"No Network Solution After Fault Applied."
"No Network Solution After Fault Removed."
"No Network Solution After Transferring ATS."
"No Network Solution After Opening Contactor."
"No Network Solution During Run Simulation."
"No Prelim Solution At End of Initialization."
"No Solution After Opening Device."
"No Solution After Closing Device."
"No Fault Clearing Power Flow Solution on DS Reset."
"No Initial Power Flow Solution on DS Reset."
"No Initial VCN Solution on DS Reset."
"No Power Flow Solution on DS Entry."
"No VCN Solution on DS Entry."
Description – All of these messages involve solution and conversion of the network model. To enter the Dynamic Stability focus, there must be a properly solved and converted power flow case. The case must first solve using the same technique used in the Power Flow focus, and then it is converted to a VCN (voltage controlled network) and solved again. The standard Power Flow focus solution technique models generators as swing and voltage controlling sources, and motors as static loads. Conversion to a VCN is accomplished by changing all sources (generators, utilities and motors) to Thevenin equivalent voltage sources, and having all other loads modeled as constant impedance static loads (constant current and MVA loads are converted to constant impedance). During initialization or runtime, if the network cannot be solved, an error is generated and the simulation terminated.
| Dynamic Stability | |
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