负荷模型对天津电网短路电流的影响 Impact of Load Model on Short-Circuit Current in Tianjin Power Grid

特高压接入天津电网后，天津电网将形成1000/500 kV电磁环网，导致电网短路电流水平提高，甚至导致部分母线短路电流超标。负荷模型是影响电网短路电流水平的重要因素，本文针对各静态负荷及感应电动机负荷对天津电网短路电流的影响进行了分析，并从机理上给出了解释。 With the building of UHV substation, Tianjin power grid will form 1000/500 kV electromagnetic ring network, which will lead to the improvement of the short-circuit current, and even make some short-circuit current of bus exceed the switch breaking capacity. Load model is an important factor affecting the level of short-circuit current of power grid, in this paper the influence of the static load and induction motor load on the short-circuit current in Tianjin power grid is analyzed, and the mechanism is given.