technical field of electric power system control, in particular to a wide-area fast voltage controller and a control method for wind turbines. Background technique [0002] With its advantages of mature technology, low cost and large-scale development and utilization, wind power has become the fastest-growing and most competitive power generation technology in new energy. According to the "2017 Global Renewable Energy Status Report" (Renewables 2017 Global Status Report), the new capacity of renewable energy power reached a new high in 2016, reaching 161 gigawatts (GW), and the global cumulative installed capacity was nearly 2017GW, an increase of about 9%, of which wind power accounted for 34% of the annual new power capacity. Wind power accounted for only 6% of renewable energy generation in 2004, progressing to 24.1% by 2016. In 2016, the annual growth of global wind farms was 15.6%, and the power generation was 959.5T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/16H02J3/38
CPCH02J3/386H02J3/16Y02E10/76Y02E40/30
Inventor 张健李文锋卜广全何凤军阎应飞侯俊贤丁平
Owner CHINA ELECTRIC POWER RES INST