毕业设计（论文）备分励保持功能的DW450分励脱扣器设计.docxVIP

摘要电力产业快速发展，人们的生活越来越离不开电了，电力安全也变得十分重要。每天都有大量电器需要用电。这个时候必要的保护安全装置就显得格外重要，常用的保护装置有断路器，断路器最重要的元件之一就是欠压脱扣器，其作用关系着断路器是否可以有有效、精确的行动，来完成对线路的有效控制以及保护。DW45断路器作为一种新型的智能型的全能式断路器的产生，其智能化、通信能力强大、体积也不大，对电路短路故障的高识别能力以及全面的保护作用，使得其慢慢变成现代智能电网中配电的重要部分对线路的操控和保护，高可靠性，耗能低是当代脱扣器发展的方向。此次设计中选用PIC12F683微型单片机，也考虑到了此单片机的多种特性及功能符合设计要求。本次主要分励保持功能的脱扣器设计，针对高电压输入与长时间运行的特点，研究电路结构、成本低廉、可靠性高，且能实现欠压脱扣器的瞬时与延时脱扣的解决方案。在此方案，对主电路、微机电路和主控流程等主要的观点进行了探讨。侧重对硬件的设计，尽量对硬件电路进行模块化，接着对硬件电路的各块进行调试以及仿真。再就选用的单片机，设计与调试软件程序部分。最后结合以上两部分的设计，在系统开发软件上调试。关键词：分励欠压脱扣器；电路设计；单片机；仿真和调试Abstract The rapid development of power industry, power security has become very important. Trip device in the role of low-voltage circuit breaker is very important, the relationship between the quality of the circuit breaker can be accurate and effective action to achieve the line control and protection. One of the most important components of a circuit breaker is an undervoltage release which has a bearing on whether the circuit breaker can perform effective and precise actions to achieve effective control and protection of the line. DW45 circuit breaker as the universal type breaker is a new type of intelligent production, its intelligent, strong communication capability, the volume is not large, high recognition ability of short circuit fault and the protective effect of comprehensive, which gradually became the main part of the modern distribution in smart grid.High reliability, low energy consumption is the development of the current release direction.The design of the use ofPIC12F683 ,but also taking into account the various characteristics of single-chip microcomputer and functions, in line with the design requirements. According to the current electromagnetic tripping mode of DW45, a new scheme based on capacitor buck, capacitor charging and discharging is put forward. Then, the main viewpoints of main circuit, microcomputer circuit and master control flow are discussed. Focus on the design of the hardware, as the hardware circuit into pi