【作者】 钟慧荣； 周云海；

【Author】 Zhong Huirong Zhou Yunhai (College of Electrical Engineering & Information Science, China Three Gorges Univ. ,Yichang 443002 ,China)

【机构】 三峡大学电气信息学院；

【摘要】 同步电机自励磁是无励磁发电机在过大的电容负荷下机端电压自发建立、上升的一种现象, 自励磁产生条件及其暂态过程是研究自励磁的两个方面．基于自励磁物理过程的分析,介绍了用状态空间法判断自励磁产生条件的简便方法,并通过建立全系统较详细的数学模型,用Matlab语言编写了仿真程序,详细、逼真地模拟了同步电机在同步自励磁及异步自励磁后的动态过程．更多还原

【Abstract】 Self-excitation of synchronous generator is an abnormal operating mode under excessive capacitive load; its stator current and voltage will increase spontaneously. The self-excitation conditions and the transient process are two aspects for studying self-excitation. Base on the physical processes analysis of synchronous generator under self-excitation, a simple approach with state-space method to judge whether self-excitation occurs is introduced; accurate mathematical models of system were built and their digital simulative software was programmed; dynamic processes of synchronous generator under synchronous self-excitation and a-synchronous self-excitation were simulated in detail and vividly.更多还原