基于暂态模型的异步发电机稳压电容计算

鉴于机端电容大小对异步发电机端电压的影响，为保证异步发电机稳压运行，提出了一种计算电容值的方法。把异步发电机稳态运行作为暂态运行的特殊情况考虑，根据任意速旋转坐标系统下异步发电机的暂态模型，推导了稳态运行时相应的矩阵方程。令发电机稳态运行所对应齐次方程的行列式为零，并使发电机的端电压为恒值，计算不同运行状况下机端电容值。以发电机端电压保持恒值为约束条件，用直接搜索优化方法求解目标函数，此法克服了传统的迭代解法稳定性差与难于处理有约束条件之缺点。论文给出了异步发电机在不同负载下稳压所需的机端电容值，计算结果与实验结果的相互吻合说明了分析方法的有效性与准确性。

Capacitance Calculation for Keeping Constant Voltage of Induction Generators Based on Transient Model

An approach for the terminal capacitance calculation of an induction generator is presented to keep the terminal voltage at a constant value,considering the fact that the terminal voltage is associated with the terminal capacitance of the induction generator.With steady-state operation as a special case of transient operation,the matrix equations for steady-state operation,which is based on the transient model of the induction generator in the arbitrary reference frame,are derived.By equating the determinant of the steady-state homogeneous equation to zero,the terminal capacitances for maintaining constant voltage are computed.With constant terminal voltage being as the constrained condition,a direct search optimization algorithm is utilized to solve the object function that offers some advantages over the traditional iterative method in stability and flexibility.The paper gives the calculated terminal capacitances with respect to different loads under constant voltage operating condition.A good agreement between the calculated results and some experimental results demonstrates the validity of the proposed approach.