Research on Control Strategy of Wind Farm Over-Speed and Load Shedding Considering Fatigue Distribution

doi:10.16628/j.cnki.2095-8188.2022.09.006

Abstract

Abstract:

In order to reduce the impact of large-scale wind power grid connection on the frequency stability of power system, a certain amount of active power for backup are reserved in the wind farm.An active power distribution method of wind farm over-speed and load shedding considering fatigue distribution is proposed.The load shedding coefficients of different units are adjusted to keep a certain standby capacity and improve the fatigue growth distribution of units.Combined with the over-speed control operation state of the unit,the fatigue coefficient of the wind turbine unit is improved.With the objective of minimizing the standard deviation,the fatigue coefficient of the wind farm is improved.With the constraint of tracking the active power reference value and the output limit of the unit,the power reference value and the load reduction coefficient of the allocated unit are calculated by particle swarm optimization algorithm.The effectiveness of the proposed method is verified by comparing the distribution of fatigue coefficient,cumulative rain flow cycle and damage equivalent load of components under different strategies.

Key words: wind farm, load optimization, power distribution, overs-peed control

CLC Number:

TM614

LIU Yingming, XUE Fan, WANG Xiaodong, LI Dan, LI Yang. Research on Control Strategy of Wind Farm Over-Speed and Load Shedding Considering Fatigue Distribution[J]. LOW VOLTAGE APPARATUS, 2022, 0(9): 38-44.

Figures/Tables 12

References 15

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参数	数值
切入风速/(m·s^-1)	3
切出风速/(m·s^-1)	25
额定风速/(m·s^-1)	11.4
叶片半径/m	63
额定功率/MW	5
额定转速/rpm	12.1
切入转速/rpm	6.9
发电机滤波时间常数	0.2
齿轮箱传动比	97

策略	疲劳系数标准差	百分比/%	最大疲劳系数
策略A	0.044 2	—	0.210 4
策略B	0.025 3	-42.8	0.130 6

转轴损伤等效载荷标准差		百分比/%
策略A	策略B	百分比/%
1.5101e+05	5.5754e+04	-63.08