【摘要】 深入研究了自激产生的物理过程,强调可以通过外部电力系统等效容抗的大小判断自激是否发生。分析了系统参数和磁路饱和对自激稳定域的影响,通过对一个含串联电容补偿的单机无穷大系统的频域分析,得到了同步发电机的自激稳定域,进一步的分析表明,磁路饱和将显著地减小自激稳定域。文中还针对一个典型的双机电力系统,通过时域仿真验证了分析结果的正确性。更多还原

【Abstract】 The physical process of selfexcitation development is systematically investigated. Whether selfexcitation will occur or not can be judged by the charging capacitance seen at the generator terminals. The influence of system parameters and magnetic saturation upon the stability region of selfexcitation is analyzed. The stability region of selfexcitation is established by a detailed frequency domain analysis on a SMIB power system with a series of capacitive compensation. The further analysis shows that magnetic saturation reduces remarkably the stability region. Digital simulation on a typical dualmachine power system is used to verify the conclusions obtained from the above analysis.更多还原