具有黑启动功能的液化天然气一体化厂用电方案

An Liquefied Natural Gas-Integrative Auxiliary Power Scheme with Black Start Function

针对液化天然气(liquefied nature gas,LNG)接收站-发电厂一体化项目,提出当其作为黑启动电源点时,厂用电系统的配置原则和具体方案。首先,对黑启动过程中的负荷变化进行数学模拟及计算,整合负荷变化参数,并以此为基础展开分析。经过理论分析及推导,得出将柴油发电机作为机组黑启动的启动电源,黑启动电源与保安电源统一配置,系统配置采用中低压相结合的原则。其次,根据理论分析结果构建2种不同接线方案,并结合黑启动负荷模型进行数学计算。最后,通过技术经济对比可知,采用全厂黑启动柴油机组统一设置的方案具有装机容量较少、可靠性较高、操作较便捷、运行维护更经济的特点。

In allusion to situation that the item of power plant integrated with liquefied natural gas(LNG)terminal was used for a black start resource,the configuration principle of auxiliary power system and its concrete project were put forward.Firstly,the load variation during the black start process was mathematically simulated and calculated and the parameters of load variation were integrated,and on this basis the analysis was preceded.After theoretical analysis and derivation the principles,such as the diesel generator was used as the start power supply for the black start,the black start power resource and the emergency power supply were uniformly configured and in the system configuration the of middle-voltage devices were uniformly combined with low-voltage devices,were determined.Secondly,according to the results of theoretical analysis two different wiring schemes were constructed,and combining with the load model of the black start the mathematical calculation was implemented.Finally,it could be known from the technoeconomic comparison that there were such features as less installed capacity,higher reliability,easy to operate,more economic to operate and maintain if the uniformly set black start diesel motor sets were adopted.