国产分散控制系统的可靠性实现技术  

Implementation of Reliability Technologies for Domestic Distributed Control System

作　　者：牛海明[1] 张洪敏[1] 

机构地区：[1]北京国电智深控制技术有限公司,北京102200

出　　处：《中国电力》2016年第11期100-104,共5页Electric Power

基　　金：国家科技支撑计划重点资助项目(2012AA0411B06)~~

摘　　要：分散控制系统(distributed control system,DCS)的稳定运行依赖于其高度的可靠性。针对大容量火电机组的工艺对象特点和控制技术要求,为提高分散控制系统可靠性,提出了实现广义可靠的三原则,即预防为主、弱化影响和在线维修三原则,从系统的网络通信、硬件性能、电源供应、功能预警、软件优化和工程设计方面讨论了三原则的实现方法、原理及具体措施。其中双网双发的通信方式提高了工作链路故障时的系统容错性;公用系统冗余供电方案提高了公用系统的电源可靠性设计;标准化的算法设计规范了软件使用,实现了故障时安全动作。以此整体解决思路设计的1 000 MW等级超(超)临界火电机组控制系统在某大型机组实现了成功应用,通过了恶劣实验的检验和长期运行的考验,可以实现广泛推广。The steady operation of distributed control systems （DCS） is highly dependent on the system reliabilities. In order to enhance the reliabilities of the DCS system, this paper proposes three principles, i.e., preferential prevention, weakening impact and online maintenance, for the implementation of generalized reliability technologies based on the technical characteristics and control requirements of large thermal power generation units. According to these principles, the realization methods, principles and specific measures are discussed accordingly in the aspects of network communication, hardware performance, system power supply, early-warning tunction, software optimization and engineering design. To be specifically, the duplicate communication packets through duplex network can improve the fault tolerance of the system, while the redundant power supply plan can improve the power supply reliability design and the standardized algorithm can normalize the software utilization and realize safe actions during faults. In addition, the DCS system designed with these technologies has been successfully used in a 1 000-MW class ultra-supercritical thermal power unit. It has passed the testing under extreme conditions and gone through long-term operation, thus can be popularized broadly.

关 键 词：超超临界发电机组 分散控制系统 可靠性 

分 类 号：TM621[电气工程—电力系统及自动化] TK39[动力工程及工程热物理—热能工程]