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据国外电力公司统计,大约80%的用户故障源于配电系统。在配电馈线上配置一定数量的开关设备是提高供电可靠性的有效措施。科学、合理地配置开关设备,可获得巨大的经济效益和社会效益;反之,如果配置不当将会扩大故障影响范围,降低供电质量。 相似文献
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<正>窃电不仅给电力企业造成了巨大的经济损失,而且严重扰乱了正常供用电秩序,威胁电网及人身安全,同时,也直接影响工农业生产和人民群众的生活,不利于和 相似文献
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研究了铟电解精炼提纯的方法及工艺。为了提高铟电解提纯的效果,建议使用电解液循环通过高纯铟柱的总体电解工艺流程。通过研究电解液组成及酸度、电流密度等关键参数对电解提纯的影响,得出铟电解精炼提纯的关键参数为:硫酸体系电解液,成分为100g/L硫酸铟+70~100g/L氯化钠+0.5g/L明胶;电解液的酸度控制在pH=2~2.5;设计电解槽的同极距为40~50mm;阴极板用钛板;控制电解过程中的电流密度在35~65A/m2之间;电解过程中,电解液循环通过高纯铟柱,达到电解过程中净化铟电解液的效果,显著提高铟电解精炼提纯的效果。 相似文献
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In order to evaluate the effect of stoichiometric ratio upon electrochemical properties of AB5-type hydrogen storage alloys, a series of alloys Mm0.8La0.2(Ni4.0Mn0.2Al0.3Co0.37Fe0.13)a (a=0.90-1.08) were prepared and the electrochemical properties were tested. Mm0.8La0.2Ni4.0Mn0.2Al0.3Co0.37Fe0.13 was one of some new low cobalt AB5-type hydrogen storage alloys which had been researched to have good electrochemical properties. The results show that the stoichiometric ratio has great effects on the electrochemical properties of alloys. And the effects were investigated in detail. When stoichiometric ratio x〈5.3, the activation performances of alloys are all good. But when stoichiometric ratio x〉5.3, the activation performances are decreased evidently. When stoichiometric ratio x〈5.3, the discharge capacities of alloys are linearly increased with the increase of stoichiometric rati0. When stoichiometric ratio x〉5.3, the discharge capacities of hydrogen storage alloys decrease linearly rapidly by the raise of stoichiometric rati0. Overstoichiometry is good to the cycle lives of alloys. When stoichiometric ratio is between 4.8 and 5.4, voltage platforms of alloys tend to increase linearly with the increasing ofx. When x〉5.4, the increase of stoichiometric ratio leads to the decrease of voltage platform of alloys. 相似文献
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利用变压器油中溶解气体分析和判断设备潜伏性故障已广泛应用于电力系统。介绍了准确利用三比值等特征气体法来识别设备故障,及对故障类型的判断,并指出油中气体分析判断应排除外界因素影响。 相似文献
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