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This paper presents a wind turbine concept based on a dual-stator-single-rotor (or sandwich-typed) PMSG and a novel converter. First, the structure of the sandwich-typed PMSG is explained. Then, according to the principle of the PMSG, a novel converter topology is proposed. Finally, a detailed direct drive wind turbine model based on the converter and the PMSG is built in the Matlab/Simulink. Thorough...
The paper conducted a theoretical analysis and experimental research on the modulation strategy, capacitor voltage control strategy as well as capacitor pre-charge control strategy of modular multilevel converter (MMC). According to the mathematical model of MMC, The combination of CPS-SPWM modulation strategy and capacitor voltage balancing algorithm based on selection of sub-modules is proposed...
On-line monitoring and diagnosis of wind power generation is not easy because of its discrete distribution. In this paper, a new monitoring and diagnosis system for this problem is presented, which is based on ad-hoc networks. The reliability and maintenance is improved dramatically and some special functions for components failure alert are also added. Finally, a small ad-hoc network for simulation...
A new cascade buck-boost topology with passive lossless snubber is proposed in this paper, it has been successfully used in PFC circuit of high voltage system. Switching losses and EMI noises are reduced by restricting di/dt of the diode reverse recovery current and dv/dt of IGBT collector-emitter voltage. The IGBT in the buck circuit operates at ZVS turn-off and ZCS turn-on. The freewheeling diode...
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