110kV substation main transformer dual-delay protection system

一种110kV变电站主变双延时保护系统

Abstract

The invention discloses a 110kV substation main transformer dual-delay protection system. A resistor R111 and a resistor R101 are connected in series, and the resistor R101 is connected with a 35KV three-phase power transformer. A resistor R112 is connected in series with a resistor R102. A series connection part between the resistor R111 and the resistor R101 is connected with a connection part between the resistor R112 and the resistor R102 through a resistor R100. One end of a resistor R301 is connected with the 35KV three-phase power transformer, and the other end of the 35KV three-phase power transformer is connected with a resistor R302 and a resistor R311 through a switch K1. The other end of the resistor R302 is connected with a 110KV three-phase power transformer. The 110KV three-phase power transformer is connected with a resistor R003 through a resistor R002. One end of a resistor R001 is connected with the 35KV three-phase power transformer. According to the system provided by the invention, the power failure range is small, a fault point can be easily determined, and the operational reliability of a power grid is high.
本发明公开了一种110kV变电站主变双延时保护系统,电阻R111与电阻R101串联,且电阻R101与35KV三相电力变压器连接,电阻R112与电阻R102串联,电阻R111与电阻R101串联以及电阻R112与电阻R102的连接部位通过电阻R100连接,电阻R301的一端与35KV三相电力变压器连接另一端通过开关K1分别与电阻R302和电阻R311连接,电阻R302的另一端与110KV三相电力变压器连接,110KV三相电力变压器通过电阻R002与电阻R003连接,电阻R001的一端与35KV三相电力变压器连接。本发明停电范围小,易判断故障点,电网运行可靠性高。

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