基于背靠背变流器的风电系统仿真对比研究

doi:10.16180/j.cnki.issn1007-7820.2022.02.011

Abstract

Abstract:

The detailed model of the back-to-back converter of the permanent magnet direct drive wind power system contains multiple power electronic devices, and the use of pulse width modulation technology will inevitably increase the mathematical calculation of the simulation system. In view of the problem, a mean value model is proposed to simplify the system so that the wind power system can operate quickly and stably. For the converter mean value model, the controlled power supply is used to replace the converter in structure, and its higher harmonics are ignored in principle, and only the fundamental wave component is retained. In addition, from the perspective of system control, the control strategy of the system is improved by removing the PWM modulation process. Finally, a permanent magnet direct drive wind power system simulation model is built in MATLAB/Simulink, and the system response of the mean model and the detailed model are compared. The simulation results show that the mean value model can not only meet the system accuracy requirements, but also speed up the system simulation speed, greatly improve the system stability, which verifies the rationality of the control strategy.

Key words: permanent magnet synchronous generator, back-to-back converter, detailed model, mean value model, wind power, control strategy, MATLAB simulation, PWM

CLC Number:

TP273

LIU Jianlong,HAO Zhenghang. Comparative Study of Wind Power System Simulation Based on Back-to-Back Converters[J].Electronic Science and Technology, 2022, 35(2): 67-73.

Figures/Tables 15

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风力机参数	数值	PMSG参数	数值
额定功率/W	2.5×10⁵	额定功率/W	2.25×10⁵
输出功率/W	2.25×10⁵	额定频率/Hz	50
额定风速/m·s^-1	11	定子电阻/Ω	0.01
最大功率/pu	1	电枢电感/H	8.35×10^-4
最大转速/pu	1	转子磁链/Wb	9.727
桨距角/deg	0	磁极对数	48

模型	步长10 μs	步长50 μs	步长100 μs	步长250 μs
详细模型	574.95	163.98	-	-
均值模型	521.41	121.10	70.09	57.88

Comparative Study of Wind Power System Simulation Based on Back-to-Back Converters

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