| 摘要 |
PURPOSE:To accurately control the electric power of an AC system by taking the power loss of a transformer, converter, and transmission line into account at the time of controlling the constant power of an AC-DC interconnected system. CONSTITUTION:A computing element 8a finds a correcting value by substituting a DC voltage Edc on a forward converter side, DC voltage Vin on reverse converter side, and DC current Idc into an equation, correcting value=(Edc-Vin)Idc, and an adder 9 takes the sum of the correcting value found by the element 8a and a power value Pref set by means of a power setter 6. A divider 7 finds a DC current setting value Iref by dividing the sum of the correcting value and power value Pref by the DC voltage Edc on the forward converter side.
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