低压微网中永磁风力发电系统逆变器控制策略研究

发布时间：2018-02-22 05:31

本文关键词： 低压微网风力发电系统瞬时功率电容电流功率解耦控制　出处：《电测与仪表》2015年22期 　论文类型：期刊论文

【摘要】：在低压微网中,以永磁风力发电并网系统的逆变器为研究对象,主要研究了风力发电系统在并网和离网两种模式下系统逆变器的控制策略。对于系统处于并网和离网情况下,逆变器电流内环采用瞬时电容反馈电流控制,有效解决了因LCL滤波器引起的系统不稳定控制问题。针对两种不同模式下,对并网模式下系统的逆变器控制采用瞬时功率外环、瞬时电容电流PIR内环控制;离网模式下采用负载电压为外环、瞬时电容电流PIR控制为内环的双闭环控制。经过仿真分析,外环瞬时功率控制实现了风力发电并网系统逆变器给定功率控制,在系统输出功率发生变化的情况下,电流具有快速精确的动态跟踪性能,实现了系统功率解耦控制,保证了系统输出高质量电能,有效验证了文中控制策略的可行性。
[Abstract]:In the low voltage microgrid, the inverter of permanent magnet wind power grid connected system is taken as the research object, the control strategy of the system inverter in grid-connected and off-grid mode is mainly studied. Inverter current inner loop is controlled by instantaneous capacitive feedback current, which effectively solves the unstable control problem caused by LCL filter. For two different modes, instantaneous power outer loop is used for inverter control in grid-connected mode. Instantaneous capacitive current PIR inner loop control, off-grid mode using load voltage as outer loop, instantaneous capacitance current PIR control as inner loop double closed loop control. The instantaneous power control of the outer loop realizes the given power control of the inverter in the grid-connected system of wind power generation. When the output power of the system changes, the current has the fast and accurate dynamic tracking performance, and realizes the decoupling control of the system power. The system output high quality electric energy is guaranteed, and the feasibility of the control strategy is verified effectively.
【作者单位】：新疆大学电气工程学院;教育部可再生能源发电与并网控制工程技术研究中心;国网宜宾电力公司;
【基金】：国家自然科学基金资助项目(51267017) 教育部创新团队项目(IRT12855)
【分类号】：TM614;TM464

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