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Fuzzy-based Non-communicating Adaptive Overcurrent Relay ?

机译：基于模糊的非传送自适应过电流继电器 ？

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摘要

The technological advances of the electrical power system have brought several benefits including more robust and safe operation. Microprocessor-based digital relays may provide important features such as allowing quick and efficient setting according to the network changes. Considering the load variations throughout the day, such function becomes essential to maintain the coordination of the protection system. Adjusting the parameters of an overcurrent protective device manually may introduce non-optimal settings, mostly due to the difficulties in dealing with many possible solutions. This paper shows the modeling of an adaptive protection system based on Fuzzy Logic which parametrizes the pick-up current of inverse-time overcurrent relays by not demanding a centralized processing structure and communication among them. Two variables are taken into account: the pre-fault current and the variation of current. The IEEE 4-bus test system is used in ATP-EMTP program to illustrate the method considering several load, short-circuit and fault resistance values. The results confirms the benefits of smart protection system which adapts automatically according to the changes and has considerable sensitivity for high impedance faults. The proposed method is not dependent of system size.
机译：电力系统的技术进步带来了多种益处，包括更强大和安全的操作。基于微处理器的数字继电器可以提供重要的特征，例如根据网络改变允许快速高效的设置。考虑到整个一天的负载变化，这种功能对于维持保护系统的协调变得必不可少。调整过电流保护装置的参数手动可能引入非最佳设置，主要是由于处理许多可能的解决方案时的困难。本文展示了基于模糊逻辑的自适应保护系统的建模，该模糊逻辑通过求偏移过电流继电器的拾取电流而不是要求它们之间的集中式处理结构和通信。考虑两个变量：预故障电流和电流的变化。 IEEE 4-Bus测试系统用于ATP-EMTP程序，以说明考虑多个负载，短路和故障电阻值的方法。结果证实了智能保护系统的益处，其根据变化自动适应，对高阻抗断层具有相当大的灵敏度。所提出的方法不依赖于系统尺寸。

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