Rapid short-circuit protection system for direct current bus of energy storage converter
An energy storage converter and DC bus technology, applied in the field of converter control and power control, can solve the problems of long relay operation time, battery impact, economic loss, etc., and achieve the effect of avoiding the continued expansion of accidents.
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[0021] The technical solution of the present invention will be further described in detail below based on the drawings of the specification.
[0022] Such as figure 1 Shown is the conventional circuit schematic diagram of the energy storage converter, including the main inductor, DC-AC circuit, DC bus, bidirectional DC-DC circuit and battery. In the bidirectional DC-DC circuit, the first IGBT K top With the first diode D top Anti-parallel, second IGBTK bot With the second diode D bot Anti-parallel connection, the emitter of the first IGBT is connected in series with the gate of the second IGBT, the first inductance L DC Connected in series with the emitter of the first IGBT and the first relay K DC Between, the other end of the first relay is connected to the first filter capacitor C filter , The first filter capacitor is connected in parallel between the first relay and the second IGBT emitter. The output end of the bidirectional DC-DC circuit is connected to the battery, w...
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