发电厂低压柴油发电机配电系统短路电流计算

简述发电厂保安电源切换过程,明确保安母线段并联切换时发生短路。短路电流由柴油发电机系统短路电流、厂用电系统短路电流和电动机反馈电流组成,其较厂内其他电动机控制中心更大。此外,提出了发电厂低压柴油发电机配电系统短路电流计算方法,结合工程实例进行低压柴油发电机配电系统短路电流计算,并将其作为开关设备选型的依据。

数据中心20kV供配电系统及柴油发电机组的设计

在市场存在巨大需求和国家政策支持的双重利好下,近些年在全国掀起一股数据中心建设热潮。数据中心对供电可靠性和安全性要求比较高,特别是高等级数据中心,除常规配置双重10 kV市电电源外,还配置有多重后备保障电源(如柴油发电机组、UPS、EPS和高压直流等)。在国内部分经济较发达地区,出现不太常见的20 kV等级供电电压。将结合实际工程案例浅谈20 kV供配电系统在数据中心的应用,以及如何选择匹配的变压器和柴油发电机组的电压等级。

超高层建筑柴油发电机出口电压的选择

分析超高层建筑高区专用400V柴油发电机、高低区共用400V柴油发电机、高区专用10kV柴油发电机等几种情况下的线路末端电压偏差,为柴油发电机出口电压选择提供计算依据,通过实例说明适当的发电机负荷率有利于线路末端电压的提高。

Optimal Configuration for Distributed Generations in Micro-grid System Considering Diesel as the Main Control Source

This paper proposes an optimal configuration of the distributed hybrid renewable generations based on the stand-alone micro-grid system, considering the diesel as the main control source. Due to the natural sources and load of user changes randomly and the non-tinearity of the power output by renewable generations, an intelligent optimization method based on the improvement of the genetic algorithm and the control strategy are discussed. The instance analysis is compared with the optimization result of the hybrid system based on HOMER （hybrid optimization of multiple energy resources） and GA （genetic algorithm） method on Matlab software. The simulation result of the optimal configuration showed the new hybrid renewable system and would improve the power supply situation which decreased the cost of energy greatly compared with the conventional form of power supply system which was operated only by diesel. The conclusion of the comparing result between HOMER and GA method shows the advantages of the strategy for the diesel as main control sources.