The Scheme of Reactor Inter-turn Protection Based on Sequence Active Power

The reactor does not consume active power during normal operation and when the iron core is saturated. When an inter-turn fault occurs in the reactor winding, a large short-circuit current flows through the faulty winding, and will cause serious heat generation and consume a large amount of active power. This feature can be used to construct the principle of inter-turn protection based on active power. At the same time, the inter-turn fault is mostly asymmetrical, and there are zero-sequence and negative-sequence components. The zero-sequence and negative-sequence active power will affect the determination of scheme, so using the sequence active power to construct the scheme of inter-turn protection, it can effectively identify the inter-turn fault and improve the reliability and sensitivity of the inter-turn protection. At the same time, the engineering data is analyzed to verify the effectiveness and feasibility of the scheme.