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The paper deals with the evaluation of robustness of high power Press Pack IGBT modules under short circuit conditions. The severity of the tests is usually related to the achievement of the real failure mode which drives the device to withstand a big amount of energy. The most and well known methods to evaluate the robustness of the devices have been analyzed and improved in order to operate with...
Effective protection circuits for high power step-down converter are presented in this paper to protect the converter from damage under any fault condition. A novel built-in soft-start circuit with simple topology is implemented by controlling the input reference voltage of error amplifier to eliminate the inrush current and avoid the overshoot of the output voltage without using external capacitor,...
An important aspect of wind power plant (WPP) impact studies is to evaluate the short circuit (SC) current contribution of the plant into the transmission network under different fault conditions. This task can be challenging to protection engineers due to the topology differences between different types of wind turbine generators (WTGs) and the conventional generating units. This paper presents simulation...
Apart from the positive technical consequences like reducing losses, the increasing penetration of distributed generation (DG) units connected to the distribution network, has lead to the increase of the short-circuit (sc) currents and the fault level. Therefore it is important to know the contribution of each unit. This paper presents the available analytical equations to calculate the short-circuit...
Soft switching full-bridge phase-shifted PWM converter using IGBTs with auxiliary transformer is presented in this paper. Zero-voltage and zero-current switching for all power switches is achieved for full load range from no-load to short circuit by adding active energy recovery snubber and auxiliary circuits. The principle of operation is explained and analysed and experimental results are presented...
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