摘要
基于考虑多阶距离无穷小的高压直流输电线路分布参数时域模型,提出了一种高压直流输电线路单极接地双端故障测距方法。利用粒子群算法来搜索整条线路沿线电压分布差值最小的对应距离,即为实际故障距离;为便于高阶求导和平滑数据中的扰动,采用麦夸特法来拟合直流故障暂态数据。与Bergeron模型进行对比,结果表明所提方法对采样率要求低,抗噪声能力强,测距结果平稳,可以实现直流输电线路全线范围内的准确定位,且测距结果不受过渡电阻和故障位置的影响。
Based on time domain distributed parameter model of high voltage direct current（HVDC） transmission line, in which the influence of multistage distance infinitesimal is considered, a two-terminal fault location method for monopolar earth fault occurred in HVDC transmission line is proposed. The particle swarm optimization（PSO） algorithm is used to search the distance corresponding to the minimum voltage distribution difference value along the transmission line, such a distance is the very fault distance. To facilitate higher derivation and to smooth the disturbance in signal, the Levenberg-Marquardt method is utilized to fit transient fault data of HVDC transmission line. Comparing fault location results by the proposed method with those by Bergeron model, it is shown that the proposed method makes a lower request on sampling rate and its noise immunity is strong and the fault location method is not affected by transition resistance and fault position, so using the proposed method it is possible to implement accurate fault location within the full length of HVDC transmission lines.
出处
《电网技术》
EI
CSCD
北大核心
2014年第8期2268-2273,共6页
Power System Technology
关键词
高压直流输电线路
故障测距
分布参数
时域
麦夸特法
high voltage direct current transmission line
fault location
distributed parameter
time domain
Levenberg-Marquardt method
