王志华,张江南,晋阳珺,徐志伟,吴坡,李晓辉,杨芊芊
WANG Zhihua,ZHANG Jiangnan,JIN Yangjun,XU Zhiwei,WU Po,LI Xiaohui,YANG Qianqian

• 1:北京四方继保工程技术有限公司
• 2:国网河南省电力公司电力科学研究院
• 3:华北电力大学电气与电子工程学院

摘要(Abstract)：

某省区WAMS（广域测量系统）中某智能变电站数字化PMU（相量测量单元）偶尔出现频率跳变现象。首先，调取频率跳变时刻的动态数据记录和录波文件，结合现场运行方式进行分析，得出两次频率跳变事件的原因。然后，通过调整智能终端模拟量阈值、改进SV（采样值）组网模式、划分交换机VLAN（虚拟局域网）、调整装置带宽阈值，解决了SV丢点造成的频率波动；同时对SV补点提升PMU装置SV异常容错能力，丢帧数小于3不会造成频率波动超限。接着，查找现场扰动源，分析扰动造成PMU频率波动的原因，提出基于触发录波文件的扰动快速识别方法。最后，通过实验验证了所提方法的有效性。
In the wide area measurement system(WAMS) of a province, occasional frequency hopping has been observed in digital phasor measurement unit(PMU) within an intelligent substation. Firstly, dynamic data records and waveform files are retrieved during instances of frequency hopping. Analysis is conducted in conjunction with on-site operational mode, and the causes behind two instances of frequency hopping are figured out. Subsequently, adjustments are made to the analog threshold values of the smart terminal, improvements are implemented in the sampling value(SV) network mode, virtual local area network(VLAN) switches are partitioned, and bandwidth thresholds of the device are fine-tuned to address frequency fluctuations caused by SV packet loss. Moreover, SV data recovery is conducted to enhance the fault tolerance of the PMU, ensuring that a loss of fewer than 3 frames will not lead to frequency fluctuation limit. Furthermore, efforts are made to identify on-site disturbance sources and analyze the causes of disturbances leading to frequency fluctuations in the PMU. A rapid disturbance identification method based on triggering waveform files is proposed. Finally, the effectiveness of the proposed method is validated through experimentation.

关键词(KeyWords)： 智能变电站;PMU;频率跳变;SV丢点;扰动;组网
intelligent substation;PMU;frequency hopping;SV packet loss;disturbance;networking

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划（2021YFB2401003）;; 国网河南省电力公司科技项目（521702230004）

作者(Author): 王志华,张江南,晋阳珺,徐志伟,吴坡,李晓辉,杨芊芊
WANG Zhihua,ZHANG Jiangnan,JIN Yangjun,XU Zhiwei,WU Po,LI Xiaohui,YANG Qianqian

DOI: 10.19585/j.zjdl.202407005

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