Vikas07's profile - activity

In WECC generic models, PLL transients are ignored. The PSSE model REGCA1 includes wind turbine generator aspects associated with handling of variations in voltage angle. In this model converter control functions are represented using simplified features for regulation of both real and reactive current. REGCA1 model receives real and reactive current commands from the electrical control model (REECA1). The internal voltage source is then referred back within the network solution, where the terminal voltage is referenced to the swing bus in the load flow. The phase locked loop (PLL) function is used to synchronize the phase angle of the generator with the terminal voltage phase angle. As Figure 8-1 indicates, WECC renewable energy generator/converter model does not have detailed control functionality related to PLL and model assumes perfect synchronization of the phase angle of the generator with the terminal voltage phase angle. Therefore, WECC generic model does not capture the actual WTG response to the voltage angle changes. Any inputs on this ?

Can anybody please explain how VAR(L) i.e." wref1, Reference in reactive path (pu on MBASE) " in REAX3BU1 model is getting computed after intialization. Thanks in advance

Thanks for the reply. I know the maximum converter current limit of the inverter. Eg. 1.068 pu. Can i define all the impedance parameters as 1/1.068 = 0.9363 pu ?

In PSSE, while modeling solar inverter as a machine for steady state. How do you define the parameters like X source , Subtransient,Transient,Synchronius, Zero and Negative impedance while modeling ? What values to be considered ? Thanks in Advance

The query is , whether the above methology is correct to find critical clearing time in PSSE. How the critical clearing time is computed in PSSE ?

For computing, critical clearing time for generating station in a grid network. I am applying bolted fault at generator bus in an iterative manner until the angle of the generator fails to reach its pre-fault value i.e. loses synchronism. The generator speed also reflects the same in the simulation. Any other factor to be considered for evaluation ? How does critical clearing angle comes into picture in this process ? It was also observed that even if generation in the nearest generators is varied in load flow. The ciritical clearing time still remains the same , Any observations in this regard ? Thanks in advance

Thanks for the tool. Can you share the redirect module please. I'm getting error of no module named redirect for the dmview.py file and TOOLS\FS.py file.

Thanks , But for the benefit of all, the CON value Kc defines the slope setting for PPC in voltage control Regards

A couple of questions on modelling short and equivalent generator for short circuit analysis. 1) How to derive the max short circuit MVA at a bus. 2) The Zth is available , but how to get X0/X1 ratio for representing zero and positive seq reactance in SC paramter of generator. Thanks in Advance

To calculate fault level at different buses in the plant network. How to model infinite bus generator to represent SCR and X/R ratio. Also whether short cicruit impedances are required for infinite bus generator and what to consider? Thanks in advance

The slope setting in PPC operating in Voltage control is reflected by which CON value/s of REPCTA1 model? eg. if the slope setting is changed from 0.1 to 0.05 in PPC at site, how to reflect the same in PSSE. Thanks in advance