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发明公开
CN107069680A 一种四绕组磁通约束型故障电流限制器 无效 - 驳回

一种四绕组磁通约束型故障电流限制器
摘要：
本发明公开了一种四绕组磁通约束型故障电流限制器，包括作为故障电流限制器本体的变压器铁芯、三个交流绕组和一个直流励磁绕组；三个所述交流绕组及直流励磁绕组均以相同的方向卷绕在变压器铁芯上，且每个交流绕组各自接入电网的三相线路中的其中一相线路；所述直流励磁绕组由直流线路供电，通过控制直流励磁绕组的电流量，控制所述变压器铁芯内磁通量大小，从而改变故障电流限制器的对外电抗值。本发明能够适用于单回输配电线路、涵盖0～500KV高压输电线路。本发明在系统正常状态下，本发明对系统传输功率及线路电流几乎无影响，电压损失小；在发生单相接地故障时，则能快速有效抑制故障相电流。
摘要（英）：

The invention discloses a four-winding magnetic flux constraint type fault current limiter, which comprises a transformer core serving as a fault current limiter body, three AC windings and one DC exciting winding. The three AC windings and one DC exciting winding are wound on the transformer core in the same direction; each AC winding is connected with one phase of line in three phases of lines of a power grid; the DC exciting winding is powered by a DC line; and by controlling magnitude of current of the DC exciting winding, magnetic flux of the transformer core is controlled, thereby changing external reactance value of the fault current limiter. The four-winding magnetic flux constraint type fault current limiter is suitable for single-circuit transmission and distribution lines and 0-500KV High-voltage power transmission lines; and the fault current limiter almost has no impact on system transmission power and line current under normal state of the system, is small in voltage loss and can suppress fault phase current quickly when having a single-phase earth fault.

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