Voltage Control Method for Common Connection Point of Offshore Wind Farm Based on Cloud Edge Collaborative Architecture

doi:10.11985/2023.01.019

Abstract

Abstract:

Aiming at the voltage fluctuation of common connection point caused by the reactive power output fluctuation of a large number of wind turbines in a large number of wind farms, a distributed voltage control method based on cloud edge collaborative architecture is proposed. Firstly, in the cloud side collaborative architecture, several wind turbines are divided into clusters, and edge computing devices are configured in each cluster. The right cloud controller regulates and controls the edge computing devices uniformly. Then, in the cloud control center, the optimal set value of H∞ effect of reference reactive power output on voltage fluctuation is derived by constructing Lyapunov functional, and the reference reactive power output of each wind turbine cluster is generated. Finally, on the edge side, the distributed cooperative control strategy based on consensus algorithm is used to realize the real-time power control of the underlying wind turbines. The simulation results of wind farm based on Simulink show that the overshoot of the proposed method is about 38%, the response speed is longer and the control performance is better than that of the traditional centralized control method and the fully decentralized consistent control method.

Key words: Offshore wind farm, common connection point, voltage control, cloud side coordination, consensus algorithm, Lyapunov functional, reference reactive power output

CLC Number:

TM614

ZHOU Weibo, HUANG Wei. Voltage Control Method for Common Connection Point of Offshore Wind Farm Based on Cloud Edge Collaborative Architecture[J]. Journal of Electrical Engineering, 2023, 18(1): 169-180.

Figures/Tables 15

References 30

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参数		数值
各层的采样时间/s	终端本地控制器	1×10^-4
	边缘侧控制器	0.15
	云端控制器	0.55
网络参数	系统频率/Hz	60
	变换器	6 kV/35 kV
	线路电阻/(Ω/km)	0.105
	线路电感/(mH/km)	0.068
	衰减系数	27

方案	评价指标
方案	超调量(%)	峰值时间/s	恢复时间/s
文献[7]	39.08	10	37
文献[8]	36.64	12	31
所提方法	37.51	4	23

方案	评价指标
方案	超调量(%)	峰值时间/s	恢复时间/s
文献[11]	51.99	237	359
文献[13]	48.25	193	332
所提方法	38.76	168	215

方案	评价指标
方案	超调量(%)	峰值时间/s	恢复时间/s
文献[11]	45.01	42	89
文献[13]	42.36	38	74
所提方法	37.99	25	62