汽轮发电机不同运行条件下复杂非线性特性对比研究

以理论分析和有限元计算相结合的方法，以1台300MW汽轮发电机为例，系统研究了不同负载条件下的汽轮发电机的负载饱和特性。这些特性揭示了汽轮发电机的气隙电势与气隙合成磁势之间在不同条件下的复杂非线性关系。论文中分别对固定功率角，固定励磁电流等4种不同情况下的负载饱和特性进行了对比分析。结果表明，大部分运行条件下，由负载饱和特性决定的额定电压附近的气隙磁势都比按空载特性所决定的值大25~60%，个别情况下要大1倍以上。最后通过7.5kW模型机的实测结果验证理论分析和数值计算的正确性。

Research on Complex Nonlinear Characteristics of Turbo-generator Under Different Conditions

Through theory analysis and FEM calculation, load saturated characteristics of a 300MW turbo- generator under different operating conditions are studied. The complex nonlinear relationships of air-gap E.M.F and resultant M.M.F are discovered. Load saturated characteristics of four cases are compared and it finds that according to the new curves, the value of resultant current, corresponding to a given terminal voltage near rated value, may be 25-60% greater than that one determined by no-load curve and sometimes the discrepancy may reach to 100%. The theory analysis and FEM calculation are validated through the tests on a 7.5kW model machine.