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大型双馈风电机组电网故障穿越过程载荷特性分析
作者:
作者单位:

1.浙江运达风电股份有限公司,浙江省杭州市 310012;2.浙江省风力发电技术重点实验室,浙江省杭州市 310012

作者简介:

通讯作者:

基金项目:

国家重点研发计划资助项目(2018YFB0904000)。


Load Characteristic Analysis of Grid Fault Ride-through Process for DFIG Based Wind Turbine
Author:
Affiliation:

1.Zhejiang Windey Co., Ltd., Hangzhou 310012, China;2.Zhejiang Key Laboratory of Wind Power Technology, Hangzhou 310012, China

Fund Project:

This work is supported by National Key R&D Program of China (No. 2018YFB0904000).

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    摘要:

    针对大型双馈风电机组电网故障穿越过程载荷特性研究不足的问题,首先,基于弹簧-阻尼-质量建模方法,建立了双馈风电机组传动链轴系载荷响应模型及塔架左右方向运动响应模型,获得系统固有谐振频率及阻尼系数解析表达式,理论分析结果表明,电网故障穿越过程可能引起传动链扭振和塔架左右晃动问题。其次,建立GH Bladed-MATLAB联合仿真模型,并基于此研究了电网对称与不对称故障对传动链轴系及塔架左右载荷特性的影响,仿真结果验证了理论分析的正确性。最后,进一步研究了不同有功恢复策略对机组载荷的影响,结果表明,有功功率恢复速率过快会导致机组载荷大幅增加,并得出了“机械友好型”风电机组故障电压穿越控制原则。

    Abstract:

    Studies are conducted aiming at the problem of insufficient research on the load characteristics of grid fault ride-through of doubly-fed induction generator (DFIG) based wind turbines. Firstly, based on the spring-damping-quality modeling method, a response model of DFIG based wind turbines for the load of drive train shafting and the side-to-side vibration of tower is established, and then the analytical expressions of the system natural resonance frequency and damping coefficient are obtained. The theoretical analysis results show that the grid fault ride-through process may cause torsional vibration of the drive train and the side-to-side vibration of tower. Secondly, a co-simulation model of GH Bladed and MATLAB is established, and the effects of symmetrical and asymmetrical grid fault ride-through process on load characteristics of the drive train shafting and tower based on the co-simulation model are studied. Simulation results verify the correctness of the theoretical analysis. Finally, the influence of different active power recovery strategies on the load of wind turbines is further analyzed. The research results show that the over-fast active power recovery rate will significantly increase the load of wind turbines. Therefore, the principle of grid fault ride-through control for “mechanically friendly” wind turbines is furtherly proposed.

    表 1 电网对称20%跌落故障穿越过程与正常工况的载荷结果对比Table 1 Comparison of load results between 20% symmetrical grid fault ride-through process and normal state
    表 4 Table 4
    表 3 不同有功恢复速率的载荷结果对比(20%不对称跌落故障穿越)Table 3 Comparison of load results with different active power recovery rates (20% asymmetric fault ride-through)
    图1 传动链轴系的幅频特性波特图Fig.1 Bode chart of amplitude-frequency characteristics of drive train shafting
    图2 塔架左右运动位移幅频特性波特图Fig.2 Bode chart of amplitude-frequency characteristics of side-to-side movement displacement of tower
    图3 电网对称20%跌落故障穿越过程载荷响应结果Fig.3 Load response result of 20% symmetrical grid fault ride-through process
    图4 电网不对称20%跌落故障穿越过程载荷响应结果Fig.4 Load response result of 20% asymmetric grid fault ride-through process
    图5 不同有功恢复速率的故障穿越过程载荷响应结果Fig.5 Load response of fault ride-through process with different active power recovery rates
    图 传动链轴系两质量块模型Fig. Dual-mass model of drive train
    图 传动链轴系载荷阶跃响应Fig. Step response of drive train load
    图 塔架左右方向位移阶跃响应Fig. Step response of nacelle side-side deflection
    图 双馈风电机组联合仿真模型Fig. Layout of DFIG wind trubines model
    表 2 电网不对称20%跌落故障穿越过程与正常工况的载荷结果对比Table 2 Comparison of load results between 20% asymmetric grid fault ride-through process and normal state
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引用本文

应有,孙勇,杨靖,等.大型双馈风电机组电网故障穿越过程载荷特性分析[J/OL].电力系统自动化,http://doi.org/10.7500/AEPS20190911006.
YING You,SUN Yong,YANG Jing,et al.Load Characteristic Analysis of Grid Fault Ride-through Process for DFIG Based Wind Turbine[J/OL].Automation of Electric Power Systems,http://doi.org/10.7500/AEPS20190911006.

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  • 收稿日期:2019-09-11
  • 最后修改日期:2020-04-12
  • 录用日期:2020-02-17
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