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首页> 外文会议>Record of Conference Papers - Industry Applications Society Annual Petruleum and Chemical Industry Conference >Why wait? System-wide benefits from custom overcurrent relay characteristics
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Why wait? System-wide benefits from custom overcurrent relay characteristics

机译：干嘛要等？来自自定义过流继电器特性的系统范围优势

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摘要

Various types of numerical protective relays allow the user to specify a custom overcurrent protection characteristic. For most end users this feature is simply a curiosity or completely ignored, an untapped capability of the device. Other users apply a custom curve shape in isolated cases to solve difficult coordination problems. This is rather unfortunate because the precise tripping control that can be obtained from a user-defined custom curve offers many advantages over traditional inverse curve shapes. Some of these benefits include increased safety to personnel, improved equipment protection, better handling of impact loads, and enhanced selectivity at bolted and arcing fault current levels. This paper provides specific power system examples that demonstrate the benefits of replacing electromechanical relay replications in favor of custom curve shaping obtained from numerical relays in applications starting from the incoming substation down to the unit substations and motor controllers. These samples will show how the user can specify tripping characteristics to reduce the available arc-flash energy to protect workers and equipment. They will illustrate how sudden increased loading can be accommodated to allow for a load shedding system to operate. The paper will also offer lessons learned and suggestions for future development of this custom programming feature of numerical relays.
机译：各种类型的数值保护继电器允许用户指定自定义过电流保护特性。对于大多数最终用户来说，此功能只是一种好奇或完全忽略的设备的未开发能力。其他用户在孤立的情况下应用自定义曲线形状以解决困难的协调问题。这是相当不幸的，因为可以从用户定义的自定义曲线获得的精确跳闸控制提供了与传统的反曲线形状相比的许多优点。其中一些好处包括对人员的安全性，改善设备保护，更好地处理冲击载荷，并在螺栓和电弧磁阻电流水平上提高选择性。本文提供了特定的电力系统示例，其证明了替换机电继电器复制的益处，这些优势在从进入的变电站开始到单位变电站和电机控制器的应用中，从数值继电器中获得的自定义曲线整形。这些样本将显示用户如何指定跳闸特性以减少可用的电弧能量，以保护工人和设备。它们将说明如何容纳突发的负载，以允许负载脱落系统运行。本文还将提供经验教训和对数值继电器本自定义编程特征的未来发展的建议。

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