Development and application of distribution network comprehensive analysis system
Through a system study of the fundamental theories of distribution network analysis, operation optimization and network architecture assessment, including static security analysis theory, power flow calculation method, state estimation technique, network optimization method, fault isolation and recovery algorithm, and reactive power optimization algorithm, etc, a graphic distribution network analysis system was developed. Feeder renovation and sectionalization is determined by using the “User Loss Vs Load Loss” charts with both economy and reliability taken into consideration. Interpolation method is used to work out an optimal reactive power compensation capacity, enhancing computational speed. Vector data layering and blocking technique increases the processing speed of the graphic system. The system has been applied in over ten power utilities, and proved effective and helpful.
Research on the structure of urban power network based on long-term planning of EHV network
In the procedure of urban electric network planning, many problems should be considered, such as how to adapt to the future load growth in the city, how to ensure coordinational development with future planning of higher voltage network, how to keep the N-1 structure of the lower voltage network as possible in the process of breaking up electromagnetic ring, and how to avoid the waste of huge investments due to breaking up electromagnetic ring and so on. The paper proposed the guiding ideology of planning urban electric network structure and corresponding technical principle: during the development of urban power network, the prospective planning of the higher voltage network should be considered and the timing and location to break up the electromagnetic ring should be reasonably determined; after breaking up the electromagnetic ring, the target network structure should keep the small ring structure as much as possible instead of the radial structure with power supply by single circuit. The guiding ideology of urban electric network planning and corresponding technical principle proposed in the paper were validated by a real case.
Fungal Biotransformations in Pharmaceutical Sciences
The regio- and stereoselective conversion of complex substrates represents one of the major advantage of microbial biotransformation. This chapter covers the biocatalytic capacities of fungi to derivatize bioactive small molecules, both from natural sources and from synthetic compounds. We focus particularly on sterol and taxane biotransformation. We also present examples at the interface of biotransformation and pathway engineering using recombinant organisms, with an emphasis on the production of lovastatin derivatives. Finally, we highlight selected studies on fungal xenometabolism which serves as a model to study the breakdown of drugs in mammals.