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Hi, I am modeling an BESS and with one load and one normal generator, using REGCA1 and REECCU model, but after a short disturbance, the system frequency seems not going back to 60Hz, (the non disturbance test will get a flat result), in the output bar there isn't any specific error message, is there any document to check or suggesting in this kind of situation?

Or trying to adjust the parameter according to the transfer function in "MODELS" and the parameter range according to "WECC Type 4 Wind Turbine Generator Model – Phase II" is the right move?

Any suggestion will be much appreciate!

The dynamic parameter is as below:

1,'GENROU',1 6.00 0.05 0.535 0.05 3.33 0.67 1.72 1.66 0.23 0.37 0.21 0.10 1.01 1.02 /

1 'IEEET1' ,1 0.0000 20.000 0.20000 8.535732 -8.535732 1.0000 0.31400 0.63000E-01 0.35000 0.0000 2.8000 0.30338 3.7300 1.2884 /

// governor

1, 'IEESGO', 1, 25.0, 0,1.0,1.0,12.5, 0, 5.0,3.0,0.5, 1.0, 0,/

2,'USRMDL',1,'REGCAU1',101,1,1,14,3,4, 1, 0.02,10.0,0.9,0.5,1.22, 1.2,0.8,0.4,-1.3,0.02,0.7,9999.0,-9999.0,1.0, / Generic RE Converter model

2,'USRMDL',1,'REECCU1',102,0,5,45,7,6, 0,0,1,0,0, -99.0,99.0,0.0,-0.05,0.05,0.0,1.05,-1.05,0.0,0.05, 0.436,-0.436,1.1,0.9,0.0,0.1,0.0,40.0, 0.02,99.0,-99.0,1.0,0.0,1.82, 0.02,0.0,0.0,0.0,0.0,0.0, 0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0, 100.0,1.0,1.0,0.0, /

Electrical Control Model for Utility Scale Battery Energy Storage

Hi, I am modeling an BESS and with one load and one normal generator, using REGCA1 and REECCU model, but after a short disturbance, the system frequency seems not going back to 60Hz, (the non disturbance test will get a flat result), in the output bar there isn't any specific error message, is there any document to check or suggesting in this kind of situation?

Or trying to adjust the parameter according to the transfer function in "MODELS" and the parameter range according to "WECC Type 4 Wind Turbine Generator Model – Phase II" is the right move?

Any suggestion will be much appreciate!

The dynamic parameter is as below:

1,'GENROU',1 6.00 0.05 0.535 0.05 3.33 0.67 1.72 1.66 0.23 0.37 0.21 0.10 1.01 1.02 /

1 'IEEET1' ,1 0.0000 20.000 0.20000 8.535732 -8.535732 1.0000 0.31400 0.63000E-01 0.35000 0.0000 2.8000 0.30338 3.7300 1.2884 /

// governor

1, 'IEESGO', 1, 25.0, 0,1.0,1.0,12.5, 0, 5.0,3.0,0.5, 1.0, 0,/

2,'USRMDL',1,'REGCAU1',101,1,1,14,3,4, 1, 0.02,10.0,0.9,0.5,1.22, 1.2,0.8,0.4,-1.3,0.02,0.7,9999.0,-9999.0,1.0, / Generic RE Converter model

2,'USRMDL',1,'REECCU1',102,0,5,45,7,6, 0,0,1,0,0, -99.0,99.0,0.0,-0.05,0.05,0.0,1.05,-1.05,0.0,0.05, 0.436,-0.436,1.1,0.9,0.0,0.1,0.0,40.0, 0.02,99.0,-99.0,1.0,0.0,1.82, 0.02,0.0,0.0,0.0,0.0,0.0, 0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0, 100.0,1.0,1.0,0.0, /

Electrical Control Model for Utility Scale Battery Energy Storage

Hi, I am modeling an BESS and with one load and one normal generator, using REGCA1 and REECCU model, but after a short disturbance, the system frequency seems not going back to 60Hz, (the non disturbance test will get a flat result), in the output bar there isn't any specific error message, is there any document to check or suggesting in this kind of situation?

Or trying to adjust the parameter according to the transfer function in "MODELS" and the parameter range according to "WECC Type 4 Wind Turbine Generator Model – Phase II" is the right move?

Any suggestion will be much appreciate!

The dynamic parameter is as below:

1,'GENROU',1 6.00 0.05 0.535 0.05 3.33 0.67 1.72 1.66 0.23 0.37 0.21 0.10 1.01 1.02 /

1 'IEEET1' ,1 0.0000 20.000 0.20000 8.535732 -8.535732 1.0000 0.31400 0.63000E-01 0.35000 0.0000 2.8000 0.30338 3.7300 1.2884 /

// governor

1, 'IEESGO', 1, 25.0, 0,1.0,1.0,12.5, 0, 5.0,3.0,0.5, 1.0, 0,/

2,'USRMDL',1,'REGCAU1',101,1,1,14,3,4, 1, 0.02,10.0,0.9,0.5,1.22, 1.2,0.8,0.4,-1.3,0.02,0.7,9999.0,-9999.0,1.0, / Generic RE Converter model

2,'USRMDL',1,'REECCU1',102,0,5,45,7,6, 0,0,1,0,0, -99.0,99.0,0.0,-0.05,0.05,0.0,1.05,-1.05,0.0,0.05, 0.436,-0.436,1.1,0.9,0.0,0.1,0.0,40.0, 0.02,99.0,-99.0,1.0,0.0,1.82, 0.02,0.0,0.0,0.0,0.0,0.0, 0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0, 100.0,1.0,1.0,0.0, /

Electrical Control Model for Utility Scale Battery Energy Storage

Update:

Actually, my goal is to introduce a signal through BESS, and see how the system works, so at first I try to introduce a simple signal like step function, but the system frequency didn't recover to 60Hz as I thought.

So I also tried to do the dynamic simulation with a bus fault at the GENROU side for 0.5 sec then clear the fault, but the system frequency didn't recover also, so I thought the system might be unstable.

Is there any way to bring the frequency to the normal operation level? Will disable the primary frequency control be possible or is there any model are not speed droop models.

Thanks for your reply! really helps me to understand the theory behind.