General Discussion

I am looking to model wind turbines for the purpose of an insulation co-ordination study.

Due to the damping effect of  the transient overvoltages when there is a generator power flow into the wind farm network, I am unsure on most most accurate way to represent them.

Any help would be greatly appreciated

Hallo everyone,

I want to create a simple model in EMTP that has many almost identical parts. For example 100 capacitors in series, but each one with a different capacitance. Is there a way to quickly create this circuit with a script?

It is very tedious to double click on all devices and change each and every parameter every time there is a new model.

Cheers,

Ronald

Hello everyone!

My experience of EMTP usage is connected to investigation of electric railway system influence on metal structures located nearby railway overhead lines. I found that EMTP is the appropriate software program for railway system modelling, current distribution analysis (interfering current) and induced voltage calculation.

Compared with other similar software program, EMTP is easier to use: the user friendly desktop calculation allows fast modelling, calculation time is shorter and possibilities of result analysis are excellent.

The associated EMTP help link for BCTRAN Transformer Data Calculation has poorly formated formulas. Does anyone have a clean readable pdf of this help topic.

I have been studying DFIG based wind turbines.

I just want to know....

what are the improvements of the DFIG model in version 2.5 compared with the DFIG in version 2.4?

Thank you.

The CIGRE working group A2/C4.39 is finalizing an important report on the electromagnetic behaviour of power transformer. This long document (more than 300 pages) is titled : "Electrical transient interaction between transformers and the power system". It includes a lot of information on how transformers can be represented when modeling electromagnetic transients, but you can find also measurements on real transformers.

This document has been distributed for review in the study committee C4.

Hi All,

I am a beginner in HVDC simulation.

I want to simulate soft start-up of an AC passive network (long subsea cable). Where in the HVDC MMC model can we adjust/modify to have voltage ramp-up.?

Thanks in advance

Regards

Hello everyone,

                      I am doing a load flow study on a feeder. One of the bus in the feeder is PQ control type. Instead of doing load flow once,I need to do it multiple times changing P and Q with time to study loss on the feeder. I am wondering if anybody has an idea how to do that or similar script that can do that ?

Thanks in Advance

Dij

DJoshi

MSEE

Northern Plains Power Technologies

Hi everyone, 

I'm a fairly new user with very little EMTP usage experience. 

I would like to know if anyone has modeled Power Swing in EMTP for the purpose of testing the Power Swing blocking function in a relay. I am trying to do the following:

-  generate a power swing condition (1st stable and then OOS) and observe relay behavior. 
-  generate a fault during the power swing and observe the relays ability to differentiate between the power swing and trip only after it recognizes the fault.

I hope I have articulated myself apprpriately. 

In Emtp-RV,  with Icigre device, i only see positive value in Data tab and the wave shape of lightning current is positive lightning stroke.  So how can we model negative lightning stroke? (In fact,80% lightning stroke is negative)