一台并联于无穷大电网的同步发电机,在cosφ=1的情况下运行,此时若保持励磁电流不变,减小输出的有功功率,将引起:()。

A、功角减少,功率因素下降
B、功角增大,功率因素下降
C、功角减少,功率因素增加
D、功角增大,功率因素增加
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正确答案:

A

答案解析:

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