That line has been beset by reliability problems since its opening, with a series of delays caused by power failures.

京沪高铁从开通起就不断受到可靠性问题困扰，电力故障导致了一些列车延误。

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When reactive power is unbalance, it will cause some problems, such as lower voltage, worsen voltage quality, lower power factor and increase line loss.

当无功功率不平衡时，将会导致系统电压降低、电能质量下降、功率因数降低、线损增加等问题。

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In the reconstruction of rural power network, there exist the problems of power consumption management, power consumption safety and line losses, etc.

在农村电网改造中，存在着偏远农户的用电管理、用电安全、线路损耗等问题。

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