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电涌保护器对电源系统干扰的影响分析
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作者 汤威 《建筑电气》 2024年第4期19-22,共4页
介绍电源系统干扰的概念、干扰类型、干扰特性,尤其是雷击电涌和操作过电压干扰;分析电涌保护器(SPD)对电源系统干扰的响应情况;指出应利用SPD对电源系统干扰的响应以提供对设备的保护。
关键词 电源系统干扰 电涌 外部电涌 内部电涌 电涌保护器 协调配合 暂态过电压 失效模式
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巧提电测仪器仪表准确度
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作者 杨仲 《企业标准化》 2004年第7期45-45,共1页
随着国民经济的发展和科学技术的进步,人们对产品的性能要求越来越高.为了实现产品的高性能,产品结构越来越复杂.而结构复杂化带来的主要问题之一,是容易出故障.一旦出了故障,功能就无法实现,再高的性能也无实用价值.这正是现代设备或... 随着国民经济的发展和科学技术的进步,人们对产品的性能要求越来越高.为了实现产品的高性能,产品结构越来越复杂.而结构复杂化带来的主要问题之一,是容易出故障.一旦出了故障,功能就无法实现,再高的性能也无实用价值.这正是现代设备或仪器仪表所面临的严峻现实. 展开更多
关键词 准确度 电源系统干扰 屏蔽 并联接地 布线 电测仪器 电测仪表
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Removal of jamming using independent component analysis in non-cooperative passive detection system
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作者 应涛 Huang Gaoming +2 位作者 Shan Hongchang Zuo Wei Gao Jun 《High Technology Letters》 EI CAS 2016年第2期177-182,共6页
Due to electronic jamming transmitted by hostile electromc jamming equtpmcnts tional jamming from other illuminating sources in the complex electromagnetic environment, the per- formance of non-cooperative passive det... Due to electronic jamming transmitted by hostile electromc jamming equtpmcnts tional jamming from other illuminating sources in the complex electromagnetic environment, the per- formance of non-cooperative passive detection systems may degrade it significantly. To solve the problem, a receiving frame with multiple channels for signal preprocessing is designed and a theoret- ical analysis to the received signals in the complex electromagnetic environment is provided. Fur- thermore, a scheme for jamming removal using independent component analysis is proposed. Simula- tion results demonstrate the proposed scheme appears as a very appealing solution for removal of jam- ming and an approximate lOdB signal to distortion ratio over traditional schemes is obtained. 展开更多
关键词 non-cooperative passive detection system jamming removal independent compo-nent analysis (ICA)
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A novel control scheme for simultaneous elimination of imbalance, disturbance and voltage harmonic in power systems
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作者 Javad Olamaei Farnoosh NarjabadiFam Amid Nazeri 《Journal of Central South University》 SCIE EI CAS 2014年第4期1368-1375,共8页
In recent years, the increasing application of nonlinear and unbalanced electronic equipment and large single phase loads have made voltage imbalance a serious problem in power distribution systems. A novel approach h... In recent years, the increasing application of nonlinear and unbalanced electronic equipment and large single phase loads have made voltage imbalance a serious problem in power distribution systems. A novel approach has been proposed to eliminate voltage imbalance and disturbances. The main strategy of this scheme is based on series active filter. By improving control circuit toward existing schemes and proposing a new strategy to control the voltage amplitude, simultaneous elimination of voltage imbalance, faults, voltage harmonics and also compensation of voltage drop in transmission lines become possible. Eventually, the voltage on the load side is a perfectly balanced three phase voltage with specific proper amplitude. The proposed scheme has been simulated in a test network and the results show high capability of this scheme for the complete elimination of imbalance without phase shift. 展开更多
关键词 power quality series active filter voltage imbalance voltage harmonic symmetrical components
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一点接地及四极开关 被引量:6
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作者 凌智敏 《建筑电气》 2016年第2期8-17,共10页
一点接地及四极开关均是治理杂散电流、杂散电磁干扰的措施,介绍"一点接地"及"四极开关"治理杂散电流的机理,提出:应优先选用"一点接地";当变配电所与发电机房相距远采用"四极开关"时,应加强... 一点接地及四极开关均是治理杂散电流、杂散电磁干扰的措施,介绍"一点接地"及"四极开关"治理杂散电流的机理,提出:应优先选用"一点接地";当变配电所与发电机房相距远采用"四极开关"时,应加强维护管理将"断零"的可能降到最低;有条件时可选用高压发电机组与市电进行切换;提示注意"一点接地"与PE线接地的区别。 展开更多
关键词 杂散电流 杂散电磁干扰:低压配电系统电源侧接地 一点接地 四极开关 电源系统 电源切换装置(ATSE装置)
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