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基于撬棒保护电路的双馈风电机组的无功协调控制方法研究

更新时间:2020-09-18 06:32:54 大小:384K 上传用户:IC老兵查看TA发布的资源 标签:保护电路双馈风电机 下载积分:2分 评价赚积分 (如何评价?) 打赏 收藏 评论(0) 举报

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电网故障下撬棒(Crowbar)保护电路能够帮助风电机组实现低电压穿越,为转子故障电流提供旁路并限制其幅值。在Crowbar保护电路退出运行时,风电机组需要吸收大量的无功功率,这大大影响了风电系统恢复稳定运行的能力。针对以上问题,根据Crowbar保护电路的动作情况,提出了一种利用双馈风机网侧变换器进行无功补偿的控制策略,并进行了仿真分析。仿真结果表明,通过双馈风机网侧变换器为电网提供无功支持,Crowbar保护电路退出时刻吸收的无功功率明显减小,增强了系统恢复稳定运行的能力。

Crowbar circuit could help wind turbines to achieve the low voltage ride through (LVRT) under fault in power network, which provided a bypass for the fault current in the rotor and limits its amplitude. However, wind farms need to absorb a large number of reactive power when the Crowbar protection circuit was out of service , which will greatly affect the ability of wind power system to resume normal operation. In view of this situation, proposes a control strategy of reactive power compensation based on the grid side converter of doubly fed induction generator was according to the action of Crowbar circuit and the simulation analysis was carried out . Simulation results showed that the grid side co...

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基于撬棒保护电路的双馈风电机组的无功协调控制方法研究.pdf 384K

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