110 kV高压电缆GIS终端加压气室装置的研制

为开展110 kV高压电缆GIS终端的竣工交接实验,并适应电缆通道资源小型化、集约化的趋势,研制了GIS终端加压气室装置,将GIS终端插入该加压气室并引入所要施加的交接试验电压,实现了GIS终端的现场耐压试验。     

基于ARM的指纹识别系统的设计

给出了基于ARM的指纹识别系统的设计实现方法,给出了由S3C2410、指纹传感器FPS110、存储器和通信接口等组成的硬件设计,同时也给出了系统初始化,指纹采集程序和通讯程序等软件设计。在指纹识别的可靠性及快速性上,充分展现了ARM的优势。     

REF543微机型电源备自投装置在化工厂110 kV供电系统中的应用

传统备用电源自投装置采用老式继电器逻辑组合,具有二次接线复杂、功能僵化等缺点,尤其在变电站一次系统运行方式发生改变时,容易造成误动作。基于中海化学二期110kV变电站电源备自投装置,利用微机技术的应用实践对一种新型微机备用电源自投装置设计方案及逻辑框图进行了分析,此备自投装置通过软件对不同主接线方式自动进行模式识别,可改善供电运行方式的灵活性,提高供电的安全性、可靠性。     

关于T接线路差动保护应用的特殊问题探讨

T接线路在110kV电压等级应用越来越广泛。T接线路面临区内故障电流流出、区外故障CT易饱和、三端运行及两端运行方式切换等特殊问题。结合许继公司研制的WXH-813A/T装置介绍了适用于T接线路的三端差动保护的原理及配置方案,并提出了与T接线路相关特殊问题的解决方案。     

上海市非中心城区110 kV配电网发展初探

合理的高压配电电压等级对地区电网及地区经济发展都有重要意义。分析了国内和上海市110 kV电网的现状与发展趋势,根据上海市南非中心城区区域特点和电网现状,分析了影响市南地区110 kV配电网发展的主要因素,并提出了市南地区各功能区域110 kV配电网发展的建议。     

稳态和暂态电流测量合一的电子式电流互感器量程切换设计

为满足电子式电流互感器对高压电网各阶段电流都具有较高测量精度的要求,本文提出了一种新型的量程切换电路。对于采用罗氏线圈的电流互感器,通过对罗氏线圈的感应电压进行幅值和绝对值双重监测达到跟踪电压峰值变化的目的,在稳态采用幅值监测加绝对值辅助监测的方式,在暂态采用绝对值监测并反馈锁定的方式。利用得到的监测信号控制仪表放大器INA110的电路连接对罗氏线圈各阶段的感应电压进行不同放大,从而实现量程的高速自动切换。实验表明这种设计能使电流互感器快速自动切换量程以充分利用其内部电子资源。本文对电子式电流互感器的设计有一定的参考价值。     

110kV数字化变电站通信系统解决方案

介绍了110 kV数字化变电站的特点,从数字化变电站通信要求出发,分析了适合110 kV数字化变电站的组网方案。经过对比分析各种组网结构和通信技术的优缺点,为满足结构上的功能冗余和网络容错、信息数据传输的实时和安全性等方面要求,提出了一种综合多种网络技术的数字化变电站系统结构。     

Phase evolution and <110>-orientation mechanism in RTGG-processed BaTiO3 ceramics with electrical properties

The <110>-oriented BaTiO₃ ceramics were fabricated using BaCO₃ matrix and H_1.08Ti_1.73O₄.nH₂O (HTO) template particles, and the mechanism of BaTiO₃ phase formation was investigated. The dielectric, ferroelectric, and piezoelectric properties were also investigated. The transformation of the HTO phase into the TiO₂ bronze or TiO₂ (B) phase was observed at 600°C, where the BaTiO₃ nucleation was accompanied by the formation of a Ba₂TiO₄ phase. The TiO₂ phase reacted with the Ba₂TiO₄ phase at 800°C to give a BaTiO₃ phase, whereas its reaction with the BaTiO₃ resulted in the formation of BaTi₂O₅ phase that got decomposed into BaTiO₃ and Ba₆Ti₁₇O₄₀ phase at sintering temperature ≥1300°C. Sintering with samples’ embedding in BaTiO₃ powders prevented the formation of the Ba₆Ti₁₇O₄₀ secondary phase. The crystallographic orientation along the <110> direction (F₁₁₀) was developed by the epitaxial grain growth mechanism. In addition to the contribution of the grain-size increment for enhancing the F₁₁₀, the preservation of the platelike structure was also found to have a significant impact. The ceramics prepared by the embedded sintering (grain size ≈12.4 µm and F₁₁₀ = 83%) exhibited the room-temperature dielectric constant of 1708 and piezoelectric strain constant of 445 pm/V, which are higher than those of the BaTiO₃ ceramics with randomly oriented grains.     

20万t/a离子膜烧碱整流系统设备的配置

介绍了昊华宇航化工公司20万t/a离子膜烧碱整流系统的配置情况。该系统的投入降低了烧碱装置的能耗,提高了整流供电系统的稳定性。     

Preparation of (110)-oriented SrTiO3 film on quartz glass by laser chemical vapor deposition

SrTiO₃ (STO) film was prepared on quartz glass by laser chemical vapor deposition at a deposition temperature (T_dep) ranged from 760 to 1104 K. Effect of the T_dep on the orientation, crystallinity, texture, and microstructure of the STO film was investigated. As the T_dep was increased, the preferred orientation of the STO film tended to be (110)-orientated with corresponding texture coefficient (TC) on the (110) reflection enhanced from 2.3 to 6; meanwhile, the full width at half maximum of the ω-scan on the (110) reflection decreased from 0.85° to 0.59°. The (110)-oriented grains were in wedge shape about 60 × 150 nm in size, which tended to be flat at an elevated T_dep of 1104 K.