基于事故安全设计的开关量输出控制单元  

DIGITAL OUTPUT MODULE BASED ON FAIL-SAFE DESIGN

作　　者：唐晓泉[1] 李璇华[1] 黄益庄[1] 张楠[1] 

机构地区：[1]清华大学电机系,北京市100084

出　　处：《电力系统自动化》2002年第9期63-65,共3页Automation of Electric Power Systems

摘　　要：事故安全设计是增强系统可靠性的一种新理论方法。根据这一理论并结合继电保护的特点 ,文中提出了一种设计微机保护装置开关量输出控制单元的新方法 ,该方法利用互补逻辑网络自检测方法来实现开关量输出控制单元的事故安全。基于事故安全设计的开关量输出控制单元最显著的特点在于它在执行 CPU的开关操作指令之前还要校核其指令的正确性 ,一旦该单元检测出CPU因故障而发出的错误开关操作指令 ,就立即将其输出锁定在特定安全状态 ,从而降低了保护装置的误动 。The fail- safe design is an advanced theory of the enhancementof system reliability.By incorporating the theory into the characteristics of protective relays,the authors present an innovative approach,which employs complementary logic self- checking to implement digital output m odule of a m icroprocessor- based protective relay with fail- safe.The digital output module is greatly different from the general module,in which it checks the correctness of CPU's instructions before carrying them out.When the CPU is in fault and m akes erroneous instructions,it will lock its output in a safe state.Thus wrong operations are reduced while the protective system reliability is enhanced. The approach is combined with VL SI techniques to im plem ent digital output m odule in CPL D.

关 键 词：继电保护装置 电力系统 事故安全 设计 开关量 输出控制单元 

分 类 号：TM774[电气工程—电力系统及自动化]