It should have left Earth on Friday but has been held on the ground because of an electrical failure in a switchbox connected to a hydraulics power unit.
它本应在星期五离地，但是现在还留在地面，因为与液压动力装置相连的一个开关箱发现有电气故障。
The results show that the harmonic pollution of power grid is the basic reasons leading to the unit interconnected failure and the proposed measure is effective.
结果表明，电网谐波污染是机组并网失败的根本原因，并验证了该措施行之有效。
Failure rate and average repair time of input-bus unit were calculated by state Spaces method. Power reliability indices of whole systems were computed by min-cut method.
该方法用状态空间法求解输入母线单元失效频率和平均修复时间，用最小割集法计算整个系统的供电可靠性指标。
AC fault security power source system is to provide alternating current for unit safety shutdown when power cut happens for a long time due to power grid failure or other reasons.
交流事故保安电源系统是当电网发生事故或其他原因致使火电厂厂用电长时间停电时，提供机组安全停机所必需的交流用电系统。
AC fault security power source system is to provide alternating current for unit safety shutdown when power cut happens for a long time due to power grid failure or other reasons.
交流事故保安电源系统是当电网发生事故或其他原因致使火电厂厂用电长时间停电时，提供机组安全停机所必需的交流用电系统。
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