摘要
高压设备随着绝缘水平下降会发生局部放电现象(PD),放电信号由波长不等的电磁波构成,可能会传播到设备外面的空气中。文中采用由4个盘锥天线构成的矩形天线阵列来接收空气中辐射的超高频局部放电信号,因矩形天线阵列可在测量时移动,可通过移动实现局放的检测定位。文中重点研究了利用信号首峰确定各路信号其实时刻和基于各个天线接收信号的时间到达的不同(TDOA)的方向定位算法。通过实验验证了基于矩形天线阵列的方向定位算法的正确有效性。
Partial discharge（PD）occurs when the insulation of high voltage equipment degrades. The discharge signal is composed of electromagnetic waves with different wave lengths, which may radiate into the air outside the equipment. In this paper, rectangular UHF antenna array made up of four disk-cone antennas is used to receive the radiated UHF signals from air. Partial discharge source could be detected and located by moving detection of the array. Emphasis is laid on determining the initial time of each signal and the time difference of the arrive（TDOA）by making use of first peak of signal. Experiments verify the validity of the proposed direction location algorithm based on rectangular antenna array.
出处
《高压电器》
CAS
CSCD
北大核心
2015年第4期46-50,共5页
High Voltage Apparatus
关键词
矩形天线阵列
变电站
局部放电
超高频
方向定位
rectangular antenna array
substation
partial discharge
ultra high frequency
direction location
