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MOA (Metal Oxide Arrester) has been widely used in the world because of its excellent nonlinearity, long-lasting anti-aging properties and excellent overvoltage protection performance. The performance degradation of the MOV occurs in the long-running process because of environmental reasons, so the online monitoring system for the MOA has a great significance for the stable operation of the power...
Underground backfill mining is a complex and high-cost mining technique, which was designed to control ground pressure and prevent rock mass movement and ground deformation. Unfortunately, the results were not always as good as expected in practice. This paper addresses a case of ground movement induced by backfill mining in a nickel mine, China. Combined with geological investigation and ground monitoring,...
An over-voltage online monitoring system based on the impulse full current of arrester is developed in this paper. The system measures the wave head and amplitude of the impulse full current of arrester through external-integral rogowski coil, and transfers the measurement result to the upper computer via USB optical measuring system, and then implements the measurement and monitoring on over-voltage...
GPS meteorology is a boom cross-discipline with multiply discipline, and it's a new technology by collecting GPS measuring data to extract meteorological parameters contained in it. Deriving precipitable water vapor from ground-based GPS is one of the important researches. Ground-based GPS network in Chengdu plain is the first network of being continuous and real time in Sichuan region. Chengdu station...
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