According to two kinds of redundancy schemes, especially parts redundancy scheme, this paper suggests a new method.

Use of redundancy mode in control system;

For improvement of the reliability of computer monitoring and control systems, according to the different system structures, the redundancy mode of safety and reliability of the system is reduced to the redundancy of power, controller, input/output, and communication, as well as the safety and reliability of applied software.

Direct recognition of the redundant methods of optimal combining forecasts with non negative weights from information matrix or covariance matrix of forecasting errors can simplify the computation of optimal weights and therefore help the practical application of optimal combination forecasting.

Based on the concept of superior combination forecasting method and on the concept of redundant method, several problems about combined prediction of non-negative weight are studied in this peper.

The Theorem of Redundant Method in Combination Forecasting of Non-negative Weights;

This intelligent protection system takes singlechip PIC16F877A as the core,adopting self power supply and assistant redundancy power supply means,via software and hardware design to relize basic and ad- ditional protection functionalities of the circuit breaker.