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基于自适应神经元的配电网输电线路反时限过流保护优化整定方法
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作者 孙刚 孙迪康 《微型电脑应用》 2024年第7期226-229,233,共5页
为了减少反时限过流保护整定值过于依赖人工经验,缓解保护动作之间配合程度较低、电流稳定性较差的问题,提出基于自适应神经元的配电网输电线路反时限过流保护优化整定方法。分析输电线路运行模式和线路故障存在的不确定性,计算发生故... 为了减少反时限过流保护整定值过于依赖人工经验,缓解保护动作之间配合程度较低、电流稳定性较差的问题,提出基于自适应神经元的配电网输电线路反时限过流保护优化整定方法。分析输电线路运行模式和线路故障存在的不确定性,计算发生故障的概率;通过探究反向荷载率、电源容量、谐波含量等指标确定输电线的实际承载力;构建反时限过流保护动作方程,确定反时限过流保护的3种特征;以主保护与后备保护动作时差最小为目标,构建目标函数,确立约束条件;设计具有三个神经元的神经网络模型,每个神经元对应一种保护特征,引入转换模块,将输入量变换为状态量,通过神经元学习,输出最终的过流保护优化整定结果。比较实验结果表明:应用所提方法,随着故障电流增大,保护动作时间曲线未出现相交状况;在测试刚开始时,电流波形出现波动,但迅速恢复到平稳。所提方法能够使保护动作之间有效配合,输电线电流可以始终保持在稳定状态,为保护定值优化提供了新的研究思路。 展开更多
关键词 自适应神经元 配电网输电线路 反时限过流保护 谐波含量
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Geospatial Solutions in Practice for Smart Grids
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作者 Peter Birk Chris Pavlovski 《Computer Technology and Application》 2011年第3期165-171,共7页
Recently, smart grid solutions have started to extend the visibility of the electrical grid to the entire network; including high voltage transmission lines, medium voltage distribution networks, and the low voltage n... Recently, smart grid solutions have started to extend the visibility of the electrical grid to the entire network; including high voltage transmission lines, medium voltage distribution networks, and the low voltage networks to households. The typical data monitored includes: voltage, current, phase, and power measurements, together with network events and alarms. This paper analyses the key challenges facing smart grid solutions in providing effective access to large volumes of sensory data that is distributed over a large geographic area. A case study is described that outlines how the use of geospatial technology together with Web 2.0 technologies may be applied to improve user access and control to this data. The results show that a geospatial solution provides an effective mechanism for visualizing telemetry data monitored within the smart grid. 展开更多
关键词 GEOSPATIAL energy distribution graphical information system (GIS) smart grid.
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