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Invention Grant
CN107534285B 电网保护方法和装置 有权

电网保护方法和装置
Abstract:
本发明主要涉及一种保护电网(100)免于电气故障的方法，所述电气故障生成第一类型信号和与第一类型信号的类型不同的第二类型信号，电网(100)包括电源(110)和电气装置(120)，二者之间设有接触器(133)，接触器(133)可以被设为两个状态：‑断开状态(0)，用于电源(110)不与电气装置(120)电连接；‑闭合状态(1)，用于电源(110)与电气装置(120)电连接；所述的方法包含以下步骤：‑检测(210)第一类型信号；‑设定(220)接触器处于断开状态(0)；‑验证(230)，在预设时间段，也被称为“决定断开的时间(Tdod)”期间验证(230)是否出现了第二类型信号；‑如果在决定断开的时间(Tdod)期间出现了第二类型信号，保持(240)接触器处于断开状态(0)；‑如果在决定断开的时间(Tdod)期间没有出现第二类型信号，设定(250)接触器为闭合状态(1)。
Abstract(English):

A method for protecting a power grid from an electrical fault, the electrical fault generating a first signal type and a second signal type, the power grid including an electrical power supply and an electrical device between which a contactor is arranged, the contactor being positionable in two states an open state, for which the electrical power supply is not electrically connected to the electrical device; a closed state, for which the electrical power supply is electrically connected to the electrical device; the method including detecting a signal of the first type; placing the contactor in the open state; verifying, during a predetermined time period, whether a signal of the second type appears; if a signal of the second type appears during the period, keeping the contactor in the open state; when no signal of the second type appears during the period, placing the contactor in the closed state.

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