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设计建设一座110kV变电站,首先,根据主接线的经济可靠、运行灵活的要求选择各个电压等级的接线方式,在技术方面和经济方面进行比较,选取灵活的最优接线式。其次进行短路电流计算,根据各短路点计算出各点短路稳态电流和短路冲击电流,从三相短路计算中得到当短路发生在各电压等级的工作母线时,其短路稳态电流和冲击电流的值。最后,根据各电压等级的额定电压和最大持续工作电流进行设备选择,然后进行校验。
本文主要是关于110kV变电所电气一次部分进行设计,内容包括主变台数、型号和容量的合理选择、各个电压等级接线方式的最优选择、短路电流的计算、根据各个等级的额定电压和最大持续工作电流进行设备选择以及最后的校验工作.
关键词：电气设计；电流计算；电气设备
Design and construction of a 110 kV substation, first of all, according to the economic reliability of the main wiring, flexible operation requirements to select the wiring mode of each voltage grade, in the technical and economic aspects of comparison, select flexible optimal wiring type. Secondly, the short-circuit current is calculated, and the short-circuit steady-state current and short-circuit impulse current are calculated according to each short-circuit point. The value of short-circuit steady-state current and impulse current is obtained from the three-phase short-circuit calculation when the short-circuit occurs in the working bus of each voltage grade. Finally, the equipment is selected according to the rated voltage of each voltage grade and the maximum continuous working current, and then checked.
kV paper is mainly about the design of the electrical primary part of the 110 substation, which includes the reasonable selection of the number, model and capacity of the main transformer, the optimal selection of the wiring mode of each voltage grade, the calculation of the short circuit current, the selection of the equipment according to the rated voltage of each grade and the maximum continuous working current, and the final check work.
Keywords: electrical design; current calculation; electrical equipment
目 录
5.2.2 计算各回路电抗（取基准功率Sd = 100MVA Ud=UaV）16
7.1.2根据测量仪表的配置原则变电所的测量仪表配置如下：34
