Research And Design On A Kind Of New Computer Key Of Microcomputer-based Program Anti-mistake Defense System In The Substation

The paper introduces the concept, principle and application of the microcomputer-based program anti-mistake defense system which is widely used in the power automation field . Since the power system develops very fastly and some accident caused by mistake-operation often occurs ,the demand for a new generation computer key is necessary .This article describes the features of embedded system and analyses the advantages of the computer key based on embedded system design . In addition the paper also expatiates on the target of function requirements , selection principle of CPU type , components of hardware , implement of human machine interface , design of power supplier module and the experience during the application of these hardware.The new generation computer key succeeded in providing a friendly human machine interface , a large mass storage , portable and miniaturization design and prompting capability of anti-disturbance and stability of the computer key.