Historical Measurements and Load Profiles are two add-on modules for dpPower Analyzer.
Administration of these modules is done via Analyzer > Administrate load profiles.
Graphs of imported historical measurements and load profiles can be viewed for end customers by right-clicking delivery points or customer facilities. Aggregated values can be viewed by right-clicking cable boxes or secondary/primary substations.
Both historical measurements and load profiles can be used as input data in calculations.
For more information, see section Load profiles and Historical measurements.
Delete functions
Three different types of tables can be deleted by using the tab Administration. The same principle is used for all the three functions but with slightly different interface depending on the function.
All the functions with Truncate table for XXXX works in a similar way.
Delete data from load profile
Truncate table for load profiles:
1.Press the button Truncate table for load profiles and a dialog opens.
2.The number of rows that will be deleted is retrieved and you have the possibility to select Yes to continue or No to cancel the function.
Delete by selection:
1.Press the button Delete by selection and a dialog opens.
2.When a selection has been made, press the button Delete in order to delete the rows or Cancel to cancel the function.
Delete data from historical measurements
Truncate table for historical measurements:
1.Press the button Truncate table for historical measurement and a dialog opens.
2.Select which table you wish to truncate or use the cross in the top right corner to cancel the function.
Delete by selection:
1.Press the button Delete by selection and a dialog opens.
2.When a selection has been made, press the button Delete in order to delete the rows or Cancel to cancel the function.
Delete data from station measurement
The Delete Manager dialog opens.
Here are two choices for deletion:
•Delete loaded measured values in stations / transformers.
Deletion takes place only of the measured values that are loaded from the measured value system.
•Delete calculated values in stations / transformers.
Deletion takes place only of calculated values. For calculations with historical values, a summary is made to the feeding point, transformer or station depending on the calculation assumptions. This function is intended for deleting sum values.
Scale hourly value loads when calculating
Percentage up- or down scaling of hourly value loads can be done by a setting in the parameter form. Note that it is load factor power % that affects hourly value effects when calculating with load profiles or historical hourly values.
If no scaling is to take place, the value must be 100 (%).
Use extreme values in calculation
You can use extreme values as the basis for your calculation instead of running a full-hourly analysis over an entire time interval. This reduces the number of simulated hours and focuses on the most critical time points.
For the Load flow and fault analysis (balanced) calculation type, the option Use extreme values in the calculation is available. This function identifies local peaks and troughs individually for each delivery point, building a worst-case scenario where different end customers reach their maximum or minimum load at different times. This reduces the number of calculated hours without missing local critical loads.
1.Once you have traced the network, select the Load tab.
2.In the Type field, select either Historical measurements or Load profiles.
3.Check the Use extreme values in the calculation check box. The system automatically identifies the highest and lowest hourly values for each delivery point. The calculation is performed only for these hours.
For the calculation types Load flow and fault analysis (unbalanced) and Production calculation, the option Use peak value in the calculation is always enabled and cannot be unchecked. This function focuses on a single point in time where the whole network is expected to have a peak value. This provides an efficient way to evaluate the network’s capacity under a critical load condition without simulating multiple time points.
Show loads and temperature profiles in charts
The charts can be used to review and verify that the correct loads and temperature data will be used in the calculation. This makes it easier to ensure that the input data is correct before starting the calculation.
1.Once you have traced the network, select the Load tab.
2.In the Type field, select either Historical measurements or Load profiles.
oShow loads in charts:
a.Press Show loads in chart 
. A chart opens showing the loads used in the calculation, based on load profiles or historical measurements.
oShow temperature in chart:
a.If you have selected Load profiles as the type, open the More fields section.
b.Press Show temperature set . A graph opens showing the temperature progression over time.
Limitations when tracing alternative feeding routes
When using the Trace alternative feeding routes function, certain functions in the Load tab, Type - Historical measurements and Load profiles are disabled.
•Find peak is disabled because peaks may occur at different times for different feeding routes.
•Show loads in chart is disabled because the loads will differ between feeding routes.
•Save results for all hours is disabled because only the last calculation is saved when tracing alternative feeding routes.