论文编号:JD1035论文字数:20353,页数:52
摘 要
在电力系统中,存在着CT与二次侧数据处理系统距离较远的情况，工程上常用的简便方法是通过导线连接直接传送CT二次侧电流,形成闭合回路,此方法尽管简单,成本低易于实现,但由于传送距离远.信号易被干扰,至使测量精度降低,并且若传输导线出现断路,将造成CT二侧开路,使电流信号传输中断,严重者使CT因二次侧开路而烧毁.为保证CT安全和数据可靠性,提出采用数字传输方法,设计出远程数据传送装置,该装置由发送和接收两部分组成.两部分之间利用无线数传。本装置即使传输线路中断也不会影响到CT,从而保证了CT 的正常运行.
给出了利用单片机无线数传通讯对电力系统CT二次侧电流进行远距离数字传送和接收的实用方案,使CT不会因为二次侧开路而烧毁,抗干扰能力强,测量精度高,并能够直接提供A/D转换结果,并还原信号,本装置适合应用于电力参数微机监控系统中.
关键字：单片机；无线数据通信；A/D；CT
Abstract
In the electrical power system, the CT is to be away from the far situation with two sides data processing system. In the project the common used simple method is through the wire coupling direct transmission CT,and the two sides electrical currents forms in the closed path. This method is free simple. The cost is low easy to realize, but because the transmits is too far. The signal is easy disturbed to cause the measuring accuracy to reduce. If the transmission wire presents abruption will create the CT two sides openings to causes the electric current signaling interrupt.The serious are to cause CT to burn down because of the two sides openings. In order to guarantee the CT security and the data reliably,that is used the proposed digital transmission method, The designed long range data transport unit, This equipment to by transmits and receives two parts of the composed between 0.2 parts to use without the line number biography. Even if this installment is transmission that the line interrupt will not affect CT, thus has guaranteed the CT normal operation gave passed on the communication which to used the monolithic integrated circuit without the line number to carry on the long-distance range digit transmission ,For received practical plan to the electrical power system ,the two sides electric currents of the CT is to cause CT not to burn down.Because of the two sides openings, antijamming ability, the measuring accuracy is high, and could provide A/D transformation result directly, which returned to original state the signal, This installment suited applies in the electric power parameter microcomputer supervisory system.
Key words: Monolithic integrated circuit; Wireless data communication; A/D; CT.
目 录
第1章 绪 论1
第2章 装置的总体设计方案2
2.1装置设计方案2
2.2装置的主要工作原理3
第3章 装置的硬件电路设计4
3.1 单片机控制模块介绍4
3.1.1 AT89S51单片机简介4
3.1.2 AT89S51单片机硬件结构及引脚功能5
3.1.3 数据存储器的外部扩展电路10
3.2 A/D电路设计10
3.2.1 TLC1543 A/D介绍10
3.2.2TLC1543与单片机接口电路11
3.3D/A电路设计12
3.3.1TLC5615 D/A介绍12
3.3.2复位方式15
3.4 无线数传模块17
3.5电量隔离传感器20
第4章 系统软件设计23
4.1 系统的软件实现23
4.2 系统流程图及程序23
第5章 结论31
参考文献32
致 谢34
附录Ⅰ外文及翻译35
附录Ⅱ原理图46
附 录Ⅲ元件清单48
CT二次侧数据采集与传送装置的设计......