Development of A ThreePhase Distribution Power Flow Using Common Information Model

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CIM Extensions for Electrical Distribution and
CIM XML for the IEEE Radial Test Feeders
Dr. Xiaofeng Wang (GE Network Solutions) Dr. Noel
N. Schulz (Dept. of ECE, MSU) Scott Neumann (CES
International)
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Outline

• Introduction
• Previous Work and Problem Statement
• Proposed CIM Extensions
• The CIM XML Export Tool
• Validation Check of CIM Models and CIM XML
  Documents
• Conclusions and Future Work
• References
• Acknowledgments

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Introduction

• The Electric Power Utility Is an Extremely Large
  Enterprise
• Many systems and applications were designed to
  complete both business and engineering functions
• A single activity may need cooperation from many
  systems and applications
• Information within an individual system may be
  useful across the whole enterprise

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The Challenges of DMS Systems

• Utility information technology (IT) environment
  is truly heterogeneous, with a mix of
• Many hardware systems, many operating systems,
  and many application development environments
• Proprietary data models for each individual
  system

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• A Common Data Model is the Most Fundamental Step
  to Build an Integration Framework
• The Electrical Distribution Needs a Common Model
  to Facilitate the Integration within DMS Systems

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Previous Work

• EPRIs CCAPI
• Develop a Framework that Applications in the
  Utility Operations Environment Will be Plug and
  Play
• Common Information Model
• Control Center APIs and Inter-application
  Messaging
• IEC TC 57
• Working Group 13 is focused on EMS application
  programming interfaces
• Working Group 14 is focused on identifying and
  establishing requirements for standard interfaces
  related to DMS

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Problem Statement

• The CIM was originally designed for EMS systems
  and is not complete for DMS systems. The CIM
  needs to be extended to distribution systems to
  facilitate the integration within DMS
  applications
• Data requirements by the distribution power flow
  is a basis for the distribution network. A common
  model is needed to represent these data.
• A reference model is needed to verify the
  correctness of the distribution CIM (after
  created) and to demonstrate distribution
  information in CIM XML is exchangeable and
  understandable.

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The Road Map
IEEE Standard Test Feeders 123 nodes 13 nodes ...
Distribution CIM OO Model
CIM/RDF Schema
input
Specify
CIM/XML Export Tool
output
Validation Check
input
CIM/XML Documents for the IEEE Radial Test
Feeders
Red This Research Gray Others Work
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Tools and Software

• Microsoft Excel Data Sheet
• The Original IEEE Radial Test Feeders
• Microsoft Access Database
• The Input of the Export Tool
• The Validation Check Files
• Microsoft Visual C
• The Export Tool and The Import Tool
• IBMs XML for C Parser (XML4C)
• The Export Tool and The Import Tool

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Details of The Research Work

• Distribution CIM Modeling Issues
• Topology Model, Line Model, Load Model, Voltage
  Regulator Model, Feeder Model
• Distribution CIM Modeling Techniques
• CIM XML Export Tool
• Validation Check

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Major Distribution CIM Modeling Issues

• The Electrical distribution is an unbalanced
  network in nature. A single distribution device
  may have different attribute for each phase
• Distribution CIM needs to model multi-phase
  attributes

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Major Distribution CIM Modeling Issues (Continued)

• Distribution line are modeled with more geometric
  and conductor information.
• Impedance representation would be more complicated

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Major Distribution CIM Modeling Issues (Continued)

• Every distribution component is a part of a
  distribution Feeder

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Problems We Needed to Solve

• Multi-Phase Connection
• Multi-Phase Attributes
• Voltage Regulators
• Distribution Load
• Distribution Line Model
• Feeder Model

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Major Modifications and Creations
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The CIM XML Export Tool
The Export Tool
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The Validation Check Method
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Validation Check Results
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Reviews and Feedback From Industrial Contacts

• Scott Neumann from CES International, the
  Modeling Group Leader of WG14
• consistent cooperation from the beginning of this
  research
• EPRIs CCAPI Working Group
• A presentation at CCAPI Las Vegas Meeting, April
  2001
• Kevin Jones from Stoner and Herbert Falk from
  SISCO
• Reviewed the proposed CIM modeling and CIM XML
  documents

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Conclusions and Contributions

• Identified the CIM extensions and created an
  initial set of distribution CIM models for data
  requirements by the distribution power flow.
• The proposed model is capable to represent
  distribution network data and provide a basis for
  future modifications and extensions
• Proposed general data modeling methods for
  multi-phase attribute and whole-part relationship
  modeling
• Created CIM XML documents for the IEEE PES Radial
  Test Feeders
• Test Results and Industrial Feedback show that
  the proposed model is a good initial set of
  distribution CIM model

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Future Work

• Need More Feedback From Industry and WG14. Let
  More People Review the Proposed Model and CIM XML
  Documents
• Make Necessary Modifications and Submit it to
  WG14. Start It Through the Official Process of
  Being Part of a Standard Distribution CIM Model
• Models Need to Extend to Other Distribution
  Application Categories

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References

• 1 IEC 61970 Series Standards, CCAPI ftp site,
  ftp.kemaconsulting.com/epriapi/downloads
• 2 Draft IEC 61968 Series Standards, System
  Interfaces For Distribution Management,
  http//support.ces.com/wg14/index.html
• 3 W. H. Kersting, Radial Distribution Test
  Feeders, Distribution System Analysis
  Subcommittee Report, Proceedings of the IEEE
  Power Engineering Society 2001 Winter Meeting,
  Columbus, Ohio USA.
• 4 Radial Test Feeders IEEE Distribution
  System Analysis Subcommittee, http//ewh.ieee.org/
  soc/pes/dsacom/testfeeders.html
• 5 Xiaofeng Wang, and Noel N. Schulz,
  Development of A Three-Phase Power Flow Using
  Common Information Model, Proceeding of IEEE
  Power Engineering Society Summer Meeting, Seattle
  Washington, 2000.
• 6 Xiaofeng Wang, and Noel N. Schulz, The
  Extension of EPRIs CIM to Distribution Power
  Systems, Proceedings of 32nd Annual North
  American Power Symposium, Waterloo, Ontario
  Canada 2000.
• 7 Xiaofeng Wang, Scott Neumann, and Noel N.
  Schulz, CIM Modeling for Electrical Distribution
  and CIM XML for the IEEE Radial Test Feeders,
  EPRIs CCAPI meeting, Las Vegas, Nevada USA,
  2001. http//support.ces.com/wg14/index.html
• 8 Xiaofeng Wang, Scott Neumann, and Noel N.
  Schulz, CIM Extensions To Electrical
  Distribution and CIM XML For the IEEE Radial Test
  Feeders, IEEE Transactions on Power Systems,
  (under review)

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Acknowledgements

• Dr. Noel N. Schulz
• Scott Neumann, CES International
• Kevin Jones, Stoner, and Herbert Falk, SISCO
• Michigan Technological University
• NSF Career Award ECS97-33148