Aiming at solving the problems of energy-saving

environmental protection

economical operation and comprehensive management for gas-fired power plants

this paper builds up an evaluation index system based on comprehensive consideration of environmental protection

reliability

equipment management

production economy and production technology after analyzing the operation and management methods of gas-fired power plants. The vector angle cosine method is applied to calculate the index's weight

and combining with the principal component analysis method

it is used to carry out comprehensive evaluation for gas-fired power plants. A comprehensive evaluation model is established so that the weights and rankings of the indexes at different levels are also calculated. Taking 6 gas-fired power plants of an enterprise as the examples for verification analysis

the result demonstrates that this method is valid and feasible

which can provide indexes and method support for gas-fired power plants' production benchmarking management and power plant unit competitions.