基于MODBUS现场总线的断路器

发布时间：2018-06-02 14:11

本文选题：断路器 + 现场总线　；参考：《南京邮电大学》2014年硕士论文

【摘要】：随着电力技术的发展和用户需求的不断提高,配电行业对电器性能的要求越来越高,要求带通讯功能的电器以实现配电网络的遥控、遥测、遥调和遥讯的“四遥”功能。从目前国际上低压配电的发展来看,低压配电系统通过现场总线实现网络化成为一种新的发展趋势。世界各大公司如通用电气公司、施耐德电气公司、西门子公司、ABB低压电器公司等都已经开发或使用了基于Modbus的配电系统。因此开发基于Modbus现场总线的智能型断路器是市场发展的需求,对配电系统网络化有着举足轻重的意义。与传统可通讯断路器相比,它不仅具有传统可通讯断路器的一切功能,而且进一步与操作终端、上层控制管理网络连接与信息共享。本文首先分析了现场总线的应用现状,对Modbus现场总线技术进行了介绍,分析了智能配电控制系统的发展趋势。本文用单片机C51配合外围电路实现控制器的硬件电路,用VC++6.0编制动态连接库(.DLL文件)实现与断路器通讯并实现与《组态王》软件的接口,组态软件调用动态连接库实现与断路器的数据交换。其次,由于MODBUS现场总线采用RS485通信接口,这是一种低成本的联接方案,可以极大地减少线路联接的复杂性,避免现场可能的各种电磁干扰对控制设备的影响。本文给出了控制器硬件系统结构,分别介绍了系统通讯接口模块、上位机用组态软件对现场的断路器进行控制,实现了上位机与控制器的Modbus现场总线连接。本文通过基于Modbus协议的下位机软件并与《组态王》软件开发的上位机软件进行动态连接,实现了基于Modbus现场总线技术在断路器。为以后开发其它现场总线的断路器奠定了基础。最后,通过上位机与控制器通信的测试,验证了基于Modbus现场总线技术在断路器的实现。
[Abstract]:With the development of electric power technology and the continuous improvement of users' demand, the electric equipment with communication function is required to realize the functions of remote control, telemetry, telecontrol and telecontrol in the distribution industry. According to the development of low voltage distribution in the world, it is a new trend to realize the network of low voltage distribution system through field bus. Major companies in the world, such as General Electric, Schneider and Siemens, have developed or used distribution systems based on Modbus. Therefore, the development of intelligent circuit breakers based on Modbus fieldbus is the demand of market development, and plays an important role in the network of distribution system. Compared with the traditional communication circuit breaker, it not only has all the functions of the traditional communication circuit breaker, but also connects with the operation terminal, the upper control management network and the information sharing. In this paper, the application status of fieldbus is analyzed, the technology of Modbus fieldbus is introduced, and the development trend of intelligent distribution control system is analyzed. In this paper, the hardware circuit of the controller is realized by the cooperation of the MCU C51 with the peripheral circuit, and the dynamic link library (DLL file) is programmed by VC 6.0) to realize the communication with the circuit breaker and the interface with the software "Kingview". The configuration software calls the dynamic connection library to realize the data exchange with the circuit breaker. Secondly, because the MODBUS fieldbus uses RS485 communication interface, it is a low-cost connection scheme, which can greatly reduce the complexity of the line connection and avoid the influence of various possible electromagnetic interference on the control equipment. In this paper, the hardware system structure of the controller is given, and the communication interface module of the system is introduced respectively. The upper computer controls the circuit breaker in the field with configuration software, and realizes the connection between the upper computer and the Modbus field bus of the controller. In this paper, the lower computer software based on Modbus protocol is dynamically connected with the upper computer software developed by Kingview software, and the circuit breaker based on Modbus fieldbus technology is realized. It lays a foundation for the development of other fieldbus circuit breakers in the future. Finally, through the test of communication between host computer and controller, the realization of circuit breaker based on Modbus fieldbus technology is verified.
【学位授予单位】：南京邮电大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM561;TP273

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