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电流源视角下新型电力系统同步稳定问题与分析初探

Preliminary study on synchronous stability of new power system from the perspective of current source

摘要:高比例新能源电力系统的建设,逐渐奠定了同步机-变流器互联的大电网运行格局。同步稳定作为大电网运行的基础至关重要,但目前同步机-变流器互联系统同步稳定机理尚不清晰。为此,本文在简要回顾了电力系统同步稳定研究现状的基础上,以简单的同步机-变流器两机系统为例明确了互联系统存在的同步稳定问题。从电流源视角提出变流器和同步机的统一同步机制表征方法,将其拓展到多同步机-多变流器互联系统,并定义其同步稳定性为电流矢量的相位锁定。最后,建立了电流源视角下互联系统的简化模型,并对同步稳定机理和演变规律进行了简要分析。

英文摘要:The construction of a high proportion of new energy power systems has gradually established a large power grid operation pattern of synchronous machine-converter interconnection. As the basis of large power grid operation, synchronous stability is very important. The synchronous stability mechanism of synchronous machine converter interconnection system is still unclear. Therefore, the research status of power system synchronization and stability is briefly reviewed, and the synchronization stability problems of interconnected systems are clarified by taking two machines system as an example. From the perspective of current source, a unified synchronization mechanism representation method of converter and synchronous machine is proposed, which is extended to multi synchronous machine multi converter interconnection system, and the synchronization stability of interconnected system is defined as phase locking of current vector. Finally, a simplified model of interconnected system from the perspective of current source is established, and the synchronous stability mechanism and evolution law are briefly analyzed.

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[V4] 2022-09-15 21:09:00 chinaXiv:202208.00068V4 下载全文
[V3] 2022-09-01 17:26:15 chinaXiv:202208.00068v3 查看此版本 下载全文
[V2] 2022-09-01 11:49:59 chinaXiv:202208.00068v2 查看此版本 下载全文
[V1] 2022-08-10 21:26:09 chinaXiv:202208.00068v1 查看此版本 下载全文
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