石碣镇110kV变电站电气部分设计

石碣镇110kV变电站电气部分设计摘要国民经济的快速发展带来了对电力可靠性的更高要求，因此合理的变电站设计成为至关重要的一环。根据任务书的要求和电气知识，论文展开了变电站设计的全面工作。首先，论文进行了负荷计算，这一步骤非常重要，它确定了主变台的数量和型号。主变选用SSZ9-20000kVA/110kV型号的变压器，台数为两台。这是电站设计的基础，决定了电力系统的容量，以满足国家和地区的用电需求。其次，论文进行了一次主接线设计，覆盖了110kV、35kV和10kV侧的接线方式。110kV侧采用了双母接线，35kV侧和10kV侧采用了单母分段接线。这确保了电能的顺畅传输和分配，最大程度地减少了能量损失，提高了电力传输的效率。接下来，论文进行了短路电流计算，计算出短路电流和最大冲击电流。其次进行了主要电气设备的选型和校验，选择合适的断路器，隔离开关，电流互感器，电压互感器。这为电气设备的选型和保护计算提供了重要的依据。这确保了变电站在面对故障时能够快速切断故障点，保护设备和人员的安全。最后论文选择了合适的电气设备型号，设计了防雷和接地系统，最终完成了论文的撰写。这些工作的综合完成，确保了变电站的可靠性和安全性，为国民经济的可持续发展提供了强大的电力支持。关键词：110V:变电站电气部分设计：短路电流计算；设备选型AbstractThe rapid development of the national economy has brought higher requirements forpower reliability,so reasonable substation design has become a crucial part.According tothe requirements of the task book and electrical knowledge,the paper has carried outcomprehensive work on substation design.Firstly,the paper conducted load calculation,which is very important as it determinesthe number and model of the main transformer.The main transformer adopts the SSZ9-20000kVA/110kV model transformer,with two units.This is the foundation of power plantdesign,determining the capacity of the power system to meet the electricity demand of thecountry and region.Secondly,the paper conducted a main wiring design,covering thewiring methods on the 110kV,35kV,and 10kV sides.The 110kV side adopts double busconnection,while the 35kV and 10kV sides adopt single bus segmented connection.Thisensures smooth transmission and distribution of electrical energy,minimizes energy loss,and improves the efficiency of power transmission.Next,the paper calculated the short-circuit current and maximum impulse current.Secondly,the selection and calibration of themain electrical equipment were carried out,selecting appropriate circuit breakers,isolatingswitches,current transformers,and voltage transformers.This provides an important basisfor the selection and protection calculation of electrical equipment.This ensures that thesubstation can quickly cut off the fault point in the face of faults,protecting the safety ofequipment and personnel.Finally,the paper selected appropriate electrical equipmentmodels,designed lightning protection and grounding systems,and completed the writingof the paper and the use of AutoCAD for drawing.The comprehensive completion of thesetasks ensures the reliability and safety of the substation,providing strong power support forthe sustainable development of the national economy.Keywords:110kV;Design of electrical components for substations;Short circuit currentcalculation;Equipment selection乡目录原创性声明摘要Abstract....1绪论1.1课题研究背景与意义1.2国内外研究现状21.3本文主要研究内容….32负荷计算与主变选型.42.1待建变电站现状.…42.2负荷计算义2.2.135kV侧负荷计算..52.2.210kV侧负荷计算52.2.3低压侧负荷计算」.52.3无功补偿..62.4主变设计与选型..82.4.1主变容量的选择……82.4.2相数的选择82.4.3绕组数的选择.92.4.4绕组联结方式的选择.92.4.5调压方式的选择.…102.4.6主变型号的选择.103.电气主接线设计.ll3.1110kV主接线设计.113.235kV主接线设计133.310kV主接线设计153.4主接线选择164.短路电流计算…18