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Adaptive control method for wind driven generator set to participate in primary frequency modulation

A technology of adaptive control and wind turbines, applied in the direction of wind power generation, reduction/prevention of power oscillation, single network parallel feeding arrangement, etc., can solve problems such as offline, avoid optimization process, avoid possible failure situations, and improve adaptability sexual effect

Active Publication Date: 2019-05-07
NANJING UNIV OF TECH +1
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Problems solved by technology

If a fixed adjustment coefficient is adopted, it may cause the frequency adjustment capacity provided by the fan to exceed its maximum value and make it offline

Method used

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  • Adaptive control method for wind driven generator set to participate in primary frequency modulation
  • Adaptive control method for wind driven generator set to participate in primary frequency modulation
  • Adaptive control method for wind driven generator set to participate in primary frequency modulation

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Embodiment Construction

[0050] The present invention will be further described below in conjunction with the accompanying drawings.

[0051] Such as figure 1 As shown, an adaptive control method for wind turbines to participate in primary frequency regulation. In order to make the primary frequency regulation of the system be realized by the wind turbine and the original conventional unit of the system, it is necessary to add inertia control and droop control to the wind turbine control module so that the wind turbine has the same characteristics as the conventional one. Similar inertia support and frequency regulation performance of the unit. The parameters of the primary frequency modulation control module of the fan mainly include the virtual inertia constant K 1 and unit regulation power K 2 , is usually set as a constant, and it is difficult to reasonably set its value.

[0052] Aiming at the randomness and fluctuation of wind speed, the adaptive virtual inertia parameter K 1,t The dynamic e...

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Abstract

The invention discloses an adaptive control method for a wind driven generator set to participate in primary frequency modulation. The method comprises firstly, deriving the dynamic expression of a wind driven generator adaptive virtual inertia parameter K1,t in combination with the characteristics of the wind driven generator and the current rotational kinetic energy of the wind driven generator;further determining a wind driven generator adaptive unit adjustment power K2,t in combination with the current output level and the current load shedding level of the wind driven generator; finally,giving the structure of a wind driven generator primary frequency modulation control module in combination with the wind driven generator adaptive virtual inertia parameter K1,t and the wind driven generator adaptive unit adjustment power K2,t, and realizing an adaptive virtual inertia control and adaptive droop control function. The method not only can reasonably and effectively utilize the primary frequency modulation capability actually provided by the wind driven generator, but also can improve the adaptability of the wind driven generator to the large disturbance scene and avoid possiblefault conditions.

Description

technical field [0001] The invention relates to an adaptive control method for wind turbines participating in primary frequency modulation, and belongs to the technical field of primary frequency modulation of wind turbines at variable wind speeds. Background technique [0002] At present, most of the fans used are not equipped with governors, and their speed is decoupled from the system frequency. Therefore, when the system frequency changes, the fans can neither change the prime mover output to participate in system frequency regulation like conventional units, nor can they pass Changing its own rotational kinetic energy to temporarily suppress system frequency changes will undoubtedly affect system frequency security. [0003] This situation is exacerbated as wind power penetration increases. As a clean energy, wind energy has been paid more and more attention. It will become a hot research problem to make the fan have the similar frequency regulation ability as the con...

Claims

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Application Information

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IPC IPC(8): H02J3/24H02J3/38H02J3/48
CPCY02E10/76
Inventor 郝丽丽吉静王辉李威王昊昊孙菲力谢东亮
Owner NANJING UNIV OF TECH
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