便携式在线局部放电测量技术经济有效的绝缘诊断方法

9年来，新西兰工业研究公司(IRL NZ)开发并广泛地在电力工业中应用了快速、非侵入、便携式在线局部放电(局放)测量技术^1-2]。该技术为电力系统中日益增多的超龄老化设备提供了一经济有效的绝缘诊断工具，使工业界实施预防性维护，保护其重要设备。根据其绝缘诊断，合理地决定是否对价值百万的设备进行修理或更换。该技术广泛地用于电机、电缆、特别是户内开关母线及变压器绝缘诊断与监测。介绍和讨论了它的使用原理,经济效益和许多现场运用的结果。该便携式在线局放测量技术的优越性和其非侵入局放传感器用于各种设备的位置示例于这些现场实例中。该技术已由华能时代科技有限公司引进，正在电力系统推广应用。

A Portable On-line Partial Discharge Measuring Technique for Cost-Effective Insulation Diaguosis

Over nine years of development, and broad industrial applications, Industrial Research Ltd (IRL) has implemented fast non-invasive portable on-line partial discharge (PD) measurement for insulation assessment of various power devices 1-2]. The portable on-line PD measuring technique provides an efficient means to achieve cost-effective insulation diagnosis for the increasing large number of aged power devices widespread the systems. The technique allows industries to protect their main assets by implementing predictive and condition-based maintenance. Decisions as to whether to repair or replace million dollar assets can be made according to insulation condition assessments based on sound scientific grounds. This paper illustrates how the portable on-line PD measuring technique has been broadly applied for large machines, cables and especially aged indoor metalclad switchboard insulation assessment and monitoring. The rationales, economic benefits and findings of the extensive on-site insulation assessment are given and discussed. The advantages of the portable on-line PD measuring device and the non-invasive PD sensor positions to couple PD signal for different equipment are shown in many on-site applications.