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SiC <sc>mosfet</sc> has low on-state resistance and can work on high switching frequency, high voltage, and some other tough conditions with less temperature drift, which could provide the significant improvement of power density in power converters. However, for the bridge circuit in an actual converter, high dv/dt during fast switching transient of one <sc>mosfet</sc> will...
SiC MOSFET has low on-state resistance and can work on high switching frequency, high voltage and some other tough conditions with less temperature drift, which could provide the significant improvement of power density in power converters. However, for the bridge circuit in an actual converter, high dv/dt during fast switching transient of one MOSFET will amplify the negative influence of parasitic...
This paper proposes a low cost gate driver of Silicon Carbide (SiC) MOSFET with a passive triggered auxiliary transistor in a phase-leg configuration. Silicon Carbide MOSFET can work on high blocking voltage and high switching frequency with less temperature drift. However, high switching speed may amplify the negative influence of parasitic components and produce significant voltage spikes during...
Large-scale wind power is integrated into one regional power grid in western China, as well as local thermal power. When the power generated is enough for the local grid, the extra will be sent outside. Based on one regional power grid named HM power grid, this paper mainly analysis its operation characteristics. Firstly, transmission limit of wind power in HM power grid is simulated by restriction...
This paper presents a multi-scale model of synchronous machine in phase-domain for efficient and accurate simulation of diverse transients. It makes use of the simulation methodology frequency-adaptive simulation of transients (FAST) in which the shift frequency appears as a simulation parameter in addition to the time-step size. Through appropriate setting of both shift frequency and time-step size,...
This paper proposes the advanced performance control method of two-stage photovoltaic (PV) inverter with fast energy storage component coupled. The two-stage circuit employs transient maximum power point tracking (MPPT) method to realize fast MPP tracking without causing output distortion and dc-link variation. The generated energy pulse is then absorbed by fast energy storage component. Besides,...
A novel functional subcircuit model based on MATLAB/Simulink for high power circuit simulation is proposed in this paper. The model can overcome the limitation of PSPICE model in high power system and remedy the deficiency in transient analysis of the Simulink model in toolbox. It described the static and dynamic process of thyristor correctly in the simulation of a high power thyristor controlled...
The electromechanical transient model of direct-drive wind farm is built through the reasonable simplification of electromagnetic transient model and its engineering application is realized through power system analysis software package (PSASP) user-defined (UD) model widely used in china. The transient characteristics of direct-drive wind farm connecting to power grid are acquired by combining theory...
In many communications applications semiconductor devices operate in a pulsed mode, where rapid temperature transients are continuously experienced within the die. We proposed a novel junction-level cooling technology where a metallic phase change material (PCM) was embedded in close proximity to the active transistor channels without interfering with the device's electrical response. Here we present...
A multi-scale power system modeling methodology for the integrative simulation of electromagnetic and electromechanical transients is introduced, implemented and validated. It makes use of frequency-adaptive simulation of transients (FAST) in which the shift frequency appears as a new parameter in addition to the time step size. For fast electromagnetic transients, tracking of instantaneous waveforms...
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