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 | 1 | initial version |
For dynamic studies a better way is to use load shedding model from the PSSe standard library, LDSHxx. This model is added to the dyr file with no need for programming code. The model, with three-stage shedding, allows triggering voltage values, delay of relay, delay of breaker and fraction of load to be shed.
| | 2 | No.2 Revision |
For dynamic studies a better way is to use the voltage load shedding model from the PSSe standard library, LDSHxx. LVSHxx. This model is added to the dyr file with no need for programming code. The model, with three-stage shedding, allows triggering voltage values, delay of relay, delay of breaker and fraction of load to be shed.shed. An example applicable to all loads in an area follows:
/ Area,'LBSHAL',Lid,JBUS, v1,t1, f1, v2,t2, f2, v3,t3, f3,tb,/TO-Station name
1,'LVSHAR','*', 0,0.93, 8,0.15,0.91, 5,0.25,0.87, 2,0.35,0.0833,/all loads in area 1
| | 3 | No.3 Revision |
For dynamic studies a better way is to use the voltage load shedding model from the PSSe standard library, LVSHxx. This model is added to the dyr file with no need for programming code. The model, with three-stage shedding, allows triggering voltage values, delay of relay, delay of breaker and fraction of load to be shed. An example applicable to all loads in an area follows:
/ Area,'LBSHAL',Lid,JBUS, v1,t1, f1, v2,t2, f2, v3,t3, f3,tb,/TO-Station name
1,'LVSHAR','*', 0,0.93, 8,0.15,0.91, 5,0.25,0.87, 2,0.35,0.0833,/all loads in area 1
The above example does not cover the condition of reconnecting the load after a fixed time, nor the case of dropping load on overvoltage. You will need to add such 'functions' programmatically, since I am now aware of a specific model in the standard model library for those conditions. A user-defined model for this SPS-like behavior (a reclosure of load) could be the solution, unfortunately, a much more difficult task to do.
| | 4 | No.4 Revision |
For dynamic studies a better way is to use the voltage load shedding model from the PSSe standard library, LVSHxx. This model is added to the dyr file with no need for programming code. The model, with three-stage shedding, allows triggering voltage values, delay of relay, delay of breaker and fraction of load to be shed. An example applicable to all loads in an area follows:
/ Area,'LBSHAL',Lid,JBUS, v1,t1, f1, v2,t2, f2, v3,t3, f3,tb,/TO-Station name
1,'LVSHAR','*', 0,0.93, 8,0.15,0.91, 5,0.25,0.87, 2,0.35,0.0833,/all loads in area 1
The above example does not cover the condition of reconnecting the load after a fixed time, nor the case of dropping load on overvoltage. overvoltage (?? as your code suggest). You will need to add such 'functions' programmatically, since I am now aware of a specific model in the standard model library for those conditions. A user-defined model for this SPS-like behavior (a reclosure of load) could be the solution, unfortunately, a much more difficult task to do.
