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There is a large risk of sub-synchronous oscillation in the large-scale wind plants connected to the series-compensated transmission system. The sub-synchronous oscillation will cause the wind plants to take off from the grid and damage crowbar circuits, which seriously threatens the safe and stable operation of the power grid. The external impedance characteristic of direct-drive permanent magnet...
This paper introduced the main point of three winding transformer impedance circle characters that is constructing the 3D locus between the voltage differences in the high- and low-(or middle-) sides of a particular phase against the cur rents of this two windings. In additional, error terms caused by exciting current of both two winding and three-winding trans former have been analyzed. Current compensation...
1960s, with the published works of Chandler and Ansoff, strategic research started; 1980s, study about Strategic Human Resource Management (SHRM) is of the rise of the best human resource perspective, contingent perspective and configuration perspective. There are two views about the relationship between Strategic Human Resources and business strategy: the contingency scholars think, human resources...
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