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machine modeling in steady state for solar inverter

asked 2020-10-10 03:50:51 -0600

Vikas07 gravatar image

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

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answered 2020-10-10 05:39:21 -0600

Based the fault current contribution from Inverter (typically 1.1 times the inverter rated current), the Impedance can be calculated and parameters like X source , Sub transient, Transient, Synchronous reactance shall be kept Identical in this case.

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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 ?

Vikas07 gravatar imageVikas07 ( 2020-10-10 07:58:42 -0600 )edit

Yes, exactly. You can use the same parameters for PV inverter in the steady state model.

Berwin gravatar imageBerwin ( 2020-10-11 03:03:15 -0600 )edit

answered 2020-10-10 06:26:17 -0600

ffl gravatar image

Xsource is usually set at a very large value e.g. 9999 p.u. However, please note that manufacturer's data of inverter shall be consulted before doing the modeling work. They typically provide modeling procedure of inverter for PSS/E steady-state and dynamic studies. An Aspen Oneliner modeling note is also given for short-circuit studies as well.

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Asked: 2020-10-10 03:50:51 -0600

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Last updated: Oct 10 '20