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The fundamental building block of cascaded static synchronous compensator used in distribution grid is H-bridge based converter module. In this paper a type of "plug and play" module was introduced to improve the device compensation performance and reliability. The module based on IGBT parallel connection was discussed about the design of electrical parameters and physical structure. In...
The failure of equipment or sub-system leads to disruption of building cooling, heating and power (BCHP) system. This paper analyzed the energetic, economic and environmental performances of BCHP system taking reliability and availability into consideration. The results indicate that the integrated performance of the optimized non-redundant BCHP system is the best while its availability of cooling...
Failure of a component in BCHP (building cooling, heating and power) system may result in failure of a sub-system or of the whole system. The reliability and availability analysis of BCHP system is helpful to the designer to decide the redundancy in case of equipment failure. This paper presents the redundant design of BCHP system and its operation mode. The SSM (state-space method) combined to the...
A comprehensive and accurate user service request description is vital to the success of service discovery. This paper proposes a personalized description model for user's service request, which can update user's current needs based on current context. The service recommendation method based on this model is also introduced in detail, and the experiments illustrate the effectiveness of the model for...
Due to the importance of fault knowledge in operation and maintenance of power plant equipments, this paper proposes a general model of fault knowledge base on the basis of database framework, which can present and manage the knowledge reasonably. Supported by the concepts of two-dimensional table and attribute, a thorough analysis is made on the fault attributes from the aspects of fault object,...
Based on the current situation of underwater navigation, this paper presents an underwater topographic matching navigation method which is the integration of TERCOM and MCTM algorithm. First of all, we use the TERCOM to acquire a rough position of vehicle. Secondly, a search area is found according to TERCOM positioning result. The multi-contour matching algorithm is implemented in the area. The algorithm...
With the development of industry, maintenance has become an important factor that influences survival and development of a corporation. It is an effective way for a power plant to achieve management modernization and enhance market competition by making condition based maintenance. There are numerous pieces of equipment in a power plant, but the maintenance requirement is different for respective...
Aiming at the difficulty in selecting the maintenance mode for power plant equipment with ration, the fuzzy comprehensive evaluation method based on entropy weight and analytic hierarchy process (AHP) is suggested. It combines entropy weight with AHP for against the casualness and subjectivity in traditional method. With the method, the mode is divided into some layers composed of index factors, and...
In this study, the modified panel base package (PBP) technology with enhanced cover layer is proposed to improve packaging reliability. One cover layer which has larger Young's modulus than the lamination material is applied to restrain the expansion/shrinkage of dielectric. The testing samples are fabricated and tested under temperature cycling. Besides, three-dimensional finite element (FE) analysis...
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