| 摘要 |
A method and apparatus are disclosed for determining a system charging current in an electrical power system having three phases, a ground, a neutral, and a neutral resistor electrically coupling the neutral to the ground. The method comprises: measuring a line voltage of each phase; measuring a line-to-neutral voltage of each phase; determining a charging capacitance of each phase based on the line voltage of each phase, the line-to-neutral voltage of each phase, a frequency of the electrical power system, and a value of the neutral resistor; determining a phase charging current for each phase of the electrical power system based on the charging capacitance of each phase, the line voltage of each phase, and the frequency of the electrical power system; and determining the system charging current based on the phase charging current for each phase.
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