津秦客运专线10 kV供配电系统采用全电缆电力贯通线路,电缆线路中的电容电流会使贯通线末端电压升高并产生过量容性无功,通过分析、仿真和测试,对津秦客运专线的电容电流补偿方案进行验证,全电缆供配电系统系统中性点采用经过小电阻接地方式,采用沿线设置固定电抗器补偿和变、配电所内分组投切电抗器补偿相结合的容性电流补偿方法,再加上有载调压器的配合,可使供电电压水平和功率因数达到设计要求,获得良好供电指标。

Electric run-through line with full cable was employed in the 10 kV power supply and distribution system of Tianjin-Qinhuangdao railway passenger-dedicated line. However, the capacitive current in the cable line may cause voltage rising at the end of the run-through line and may cause overmuch capacitive reactive power. For that reason, this paper verified the compensation scheme of capacitive current for Tianjin-Qinhuangdao railway passenger-dedicated line by means of analysis, simulation and testing. Meanwhile, the neutral point of the power supply and distribution system with full cable was earthed via the low resistance; the fixed electric reactor compensation along the railway was combined with the electric reactor compensation in the form of group switching within the substations and distribution substations, so as to do compensation of capacitive current; and all the measures were cooperated by on-load voltage regulators. It is concluded in this paper that by the use of solution

电力贯通线路为铁路沿线信号和通信设备提供稳定电源,其安全稳定工作具有重要意义,而并网倒闸是保证电力贯通线路安全稳定工作的重要措施之一,但国内外关于铁路领域全电缆电力贯通线路能否并网倒闸并无定论。本文在电缆线路特性研究的基础上,对宁海到临海配电所区段全电缆电力贯通线路及其沿线负荷进行建模仿真,并根据现场全电缆贯通线路限流和线路过负荷保护整定要求,通过仿真计算得到该区段的并网倒闸技术条件,最后利用现场试验对仿真结果给予验证。结果表明,当保证并网电源之间的相位差在20°以内,或者电压幅值比不大于20%,均可实现安全并网。该结论可以为电力贯通线路设计与施工提供技术参考。

Stable power is required to be supplied to signalling and communication appliances and equipment a-long a railway line through power transfixion lines , so safe and stable operation of the power transfixion lines is of great importance . Grid-connected switching is one of the main measures to guarantee safe and stable oper-ation of power transfixion lines ,however ,whether this measure is eligible for all-cable power transfixion lines has not come to conclusion at home and abroad . In this paper , on the basis of research of characteristics of ca-ble power transmission lines , the all-cable power transfixion lines and the loads along the lines between the Ninghai and Linhai Distribution Substations were modelled ;conforming to the on-site requirements for limited currents and setting values of overload protection and taking advantage of simulation and calculation by Soft-ware PSPICE , the technical conditions for grid-connected switching in the Ninghai-Linhai District were found and th

本文分析电力勘察设计企业转型升级需求，结合大数据技术的发展，提出以“数据”管理为核心，以“数据的横向集成、竖向贯通”为指导，以实现“全工程数据全寿命周期管理”为发展目标的信息化建设思路。详细介绍了依据“数据”为核心的企业信息化实际建设内容。

This paper analysis the need of electric power design enterprises when they transformation and upgrading, combine the development of big data, propose new ideas about information construction——with a kernel of data center ,using the landscape orientation integrate of data and the vertical penetration to guide to achieve the goal about the life cycle management of the whole project-database. This paper introduce the content about the information construction within the core data in details.

以新建北京至石家庄客运专线石家庄新客站为例,针对供配电系统的可靠性,对大型铁路客站的负荷特征、外部电源选择、备用电源设置、系统主接线方案、SCADA系统的监控范围、通信信号等特别重要负荷的供电方式等问题进行分析。分析研究表明:现行TB 10008-2006《铁路电力设计规范》中的负荷分级、一级负荷的供电方式、特大型客站第三路电源的要求等内容与大型铁路客站的重要性和可靠性要求已经不相适应,笔者对其相关内容提出了修改意见加以完善。铁路通信、信号等特别重要负荷的可靠性与高速铁路的安全运营直接相关,其应急电源选择,铁路贯通自闭线路电源与自备柴油发电机相比较仍然具有明显优势,在条件允许的情况下应当优先使用贯通自闭线路电源,以确保其严格的可靠性要求。

In order to illustrate the reliability of power supply and distribution system,the paper analyzes the load charac-teristic of large railway station,the external power supply selection,the backup power settings,the system main connec-tion scheme,the monitoring area of the SCADA system and the power supply method for communication signal.The new Shijiazhuang Railway Station,a station for the new passenger line from Beijing to Shijiazhuang,is given as an example in this paper.The analysis result shows that:the TB10008 -2006 load classification,first class load power supply,large third-way power passenger stations and other content requirements are not suitable for the large railway station,especially in the importance and reliability.The paper presents a revised and improved view.The important load such as railway communication or signal is directly related to the safe operation of high-speed train.The railway line through automatic blocking circuit power has obvious advantages to the sel