提出了一种基于统一模型的励磁系统聚合方法，可有效解决待聚合机群中存在多种结构类型励磁且参数存在明显差异的难题。核心思路是将多种类型不同的励磁转为统一形式，利用模型系数矩阵聚合前后结构不变的特性，直接获得了等值机励磁模型的参数。与传统的基于频域传递函数拟合和时域仿真优化的励磁系统聚合方法相比，所提方法计算量小，对聚合的工作点设置及参数寻优方向不存在依赖性。仿真案例验证了方法的有效性。%This paper proposes a generator excitation system aggregation method based on a unified model. It can be used to aggregate generator excitation systems with different models and parameters of significant difference. The key idea of this paper is to convert various excitation models into a unified one. Then models and parameters of equivalent generator excitation system can be directly derived from the structure preserving characteristic of coefficient matrix. Compared with traditional methods which are based on transfer function fitting in frequency domain and time domain simulation, the proposed method requires less calculation, and does not rely on setting of working point and optimization direction. Simulation results show good aggregation effect, thus the validity of this method was demonstrated.
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