The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In this paper a 24 pulse autotransformer based ac-dc converter has been proposed to improvement power quality at the point of common coupling (PCC). The idea is to use an autotransformer based 12-pulse ac-dc converter using a DC ripple reinjection technique to double its pulse numbers (providing a 24-pulse AC-DC converter). A polygon connected autotransformer is used to produce 12-pulses with flexibility...
This paper presents the design and analysis of an autotransformer based 24-pulse rectifier. The proposed ac-dc converter is based on a star connected autotransformer, designed for producing 15-phase shifted ac voltages for 24-pulse rectifier for effective harmonic reduction. Compared with 3-phase rectifier, the proposed 24-pulse rectifier can reduce the equivalent capacity of transformers and realize...
Harmonics in input currents caused by three-phase rectifiers are harmful to wind turbines generators, and multi-pulse rectifiers can be used to reduce the harmonics. Multi-pulse diode rectifiers are of the property that the total harmonic distortion (THD) of input currents and the ripples of output voltage are getting lower with growing pulses, while more complex connected transformer and more diode...
In this article, an improved three- to nine-phase windmill 18- pulse clean power ASD system is presented. A novel third harmonic circulating current calculation method is introduced and used to investigate different topologies. A system evaluation demonstrates the steady state and dynamic performance of a complete rectifier and PWM motor drive.The state-of-the-art simulation is built on the complete...
Novel multiple boost rectifier systems coupled with an autotransformer having a capacity rating of 20% are presented. The autotransformer in the triple rectifier system synthesizes two three-phase voltage systems with a phase shift angle of 20deg and an amplitude of 1.064 times with respect to the line voltages. These asymmetrical voltage systems make the transformer winding structure simpler. The...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.