| 引用本文: | 黄林彬,辛焕海,鞠平,胡家兵.电力电子并网装备的同步稳定分析与统一同步控制结构[J].电力自动化设备,2020,40(9): |
| HUANG Linbin,XIN Huanhai,JU Ping,HU Jiabing.Synchronization stability analysis and unified synchronization control structure of grid-connected power electronic devices[J].Electric Power Automation Equipment,2020,40(9): |
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| 摘要: |
| 随着新能源、直流输电、储能等技术的发展，大规模电力电子装备接入电网并深刻地改变着现代电力系统的动态特性。与同步发电机不同，电力电子装备由半导体开关器件所构成，它与电网之间的同步特性不是由物理旋转的转子主导，而是由相应的控制策略决定，即电力电子装备的大规模渗透使得电力系统逐渐由同步发电机主导的“物理同步”转变为“控制同步”。电力电子装备的高可控性与灵活性为提高电力系统的同步稳定性和动态性能提供了可能，但目前由于对电力电子装备“控制同步”特性的认识尚未完全清晰，难以做到发挥电力电子装备的优势以提升系统动态性能，甚至在很多情况下还会因为同步控制设计的不合理而出现同步失稳现象，危及电力系统安全稳定运行。为此，简要回顾当前电力电子装备的同步稳定分析与控制设计等方面的成果，并基于现有的同步控制结构，提出一种涵盖了锁相环型控制与组网型控制的统一同步控制结构，通过将不同类型的同步控制结构解析为控制回路之间连接方式的不同，进而将不同的同步控制结构参数化，并以此探索更优的同步控制结构。最后，对现有的同步稳定分析方法、技术路线与物理认识进行总结，并从中凝练出未来可能的研究方向。 |
| 关键词: 电力电子装备 同步稳定 控制同步 锁相环 组网型控制 统一同步控制结构 |
| DOI：10.16081/j.epae.202009042 |
| 分类号:TM34;TM712 |
| 基金项目:国家电网有限公司总部科技项目(适应高比例新能源接纳的电网强度评估及优化方法研究)(521104200031) |
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| Synchronization stability analysis and unified synchronization control structure of grid-connected power electronic devices |
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HUANG Linbin1, XIN Huanhai1, JU Ping1, HU Jiabing2
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1.College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China;2.School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
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| Abstract: |
| With the development of renewable energy, DC power transmission and storage technology, the large-scale power electronic devices are integrated into modern power grids, which significantly changes the characteristics of power systems. Different from conventional synchronous generators, power electronic devices that consist of semiconductor switching devices have no rotational part and their dynamics of synchronization are determined by the converters’ control strategies. Hence, ever-increasing penetration of power electronic devices make the power system gradually change from physical synchronization dominated by synchronous generators to control synchronization. Although the high controllability and flexibility of power electronic devices can possibly improve the synchronization stability and dynamic performance of power system, control synchronization characteristics of power electronic device have not been fully understood. It is difficult to give full play to the advantages of power electronic devices to improve the dynamic performance of system. Even in many cases, synchronization instability will occur because of the unreasonable design of synchronization control, endangering the safe and stable operation of power system. So some research works on the synchronization stability analysis and control design of power electronic devices are briefly reviewed. Moreover, a unified synchronization control structure is proposed, which covers the structures of phase locked loop based control and some types of grid-forming control. This unified synchronization control structure quantitively parameterizes different synchronization controls as different connections among control loops, which lays the foundations for searching optimal control structures. Finally, the possible future research directions are discussed based on existing analysis methods, technical solutions and intuitive understandings on the synchronization of power electronic devices. |
| Key words: power electronic devices synchronization stability synchronization of control phase locked loops grid-forming control unified synchronization control structure |
