In this model, running state of transmission line is divided into four states, and calculation method of state probability, state frequency and state duration in balanced state are given.
该模型将输电线路的运行状态划分为四种状态，给出了每种平稳状态的状态概率、状态频率和状态持续时间的计算方法。
The simulation results show that the power factor approaches to 1 (0.99) at stable state, and the exciting current control method and switches table in four quadrants are correct.
仿真结果表明在稳态时功率因数接近于1（0.99），验证了给出的励磁电流的控制方法、四象限开关表的正确性。
In the first part of this paper, the present research state of rotor dynamics and four types of computation method are introduced.
本文第一章主要介绍转子振动问题的研究现状，以及四种典型的计算分析方法。
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