Difference between revisions of "EMO:Use of line conductor information in SFT"

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The behaviour of SFT constraints is now derived from information about the thermal characteristics of the lines involved.  The information required by EMO to do this derivation is contained in two files, the Conductor Parameters file and the Circuit Configuration file
 
The behaviour of SFT constraints is now derived from information about the thermal characteristics of the lines involved.  The information required by EMO to do this derivation is contained in two files, the Conductor Parameters file and the Circuit Configuration file
  
−
==Conductor Parameters File==
+
==Conductor Parameters==
  
 
The Conductor Parameters file contains information on the properties of the different types of conductors used in transpower lines. This is a csv file with a heading line and the following columns
 
The Conductor Parameters file contains information on the properties of the different types of conductors used in transpower lines. This is a csv file with a heading line and the following columns
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:Physical heat capacity, the amount of energy contained in a temperature rise in the cable material
 
:Physical heat capacity, the amount of energy contained in a temperature rise in the cable material
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|}
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==Circuit Configuration==
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This describes the configuration of the circuit with regard to the cable type and number and the offload time used.
 +
 +
The Conductor Parameters file contains information on the properties of the different types of conductors used in transpower lines. This is a csv file with a heading line and the following columns
 +
 +
{|class="wikitable"
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! Column !! Meaning
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|-
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!Branch Id
 +
|
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:The branch id is used as the name of the circuit in EMO
 +
|-
 +
!Date
 +
|
 +
:The date from which the information in the row is valid.  If this column is empty the information is valid from teh earliest date possible
 +
|-
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!Limiting Conductor
 +
|
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:the name of the cable type used in the conductor that sets the thermal limit of the line.  This name needs to appear in the conductor code column in the Conductor Parameters file
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|-
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!Number of Conductors
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|
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:the number of conductors used in the line.
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|-
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!SFT_Status (Y/N)
 +
|
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:whether to apply SFT to theis line
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|-
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!Offload time (minutes)
 +
|
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:the SFT offload time, or time window in which a thermal overload can occur.
 +
|-
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!Threshold
 +
|
 +
:The threshold after which the constraint will be shown by EMO. This is expressed as a percentage of the constraint limit.
 
|}
 
|}

Revision as of 11:42, 21 December 2015

The behaviour of SFT constraints is now derived from information about the thermal characteristics of the lines involved. The information required by EMO to do this derivation is contained in two files, the Conductor Parameters file and the Circuit Configuration file

Conductor Parameters

The Conductor Parameters file contains information on the properties of the different types of conductors used in transpower lines. This is a csv file with a heading line and the following columns

Column Meaning
Conductor Code
This is the code used to identify this type of cable
Conductor Description
a description, for reference only
Absorbivity
Average absorbance, the proportion of incoming radiative energy that is absorbed over naturally occurring frequencies
Coefficient of Resistance
The rate of change in resistance as temperature is increased
Resistance @20 C ohms/km
Electrical resistance
Mass per unit lemgth gm/cm
The mass or weight of the cable
Diameter mm
Diameter of the cable
Emissivity
Physical emissivity, which determines the rate at which heat is lost through radiation
Specific Heat Capacity Cal/g/C
Physical heat capacity, the amount of energy contained in a temperature rise in the cable material

Circuit Configuration

This describes the configuration of the circuit with regard to the cable type and number and the offload time used.

The Conductor Parameters file contains information on the properties of the different types of conductors used in transpower lines. This is a csv file with a heading line and the following columns

Column Meaning
Branch Id
The branch id is used as the name of the circuit in EMO
Date
The date from which the information in the row is valid. If this column is empty the information is valid from teh earliest date possible
Limiting Conductor
the name of the cable type used in the conductor that sets the thermal limit of the line. This name needs to appear in the conductor code column in the Conductor Parameters file
Number of Conductors
the number of conductors used in the line.
SFT_Status (Y/N)
whether to apply SFT to theis line
Offload time (minutes)
the SFT offload time, or time window in which a thermal overload can occur.
Threshold
The threshold after which the constraint will be shown by EMO. This is expressed as a percentage of the constraint limit.
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