Multi-phase fuzzy evaluation of operation in dynamic process in power plant

The multi-phase fuzzy evaluation method is applied to grade operator in dynamic process in power plant. This method simulates evaluation mode of instructor to some extent. The process of drum level variation is divided into three phases. There are different fuzzy demands for level control in each phase. Fuzzy evaluation method is used for evaluation factors in single phase. Then the comprehensive evaluation result is computed with the weighted average method of each factor in each phase. Simulation results show that the grade calculated by fuzzy evaluation method is closed to that by instructor. The grade for operator´s operation is usually given by instructor subjectively. The method could evaluate operator objectively and take the place of instructor in grading operator.