Added no-load output voltage test for ballasts;
增加了镇流器空载输出电压测试；
All the generating units in the test could properly response the primary frequency regulation and maintain a stable load output.
参加试验的机组均能正确响应一次调频的动作，并且能够保持稳定负荷输出。
All the generating units in the test could properly response the primary frequency regulation and maintain a stable load output.
参加试验的机组均能正确响应一次调频的动作，并且能够保持稳定负荷输出。
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