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In literature, the details of engineering power converters are often discussed in a limited scope. However in practice, the design of such converters entails consideration of the whole circuit as the many subsystems of are inevitably linked together. This paper presents a scripting method to assist in the design of large power converters. Such an approach simplifies iterations in the design process...
This paper describes the configurations of semiconductor circuit breakers we developed for higher-voltage direct-current (HVDC) power feeding systems. Semiconductor breakers have some merits. The shutdown parts of the breakers are compact and can be controlled remotely. In addition, they do not need to be replaced after shutting down a short circuit. When semiconductor breaker shutdown overcurrent...
The principle of full-bridge DC-DC converter is briefly expounded, including the two typical control methods, named limited dual polarity hard-switch control and phase-shifted soft-switch control. Then the common mode noise equivalent circuits of full-bridge DC-DC converter are deduced, taking the common mode noise of the bridge leg's midpoint into account, and the difference between the two typical...
Maximum power point tracking (MPPT) techniques are used in photovoltaic (PV) systems to maximize the PV array output power by tracking continuously the maximum power point (MPP) which depends on panel's temperature and irradiance conditions. The Perturb and Observe (P&O) MPPT algorithm is the most commonly used method due to its ease of implementation. But it has some drawbacks such as the oscillation...
This work reports the results obtained using the SEPIC converter as an MPPT (Maximum Power Point Tracker) interface for photovoltaic systems employing a single voltage sensor. The MPPT algorithm is based on the variation of the input static characteristic impedance of a SEPIC converter fed by a photovoltaic panel. Although the SEPIC input impedance theoretically depends on its load resistance, it...
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