基于CPLD编解码措施的断路器触发可靠性设计.doc

PAGE 摘 要 真空断路器是电力系统中压开关领域的主流产品，其操动机构的可靠性已经引起人们的高度重视。永磁操动机构因体积小、零部件少、结构简单，使操动机构发生故障的概率大大降低。它的出现为提高断路器的可靠性，进而实现操作控制提供了条件。 本文着重研究了真空断路器的可靠性控制。首先，分析了真空断路器对操动机构的要求，从永磁操动机构的特性出发，讨论了典型的永磁操动机构的结构和工作原理，为实现控制奠定了理论基础。其次，在分析理论的基础上，提出了真空断路器硬件控制系统的设计，并详细介绍了利用EPM7064的编解码措施来提高永磁操动机构分合闸操作的可靠性。最后，文章根据永磁操动机构的工作特点与系统性能要求，综合硬件与软件两个方面，进行了控制系统抗干扰的改进工作，寻求更加稳定、可靠的软硬件实现技术。 本文从硬件系统和软件系统两个方面对永磁操动机构整个控制系统进行了介绍。硬件部分主要有电源模块、手动控制单元、通信模块、数据处理模块、分合闸线圈驱动模块等五个单元模块;软件部分则将程序分成主模块、CPLD编解码模块、数据处理模块和通信模块四个模块进行模块化的程序设计。通过实验本文研制的智能控制器可以实现手动控制、PC机远程控制等功能，并总结了在研究和实现控制装置可靠性过程中得到的一些设计经验和设计方法，并对研制的控制软硬件存在的不足进行了分析，本文设计对真空断路器控制具有一定的实用价值。 关键词：断路器；永磁操动机构；分合闸控制；编解码；可靠性 Abstract As a popular component of middle-voltagecircuit-breakers, the reliability of its actuator is very important. As a new kind of actuator of circuit breaker, permanent magnetic actuator (PMA) has many advantages, such as, less parts, higher reliability, no maintenance and so on. It provides hardware basement for enhancing stability of breakers and also can be used to realize intellectual control. Focuses is placed on the reliability of the vacuum circuit breaker control in this paper. First of all the requirements for the the actuator of vacuum circuit breaker were analysised. Typical permanent magnetic actuator of the structure and principle are discussesed, according to the characteristics of permanent magnet actuator,which provided a theoretical foundation for control. Then based on the theory analysis on the vacuum circuit breaker, the hardware control system design, coding and decoding using EPM7064 measures are adopted to improve the permanent magnetic actuator operation reliability.At last, considering the work characteristics and system performance requirements for permanent magnetic actuator, integrated hardware and software aspects, and the control system in anti-interference were improved, thus one way to seek more stable and reliable hardware and software implementation techniques can be achieved. Both hardware and software syst