Comprehensive Assessment Method of Short-circuit Current Suppression Scheme

Abstract

The high interconnection of power systems improves the economic benefit and power supply reliability of power grid operation. However, it also makes the problem of short-circuit current prominent. At present, most short-circuit current suppression schemes are evaluated by engineering experience and complex calculations. There is no reasonable assessment method for short-circuit current suppression schemes. In this paper, the short-circuit current security margin index, power flow transfer ratio index, and power supply ability assessment index are proposed. In addition, the adaptability of the short-circuit current suppression scheme in the future, the investment economy, and the difficulty of power grid construction must be considered. The open-loop suppression scheme of the electromagnetic loop network is comprehensively assessed based on the above factors. The optimal short-circuit current suppression scheme is selected. A practical example is used to verify the effectiveness and adaptability of the proposed assessment method.