电力电缆具有安全、可靠、隐蔽、美化城市布局等优点，在当前的电力输电线路中占有很大的比重。由于电缆绝缘老化、受潮以及机械损伤等原因，随着运行时间增长，发生故障的可能性逐年增加。因此，及时地检测、排除故障具有迫切的现实意义。在行波故障测距中，传统的数据采集系统无法实现对高速变化的暂态电压、电流行波信号的高效实时采集，难以实现在线故障精确定位。因此论文以NI公司的LabVIEW为开发平台，利用高速数据传输的PCI总线以及NI PCI6221数据采集卡，设计了一套多通道电缆故障测试数据采集与远程传输系统。 首先，分析了电缆故障数据测试系统的现状，论证了实现电缆故障测试数据采集与远程传输系统的必要性。详细介绍了虚拟仪器技术及其网络化测试模型，在分析常用电量传感器优缺点的基础上，决定本系统采用闭环霍尔电流传感器来实现一次侧和二次侧电流的转换，并分析了霍尔传感器常见的误差。讨论了输电线路故障暂态过程和小波变换理论，并将小波变换运用到电缆故障信号的分析中，实现了对故障信号的小波去噪和奇异点检测，通过Matlab实验验证了该方法的可行性。 其次，根据电缆故障时要产生暂态信号的特点完成了系统的硬件和软件设计。硬件主要包括霍尔电流传感器、集成运放OP07组成的I/V转换电路、椭圆低通滤波器电路以及信号隔离电路的元件选型与设计。软件设计主要包括：用户登录、数据采集、故障报警、数据存储、数据处理、波形回放、历史查询等本地服务器软件的设计以及远程Web发布、远程前面板等传输程序的设计。 最后，设计了电缆故障的实验室模拟电路，并对电缆故障数据测试系统的采集功能、存储功能、远程传输功能等进行了测试。实验证明，该系统可以连续、可靠的运行，基本满足了数据采集和传输的要求，可为进一步的故障测距研究提供丰富的数据。

Power cable has some advantages, such as safe, reliable, and concealed, beautifying the urban layout and so on. It has a large proportion in the current power transmission lines. Due to cable insulation aging, damp and mechanical damage factors, the failure possibilities increases year by year along with the running time growth. Therefore, timely detection and trouble-shooting have the urgent practical significance. For the power cable fault location of traveling wave method, the traditional data acquisition system can't effectively access the travoling signals of transient voltage and transient current which change rapidly. It is difficult for the system to realize the precise fault positioning. A system of data acquisition and remotely transmission with multi-routeway is designed for cable fault data. The LabVIEW development platform from NI Company, the high-speed PCI bus and PCI6221 data acquisition card are used in the system. Firstly, the present situation of the cable faults testing system is analyzed and the necessity of the data acquisition and remote transmission system is stated. Then the virtual Instrument technology and networking detection model are introduced. After the detailed analysis of the advantages and disadvantages of the common used power sensor, a hall current sensor is decided to be used to transform the currenr fron the first side to the second side. Moreover, the common errors of the hall sensor are analyzed. In addition, the transient prosses of the faul in the electric transmission line and the wavelet transformation arediscussed. Then the wavelet transformation is used to denoise and detect the singular point in the cable fault signals. Matlab simulation verifies the possibility of the method. Secondly, the hardware and software of the system is designed according to the characteristics of the transient signals of cable faults. Hardware mainly includes hall current sensor, I/V switching circuit composed by the integrated amp OP07, elliptical low-pass filtercircuit, element type selection and design of signal isolating circuit. Software design includes login, data acquisition, fault alarm, data storage, data processing, waveform playback, historical inquiry. The softwares serve the local server, the remote Web publishing and the remote panel of the remote transmission. Finally, the experiment circuit is designed. The data acquisition function and storage function and remote transmission function of the cable fault detection system are tested. Experiments show that the system can operate reliably and continuously; the basic needs of data collection and transmission requirements are satisfied. The system can provided a lot of fault data for the further research on the fault locationing.