综合电子干扰对编队对地攻击作战效能的影响

建立了编队对地攻击作战效能和战损模型,重点分析了编队综合电子干扰（雷达干扰、通信干扰、光电干扰）对敌防空预警系统、指挥引导系统以及武器制导系统的探测概率、引导概率和跟踪概率的影响,进一步指出了其对编队战损及作战效能的影响。     

碾压砼筑坝连续上升16m的施工经验

碾压砼在我国是最近几年发展起来的一种新兴筑坝技术.本文总结了在铜街子工程进行的连续上升至16m高度快速施工经验,高块连续浇筑须具备的施工条件,核算通仓浇筑带来的温度应力问题,为了解高块连续浇筑的坝体温度及变形,布置了监测仪器,并总结了观测成果。     

轴承电流的探讨

简单介绍现代工业生产中，尤其是使用变频调速的生产线中轴承易损坏的原因及解决措施，避免因轴承电流的原因损坏轴承而降低现代化生产线的效率。     

干式变压器绝缘树脂老化实验

介绍了干式变压器绝缘树脂的老化理论及热老化实验原理。参考标准进行了绝缘树脂老化试验,并进行了实验数据处理及结果分析。通过实验得到了绝缘树脂的热老化性能参数,如温度指数等,验证了绝缘树脂耐热等级的可靠性。     

基于失稳机理分析的暂态电压稳定性量化指标

在暂态过程中,当负荷母线电压值进入由系统特性和负荷特性决定的不稳定区时,会发生电压失稳。在单机单负荷系统模型中,证明同一系统静态P-V曲线和V-Q曲线的临界点具有一致性,基于动态跟踪系统特性变化的技术路线提出暂态潮流断面P-V曲线分析法,并给出暂态电压稳定性量化指标的计算方法和相应的稳定性判据。在多机系统中,虽然通常需要将所提方法与临界电压或戴维南等值电路的动态跟踪计算相结合才能应用,但也存在无需系统等值而直接应用基于单机模型的计算公式的场景。通过算例对暂态电压失稳机理、常规工程经验指标的局限性、所提指标和稳定性判据的有效性进行验证。     

Optimal Location of Unified Power Quality Conditioner in Distribution System for Power Quality Improvement

The increased use of nonlinear loads in distribution system is increasing the distortion in the voltage and current waveforms. Moreover, the distribution systems are inherently unbalanced. This paper presents Cuckoo Optimization Algorithm (COA) based Unified Power Quality Conditioner (UPQC) allocation in three phase unbalanced distribution network. The performance of UPQC is studied in terms of minimization of load disturbance during fault condition in the test systems, % reduction of total harmonic distortion and individual harmonics, minimization of real power loss, decrease in voltage unbalance and increase in cost savings during normal operating condition. The performance of COA is compared with other soft computing techniques to get the better results, i.e., better voltage profile, the optimal location and optimal number of UPQCs.     

燃烧福建无烟煤的循环流化床锅炉的设计特点及运行性能分析

介绍了新投运的燃烧福建无烟煤的循环流化床锅炉 ( CFB锅炉 )的设计特点 :采取了敷设长卫燃带、蒸发受热面布置于炉膛出口 ,增强抗磨损能力等 ,并对分离器的回料温度、返料点和返料量等设计不足进行了分析。工业实验结果显示 ,燃烧福建无烟煤的 3 5 t/h循环流化床锅炉 ,炉内添加石灰石的脱硫工艺是可行的。在 Ca/S比取 2 .5～ 3 .0、石灰石平均颗粒径取 0 .2～ 1 .0 mm时 ,可以取得较佳的脱硫运行效益     

AB5-x型贮氢合金研究

研究了非化学计量比不包覆的AB5-x型贮氢合金x值的变化对合金的结构、比容量和放电温度特性的影响。结果表明,x值在0.06～0.48范围内时AB5-x型贮氢合金性能较好。非化学计量比可提高合金的比容量及其氢化物的稳定性,分解氢压平台在25℃时仅为0.01MPa;同时改善合金的低温放电效率,x=0.29时,255K下,1C放电效率达90%;合金结构主体相符合CaCu5构型。     

用电高峰时期计量用装置应急预案的可行性探讨

对现场运行的关口电能计量装置,检定发现不合格后,研究其在不延长停电时间情况下实现等效计量。提出两种方案,描述其对应的现象,并对比结果进行论证。     

A Novel Approach to Detect Faults Occurring During Power Swings by Abrupt Change of Impedance Trajectory

The main purpose of power swing blocking is to distinguish faults from power swings. However, faults occurred during a power swing should still be detected and cleared promptly. This paper proposes an index based on detecting abrupt jump of impedance trajectory by utilization of the predicting capability of the Kalman Filter. The proposed index is calculated by assessing the difference between predicted and actual samples of impedance. The predicted impedance samples are obtained using the Kalman filter and Taylor expansion, which are used in this paper to track the phasor precisely. Second order of Taylor expansion is used to decrease the corrugation effect of impedance estimation and increase the reliability of the proposed method. Furthermore, in order to increase the selectivity of the proposed method, the proposed index is armed with phase comparison logic to detect internal faults. The instantaneous estimation and prediction capability of the Kalman filter are two reasons for proposing the use of Kalman filter. Intensive studies have been performed and the merit of the method is demonstrated by test simulations.