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A novel proportional resonant (PR) controller in the VSC-HVDC systems is proposed in the paper. The technique took full advantage of the characteristic of PR controller which can realize zero steady-state error in AC input signal under α-β coordinate. In the method, the active and reactive current component in the vector control strategy are transformed in the stationary frame to achieve the target...
Establishing the heat-supply network availability mathematical model based on the smallest cutset under actual conditions by unified method of the probability and the fault conditions hydraulic simulation.First enumerates component fault of pipe network, simulates the flow of the heat-supply network and heat user under this operating conditions by the solution of matrix equation of pipe network, and...
This study uses the computational fluid dynamics (CFD) method to evaluate the natural wind environment of a high-rise residential building under two unit design schemes. The impacts of openings' location and size on the indoor wind environment are also investigated. After that, the optimization advices for the adverse design scheme are brought forward and carried out in its further optimization. The...
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