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The distributed energy generation system is one of the main forms of the second-generation energy system currently. Three kinds of viable schemas of distributed energy supply system for nine users of the small region heat of Yangpu area combining with urban heating were proposed in this thesis, in which the gas turbines were selected. By analyzing the heat economy and pollutant emissions, the advantages and disadvantages of each schema were found out and the relatively better one was selected ultimately. Finally, some possible development trends and the prospects of the distributing energy supply system were also related and some complementary proposals were to table for some aspects of the system.

In this paper the failure sets and symptom sets of the problem for a 1000MW unit were determined. On the basis of distinguishing the precipitous decline and slow decline of vacuum, the calculation model of the state quantization value of every symptom parameter was established and the fault characteristic vector of the lower vacuum of the condenser was obtained by the simulation test of the unit. Based on BP neural network, the fault diagnosis model of condenser was established, and the low vacuum fault of the unit was diagnosed. The results show that the fault diagnosis of condensers can be used in the actual unit operation according to the fault theory domain feature vector of 1000MW unit.

The key in the life cycle assessment is how to measure the environmental impacts. In this paper the environmental impacts of power station was measured by the money. Based on the statistic data in all country the environmental impacts cost of power station was concluded, which was combined with the inventory analysis of power station and applied the results of the environmental economics in our country. On this result, it can be further combined with the conventional technical and economic analysis of the power station, which lays a solid foundation for the comprehensive evaluation of TEE (technology, economy and environment) of the production process of the power station.