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Despite the advantages of variable Speed pumped storage power plant (PSP) included, as following statements: increasment of optimum efficiency in production mode and consumption mode, high speed for grid's requirements response in critical moments (such as: disturbances, black out,…); it's necessary, to achieve these benefits easily by energy storage practices. Now Doubly Fed Asynchronous Machine (DFAM) technology by means of modern equipment (MLVSC, Cycloconvertor) and employment of them is considered to achieve mentioned purposes, synchronous machines instead in PSP units. In this paper, technical comparison between the several kinds of PSP's drives methods is presented; also a PSP's unit is modeled (as electric, hydraulic, mechanic& control system) and simulated by Direct Torque Control (DTC) technique and TwoLevelVSC equipment, as novelty.Application of TwoLevelVSC and DTC method togethercaused to increase very high dynamic response of PSP in uninterrupted operationthe whole of times.The results of paper in Generation mode, express to increase efficiency in one unit of 4×250MW PSP that justifiesvariable SpeedPSP application. The simulations performed by Matlab software.

A Novel Control Method Of Variable Speed Pumped Storage Power Plant