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For accurate fault simulations of power systems with large-scale PV power generation systems, electromagnetic transient simulations which take into account switching operations inside the power conditioning systems of the PV generation systems are required. This paper proposes a detailed and an averaged models of large-scale PV power generation systems for electromagnetic transient simulations. The...
In the Automotive Working Group and Power Supply Working Group of Cooperative Study Group on Standard Development for power electronics systems in IEEJ, practical simulation examples of Automotive and Power Supply Systems have been discussed. This paper provides the practical simulation examples for the inexperienced engineers of automotive and power electronics, in order to easily understand the...
Interconnection of photovoltaic power generation systems (PVs) and electric vehicles (EVs) to distribution lines is increasing. This will cause voltage rises due to surplus power injected by PVs during daytime and voltage drops due to simultaneous charging of EVs at nighttime. To cope with this problem, CRIEPI has been developing a distributed static synchronous compensator named μSTATCOM. μSTATCOM...
The Power Supply Working Group, created inside the Cooperative Study Group on “Applied Simulations of Power Electronics Systems” of IEEJ, is developing practical simulation examples of power supply circuits. The simulation examples have the following key features: (1) Parameters in the simulation examples are thoughtfully set to practical values so that one can readily carry out practical simulations...
This paper considers the malfunction mechanism of semiconductor circuit breaker in high voltage DC power supply system (HVDC). In HVDC system, the fast response breaker is required. Semiconductor circuit breaker is paid attention as one of the key technology in HVDC. However, in some condition, the semiconductor circuit is malfunctioned. When malfunction is happened, unexpected large current is flown...
This paper considers the malfunction mechanism of semiconductor circuit breaker in high voltage DC power supply system (HVDC). In HVDC system, the fast response breaker is required. Semiconductor circuit breaker is paid attention as one of the key technology in HVDC. However, in some condition, the semiconductor circuit is malfunctioned. When malfunction is happened, unexpected large current is flown...
Recently, DC power supply systems have been widely viewed as an energy-saving solution. The protection of the system from over current is one of the most important factors in DC power supply system. This paper presents malfunction mechanism of a semiconductor circuit breaker.
This paper considers input current-ripple reduction on Pulse-link DC-AC converter for fuel cells applications operated by zero-current-slope mode. For reducing the input current-ripple, series LC circuit has been connected in parallel at the Pulse-link DC-AC converter. The input current-ripple characteristics have two main domains with combination of series LC parameters. The current-ripple level...
Many switching converters use soft-switching techniques with an active-clamp snubber so as to reduce switching surge and common-mode noise. In particular, the common-source type active-clamped forward converter is known as an effective circuit topology for common-mode noise reduction. On the other hand, replacing the output rectifying diodes with synchronous rectifier circuits, the power efficiency...
Many DC-DC converters use soft-switching techniques with active-clamp snubber in order to reduce switching surge and common-mode noise. In particular, common-source type active-clamped DC-DC converter is one of the most useful circuit topology for reduction of common-mode noise. Furthermore, in low-voltage and large-current DC-DC converters, synchronous rectifier circuits are used to improve the power...
This paper proposes a novel PFC converter topology. The novel PFC converter is a buck-boost type and its output voltage is suppressed up to 200 V. As the result, the withstand voltage of any components can be reduced. That is possible to be higher efficiency and smaller size. Furthermore, the converter is easy to control when the converter operates in the discontinuous conduction mode (DCM). This...
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