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A wide-area damping control strategy comprehensively considering synchronous generators and doubly fed induction generators is proposed which is based on the inter-area low frequency oscillation problem caused by large area interconnected power grid and massive grid connected doubly fed wind farms. Also, a new optimization algorithm called Mean-Variance Mapping Optimization algorithm with the advantage...
Open-loop Volts/Hz controlled industrial adjustable speed drives (ASD) can often experience undesirable sustained oscillations. Factors affecting these oscillation states include induction machine (IM) parameters, dead time, dc link capacitor size, IM saturation, output voltage, carrier frequency, and IM speed. Many literatures have discussed the instabilities in light load or low frequency operating...
The tubular pump device model including rotor, stator and inlet and outlet passages was simulated based on SIMPLEC arithmetic and standard k-?? RNG turbulence model. The match of rotor and stator in tubular pump was optimized. The numerical results show that the device model has a steady flow field and high efficiency when the distance between rotor and stator is 0.11D2. With the distance increasing...
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