Zhao Zhihong - IEEE Xplore Author Profile

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This thesis mainly analyzes the applications of distance protection zone I for short transmission line or weak-infeed. It demonstrates the calculation method of shortest length of transmission line that distance protection zone I can be applied at power source side and gives suggestions of setting calculation. Moreover, it analyzes the large error between measured impedance value and actual fault ...Show More
An implementation scheme of local BCU installation is introduced in this paper. The BCU is divided into two parts in this scheme, namely, the fundamental BCU and auxiliary BCU, in principle, the former one includes measurement, position acquisition of circuit breakers and isolators and control function, the signals of this part can be standardized, but at present, for the differences of primary eq...Show More
The actual strain of fiber is different according to its different structures and materials. Consequently the sensing characteristics of intrinsic optical fiber sensor are influenced. The responses of coated and jacketed fiber to temperature were analyzed based on the theory of material mechanics. Finite element models of coated and jacketed fiber were also developed to study the thermal strain di...Show More