电力系统母线保护存在的主要问题，是电流互感器的饱和问题。

Saturation of Current Transformer is the major problem of Bus Protect in power system.

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电力系统母线保护存在的主要问题，是电流互感器的饱和问题。

Saturation of Current Transformer (ct) is the major problem of Bus Protect in power system.

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基于GPS的同步相量测量单元(PMU)实现了电力系统的功角或母线电压相角直接可测。

GPS-based synchronized phasor measurement unit (PMU) can measure the power Angle or phase Angle of bus voltage directly.

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