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A probabilistic protection against thermal overloads of transmission lines

机译：防止传输线热过载的概率保护

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摘要

An innovative overload protection scheme is proposed to enhance the reliability of classical overload relays. The protection logic includes an accurate thermal model of bare overhead conductors, which allows to explicitly estimate the line temperature using the electrical current and weather conditions. In particular, the climatic variables are suitably represented by stochastic models that include the periodic patterns (seasonality) of meteorological phenomena. In this probabilistic context, the decision whether to trip out the transmission circuit is made according to the stochastic distribution of the conductor temperature, which is evaluated in real-time using an optimal discrete filter. Simulation results show the novel overload protection could increase the reliability of classical relays.
机译：为了提高经典型过载继电器的可靠性，提出了一种创新的过载保护方案。保护逻辑包括一个裸露的架空导体的精确热模型，该模型可以使用电流和天气条件来明确估算线路温度。特别地，气候变量可以由包括气象现象的周期性模式（季节性）的随机模型适当地表示。在这种情况下，是否根据导体温度的随机分布来决定是否使传输电路跳闸，这是使用最佳分立滤波器进行实时评估的。仿真结果表明，新型过载保护可以提高经典继电器的可靠性。

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