低压断路器智能控制器设计与研究

【作者】 傅启国；

【导师】 姜建芳；

【作者基本信息】 南京理工大学 ， 控制理论与控制工程， 2008， 硕士

【摘要】 本文依托江苏某低压电器厂的万能式空气断路器的自动化设计开发项目,根据企业需求,针对原断路器功能单一,整定不方便,人机界面不友好,产品档次低等问题进行改造和重新设计,在保证断路器工作可靠性的同时,按企业要求进一步完善保护功能,提高断路器的自动化程度和智能化程度,同时尽可能降低产品成本,因此本文的研究内容具有一定的现实意义和应用前景。本文以TI公司的MSP430单片机和CPLD为核心研究设计了集测量、保护、监控、通信等功能为一体的智能控制器,并在充分研究测量算法和保护实现原理的基础上,采用模块化的程序设计方法进行软件设计。同时在硬件和软件设计上都采取了有效的抗干扰措施以提高智能控制器的抗干扰能力,保证断路器工作的可靠性。针对断路器的“四遥”通信功能要求,论文研究了在低压电器领域广泛使用的Modbus现场总线通信协议,提出了基于Modbus总线的智能控制器通信网络设计方案,实现了智能控制器和PC机的双向通信,有利于实现PC机对智能化断路器的集中监控和管理。更多还原

【Abstract】 The paper grounds on a design and development automation project of universal air circuit breaker of a low-voltage electrical plant in Jiangsu, and according to the enterprise’s demand mainly researches development and re-design of the original circuit breaker for the problems of unperfect function, inconvenient setting operatin and unfriendly man-machine interfaces, and researches how to keep reliability of the breaker, increase the level of automation and intelligence and simultaneously reduce the product cost as far as possible. So, this paper has certain practical significance and application prospect.Among this subject, the intelligent controller regards MSP430 MCU which TI Company produces and CPLD as the key procsssor. The intelligent controller incorporates the functions of measurement, protection, monitoring and communication. The paper discusses the software design of the intelligent controller based on the full study of arithmetic of measurement and principle of protection in the way of the modular design of software design. Meanwhile, the paper discusses the anti-jamming methods of both hardware and software to enhance anti-jamming ability of the intelligent controller, so as to ensure the reliability of the breaker.For the breaker’s "four remotion" communication requirements, the paper studies Modbus fieldbus communication protocol which is widely used in low-voltage electrical fields, and bring forward a plan of intelligent controller communication network based on Modbus fieldbus, which realizes the communication of intelligent controller and PC, and is good for the PC’s centralized monitoring and management to the intelligent breaker.更多还原