Wind power plant grid connection method and system for realizing rapid power control function

A power control and functional technology, applied in wind power generation, reducing/preventing power oscillation, electrical components, etc., can solve problems such as insufficient ride-through capability, power disturbance, and volatility of new energy power generation, so as to improve ride-through capability and reduce system voltage fluctuating effect

Pending Publication Date: 2022-04-22
HUANENG XINTAI WIND POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The overvoltage or low voltage (or frequency) of existing wind farm new energy units leads to insufficient ride-through capability: when a single fault occurs in the power grid, a large number of off-grids are caused by overvoltage or insufficient low-voltage ride-through capability, causing serious power disturbances and intermittent new energy power generation. and volatility, resulting in more frequent and larger changes in power grid power flow, and causing serious voltage fluctuations

Method used

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  • Wind power plant grid connection method and system for realizing rapid power control function
  • Wind power plant grid connection method and system for realizing rapid power control function
  • Wind power plant grid connection method and system for realizing rapid power control function

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Embodiment 1

[0034] refer to figure 1 , as an embodiment of the present invention, provides a wind farm grid-connected method for realizing fast power control function, including:

[0035] S1: collect the current information and voltage information of the grid-connected point through the acquisition module 100, and calculate the line power information according to the current information and voltage information; collect the current information and voltage information of the grid-connected point of the wind turbine through the acquisition module 100.

[0036] S2: the line power information is input into the control module 200, and the grid-connected point frequency dead zone threshold is set in the control module 200, and the control module 200 compares the line power information with the grid-connected point frequency dead zone threshold;

[0037] When the change rate of the line power information is greater than the frequency dead zone threshold of the grid connection point, and the activ...

Embodiment 2

[0054] refer to figure 2 , is another embodiment of the present invention. This embodiment is different from the first embodiment in that it provides a wind farm grid-connected method and system for realizing fast power control function. In order to improve the effect adopted in this method and system Verification shows that this embodiment adopts the traditional scheme to conduct a comparative test with the method and system of the present invention, and compares the test results by means of scientific demonstration to verify the real effect of the method and system.

[0055] At present, when power control is performed, the total number of wind turbines installed with the total power is generally used to calculate the average distribution of each wind turbine, and the output power reference value of the wind farm is evenly distributed to each wind turbine in the wind farm. The reference power is the total reference power of the wind farm divided by the total number of wind t...

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Abstract

The invention discloses a wind power plant grid connection method for realizing a rapid power control function, which is characterized by comprising the following steps of: acquiring current information and voltage information of a grid connection point through an acquisition module, and calculating line power information according to the current information and the voltage information; inputting the line power information into a control module, setting a grid-connected point frequency dead zone threshold in the control module, and comparing the line power information with the grid-connected point frequency dead zone threshold by the control module; the over-voltage or low-voltage (or frequency) ride-through capability of each wind turbine generator set can be improved, severe power disturbance is not formed when a single fault occurs, system voltage fluctuation is reduced, system voltage smooth adjustment is achieved, the configuration control module receives instructions of a large power grid stability control system and a reactive power control system, the functions of primary frequency modulation and rapid voltage regulation are achieved, and the system is stable and reliable. Continuous and smooth adjustment of active power can be realized by participating in primary frequency modulation of a power grid system.

Description

technical field [0001] The invention relates to the field of grid-connected regulation of wind power generating sets, in particular to a method and system for grid-connecting a wind farm to realize a fast power control function. Background technique [0002] In recent years, with the rapid development of global wind power, the penetration rate of wind power in power grids in some areas of my country has exceeded 20%. The inherent randomness, intermittency and volatility of wind power make large-capacity wind farms have adverse effects on the dynamic stability of the power grid, frequency regulation and voltage regulation. The control and grid-connected principle of wind power lead to the decoupling of its mechanical power and electromagnetic power, and the decoupling of its rotational speed and grid frequency, thus losing the fast and effective response to the grid frequency, so that the "implicit inertia" in the rotational kinetic energy has a great influence on the inertia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/24H02J3/38H02J3/48H02J3/12H02J3/50
CPCH02J3/241H02J3/381H02J3/48H02J3/12H02J3/50H02J2300/28Y02E10/76
Inventor 白博李新褚洪建公维珂
Owner HUANENG XINTAI WIND POWER CO LTD
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