Overview
This library is required in order to run PSCAD cases generated by E-Tran, but can also be used directly in user-built cases.
The E-Tran Runtime Library for PSCAD contains the following models:
- Transformers (including impedance correction factors)
- Phase Shifters (leading or lagging)
- DC link (Back-Back and Point-Point, including built-in or external controls)
- Loads (constant PQ, current, impedance and RLC)
- Switched Shunt devices
- Simple transmission lines (PI section)
- Generator (simple source based on R, X source impedance)
- Measurement Components (fundamental frequency RMS V, PQ etc… with online animated viewing)
All models accept the identical data required in PSS/E (ie RXB in Per Unit, Voltages in L-L, kV, RMS, 3 phase MVa…) and have been tested against the steady state results generated by PSS/E.
Download the ETRAN Library for PSCAD
Download Links
After downloading the Runtime Library file, it should be unzipped and placed in a convenient location on your computer. There are two folders contained within it: the PSCADLib folder contains the PSCAD substitution libraries and the EMTDCLib folder contains the E-TRAN .lib files for various Fortran compilers.
Example 1
The first image shows a portion of a network near a bipolar HVDC converter station The circuit is loaded in PSCAD V4 and was directly generated by E-Tran from a PSS/E .raw input file. (Click on the image to download a higher resolution picture.)
The original circuit was more than 18,000 busses, but, for this example, E-Tran directly translated only 1 bus away (which resulted in a 15 bus circuit) from the HVDC bus and formed a network equivalent of the remaining circuit.
The second image shows the equivalent network on a sub-page. The voltage magnitude and phase angle of the equivalent sources are automatically calculated to match the power flow of the solved loadflow. Note the multi-port equivalent is valid for steady state as well as for open/short circuit conditions.
E-Tran converted the circuit, using only the PSS/E .raw file, directly into a PSCAD Version 4 .psc file in three phase Single Line Diagram (SLD) format.
Frequently Asked Questions
Currently, versions 23-26, 29, 30, 31, 32, 33, and 34 are supported.
E-Tran can generate three-phase Single Line Diagram (SLD) circuit .psc or .pscx files for PSCAD V4.2, and x4.6.
Check that the .raw file being used is “solved” and has the updated loadflow solution saved in it. Also check that fundamental frequency behaviour of any models in the E-Tran Substitution Library match that of the standard E-Tran components (If you turn off the Substitution Library, does the solution then match?). Finally, check DC links to see if they are operating correctly. The DC link controls may have to be adjusted to work in very weak systems (If you use the “Infinite Bus” option in the DC link component, does the loadflow then match?
Detailed EMT models (such as transformers with saturation, frequency dependent transmission lines) are essential for any meaningful study (especially for over-voltage, harmonic studies?). E-Tran supports a Substitution Library which allows a user to enter the detailed model data maintaining/managing the data in a PSCAD library and will automatically use the detailed data if it is available. The fundamental frequency impedances from the loadflow file are used to generate multi-port network equivalents, and, to determine the steady state powerflow. The powerflow is used to initialize all machines, sources, generators or any device. E-Tran will automatically modify the initial condition information of machines found in the Substitution Library (which in turn will initialize any exciter, governor, multi-mass system), and in general can provide initial conditions for any device. This means E-Tran can directly generate a circuit ready for EMT studies, complete with frequency dependent lines, detailed generator/exciter/governor models, detailed HVDC/SVC/FACTS devices etc. providing that the user has entered this data once in a library.
The PSCAD Master library models performs RMS or instantaneous PQ measurement (for example, the sum of VA.IA + VB.IB + VC.IC etc.), which includes the effect of all sequence components and the effect of harmonics. The E-Tran PQ measurements devices (or voltage measurements) measure the +ve sequence, fundamental frequency quantities (used in loadflow programs), not the instantaneous or RMS quantities. This effect is particularly obvious at locations where there are significant harmonics (such as near a commutating model of a DC link). If the instantaneous quantities being measured are sinusoidal, distortion free and balanced (i.e., only +ve sequence), the results should match.
You can visit http://www.electranix.com/software or you can send e-mail to the Electranix Corporation.
You can visit http://www.PSCAD.com or you can send e-mail to the PSCAD Support team at support@PSCAD.com . PSCAD is developed and supported by the Manitoba HVDC Research Centre Inc (http://www.hvdc.ca).
The E-Tran program is always under development. Future releases will translate transient stability data in addition to the loadflow data and will form dynamic equivalents. These will include the effects of machine inertia and controls in the network equivalents. We also plan to support additional input formats (in addition to the PSS/E .raw format). If you have any ideas or suggestions for improvements to E-Tran, please send them to us.
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A trial of our suite of software tools is available to try free of charge, if you’d like to request a free trial, please contact e-tran@electeanix.com.
Releases
All minor releases and patches will be available for E-TRAN users holding a software license. Future major releases of E-TRAN will be available at a discounted price to current users.
License Manager
Our software use the Electranix License Manager, which can administer licenses across your network for E-Tran,E-Trn Plus and E-SCREEN
Discounts
Discounts may be available for any additional licenses held by the same organization.
E-TRAN for PSS/E users
Electranix has partnered with Siemens/PTI to offer E-TRAN technology integrated with the PSS®E platform. E-Tran (PSS®E-PSCAD Data Conversion Module) and E-Tran Plus for PSS/E (PSS®E-PSCAD Co-Simulation) trial licenses and quotations may be requested through the following form on PSS®E site.
