面向高比例新能源电网短路计算的机电-电磁融合电源模型

为解决新型电力系统计算与分析中传统电源模型难以继续适用的问题，提出一种面向高比例新能源电网短路计算的机电-电磁融合电源模型。一方面，考虑新能源电源通用控制策略作用下的外部输出特性，采用单一压控电流源等效电源侧海量新能源电源的整体输出；另一方面，根据短路电流故障的时间划分尺度，保留传统发电机工频基波意义下的外部输出特性，并采用3个大小不一且衰减速度不同的电压源等效电源侧所有发电机的整体输出。进而采用3个电压源和1个压控电流源并联的形式作为融合电源模型的结构，并采用内点法对融合电源模型参数进行在线辨识。通过短路仿真数据和电网实测故障录波数据验证了融合电源模型的适用性。

Electromechanical-electromagnetic combined power source model for short circuit calculation with high proportion of new energy power grid

To address the issue of the traditional power source model inability to apply continuously in calculation and analysis in the new power system, an electromechanical-electromagnetic combined power source model for short circuit calculation of high proportion of new energy power grid is proposed. On the one hand, considering the external output characteristics of the new energy power source under the general control strategy, a single voltage-controlled current source is used to equivalent the overall output of massive new energy sources on the power supply side. On the other hand, the external output characteristics based on the fundamental frequency of traditional generators are preserved according to the division of short circuit fault time scale, and three voltage sources with different values and attenuation speeds are used to equivalently represent the overall output of all generators on the power supply side. Furthermore, a combined power source model is constructed by connecting three voltage sources and a voltage-controlled current source in parallel, and the parameters of the combined power source model are identified online using the interior point method. The applicability of the combined power source model is verified through short circuit simulation data and measured fault wave recording data of power grid.