Release Notes

Details of new features & fixes across the ERACS versions.

 

ERACS Version 3.5.0 - Released: 15/06/2005


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Features:

GE Wind Turbine Model Version 3.5.0 : Feature Note-3 15/06/2005

DFIG model for the GE wind turbine now available.


Manuals Version 3.5.0 : Feature 2802 15/06/2005

Technical Manual and User Guide have been updated.


Governor Rating Version 3.5.0 : Feature 2792 15/06/2005

ERACS now allows the power rating of a generator's governor/prime mover to be specified. Previous to this enhancement, ERACS assumed that the governor rating was the same as the generator's MW rating.


Harmonic Distortion Version 3.5.0 : Feature 2786 15/06/2005

Harmonic distortion is now calculated for polluting sources.


Protection Device Status Version 3.5.0 : Feature 2750 15/06/2005

In order to make the identification of protection devices whose status has been set to off much clearer, a feature has been included that allows the identifier of such devices to be shown in grey. A control has been added to the Tools|Options|Appearance dialog that enables this feature to be disabled.


Database Check Version 3.5.0 : Feature 2741 15/06/2005

When a new network is created, or when a network is imported, a check is made to determine whether the network will be placed in the ERACS example networks database (ERACSNetworks). If the check is positive then a warning message is presented. The check has been included as this database may be updated by the ERACS Team at a future update and will be deleted when ERACS is uninstalled.


Core Type Transformers Version 3.5.0 : Feature 2705 15/06/2005

A model for core-type 2 winding transformers that are connected star to grounded-star (or vice versa) has been included. This model enables the zero sequence representation of this type of transformer connection to be represented more accurately.


Harmonics G5/4 Version 3.5.0 : Feature 2679 15/06/2005

A new program option called 'G5/4' has been added to the ERACS suite. Engineering Recommendation (ER) G5/4 sets the planning levels for harmonic voltage distortion to be used in the process for the connection of non-linear equipment to the public electricity system within the United Kingdom. The G5/4 calculation implemented in ERACS will calculate voltage distortion and harmonic currents flowing at the point of common coupling (PCC) as a result of the connection of non-linear loads. These voltage distortion and harmonic currents are subsequently compared against the planning levels specified in ER G5/4 and are presented in a tabular format.


Busbar Voltage Waveforms Version 3.5.0 : Feature 2679 15/06/2005

As a result of the new G5/4 option a new library element has been added called 'Measured Voltage Distortion'. Data is entered in a tabular form and may be viewed as a waveform. The waveforms are then selected and viewed via the Busbar data entry form. Although primarily intended for use with the G5/4 option this facility lends itself to being a depository for power quality and harmonic survey data.


E-Mail Database Version 3.5.0 : Feature 2636 15/06/2005

A selection labeled "Send Zip Archive to ERA" has been added to the form displayed when a database or library is zipped. If the selection is made the zipped database or library will be attached to an e-mail, addressed to ERA.


Transparent Text Version 3.5.0 : Feature 2446 15/06/2005

Facilities have now been included that enable you to toggle whether diagram text is transparent. This property is applied to text on-screen and when printed out.


Rotate Text Version 3.5.0 : Feature 1672 15/06/2005

Added on-screen text may now be rotated.


Harmonic Profile Version 3.5.0 : Feature 1623 15/06/2005

An option has been added to display output from the harmonic injection and G5/4 programs in the following forms: periodic waveforms, phasor diagrams, magnitude spectrums and phase spectrums.




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