中文摘要：

准确计算整个电网的地磁感应电流（GIC）无功扰动非常困难。针对超特高压电网广泛采用的单相自耦变压器,提出了一种基于变压器U-I曲线和铭牌参数计算变压器GIC无功损耗的方法,算法利用厂家提供的U-I曲线和铭牌参数建立ψ-i曲线解析模型,求取变压器的GIC无功扰动增量,适用于地磁暴影响评估的工程计算。算例分析结果验证了算法的有效性。

英文摘要：

Since it is very hard to accurately calculate the reactive power turbulence caused by the GIC（Geomagnetically Induced Current） for the whole power grid,a method is proposed to calculate the GIC reactive power loss of single-phase autotransformer widely used in UHV and EHV power grid,which builds the analytic model of ψ-i curve based on its U-I curve and nameplate parameters to calculate the reactive power increment caused by the GIC. The proposed algorithm is suitable for the engineering calculation to assess the GIC influence and its effectiveness is validated by case study.