论文标题
用于高压监控应用的校准的单接触传感器
Calibrated Single-Contact Voltage Sensor for High-Voltage Monitoring Applications
论文作者
论文摘要
描述了一种用于精确测量一对导体的AC电压的单接触电压传感器。传感器设计是由需要对高压传输线进行准确的电压测量的远程监视应用程序进行的。传感器的身体是电和机械连接到单个导体的：中性或高压导体。连接到传感器的电容式传感板使用杂散的电容在非接触线上产生了电容电压隔板。使用非常高的阻抗缓冲液来测量分隔输出的电压并估计线电压。工作的一个重要部分包括一种校准传感器的方法，使得可以在不知道导体的确切几何形状的情况下进行盲电测量。设计的其他重要方面包括一个两阶段的电压分隔器，用于保持准确性并增加传感器的电压范围。这项工作得到了广泛的数值模拟模型的支持，这些模型用于确定传感板的最佳设计，并评估对包括导体间距和高度在地面高度在内的不同配置的敏感性。对于准确至1％的校准值，可以以10％的精度测量线电压。本文描述了传感器的理论，设计和实验验证，直至7.5 kVRM的线电压。
A single-contact voltage sensor designed for accurate measurements of ac voltages across a pair of conductors is described. The sensor design is motivated by remote monitoring applications where accurate voltage measurement of high-voltage transmission lines is required. The body of the sensor is electrically and mechanically attached to a single conductor: either the neutral or high-voltage conductor. A capacitive sensing plate attached to the sensor creates a capacitive voltage divider using the stray capacitance to the non-contacted line. A very high-impedance buffer is used to measure the voltage across the divider output and estimate the line voltage. An important part of the work includes a method of calibrating the sensor such that blind voltage measurements can be made without knowing the exact geometry of the conductors. Other important aspects of the design include a two-stage voltage divider for retaining accuracy and increasing the voltage range of the sensor. The work is supported by extensive numerical simulation models which were used to determine the optimum design for the sensing plate and to evaluate the sensitivity to different configurations including conductor spacing and the height above ground. For calibration values which are accurate to 1%, the line voltage can be measured with an accuracy of 10%. The paper describes the theory, design, and experimental verification of the sensor up to a line voltage of 7.5 kVrms.
