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METHOD IN, APPARATUS FOR, AND INTERFACE ARRANGEMENT BETWEEN AN ALTERNATING CURRENT POWER SYSTEM AND A DIRECT CURRENT POWER SYSTEM
METHOD IN, APPARATUS FOR, AND INTERFACE ARRANGEMENT BETWEEN AN ALTERNATING CURRENT POWER SYSTEM AND A DIRECT CURRENT POWER SYSTEM
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机译:交流电系统和直流电系统中的方法,装置和接口的布置
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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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