Transcript IPSA+ Network Drawing

Ipsa Power
2013 User Group
Meeting
www.ipsa-power.com
PROFILES
Profiles
• Added for the FALCON project
• Allows multiple load flow studies to be run with
different loads
– E.g. time of day analysis
• Each network can contain multiple profiles
• Each static load and PQ generator can have a
profile assigned
• Scripting functions also included
Profiles
• Every load and generator can have a profile
assigned to it:
Profile Types
• Actual load
– Sets the MW and MVAr value of the load
– The normal load value is ignored
• Scaled load
– Scales the normal MW and MVAr value of the load
• Actual generator
– Sets the MW and MVAr value of the generator
– The normal generator output is ignored for PQ generators
• Scaled generator
– Scales the normal MW and MVAr value of PQ generators
Profile Types
• Add a new profile from Network > Profiles… menu
• Enter a unique name
Adding Profiles
• An empty profile is then created
• Each profile comprises a set of categories and
associated MW and MVAr data
• Category names must be unique
• Any number of categories can be added
• Any text can be used as the category name
• Recommended that the same category names are
used for all profiles
Adding Profiles
• Each profile is defined by a set of categories:
Time based
Seasonal
Arbitrary
Example Profiles
Different profile names but with same category names
Profiles
• Categories can be typed into the table
• Table data can be copied from a spreadsheet
– Automatically adds categories to the table as required
• Graph displays the profile shapes for real and
reactive power
Completed Profile
Using Profiles
• Simply select the
required profile from
the load or generator
properties dialog:
Actual and Scaled Profiles
• Actual profiles:
– Normal load or generator output
values are ignored during profile
analysis
Actual and Scaled Profiles
• Scaling profiles multiply the
load or generator power
• Use the same MW and MVAr
profiles to keep the load
power factor constant
Output = Power x
Scaling Factor
Analysis
• Profile analysis:
– Load flow is calculated for all
categories
– Important to make sure all
category names are the same
across the profiles
– Ipsa calculates the minimum,
maximum and average power
flows and busbar voltages
Profile Analysis
• Display options are
based on the
normal load flow
display styles
Load Duration Curves
• Plots the number of categories against power flow
Power flow is greater
than 80MW for ~60
hours per month
Load Duration Curves
• Plots up to 6
different branch
flows
• Plot as line or bar
chart
• Horizontal axis can
be hours or
percentage
• Export options to
csv files and images
Load Flow Analysis
• Can also perform single load flows via normal load
flow dialog:
Contingency Analysis
• Each contingency study can also run all the profile
categories
• For example:
– Run base case load flow
– Switch out N-1 branch
– Run all profile categories, or just one selected category
– Repeat for all N-1 branches
Contingency Analysis
RELIABILITY
Reliability Analysis
• Reliability analysis engine has been added to Ipsa
• Based on DisOPT analysis code
– Developed by Strathclyde University PhD student
– DisOPT performs optimisation of distribution networks to
maximise continuity of supplies to customers
– Calculates customer interruptions (CIs) and customer minutes lost
(CMLs)
– Optimisation code can determine location of normally open
points to reduce CIs and CMLs
Reliability Analysis
• DisOPT requires reliability analysis in order to
perform the optimisation
• The reliability part of DisOPT has been enabled
– Optimisation part will come later
• Reliability side is still being validated
• Will be completed for the full Ipsa 2.4.0 release
Reliability Analysis
• Input data:
• Customer numbers for loads
• Branches and transformers need:
–
–
–
–
Failure rate
Repair rate
Switching time
Repair time
• Circuit breakers can have:
– Switching time
– Repair time
Reliability Analysis
• Determines loss of supply based on protection
zones
• Need to add circuit breakers, isolators, fuses etc
to network
Reliability Analysis
Zone affected
by fault
Zone restored
after fault
clearance
Reliability Analysis
• Reliability analysis is currently under testing
• Results are being validated
• Search rules for protection zones are being
checked
• Will be complete for the full 2.4.0 release
• Will also include scripted functions