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Variation of Short-circuit Current in the Power System With Large-scale Wind Power Centralized Access

机译：大规模风电集中接入的电力系统短路电流变化

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摘要

The short-circuit current problem is a key issue in the operation control and rational planning of large power grids. With the centralized accsee of large-scale wind farms, the power planning and operation departments are focus on the short-circuit current contributed by wind power. Doubly-fed induction generator (DFIG), the most widely used wind turbine currently, is selected for research in this paper. The short-circuit characteristics of DFIG are analyzed, and a practical model for short-circuit current calculation with multiple wind farms in an actual power grid is constructed. The proposed practical calculation model can simplify the modeling process, and ensure the calculation accuracy. Applying the model, the variation of the short circuit current on the access point is simulated under different access forms and installed capacities. Finally, the contribution of large-scale wind power to the short-circuit current of the regional bus (110kV and above) is given. The result can provide practical reference for the power sectors.
机译：短路电流问题是大型电网的运行控制和合理规划中的关键问题。随着大型风电场的集中访问，电力规划和运营部门将重点放在风力发电引起的短路电流上。本文选择了目前使用最广泛的风力涡轮机双馈感应发电机（DFIG）进行研究。分析了双馈双馈发电机的短路特性，建立了实际电网中多个风电场的短路电流计算实用模型。提出的实用计算模型可以简化建模过程，并保证计算精度。应用该模型，在不同的接入形式和安装容量下，模拟了接入点上短路电流的变化。最后，给出了大型风电对区域母线（110kV及以上）短路电流的贡献。该结果可为电力部门提供实际参考。

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