摘要
为了准确监测高压电柜局部放电现象,避免高压电柜故障及电力系统失稳风险的发生,研究基于主动式频谱感知的高压电柜局部放电在线监测系统。系统包含主动式频谱感知单元、采集与存储单元、DSP控制处理单元及后台监测软件单元。通过主动式频谱感知单元接收高压电柜放电时产生的各类电磁波信号,对此类信号实施放大、分离、滤波及频谱空穴判别等处理,提取局部放电信号;经多信道传输此信号到采集与存储单元实施模拟信号采集与存储,运用DSP控制处理单元对所存储的模拟信号实施运算,获取放电脉冲量与数字信号;将数字信号输送到后台监测软件单元分析局部放电位置及类别,完成对高压电柜局部放电的在线监测。结果表明,所提系统具有理想的监测效果,可准确监测不同类别与不同频段的局部放电信号,在实际应用中可监测出局部放电量最高的高压电柜,有效规避高压电柜产生故障风险,保障电力系统的安全稳定运行。
In order to accurately monitor the phenomenon of partial discharge of high voltage cabinet and avoid the risk of failure of high voltage cabinet and instability of power system,an on-line monitoring system for partial discharge of high voltage cabinet based on active spectrum sensing is studied.The system consists of active spectrum sensing unit,acquisition and storage unit,DSP control processing unit and background monitoring software unit.The active spectrum sensing unit receives all kinds of electromagnetic wave signals generated by the discharge of high voltage cabinet,and carries out amplification,separation,filtering and spectrum hole discrimination processing to extract partial discharge signals.The signal is transmitted to the acquisition and storage unit through multiple channels for analog signal acquisition and storage.The DSP control processing unit is used to calculate the stored analog signal and obtain the discharge pulse quantity and digital signal.The digital signal is sent to the background monitoring software unit to analyze the location and type of partial discharge,and complete the on-line monitoring for partial discharge of high voltage cabinet.The results show that the system has an ideal monitoring effect and can accurately monitor different types of partial discharge signals and different frequency bands.In practical application,the high voltage cabinet with the highest partial discharge can be monitored,which can effectively avoid the failure risk of the high voltage cabinet and ensure the safe and stable operation of the power system.
作者
欧阳乐成
赵慕阶
OUYANG Lecheng;ZHAO Mujie(Zhangzhou Power Supply Company of State Grid Fujian Electric Power Co.,Ltd.,Zhangzhou 363000,China;School of Instrument Science and Engineering,Southeast University,Nanjing 210003,China)
出处
《微型电脑应用》
2024年第1期96-99,102,共5页
Microcomputer Applications
基金
国网福建省电力有限公司科技项目资助(52135019010V)。
关键词
主动式
频谱感知
高压电柜
局部放电
信号分离
滤波降噪
active mode
spectrum sensing
high voltage cabinet
partial discharge
signal separation
filtering noise reduction
作者简介
欧阳乐成(1985-),男,硕士,配网运维管理高级师,研究方向为配网运行管理及设备在线监测技术;赵慕阶(1988-),男,博士研究生,高级工程师,研究方向为自动化技术、物联网感知技术、智能电子信息系统。
