User Activity

  • Posted a comment on discussion Open Discussion on OpenDSS

    One issue that I see is that the ptratio is 60, but the nominal voltage at the secondary of the tr1 transformer is 0.4 kV. It looks like you are trying to target 120V. A ptratio of 60 will be expecting to 'see' 7.2 kV LN on the winding the control is connected to. For the regcontrol as it's used in your case, the ptratio should be 0.23 kV (LN voltage) divided by .120 kV (nominal voltage in the regcontrol that you've defined) = 1.916666667. Once that change is made, I re-ran the circuit in the latest...

  • Posted a comment on discussion Help on OpenDSS

    I plotted the snapshot solution voltage profile. You likely plotted it after running 168 hours of solution time. A snapshot solution doesn't take into account the loadshapes. All the power conversion elements (loads, PVSystems, etc) are at their defined power value, given the voltage, so there were lower voltages due to the higher load level. The daily solution does take into account loadshape multipliers. See: https://opendss.epri.com/PowerFlow.html

  • Modified a comment on discussion Help on OpenDSS

    Hi, it looks like it is solving correctly. There are a couple of items that I added to the master file that were missing. First are the base voltages and a calcv statement. Then I added a snapshot solve. Third, I re-enabled the energymeter at the head of the feeder. Please see the attached master.dss with these changes. The inicio monitor is at the head of theLV feeder. The voltage there varies throughout the week, but is roughly 241 volts. The reason it is not 230V is because the source is at 1.05pu,...

  • Posted a comment on discussion Help on OpenDSS

    Hi, it looks like it is solving correctly. There are a couple of items that I added to the master file that were missing. First are the base voltages and a calcv statement. Then I added a snapshot solve. Third, I re-enabled the energymeter at the head of the feeder. Please see the attached master.dss with these changes. The inicio monitor is at the head of theLV feeder. The voltage there varies throughout the week, but is roughly 241 volts. The reason it is not 230V is because the source is at 1.05pu,...

  • Modified a comment on discussion Help on OpenDSS

    Please post the files that you have for the case that you are simulating. Preferably all together in a single ZIP file. It appears you have made more modifications to the European Low Voltage Test Feeder* than you are showing in this discussion thread. Or maybe there is a 'typo' in what you posted above. If I make only the changes that you indicate, I get closer to 330V LN for a snapshot solution at the secondary of the transformer. From the 'base' European Low Voltage Test Feeder files available*,...

  • Posted a comment on discussion Help on OpenDSS

    Please post the files that you have for the case that you are simulating. Preferably all together in a single ZIP file. It appears you have made more modifications to the European Low Voltage Test Feeder* than you are showing in this discussion thread. Or maybe there is a 'typo' in what you posted above. If I make only the changes that you indicate, I get closer to 330V LN for a snapshot solution. From the 'base' European Low Voltage Test Feeder files available*, you have increased the source base...

  • Modified a comment on discussion Open Discussion on OpenDSS

    Hi Kirn, I think I see at least one issue. You are indicating these are single-phase loads. But the bus definitions don't include the node (phase) that you are connecting them to. Please try the following: ...Bus1=B2.1 ...Bus1=B2.2 ...Bus1=B2.3 Please let us know if that fixes the issue. Also if your voltage is going below 0.75pu or above 1.10 pu it will change to a constant impedance load. But I doubt that is happening here.

  • Posted a comment on discussion Open Discussion on OpenDSS

    Hi Kirn, I think I see at least one issue. You are indicating these are single-phase loads. But the bus definition don't include the node (phase) that you are connecting them to. Please try the following: ...Bus1=B2.1 ...Bus1=B2.2 ...Bus1=B2.3 Please let us know if that fixes the issue. Also if your voltage is going below 0.75pu or above 1.10 pu it will change to a constant impedance load. But I doubt that is happening here.

View All

Personal Data

Username:
wsunderm1
Joined:
2010-07-08 13:57:11

Projects

This is a list of open source software projects that wsunderm1 is associated with:

  • Project Logo OpenDSS EPRI Distribution System Simulator Last Updated:

Personal Tools