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1、. . 山东农业大学毕 业 论 文基于调匝式消弧线圈的控制器设计 院 部 机械与电子工程学院 专业班级电气工程及其自动化4班 届 次 2015届 学生姓名 李 军 学 号 20113585 指导教师 刘莫尘 二一五年六月一日装订线. . . 目录摘要IAbstractII引言11 消弧线圈装置发展概况21.1中外研究情况21.2分类与特性分析31.3当前的缺陷与不足41.4本文的主要内容42消弧线圈的工作原理42.1中性点运行方式42.1.1大电流接地系统52.1.2小电流接地系统62.2电网调谐系统分析72.2.1非接地故障时调谐分析72.2.2单相接地时调谐分析83调匝式消弧线圈系统分析设
2、计83.1设计动机93.2 系统设计93.2.1 设计目标93.2.2系统结构93.3消弧线圈容量的计算103.4阻抗三角形法测电容电流103.5确定脱谐度和阻尼率113.5.1确定阻尼率123.5.2确定脱谐度124控制器硬件设计124.1控制器原理124.2 工控机134.2.1 工控机结构134.2.2 工控机的型号144.3数据采集卡144.3.1采集卡型号144.3.2模数转换模块154.3.3 存储器164.4显示屏选型164.5 输入输出信号的调理174.5.1模拟量输入调理174.5.2开关量处理194.6连接器选型225 控制器软件设计235.1控制器算法235.1.1离散傅
3、里叶变换235.1.2算法优化245.2软件流程图设计245.2.1初始化245.2.2控制主设计245.2.3状态自检255.2.4 档位调节276 结论28参考文献29致 谢30ContentsAbstractIIIntroduction11Development of arc suppression coil device21.1 Foreign research situation21.2Classification and characteristic analysis31.3Current defects and deficiencies41.4The main content o
4、f this paper42Working principle of arc suppression coil42.1Neutral point operation mode42.1.1Large current grounding system52.1.2Small current grounding system62.2Analysis of power network tuning system72.2.1Tuning analysis for non earth fault72.2.2 Analysis of single phase to ground83 Design and an
5、alysis of the system of the arc suppression coil with the turn - turn type83.1Design motivation93.2 System design93.2.1 Design target93.2.2 System structure93.3Calculation of capacity of arc suppression coil103.4Capacitance current measured by impedance triangulation103.5Determine the degree of de h
6、armonic and damping rate113.5.1Determine damping rate123.5.2Determine the degree of de - harmonic124Controller hardware design124.1Controller principle124.2 IPC134.2.1Industrial computer structure134.2.2 Model of industrial computer144.3Data acquisition card144.3.1Card type144.3.2Analog to analog mo
7、dule154.3.3 Memory164.4Screen selection164.5Conditioning of input and output signals174.5.1 Analog input conditioning174.5.2Switching quantity processing194.6Connector selection225 Controller software design235.1 Controller algorithm235.1.1Discrete Fu Liye transform235.1.2Algorithm optimization245.2
8、Software flow chart design245.2.1Initialization245.2.2Control master design245.2.3 State self check255.2.4 Profile adjustment276 Conclusion28References29Acknowledgement30iv基于调匝式消弧线圈的控制器设计李军(山东农业大学 机械与电子工程学院 泰安 271018)摘要:本文首先着眼于中性点不同运行方式和各类消弧线圈的分析研究,后在对基于调匝式调节原理的消弧线圈结构和工作方式研究的前提下,进行了其有关控制器的设计。根据实用性的要
9、求,对整套控制系统进行了选定设备型号;设计预实现功能;确定线圈容量、阻尼率、脱谐度等具体参数。通过阻抗三角形法测电容电流,使系统实现对电容电流的瞬时监控,控制器通过分接档位改变线圈的电感数值大小,进而保证残流值在允许范围内。工业控制用计算机与数据采集卡是控制器的主要部件,在设计的调理电路里,分别使用精密互感器和继电器作为输入和输出的执行部分。最后设计完成系统的软件部分,以实现完整的控制功能。关键词:消弧线圈 控制器 中性点 电容电流Controller design of the arc suppression coil based on the turn - turn typeLi Jun(
10、Mechanical & Electrical Engineering College of Shandong Agricultural University, Taian, Shandong 271018)Abstract:This paper firstly focus analysis of arc suppression coil neutral point in different operation modes and all kinds of disambiguation, in under the regulation of adjustable turns type base
11、d on the principle of eliminating arc suppression coil structure and working mode of the premise, the design of the controller.According to the practical requirements, the whole control system of the selected device types; pre designed function; determine the coil capacity, damping ratio, removal of
12、 specific parameters of the harmonic degree.Through the method of impedance triangle measuring capacitive current, allowing the system to achieve the capacitive current of instantaneous monitoring, controller through the points after gear change the coil inductance value so as to guarantee the resid
13、ual current value in the allowable range.Industrial control computer and data acquisition card are the main component of the controller, in the design of signal conditioning circuit, respectively, using precision transformer and relay as part of the implementation of input and output.At last we desi
14、gnthe software part of the system,toachievecompletecontrol function.Keywords:Peterson coil;controller;neutral point;capacitive currentII引言从改革开放到现代工业和经济迅猛发展的今天,我国电力系统经历了滚雪球式的快速扩展,不仅用电设备和用电量与日俱增,同时还对电力系统运行和电能质量提出了更为严苛的要求。保证可靠地持续供电作为电力系统运行的第一要义,正越来越受到人们的关注。根据数理统计显示,接地故障发生概率非常高,其中仅单相接地短路故障就已经占到了高压输电线路故障的七成之多,并且它往往是其它电力故障的诱因,已经可以严重威胁到电力系统的安全运行。电网系统一旦发生故障,轻则停电造成工厂减产,使人民日常生活遭受不必要的困扰和影响;重则将造成人身事故,重要生产设备损毁,甚至使生产秩序长时间不可恢复,人民生活发生混乱进而激发政治性问题。由此可见,研究接地保