高电压技术
高電壓技術
고전압기술
HIGH VOLTAGE ENGINEERING
2012年
6期
1334-1340
,共7页
侯慧娟%盛戈皞%苗培青%李秀卫%胡岳%江秀臣
侯慧娟%盛戈皞%苗培青%李秀衛%鬍嶽%江秀臣
후혜연%성과호%묘배청%리수위%호악%강수신
局部放电(PD)%超高频(UHF)%天线阵列%非线性方程组%定位算法%Newton迭代法
跼部放電(PD)%超高頻(UHF)%天線陣列%非線性方程組%定位算法%Newton迭代法
국부방전(PD)%초고빈(UHF)%천선진렬%비선성방정조%정위산법%Newton질대법
partial discharge (PD)%ultra high frequeney ( UHF)I antenna arrayi nonlinear equations%locationalgorithm%Newton iteration method
局部放电的测量和诊断已成为评估高压电力设备运行状态的重要方法之一。但目前的局部放电监测主要以单个设备监测为主,测试仪器程序多,成本高,维护工程大。可利用4个天线组成天线阵列接收超高频(UHF)电磁波,并定义三维坐标系对变电站范围内的放电源进行全站的局放定位。重点研究了基于能量积累法计算信号起始时刻和基于信号时延序列实现放电源准确定位算法的原理,并给出了求解基于时差的以局放源位置为未知数的非线性方程组的Newton算法和网络搜索法。实验室测试和现场测试验证了基于射频天线阵列实现变电站范围内局部放电定位的有效性,提出的定位算法可以自适应求解基于时差序列的非线性方程组,既保证了求解的速度,又能解决方程的收敛问题,满足变电站全站局部放电定位准确度的要求。
跼部放電的測量和診斷已成為評估高壓電力設備運行狀態的重要方法之一。但目前的跼部放電鑑測主要以單箇設備鑑測為主,測試儀器程序多,成本高,維護工程大。可利用4箇天線組成天線陣列接收超高頻(UHF)電磁波,併定義三維坐標繫對變電站範圍內的放電源進行全站的跼放定位。重點研究瞭基于能量積纍法計算信號起始時刻和基于信號時延序列實現放電源準確定位算法的原理,併給齣瞭求解基于時差的以跼放源位置為未知數的非線性方程組的Newton算法和網絡搜索法。實驗室測試和現場測試驗證瞭基于射頻天線陣列實現變電站範圍內跼部放電定位的有效性,提齣的定位算法可以自適應求解基于時差序列的非線性方程組,既保證瞭求解的速度,又能解決方程的收斂問題,滿足變電站全站跼部放電定位準確度的要求。
국부방전적측량화진단이성위평고고압전력설비운행상태적중요방법지일。단목전적국부방전감측주요이단개설비감측위주,측시의기정서다,성본고,유호공정대。가이용4개천선조성천선진렬접수초고빈(UHF)전자파,병정의삼유좌표계대변전참범위내적방전원진행전참적국방정위。중점연구료기우능량적루법계산신호기시시각화기우신호시연서렬실현방전원준학정위산법적원리,병급출료구해기우시차적이국방원위치위미지수적비선성방정조적Newton산법화망락수색법。실험실측시화현장측시험증료기우사빈천선진렬실현변전참범위내국부방전정위적유효성,제출적정위산법가이자괄응구해기우시차서렬적비선성방정조,기보증료구해적속도,우능해결방정적수렴문제,만족변전참전참국부방전정위준학도적요구。
The measurement and diagnosis of partial discharge (PD) is accepted as the most valuable means for assessing the quality of high voltage (HV) power apparatus and its running status. However, the methods for monitoring current partial discharge are mainly based on devices, which require multi-process, high cost, and large maintenance engineering. We proposed to use four antennas array to receive ultra high frequency (UHF) signal, and defined a 3-D coordinate system to locate PD source in the field of the substation. We focused on the principles of calculating signal starting time by energy accumulation method as well as the location algorithm based on time difference, and gave a Newton algorithm and stepped-net search methods to solve the nonlinear equations. Finally, we proved the efficiency of the system by lab and site test. The algorithm can ensure the solving speed, and solve the problem of convergence, thus, it can satisfy the requirments of the accuracy of PD location in the entire substation.