毕业设计论文-牵引所svc二次设计.docx

摘　　要由于目前电气化铁路牵引供电电能计量中力率的考核采用正送倒计的方式，若采用常规的固定电容进行无功补偿，其综合力率无法达到供电部门的要求，而静态无功补偿装置（SVC）能够很好的解决这一问题。本文正是针对静态无功补偿装置（SVC）的工程设计进行专题研究。本论文首先，针对电气化铁道牵引供电系统及其负荷的特点，分析了牵引供电系统功率因数低的原因，并提出应用静止型动态无功补偿装置(SVC)对牵引负荷进行动态无功补偿。其次，介绍了目前牵引供电系统中普遍应用的晶闸管投切电容器TSC和固定电容器+晶闸管可控电抗器FC+TCR两种SVC补偿装置；接着，对FC+TCR型SVC系统的一次接线方式进行简单介绍，提出了SVC装置在施工设计中应该注意的一些问题；最后，列举了110kV牵引变电所FC+TCR型SVC补偿装置二次系统设计，并进行保护定值计算。静止型动态无功补偿(SVC)装置采用大功率晶闸管调相技术，通过对补偿系统中的相控支路电流的调节，达到动态调节SVC装置输出无功的目的，使之适应动态补偿牵引变电所变化负荷的需要。本论文中的设计方法及经验值得设计和施工人员参考借鉴。关键词：电气化铁路；功率因数；SVC；FC+TCR；系统设计AbstractAt present because electrified railway traction power supply electricity measurement of the assessment using force rate was sending pour millions of the conventional way, if the fixed capacitance reactive power compensation, which are unable to achieve comprehensive force rate power supply departments requirement, and static var compensation device (SVC) can be good to solve this problem. This thesis is aimed at static var compensation device (SVC) engineering design keynote research.At first, this thesis mainly aims at electrified railway traction power supply system and its load characteristics, it analyzes the traction power supply system causes of low power factor, and put out the application of static var compensation device (SVC) for dynamic var compensation of tractions load. Secondly, the thesis introduces the current traction power supply system in general useing thyristor threw cutting capacitor TSC and fixed capacitors + thyristor controlled reactor FC + TCR two kinds of SVC compensation devices; After then, FC + TCR type SVC system once connection mode is simple introducted, and construction design device in an SVC is put forward some problems which should be paid attention to; Finally, the thesis cites FC + TCR type SVC compensation devices second system design of 110 kv traction substation, and protection setting value calculation.Static var compensation (SVC) device adopts high-power thyristor phase-modulation technology, it throughs to t