高型布置变电站构架结构运行中大修实践

介绍了新周变电站配电装置结构特点 ,分析了运行中存在的主要问题 ,提出了运行中大修的施工解决方案。     

变电站自动化改造方案探讨

分析变电站自动化改造的技术变现方法,结合110KV变电站改造的基本原则,提出了常规变电站自动化改造的设想,技术功能等问题的解决方案。     

110kV伦教变电站RTU的改造措施

介绍伦教变电站ＲＴＵ应用Ｄ２０模块进行改造的方法,提供了一个经济、快捷、优质的ＲＴＵ改造方案。     

超高压变电站运行条件下的电气改造方案论述

新时期社会经济发展日益强盛,电力负荷也随之逐年攀升,导致局部地区供电不足,不得不以拉闸断电的方式来保持工业的正常供电,所以对超高压变电站在运行条件下实施改造势在必行。本文以某地电网的超高压变电站运行条件下的电气改造方案为例,分析超高压变电站需要改造的原因及改造时需遵循的基本原则,以及对实例的改造进行分析,找出其中存在的优缺点,最后给出配电装置改造建议。     

火警自动报警系统在城网改造变电站中的应用

论述了火灾自动报警在天津域网建设无人值班变电站中的应用，变电站中的火灾报警系统设计与民用建筑设计有所不同，其布置和选型都受电气设备本身性质及其布置的影响，育其特殊性，同时火灾报警系统的应用为无人值班变电站完全自动化运行提供了可靠的保证。     

东郊一次变电站无人值班改造的实现

结合长春地区220kV东郊一次变电站按无人值班变电站要求改造远动系统工作，介绍了变电站微机远动装置、自动化与继电保护信号、光字牌的连接、通讯规约和工程施工调试等几方面的情况，供有关人员参考。     

超高压变电站监控系统

500kV及以上超高压变电站监控系统均采用基于现场总线或计算机局域网技术开发的开放式分层分布体系结构。监控系统的配置更加合理,数据传输分为间隔层和变电站层2层设备结构,是超高压变电站监控系统的主流方案。论述了超高压变电站的保护信息管理子站的设备配置以及和计算机监控系统的关系,计算机监控与保护信息管理子站分工更加明确。理想的对时方案是配置一套独立的全球定位系统(GPS)卫星同步时钟实现超高压变电站内计算机监控系统、保护装置及故障录波等设备的时间同步。提出五防闭锁双重化的概念,保证后台、间隔层、就地3种操作方式的可靠电气防误闭锁。超高压变电站监控系统信息交换方式更加多样化,通信接口采用以太网。传输速度更快,为无人值班站的通信提供了保障。     

Optimal planning of high voltage distribution substations

Aimed at solving the problem of optimal planning for high voltage distribution substations, an efficient method is put forward. The method divides the problem into two sub-problems: source locating and combinational optimization. The algorithm of allocating and locating alternatively (ALA) is widely used to deal with the source locating problem, but it is dependent on the initial location to a large degree. Thus, some modifications were made to the ALA algorithm, which could greatly improve the quality of solutions. In addition, considering the non-convex and non-concave nature of the sub-problem of combinational optimization, the branch-and-bound technique was adopted to obtain or approximate a global optimal solution. To improve the efficiency of the branch-and-bound technique, some heuristic principles were proposed to cut those branches that may generate a global optimization solution with low probability. Examples show that the proposed algorithm meets the requirement of engineering and it is an effective approach to rapidly solve the problem of optimal planning for high voltage distribution substations. Translated from Journal of Tianjin University, 2006, 39(8): 889–894 [译自: 天津大学学报]     

我国高压及超高压交联聚乙烯绝缘电力电缆的应用与发展

本文介绍我国 110 k V及 2 2 0 k V交联聚乙烯 (XL PE)绝缘电缆及其附件的发展。高压 XL PE电缆是我国城市电网建设与改造工程采用地下电缆输电系统的首选产品。本文叙述 XL PE电缆的绝缘设计原则、绝缘质量控制要求 ,特别是绝缘中杂质、微孔以及绝缘与半导电屏蔽界面的微孔与凸起、绝缘收缩与交联工艺的关系 ,及电缆附件的选型与预制附件橡胶应力锥的设计方法。介绍了我国特大城市 ,上海、北京与广州高压电缆系统的应用情况。最后对我国 110 k V及 2 2 0 k V XL PE电缆及附件进一步发展以及 5 0 0 k V XL PE电缆系统发展与应用前景作了预测     

Evaluation of magnetic induction inside humans at high voltage substations

The exposure to power frequency magnetic fields including those resulting from electrical power substations is playing a vital role in the human biological study. This paper presents a thorough investigation into the evaluation of the internal induced electric fields and induced current densities that are induced inside the human body due to the exposure to the external magnetic fields produced by a conventional 220/66 kV power substation.The effects of different parameters such as human location, human dimensions and the incident angle of the external magnetic field on the induced electric fields and current densities inside the human body are considered, through the theoretical cases. On the other hands, a typical case is presented to account for the induction levels over the human height due to external magnetic fields corresponding to the actual measured values at different locations in the substation.     

我国超高压隔离开关的发展和水平

35年来,我国363、550、800kV超高压隔离开关,伴随着我国超高压电网的快速扩大而蓬勃发展,与跨国公司产品形成一股抗衡力量,抵挡了大批进口产品,推动了我国超高压电网建设的国产化进程,捍卫了民族工业的发展,将永远载入中国电力发展的史册。     

特高压火爆中的冷思考

2005年前后,自国家电网公司提出建立特高压电网以来,现在已进入实施阶段.围绕特高压的争论是沸沸扬扬,围绕特高压市场人们又津津乐道,在火爆声中.更应该深入的思考.     

Electromagnetic noise spectrum caused by partial discharge in airat high voltage substations

The authors investigated the characteristics of the electromagnetic spectrum caused by partial discharges (PDs) in air at three different types of high-voltage substations. From the measured results, they characterized the electromagnetic noise spectrum depending on the type of substation. They also measured the long-term change of the average gain of the noise spectrum and discussed the influence of atmospheric conditions on the results. Moreover, they introduced the “equivalent charge (q_e)” which was derived by converting the electric field strength estimated from the average gain into the charge magnitude of PD. They also proposed a “phase gate control method” for better understanding the electromagnetic noise spectrum characteristics and the mechanism causing electromagnetic waves from PDs     

Prediction and improvement of the electric field distribution in high voltage AC substations

Various full-scale and model-scale measurements of electric field effects in several 330 and 500 kV AC substations are reviewed. Statistical analysis of the test results is recommended. The accuracy of model-scale measurements is satisfactory for engineering requirements. Model-scale measurements and analytical calculations of the electric field effects are analyzed and used in order to predict the electric field related performance of AC substations in the design phase.     

降低高海拔地区超高压变电站电晕技术

为降低高海拔超高压变电站电晕噪声,减少电晕引起的电能损耗和电晕噪声对环境的污染,延长设备检修周期和使用寿命.通过对高海拔地区已运行的超高压750kV变电站电晕情况调研分析,提出降低电晕的技术措施和方法:从设备、设计、金具制造和包装运输、施工各环节同时进行控制,在西宁750kV变电站工程(海拔2630m)建设中实施应用,降低电晕噪声效果显著.电晕噪声较750kV官亭变电站(海拔1890m)降低7.8 dB.实现了海拔高度增加电晕噪声降低的目的.     

Generalized charge simulation method for the calculation of the electric field in high voltage substations

This paper deals with the calculation of the electric field strength in high voltage (HV) substations comprising complex geometrical structures. Generalized charge simulation method is proposed for improving the precision of the calculation of the electric field strength. The objective of this analysis is to examine the influence of towers, HV apparatus and fences on the spatial electric field distribution. For this purpose, a three-dimensional generalized model of HV substation has been developed, including phase conductors, bypass busbars, HV apparatus, fences and towers (denoted as Full model). The obtained results of the calculation of the electric field strength are compared with the Simplified model, which only includes phase conductors connected to HV network. Verification of the proposed Full model performed by comparing the calculated and in-field measured values of the electric field strength within HV substations and in their vicinity gives very promising results.     

变电站电压和无功功率调节分析

电压和无功功率控制的研究是电网规划和系统运行所面临的重要课题。通过对集中控制和分散控制这两种自动控制方式的具体分析,根据地区电网的实际运行需要,提出变压器和电容器分阶段参与调节、电压网损分级优化的思想,针对现有变电站电压无功控制九区图的特点和三线圈变压器与两线圈变压器的不同,提出了改进措施。