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.
DC capacitors in power electronic converters are a major constraint on improvement of power density as well as reliability. In this paper, according to the degradation data of electrolytic capacitors through the accelerated test, the time-to-failure of the capacitor cell is acquired and it can be further extended to lower stress levels. Then, in a case study of a fuel cell backup power application,...
A LLC resonant converter is a converter, which achieves Buck or Boost gain with Pulse Frequency Modulation, and it is a suitable topology for high power density. This LLC resonant converter has many advantages, such as wide soft-switching range, high switching frequency capability, and low voltage stress of active devices, however, it also has large RMS current and circulating current. From these...
With the increasing size of the wind farms, the impact of the wake effect on the energy yields and lifetime consumption of wind turbine can no longer be neglected. In this paper, the affecting factors like the wind speed and wind direction are investigated in terms of the single wake and multiple wakes. As the power converter is the most fragile component among the turbine system, its lifetime estimation...
Reliability prediction is widely used in industry for estimating field-reliability of a system before empirical data are available for the system. The two branches of reliability prediction, statistical based method and physics-of-failure based method are adopted in different industry sectors to make full use of their different merits. However, for power converters in electric drive system, the operation...
The photovoltaic (PV) grid-connected power system in the residential applications is becoming a fast growing segment due to the shortage of the fossil fuel energy and the great environmental pollution. A new research trend in the residential generation system is to employ the PV parallel connected configuration rather than the series-connected configuration to satisfy the safety requirements and to...
Active neutral-point clamped five-level (ANPC-5L) converter is an attractive topology for 1500V photovoltaic generation system. In this paper, a novel and reliable modulation strategy for the active neutral-point clamped five-level inverter, including the balance control strategy of the flying capacitor voltage are proposed. In order to improve the harmonic characteristics of the output current and...
This paper presents two configurations of dual-input (DI) or three-port (TPC) isolated dc-dc converters for hybrid renewable energy systems such as photovoltaics and batteries. These two converters are derived by integrating an interleaved boost converter and a single-active bridge converter with an ac inductor as a power interfacing element or phase-shift soft-switching converter with an output dc...
A zero-voltage switching (ZVS) pulse-width-modulation (PWM) single-phase inverter using a ZVS transformer-isolated step-up/down dc link is presented in this paper. The proposed ZVS transformer-isolated step-up/down dc link not only makes the switches in single-phase inverter can operate at ZVS condition, but it has a step-up/down input voltage function and it provides an isolation function. Moreover,...
The improved three switch-active clamp forward (3S-ACF) converter is proposed in this paper. The proposed converter has minimized switching loss on all switches of 3S-ACF converter by simple change of gate control scheme without any additional components. In addition, current stress of clamp diode can be significantly reduced. Though, all switches of the proposed converter have low voltage stress...
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.