摘要
同步相量测量单元(phasor measurement unit, PMU)为电网运行监测提供了精准数据,然而通信中断、设备故障等原因导致数据质量问题愈发显著。某工程现场PMU上送主站数据出现功率振荡异常现象,分析发现直接原因是母线电压选取错误,工程现场复杂的电网配置使得电压选取面临挑战。基于层次分析法对各电压选取方案的决策效果进行量化评估,综合考虑方案的优劣及适应性,最终推荐在特定场景下使用电压切换装置选取母线电压。该装置通过接入一次设备的刀闸,从而自动选择最佳电压源以保障母线电压随一次设备的运行方式同步切换,保障了PMU数据采集的准确性和一致性,进而提升了PMU数据质量。研究结果为涉及母线电压选取的实际应用场景提供了科学的决策支持,结合当地电网运行状况,为提升数据质量和优化电网监控提供有效方案。
The synchronous Phasor Measurement Unit furnishes precise data for the monitoring of power grid operation.However,data quality problems have become increasingly prominent due to causes such as communication disruptions and equipment malfunctions.At a certain engineering site,abnormal power oscillation emerged in the data sent from the PMU to the main station.The analysis disclosed that the direct cause was the incorrect selection of bus voltage.The complex power grid configuration at the engineering site poses challenges to voltage selection.In this paper,the decision-making effects of each voltage selection scheme are quantitatively evaluated based on the Analytic Hierarchy Process,comprehensively considering the merits and demerits as well as the adaptability of the schemes.Eventually,it is recommended to employ a voltage switching device to select the bus voltage in specific scenarios.This device,by connecting to the disconnector of the primary equipment,automatically selects the optimal voltage source to ensure that the bus voltage synchronously switches along with the operation mode of the primary equipment,guaranteeing the accuracy and consistency of PMU data collection and thereby enhancing the data quality of PMU.The research findings provide scientific decision support for practical application scenarios related to bus voltage selection.Combined with the local power grid operation conditions,they offer effective solutions for improving data quality and optimizing power grid monitoring.
作者
廖梦竹
徐飞阳
李娜
王志华
刘灏
刘勇
LIAO Mengzhu;XU Feiyang;LI Na;WANG Zhihua;LIU Hao;LIU Yong(State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources,North China Electric Power University,Beijing 102206,China;North China Branch of State Grid Corporation of China,Beijing 100053,China;State Grid Shandong Electric Power Company,Shandong,Jinan 250001,China;Beijing Sifang Jibao Engineering Technology Co.,Ltd.,Beijing 100083,China)
出处
《广东电力》
北大核心
2025年第8期91-101,共11页
Guangdong Electric Power
基金
国家电网有限公司科技项目(5100-202199530A-0-5-ZN,5211DS21N013)。
关键词
同步相量测量单元
数据质量
母线电压选取
电压切换装置
层次分析法
synchronized phasor measurement unit
data quality
bus voltage selection
voltage switching device
analytic hierarchy process
