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.
Photovoltaic system is one of the most promising renewable energy to meet the energy demand and reduce the global warming. Making the photovoltaic system efficient and compact is a challenge for the researchers. Multilevel inverters with high frequency transformer link eliminate the use of power frequency transformer for direct grid connected photovoltaic arrays. In this paper using high frequency...
This paper provides a brief review on characteristics of main topologies of voltage source multilevel inverters. The selected topologies included conventional two levels, flying capacitor, neutral point clamped, three levels and seven levels cascaded H-bridge inverters. Several performances of topologies including quality of waveforms of output voltage, cost, complexity and reliability are selected...
This paper proposed a 43-level 3-phase 33 kV modular multilevel cascaded (MMC) converter for direct grid integration of renewable generation systems. A high-frequency magnetic-link is considered to generate isolated and balanced multiple dc sources for all of the H-bridge inverters of the MMC converter. The proposed converter is designed and analyzed taking into account the specified system performance,...
Recently, medium (0.1–5 MW) and large (>5 MW) scale photovoltaic (PV) power plants have attracted great attention, where medium-voltage grid connection (typically 6–36 kV) is essential for efficient power transmission and distribution. A power frequency transformer operated at 50 or 60 Hz is generally used to step up the traditional inverter's low output voltage (usually ≤400 V) to the medium-voltage...
The classical approach based on low-voltage converter is commonly employed a low-frequency transformer (inside or outside the nacelle) of wind turbine system. Because of the heave weight and large size of the transformer, the turbine can be expensive and complex for installation and maintenance. As an alternative approach to achieve a compact and light wind turbine a medium-voltage converter using...
Due to the variable nature of renewable energy resources and power demand by the consumers, it is difficult to operate a power system installed with only one type of renewable energy resource. The local grid based renewable generation may be the only solution to overcome this problem. In this regard, an 11 kV Series Connected H-Bridge (SCHB) multilevel Voltage Source Converter (VSC) is proposed, which...
The rapid increase in global energy consumption and the impact of greenhouse gas emissions have accelerated the renewable energy technology into a more competitive area. Due to the variable nature of renewable energy resources and power demand by the consumers, grid based renewable generation has gained significant popularity in the world. High-voltage converter can interconnect the renewable systems...
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.