penny870718's profile - activity

I found that I made some mistakes, the problem is solved now. Thanks for your reply.

Hello everyone: I knowed that the power output of energy storage system in PSS/E is according to the value set in fdbd, but is it also related to the time when the system inertia ends after N-G fault? Because during the simulation, I found that the energy storage system seems to start to output active power after the inertia response ends. Is this because of the limitations of the three models of REECA, REGCA, and REPCA? Or is there something wrong with my parameter setting?

Sincerely, thanks.

Hello everyone: Now, I'm try to simulate a system with some fuel generators and one ESS. When I simulate N-G scenario with only two generators, the ESS and the other generator has abnormal response especially ESS. The ESS has about 1sec delay in this scenario. But it doesn't happen when the three generators are turned on and occur the same scenario. It make me quite confuse. Please can someone tell me why? Is this a limitation of PSS/E software? By the way the generator models which I used are DEGOV1, GENSAE, AC7B. The ESS models which I used are REPCA, REECA, REGCA.

After observation, I found that the energy storage system will not start real power until the inertia of the generator is used up. Is this correct?

Sincerely, thanks.

Thanks for your advice. I've try to set VFlag=1 and QFlag=1, but I still doesn't work. By the way the KP and KI for reactive power I set 0.75 and 2.5, Is it too small or not enough?

Is there any other flag that I should notice？

Yes, thanks for your help. I set PFFLAG = 0, FFLAG = 1, RefFlag = 0.

Yes. I have tried again to test the Q step and P step. Then P step is success, but Q step still failed. I tried the Q step test by changing "Qref" parameter in REPCAU1 this model's VAR(L+1), but it still doesn't work. Could you please tell me is there any mistake?

Yes, please can you tell me if I make any mistake ?

Hello everyone: I want to do P and Q step test in REPCA model, how should I do? I have tried change Qref and Pref by step, but it doesn't work. I have no idea, can someone tell me?

Sincerely, thanks.

Thanks a lot!

Hello everyone: I want to see the detail value of power flow data in diagram. Can psse diagram display the values in two decimal places? How to do it?

Sincerely, thanks

Oh, I see! Thanks for your advice, it's very useful!

Is local V control's reactive power output according to the voltage which is solved by the power flow at the local bus?

Hello everyone: I want to check the current limit logic in REEC model, so I want to check the Ipcmd and Iqcmd at the output of the REEC model, can someone tell me how to do it?

Sincerely, thanks.

Hello everyone： Now I'm trying to use REPCA、REECC, and REGCA models' reactive power control, but I don't know how local V control and Plant V control work in these models, please can someone tell me what is Local V control, and the different between Local V control and Plant V control? Why the voltage drop before I added fault when I use Local V control?

Sincerely, thanks.

Is there any python function in API can return VAR value?

Oh, I see. Thanks for your answer, it's really useful.

Could you tell me why have this error? By the way, I have checked the first VAR, the value is 239, so I think the first VAR of the model is 239, is it correct?

Which "status" I just key in the first VAR of the model that I've got by "psspy.windmind", and the "ident" I just key in a space, like ' '. The result of PSS/E just print "Invalid VAR index: <omitted value="">; value must be in the range 1 through 250000 (002502)".

I've try to use "psspy.var_channel" to get the VARs value. First, I use "psspy.windmind" to get first VAR of the model. Then, I use "psspy.var_channel(status, ident)" to get the VARs value.

So, if I add a fault in 1 sec, and clear fault in 0.2sec, final run to 20 sec, I can just get 1 sec's VARs, 1.2sec's VARs, and 20 sec's VARs, is it correct?Can I use "psspy.var_channel" to get the actual value of the VARs?