一、概述: 近年来,我国电力系统单机容量逐渐增大,相应热力调节系统亦越来越复杂,对自动化要求逐步提高。因之,采用热控仪表水平不断提高。以集成电路为基础组装式仪表陆续代替分立元件的电动单元组合仪表。这不仅扩大了仪表的功能而且由此可以构成复杂的,较完善的自动调节系统,使自动化水平提高一大步。最近20万瓩,30万瓩机组热控设计方案又有新的动向。在控制上采用了数字式单回路调节器,在监测上采用了国产化微机数据采集装置。这种方案并未使数字式仪表充分发挥它的能力。最大缺陷是控制、监视、操作功能分离。数字式单回路调节器不能与国产微机数据采集装置通信。只能起模拟调节 I. Overview: In recent years, the stand-alone capacity of China’s power system has been gradually increased, the corresponding thermal regulation system has become more and more complex, and the requirements for automation have gradually increased. Therefore, the use of thermal control instrumentation level continues to increase. Integrated circuit based on the assembly of instruments to gradually replace the discrete components of the electric unit instrument cluster. This not only expands the functionality of the instrument but also makes it possible to compose complex, well-developed automatic adjustment systems, a major step forward in automation. The recent 200,000 瓩, 300,000 瓩 thermal control unit design has another new trend. In the control of the use of a digital single-loop regulator, monitor the use of domestic computer data acquisition device. This solution does not give full play to the capabilities of digital instrumentation. The biggest flaw is the control, monitoring, operational separation function. Digital single-loop regulator can not communicate with domestic computer data acquisition devices. Can only play simulation adjustment