New control strategy for variable speed wind turbine with DC DC converters

... New Control Strategy for Variable Speed Wind Turbine with DC- DC converters Vladimir Lazarov * , Daniel Roye † , Dimitar Spirov * ... combination with two optimum wind turbines power/torque versus speed characteristics. Two control loops: inner feed forward current control loop and outer voltage control closed loop are applied for ... Combined with appropr...

Ngày tải lên: 03/01/2014, 19:15

... high and low wind speeds. Fig.9 : Wind turbine output power without MPPT control method for high wind speed. Fig.10 : Wind turbine output power with MPPT control method for high wind speed. ∆ α ... proposed MPPT control method. Fig.7: Wind turbine output power without MPPT control method for low wind speed. Fig.8: Wind turbine output power with MPP...

Ngày tải lên: 03/01/2014, 19:15

... granular sludge with an average diameter of 226 m was observed on day 65. This formation period is much shorter than that employed in our previous study without control strategy for the selection ... already been formed in our previous studies. Based on the preliminary experimental results, we decided the control strategy for the selection of well-settling sludge. Then, we appl...

Ngày tải lên: 05/09/2013, 10:15

... symmetrical dc- dc converters operating in the opposite phase angle in order to generate a sinusoidal current waveform feeding to a single-phase grid. For small grid-connected wind turbine systems, ... waveform when the dc voltage is 50V. Fig. 13. Output current waveform when the dc voltage is 100V. Fig. 14. Output current waveform when the dc voltage is 200V. Fig.15. Output cu...

Ngày tải lên: 03/01/2014, 19:16

Ngày tải lên: 03/01/2014, 19:52

... efforts to prevent and control hepatitis B and hepatitis C, these diseases remain serious health problems in the United States. Therefore, the Centers for Disease Control and Prevention (CDC) ... Efforts are going on to develop a vaccine for hepatitis C, which could substantially enhance hepatitis C prevention efforts. The committee recognizes the need for a safe, effective, an...

Ngày tải lên: 06/03/2014, 01:20

... efforts to prevent and control hepatitis B and hepatitis C, these diseases remain serious health problems in the United States. Therefore, the Centers for Disease Control and Prevention (CDC) ... National Strategy for Prevention and Control of Hepatitis B and C Copyright © National Academy of Sciences. All rights reserved. Hepatitis and Liver Cancer: A National Strategy for...

Ngày tải lên: 06/03/2014, 01:20

... people with chronic diseases, in line with the WHO-developed strategy for strengthening health systems. Proposed action for Member States National multisectoral framework for the prevention and control ... multisectoral national policy for noncommunicable diseases in conformity with the global strategy for the prevention and control of noncommunicable diseases. •...

Ngày tải lên: 07/03/2014, 04:20

... the promoter of a C. fusiformis fcp gene has been isolated and tested for its applicability in C. fusiformis transformations. Prim- ers were designed based on a C. fusiformis fcp cDNA sequence ... was ligated with pCfcp, generating pCfcp-ble. This plasmid was used for C. fusiformis transformation by microparticle bombard- ment, yielding typically 36 ± 4 zeocin-resistant trans- formants...

Ngày tải lên: 07/03/2014, 21:20