Design of Multi-Layer Fuzzy Synthesis Evaluation Model on Scheme Selecting

When the power supply scheme is designed, the technical and economic factors of the candidate schemes should be calculated. Since the number of factors that power supply scheme involved is big, such qualitative ones are fuzzy, and the comparison between those factors brings factitious tentative factors. In the paper, we use multi-layer fuzzy synthesis evaluation method to solve this kind of problems, the qualitative factors and secondary factors can be computed. Factors of power supply scheme are analyzed and studied; furthermore, they are divided into two layers. Two layer mathematics model of fuzzy synthesis evaluation method are built. The membership functions of the factors are confirmed according to their different characteristics. The maximum membership value method is used to construct membership functions of the factors according to their characteristics. Then membership values are calculated and the best scheme is chosen. In the end, an application example is given.