Application of synchronous phasor measurement technology to bay levels of substations;

The increasing application of station bus and process bus makes a strict requirement for bay level intelligent electrical devices (IEDs) with multi-network interfaces,high reliability and real-time performance.

In this paper a mapping model that maps various logical interfaces in substation automation system to independent physical interfaces is constructed according to IEC 61850 standard and a distributed information-processing mode based hardware framework for protection and monitoring devices of the bay level is proposed.

Research on working mechanism of story isolation structure;

Theoretical study on story isolation system

Based on an analysis of interoperability support, a universal design method of IED model is given, and problems in realization of bay level IED model are discussed.

The software design scheme of bay level IED based on IEC 61850 is studied, the function model of IED analyzed and the module composition of software designed.

simplified analysis on calculation model of interlayer seismic isolation;

Here the application of the interlayer seismic isolation in some engineering is introduced,and the finite element program—ETABS is used for making out the dynamic nonlinear time-history analysis.

This paper describes the working characteristic of interlayer seismic isolation.

The vibration reduction mechanism and dynamic characteristics of the interlayer seismic isolation system and the difference between such system and the base isolation system are introduced.

The effective zonal isolation of cement sheath during the whole period is the procondition for production in the oil field, Zonal isolation of cement sheath have direct relationship to the production life of the oil well, which have attached most importance to the property of the zonal isolation, and the more research have been done for them.