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作 者:陈艳珊 李昊恒 刘洋[1] Chen Yanshan;Li Haoheng;Liu Yang(School of Electric Power,South China University of Technology,Guangzhou Guangdong 510641,China)
出 处:《电气自动化》2024年第6期51-54,共4页Electrical Automation
摘 要:现有跟网/构网控制方法难以实现在强、弱电网中的一致稳定运行,因此提出一种基于直流电压同步的磁链源型构网控制方法。基于直流电压同步控制环和交流电压幅值控制环获取并网母线三相磁链参考值,通过脉宽调制控制实现实际磁链对参考磁链的跟踪,使得逆变器具备磁链源特性。推导了磁链追踪误差的有界性,对磁链同步控制进行了稳定性分析,进行了大干扰稳定性测试分析。结果表明,磁链源型构网逆变器相比传统跟网和构网逆变器具有更优异的短路恢复能力和同步稳定性,并且可与强、弱交流电网兼容稳定运行。The existing grid following/grid forming control methods are difficult to achieve consistent and stable operation in both strong and weak electrical networks.For this purpose,a magnetic flux source type grid forming control method based on DC voltage synchronization was proposed.Based on the DC voltage synchronization control loop and the AC voltage amplitude control loop,the three-phase magnetic flux reference value of the grid connected bus was obtained.Through pulse width modulation control,the actual magnetic flux was tracked against the reference magnetic flux,enabling the inverter to have magnetic flux source characteristics.Then,the boundedness of magnetic flux tracking error was derived,stability analysis of magnetic flux synchronization control was conducted,and large disturbance stability testing analysis was carried out.The results show that the magnetic flux source type grid inverter has better short-circuit recovery ability and synchronization stability compared to the traditional grid following and grid forming inverters,and can be compatible with strong and weak AC power grids for stable operation.
关 键 词:磁链同步 构网控制 直流电压同步 脉宽调制 大干扰稳定
分 类 号:TM712[电气工程—电力系统及自动化] TM46
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