【摘要】 针对单机系统的自励磁判据很难在大系统网络中推广应用的不足,重点研究了在大型电网(即多机系统)中如何进行全网机组自励磁判定的数学模型,提出在系统网络情况下采用同步机数学模型结合Ⅱ型线路模型的新思路,利用状态空间分析法,建立多机系统的自励磁状态方程,通过方程的矩阵特征根的性质来判断自励磁的发生与否及其特征。文章实现了算法和框图,结合安徽省电网的黑启动校验进行了实例计算,计算结果证明该方法是可行的。更多还原

【Abstract】 The self-excitation criterion of single-machine is difficult to apply to multi-machine power system, so the mathematical model to judge the self-excitation of all generating sets in multi-machine power system is researched. Combining the mathematical model of synchronous machine and the Ⅱ-type of equivalent circuit for transmission line, the self-excitation state equation for multi-machine system is established by use of state-space method, therefore, whether the self-excitation does occur or not it can be judged by the feature of the eigenvalue of the matrix, and the flow chart of the calculation is given. Taking the verification of black start in Anhui power network for calculation example of the presented method, the obtained results show that this method is feasible.更多还原