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Update on node-breaker model development WECC MVWG meeting Phoenix, AZ Brian Thomas (GE)

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Update on node-breaker model development WECC MVWG meeting Phoenix, AZ Brian Thomas (GE) Slaven Kincic (WECC) Donald Davies (WECC) November, 2013. Agenda. Background PSLF updates Mapping Challenges. Background. Import node-breaker West-Wide System Model (WSM) in PSLF

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slide1

Update on node-breaker model development

WECC MVWG meeting

Phoenix, AZ

Brian Thomas (GE)

Slaven Kincic (WECC)

Donald Davies (WECC)

November, 2013

agenda
Agenda
  • Background
  • PSLF updates
  • Mapping
  • Challenges
background
Background
  • Import node-breaker West-Wide System Model (WSM) in PSLF
  • Facilitate use of common dynamics data for planning and operations
  • Model validation using real time data
  • Reconciling the modeling differences and challenges working with WECC and WECC RC staff
pslf updates
PSLF Updates
  • WSM model can be directly imported in PSLF
  • EMS labels for devices
  • Bus-branch or node-breaker or hybrid model
  • New set of tools and features to help users

PSLF 19 Quick DEMO

mapping
Mapping
  • Summary of work
  • Mapping format and its benefits
  • Includes data not available in WSM like base load unit
  • Can be used by MVWG, WBRTF, TEPPC
  • Future work
  • Reduce the list of unmapped units
  • Reconcile modeling differences
mapping tool for wecc
Mapping Tool for WECC
  • Validation of mapping for any manual additions
  • Automates incremental mapping updates
  • Automates mapping updates when underlying WSM model and/or Planning base case is changed
  • Exports mapping file which can be directly read into PSLF
  • Eliminates man-days of effort manually updating the mapping
differences in number of generators
Differences in number of generators

WSM Model

Planning Model

  • Question
  • Which dynamics model to use for HAUSER_M units in the WSM case?
  • Does the WSM model need to be updated to reconcile this issue?
slide9

Multiple generators with same attributes, it is difficult to differentiate one generator from other

  • Question
  • Should we even worry about these?
  • In this case above, all the units have genptj and exst1 model but with different characteristics
slide12

Summary of issues with mapping generators

  • Nodes with kV < 2.2 not modeled in WSM. Because of this, generators in planning case which are on buses < 2.2 kV could not be mapped. Also, for some buses with kV >2.2kV in the planning case there is no corresponding bus in the WSM case.
  • For 1 bus in the WSM model, there may be more buses in the planning case.
  • For some generators with same attributes, it is difficult to differentiate one generator from other.
  • Generator terminal kV doesn’t match
  • Generator MVA ratings doesn’t match
slide13

Station Service Loads

Planning Model

WSM Model

  • Use of net generation will lead to model validation issues
  • Should we add rules based upon the experience with power plant testing for large units?
slide14

HVDC Modeling

  • Transformer reactance per bridge in WSM is almost 1/4th to 1/5th times the value seen in planning case.
  • Commutating reactance calculated from WSM data is 1/10th of the values as seen in planning cases.
  • Modeling individual bridge in WSM model vs. Entire Pole in planning modeling
    • E.g. CELILO bridges 1,3,5,7 are modeled as individual bridges in WSM case. This is modeled as 1 pole with 4 bridges in planning base cases.
    • Two alternative options
      • Create equivalent pole model from WSM data to match planning model
      • Reframe HVDC problem in power flow solution and update PDCI user written model
  • Need guidance from HVDC task force.
slide15

SVD modeling

Planning Model

WSM Model

  • Should we group shunts and create SVD’s from WSM data to use existing solution techniques
  • OR
  • Should we add new solution techniques and new models to solve this problem by adding priority based or sensitivity based solution techniques
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