在石油化工企业中，线路的电压损失计算主要用于校验供电线路在正常运行时、电动机起动时母线压降及电动机的端电压，必要时还要校验二次回路的压降计算。章通过对线路电压损失的详细计算，在满足各项电气技术要求的条件下，通过方案投资的对比，确定更为可行的设计方案，即提高线路电缆截面，减少供电线路的损失，使工程投资更为合理。%In petrochemical enterprises, the voltage loss calculation is used to check the bus voltage loss and motor terminal voltage when feed line normal running or motor starting .At the same time, voltage loss of control circuit should be confirmed. In this paper, by means of detailed calculation based on line voltage loss, under the condition of meeting the requirements of various technical parameters, more feasible design scheme was determined through the comparison of project investment, namely improving the line cable section to reduce the voltage loss and make the project investment more reasonable.
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