Hauptman Ham, LLP
Current source converter differential protection method and relay protection device
Embodiments of the present invention disclose a current source converter differential protection method, including: sampling, by a relay protection device, secondary side currents of current transformers on two sides of a protected current source converter, to obtain incomer-side three-phase currents, and outgoer-side three-phase currents; rectifying the incomer-side three-phase currents and the outgoer-side three-phase currents, to obtain an incomer-side input current and an outgoer-side output current which are equivalent; converting the incomer-side input current and the outgoer-side output current according to a current ratio of the current transformers on the two sides, to acquire a transient differential current and a transient restraint current; acquiring a differential current and a restraint current according to the transient differential current and the transient restraint current; and achieving differential protection according to the differential current and the restraint current. The embodiments of the present invention further disclose a relay protection device correspondingly.
NR ENGINEERING CO., LTD. NR ELECTRIC CO., LTD.
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inventional inventional inventional inventional inventional
Quanrong Wei Xiangjian Guang Qixue Jun Quanrong Weiqun
Shen Yan Shi Wang Zhang Chen Shen Liu