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无功反送正计条件下最佳固定补偿容量的选择 被引量:18
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作者 张丽 李群湛 贺建闽 《铁道学报》 EI CAS CSCD 北大核心 2003年第2期34-38,共5页
根据负荷无功功率特性曲线,对牵引变电所现有的固定补偿模式进行了分析,讨论了不同的无功计量方式下固定补偿的容量配置问题,指出反送正计时固定补偿存在一个最佳容量配置点,此容量下的补偿效果决定了变电所是否需要进行改造。本文用数... 根据负荷无功功率特性曲线,对牵引变电所现有的固定补偿模式进行了分析,讨论了不同的无功计量方式下固定补偿的容量配置问题,指出反送正计时固定补偿存在一个最佳容量配置点,此容量下的补偿效果决定了变电所是否需要进行改造。本文用数学的方法导出了确定最佳固定补偿容量的方法,研究了空载概率对固定补偿效果的影响,并以实测数据验证了分析结果的有效性和可行性,为变电所固定补偿容量的选择和现有补偿方案的改造提供了可靠依据。 展开更多
关键词 牵引变电所 无功补偿 空载概率
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The Natural Probability Distribution of Load and Unload Response Ratio
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作者 Chen Qifu,Yin Xiangchu,and Ma LiCenter for Analysis and Prediction,SSB,Beijing 100036,China 《Earthquake Research in China》 1997年第1期43-49,共7页
In this paper,the Gutenberg-Richter model is used to generate seismic events.The events that satisfy the random distribution are also generated.With those events,the natural probability distribution of Load and Unload... In this paper,the Gutenberg-Richter model is used to generate seismic events.The events that satisfy the random distribution are also generated.With those events,the natural probability distribution of Load and Unload Response Ratio(LURR),which measures quantitatively the degree of instability of a nonlinear system,is discussed.The study is based on stress energy release,which is chosen as the response of nonlinear system F3.The comparative results from the observation catalogue and generating data are also studied.It is revealed that the natural probability of LURR is mostly stable when the sample number is sufficient.The lower the natural probability of LURR,the more the precursory is information it may contain.The influence of Y3 resulting from the sample number and the magnitude range of events is also discussed. 展开更多
关键词 NATURAL probability Distribution System EVENT load-unload RESPONSE ratio.
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