含双馈风电机组的电力系统故障计算方法研究

发布时间：2018-06-29 19:10

本文选题：双馈风电机组 + 短路计算　；参考：《电工技术学报》2016年01期

【摘要】：双馈风电机组馈出的短路电流特性极其复杂,传统以交流同步电机供电电源为基础的电网故障分析方法不能适用于含双馈电源的电网短路计算。根据双馈风电机组低压穿越运行的技术要求,在电网对称故障和不对称故障条件下,建立了计及其励磁调节特性影响的短路电流计算模型。在此基础上,基于对称分量法建立了含多双馈风电机组接入的电网各序等效电路,通过对电网电动势方程、故障边界条件方程和双馈风电机组短路计算模型方程进行迭代求解,计算电网各支路的故障电流和各节点电压。与算例的仿真结果对比表明,该短路电流计算方法计算准确度高,可较好地满足工程应用要求。
[Abstract]:The short-circuit current characteristic of doubly-fed wind turbine is extremely complex. The traditional fault analysis method based on AC synchronous motor power supply can not be applied to the calculation of power network short-circuit with doubly-fed power supply. According to the technical requirements of low-voltage traversing operation of doubly-fed wind turbine, a short-circuit current calculation model considering the influence of excitation regulation characteristics is established under the condition of symmetrical and asymmetric fault of power network. On this basis, based on the symmetrical component method, the equivalent circuits of each sequence of power grid with multiple doubly-fed wind turbines are established. The power grid EMF equation, fault boundary condition equation and short-circuit calculation model equation of doubly-fed wind turbine are solved iteratively. The fault current and node voltage of each branch of the power network are calculated. The comparison with the simulation results shows that the proposed short-circuit current calculation method has high accuracy and can meet the requirements of engineering application.
【作者单位】：强电磁与新技术国家重点实验室(华中科技大学);国网湖北省电力公司;
【基金】：国家自然科学基金(51177058、51277084)资助项目
【分类号】：TM713

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