ifference between revisions of "EMO:Powerflow Case Concepts"
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More on Swing Nodes
When a Powerflow analysis is conducted, the profiled Generation and Demand figures from the Case Definition are used along with the Transmission System configuration to estimate flows in the Circuits. Any energy imbalance in the results is 'absorbed' at one or more selected swing nodes. When there is more than one Swing Node specified the imbalance is absorbed in proportion to the Demand at each of the Swing Nodes, e.g. if the imbalance is +20MW with two Swing Nodes carrying 60MW and 40MW, the first Node will carry +12MW of the imbalance and the second +8MW. This method allows the imbalance to be modelled by effectively ramping Demand up or down over a large region. If none of the Swing Nodes have Demand the imbalance is shared equally between the Nodes.
If none of the selected Swing Nodes are connected to the Transmission System in a Trading Period an automatically chosen Node will be used and an infeasibility message will be generated.