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AC POWER SYSTEM AND METHOD IN DC POWER SYSTEM, APPARATUS FOR THE SAME, AND INTERFACE DEVICE
AC POWER SYSTEM AND METHOD IN DC POWER SYSTEM, APPARATUS FOR THE SAME, AND INTERFACE DEVICE
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机译:交流电源系统和直流电源系统中的方法,相同的装置以及接口设备
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摘要
A method and apparatuses for handling delayed zero crossing in fault current through a circuit breaker are disclosed. An interface arrangement is configured to couple an alternating current, AC, power system with a direct current, DC, power system, or vice versa. The interface arrangement includes at least one converter for conversion of AC power to DC power, or vice versa, which includes a DC side for coupling of the converter to the DC power system and an AC side for coupling of the converter to the AC power system. A circuit breaker is arranged in a current path between the AC side of the at least one converter and the AC power system. There may be a risk of delayed zero crossing in fault current occurring in case a fault occurs in a predefined portion of the interface arrangement. If a fault is sensed to occur in the interface arrangement within the predefined portion of the interface arrangement, opening of contacts of the circuit breaker can be delayed by a selected delay time period, compared to if the fault would have been within a portion of the interface arrangement different from the predefined portion.
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