小型带不可控整流负载异步发电机自激电容确定

Determination of self-excited capacitances for small uncontrolled rectifier load induction generator

针对异步发电机带整流系统稳态运行后其电路为多回路、变拓扑结构,直接采用电流回路法分析极为困难复杂的特点,根据异步发电机定、转子边的电势平衡关系列写电压方程式,然后把方程式折算到基值频率,得到能够进行稳态分析的电机一相等值电路。在忽略整流桥有功损耗的前提下,引进功率平衡法将直流侧、交流侧联系起来,结合电机的等值电路,建立了异步发电机带整流负载系统的完整数学模型,该模型不仅分析过程简便,而且具有较高的分析精度。

In view of the induction generator carrying a rectifier bridge, the overall system becomes multi-loop, non-linear, variable-topology, it is of great difficulty and complexity to analyze in loop current directly. The voltage equation is written by the potential balance relationship of induction generator stator, rotor side, the equation is converted to the base frequency, and then the motor one-phase equivalent circuit of steady state analysis can be obtained. On the premise of ignoring rectifier bridge active power loss, the power balance method is introduced to link with DC, AC side. A complete mathematical model of induction generator with rectifier load system with the induction generator is built. Using this model the analysis process is not only simple, but also has high accuracy.