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发明公开
CN110609211A 一种混合输电线路故障的定位方法及保护装置 审中-实审

一种混合输电线路故障的定位方法及保护装置
摘要：
本发明公开了一种混合输电线路故障的定位方法，包括：将混合输电线路分为架空段和海缆段；采集架空段两侧和海缆段两侧的三相电流和三相电压；根据架空段两侧或海缆段两侧的三相电流和三相电压，计算架空段两侧或海缆段两侧的差动电流，根据所述差动电流判断架空段或海缆段是否发生故障；根据架空段或海缆段的差动保护动作，判断架空段和/或海缆段是否发生故障，解决了现有的混合输电线路故障定位及保护装置可靠性低的问题。
摘要（英）：

The invention discloses a positioning method of faults on a hybrid power transmission line. The method comprises the following steps of dividing the hybrid power transmission line into an overhead section and a submarine cable section; collecting three-phase current and three-phase voltage at two sides of the overhead section and two sides of the submarine cable section; calculating differential currents on two sides of the overhead section or two sides of the submarine cable section according to the three-phase currents and the three-phase voltages on two sides of the overhead section or twosides of the submarine cable section, and judging whether the overhead section or the submarine cable section is in a fault or not according to the differential currents; and judging whether the overhead section and/or the submarine cable section is in fault or not according to the differential protection action of the overhead section or the submarine cable section. The problem that the existinghybrid power transmission line fault positioning and a protection device of the hybrid power transmission line are low in reliability is solved.

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