高压架空导体电流远程测量的不确定度评定与验证

2011 International Conference on Power Engineering, Energy and Electrical Drives Pub Date : 2011-05-11 DOI:10.1109/POWERENG.2011.6036482

P. Cruz, A. de la Villa-Jaén, A. Gómez-Expósito, J. A. Pérez

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引用次数: 1

摘要

本文分析了在高压架空导体电间隙处采用低成本磁场传感器(感应线圈)测量50hz电流的不确定度。假设附近不存在外磁场源。评估了与单相系统下电流测量相关的扩展不确定度。结果在实验室设置中得到验证。首先考虑单个传感器，然后考虑3个传感器的情况。在最后一种情况下，由于存在冗余，采用最小二乘法来降低测量的不确定度。

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Uncertainty assessment and validation of current remote measurement on high voltage overhead conductors

This paper analyzes the uncertainty in the measurement of 50-Hz current on high voltage overhead conductors by means of low-cost magnetic field sensors (inductive coils) located at the electric clearance from the conductors. It is assumed that no external magnetic field sources exist in the vicinity. Expanded uncertainty associated with the measurement of current under a single-phase system is evaluated. The results are validated in a lab setup. A single sensor is considered first, followed by the case of 3 sensors. In this last case, due to the redundancy the least squares method is applied to reduce the uncertainty of the measurement.

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2011 International Conference on Power Engineering, Energy and Electrical Drives

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