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Sequence Calculator

Oct 17, 2013 at 6:43 PM
Is there a document explaining how to use the Sequence Calculator Adapter?

Oct 23, 2013 at 3:24 PM
Hi Renan,

The sequence calculator adapter requires six measurements as input and six measurements as output. Before setting up the adapter itself, you should use the Manage > Measurements page in the Manager to create the six output measurements. The output measurements are:
  • Positive Sequence Magnitude
  • Positive Sequence Angle
  • Negative Sequence Magnitude
  • Negative Sequence Angle
  • Zero Sequence Magnitude
  • Zero Sequence Angle
When defining the output measurements for the adapter, make sure they are specified in the above order.

As for inputs, the adapter expects three phasor magnitudes and three phase angles. It expects that all magnitudes and angles be of the same type (voltage/current) and that the measurements are specified in order by phase (A, then B, then C). They do not need to be in order by type, so you can specify all your magnitudes before your angles, all your angles before your magnitudes, group them by phase, or whatever so long as the phases for each type are in order.

Once you've tracked down all your measurements, you can set up the adapter on the Custom Action Adapters page. Required parameters are FramesPerSecond, LagTime, LeadTime, InputMeasurementKeys, and OutputMeasurements. These parameters are explained in the Adapter Connection Strings documentation page.

Marked as answer by ritchiecarroll on 11/1/2013 at 11:40 AM
Oct 23, 2013 at 5:57 PM
Hello Stephen,

I created the 6 new measurements using Manage -> Measurements.

I used Adapters -> Action Adapters ; Selected clear for a new Adapter; Named it SeqCalc1; Type = Sequence Calculator;
It only offers 7 parameters to be configured: FramesPerSecond, LagTime, LeadTime, Dependecies, DependencyTimeout, SampleSize and TrackRecentValues.

Where do I find InputMeasurementKeys and OutputMeasurements ?

Oct 23, 2013 at 6:39 PM
Even if a connection string parameter doesn't show up in the parameters list, you can enter it into the connection string manually using the text box below the parameters list. Additionally, once a parameter has been entered manually into the connection string, it will automatically show up in the parameters list just like any other parameter. It may be easiest if you just type "InputMeasurementKeys=" into the connection string text box and then modify the parameter using the parameters list.

Also, the absence of InputMeasurementKeys and OutputMeasurements on the Custom Action Adapters page has been fixed in later versions.