| 摘要 |
<p>A substation of an electricity grid system is provided. The substation connects two grid parts operating at different frequencies and/or voltage levels, and comprises means for monitoring a parameter indicative of the electricity available from and/or the electricity required by, one or both of the two grid parts. It also includes responsive flow control means for controlling the flow and electricity between the two grid parts, in response to the parameter of one or both of the two grid parts. The means for monitoring is configured to derive the parameter of one or both of the grid parts from an integration of a frequency of said one or both of the grid parts since a reset point.</p> |
