大机组6kV厂用系统二次线设计改进

近年来，新建或扩建电厂设计中越来越多的大机组工程考虑电气设备全面采用计算机监控，其中重要一环就是将厂用电源系统由常规控制纳入分散控制系统(DCS)监控。根据这一新的变化并结合正在进行的广安电厂(2x300MW)二期扩建工程设计实践提出了大机组电气设备全面采用计算机监控后6kV厂用系统电气二次线设计的几点改进意见，以期对同类工程设计有所参考。

Several design improvements on secondary line of 6kV auxiliary power supply system for large generator units

Recently, in design of new or expansion construction of power plant, the more and more projects of large generator units fully adopt computer monitoring for electric equipments, in which the important role is from the conventional control to DCS monitoring for auxiliary power supply system. According to the new changes combined with second stage expansion project design (2x300 MW) to be implemented for Guangan power plant, the paper presents several design improvements on secondary line of 6 kV auxiliary power supply system after fully adopting computer monitoring for large generator units, and gives a reference to the same kind of project design.