论文部分内容阅读
1 引言目前常见的过流继电器属机械型或固态型.机械继电器需定期维护和校准,而固态继电器容易遭受噪声干扰.这些继电器体积大,安装后缺乏灵活性.曾有人使用一种专用的微处理器来实现继电器的控制功能.AI-Nema 等提出一种专用各自独立的微处理器,实现每个过流继电器的功能.Manzoul 提出了用一种专用微处理器,实现4个继电器的控制功能.在这些方法中。微处理器是依靠其它的外设实现记忆和 I/O 操作,并不向操作者提供有关继电器系统条件的信息.此外,在上述几种方法中,没有一种方法能提供实现数百个过流继电器。并由中央控制室对它们进行监测和控制.本文介绍一种能在
1 Introduction At present, common over-current relays are of mechanical type or solid-state type, mechanical relays need regular maintenance and calibration, and solid-state relays are easily subjected to noise interference. These relays are bulky and lacks flexibility after installation. Processor to achieve the relay control functions.AI-Nema proposed a dedicated dedicated microprocessor, each overcurrent relay function.Manzoul proposed a dedicated microprocessor, the realization of the four relay control Function in these methods. Microprocessors rely on other peripherals for memory and I / O operations and do not provide the operator with information about the conditions of the relay system. In addition, none of the above approaches provide a Flow relay. They are monitored and controlled by the central control room