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CIM for Planning and CIM for Dynamic Models - Project Report

CIM for Planning and CIM for Dynamic Models - Project Report. Terry Saxton Xtensible Solutions tsaxton@xtensible.net. CIM User Group Vasteras, Sweden June 13, 2008. EPRI CIM Planning Project. EPRI initiated project in October 2006 Funded by ten utilities and multiple vendors Objectives

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CIM for Planning and CIM for Dynamic Models - Project Report

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  1. CIM for Planning andCIM for Dynamic Models- Project Report Terry Saxton Xtensible Solutions tsaxton@xtensible.net CIM User GroupVasteras, Sweden June 13, 2008

  2. EPRI CIM Planning Project • EPRI initiated project in October 2006 • Funded by ten utilities and multiple vendors • Objectives • Develop a common power system network model that both operations and planning groups can use as a basis for information exchange • Provide the possibility of entering network model data once for both planning and operations applications

  3. Needs Addressed • Improve reliability of transmission grid • Strengthen planning efforts based on actual network contingencies and base conditions • Enable planning studies to be based on actual physical network with all current field changes incorporated • How? • Enable the management and maintenance of a single, common network model for use by both planning and operations • Enable the sharing of steady state, short circuit, and dynamic models • Technical Approach • Extend the IEC 61968/70 Common Information Model (CIM) Standard • Started with defining high priority use cases

  4. Use Cases: P-P • Export a static network model from one planning software program to another to transfer a planning base case for additional study by another party • Steady State model (completed) • Short Circuit model (partially completed) • Dynamic data models (preliminary investigation begun) • Cases may be transferred either within one organization, or between two separate organizations (i.e. RTO – utility) Planning Planning

  5. Use Cases: O-P Planning Planning Operations

  6. Use Cases – Operations to Planning • Import a state estimator or load flow case from the Energy Management System into the planning environment • To establish a planning base case for additional study or for developing a current planning model • Export Contingency Specifications from the EMS or another application for use by the planning application(s) • This would allow coordination between the contingencies used by operations and transmission planning as well as generation planning • Convert the contingency low side load rollover used in the EMS application(s) to the contingency load rollover used in the planning application(s) • Allows coordination between the contingencies used by operations and transmission planning as well as generation planning • Export Load Forecast data from the EMS or another application for use by the planning application(s) • This will provide correct conversion between the models used by operations and transmission planning as well as generation planning

  7. Use Cases: P-O • Export detailed dynamic model data to EMS (e.g., voltage stability analysis) for real-time dynamic assessment analysis Planning Planning Operations

  8. Profiles and Interfaces Planning Planning NMMR Historian • NMMR • Project Repository • As-build Network Model • Historical Data Operations

  9. Accomplishments and Benefits • Brought key suppliers of planning applications and EMS together with utilities to achieve stated objectives • Two workshops conducted • Task Forces prepared use cases for the information exchange between planning and operations and a central network model manager • Achieved agreements on CIM representation of steady state and short circuit models for exchange • Most reuse of existing CIM classes with some new extensions • Conducted multiple conference calls to resolve issues identified by project members • Collaborated closely with current RTO/ISO/utility projects with similar goals

  10. Accomplishments and Benefits • Extended CIM to support the new integration frameworks that incorporate a centralized network model repository and manager • Makes possible single entry of network model changes for use in both planning and operations environments • Enables sharing of models between planning and operations • Enables standard interfaces based on CIM/XML/RDF • Directly supports current ERCOT efforts and stated goals of other RTO/ISOs and member utilities • Defined new profiles for CIM Planning information exchange • Interoperability tests are planned • Proposed CIM extensions and issue resolutions submitted to IEC

  11. CIM Extensions – New Classes • Contains 10 new Classes in the newPlanning Package: • BranchGroup • BranchGroupTerminal • CorrectionValue • Loss Factor • Mutual Coupling • Ownership • Planning Area • PlanningZone • PlanningZoneGroup • WindingImpedanceCorrection

  12. CIM Extensions – New Classes (Cont’d) • Contains 1 new Class in the Topology Package: • ConnectivityNodeGroup • Contains 1 new Planning Class in the Wires Package: • SwitchedShunt • Contains 1 New Planning Class in the Meas Package: • EquipmentRating

  13. New Attributes • Each new class from the Planning Package contains one or more attributes • Added new attributes to Existing Classes: • ShuntCompensator • EnergyConsumer • PowerSystemResource • GeneratingUnit • TransformerWinding • SynchronousMachine

  14. CIM for Dynamic Models • New EPRI project – started March 2008 • Project Objectives • Develop a common model and set of interface profiles based on the CIM that supports the exchange of dynamic models and data between • different planning applications and equipment suppliers • planning applications and operations

  15. Business Needs • Conduct dynamic assessment studies • Contingency analysis • Evaluation of conditions leading up to a catastrophic event • Determine where network upgrades are needed • Studies involve simulations which require dynamic models of generators, loads, other network devices • Models far more detailed than those used for load flow studies • Dynamic models becoming more complex with multiple variations

  16. Business Needs (cont’d) • New plant commissioning • Operating utility must round up various dynamic models in various formats (e.g., PSLF or PSSE) • New equipment requires new models from supplier • May entail research from equipment manuals • Followed by manual tweaking for custom changes • Multiple sources of data from different systems needed for dynamic models • Ex: Transformer test reports stored in Asset Management system

  17. Types of Dynamic Model Exchanges • Standard models • Several approved lists (IEEE, WECC, RFC) • Include multiple models for following categories: • Generators (including wind turbines) • Motors • Excitation systems, limiters, and compensators • Turbine/govenor models • Stabilizers • Loads • Transmission devices • Relay and protection devices • HVDC • User-Defined models • Decomposed blocks for user-written models with parameters

  18. Project Teams Created • Three project teams were created to accomplish the majority of the work on the project • Standard Model Team: Lead - Bill Price • User-Defined Model Team: Lead - Chuck Dubose • CIM Modeling Team: Lead – Kendall Demaree • Other project members not in attendance are invited to join a team

  19. Project Work Accomplished • First cut made at requirements for dynamic model exchange • Will lead to compilation of data elements for exchange profile • Draw heavily on existing PSSE and PSLF file formats currently in use • New project participant DigSilent has additional file format to consider • New inputs from UCTE and Eurostag • Next step is mapping to CIM

  20. Requirements for Standard Models • Name of model • Associated bus number and unit ID in static network model (bus name and kV optional) • MVA base (or MW capability) value • System parameter values. For example for generators: • D-axis transient rotor time constant • Q-axis transient rotor time constant • Inertia constant, sec • Damping factor, pu • D-axis synchronous reactance • Q-axis synchronous reactance • D-axis transient reactance • Q-axis transient reactance • Stator leakage reactance, pu • Saturation factor at 1 pu flux • Saturation factor at 1.2 pu flux • Stator resistance, pu • Compounding resistance for voltage control, pu • Compounding reactance for voltage control, pu

  21. CNG DynamicModels SynchronousMachine f PSS V, θ Generator Ireal, Iimag GeneratingUnit Exciter Associating Dynamic Models to Static Load Flow Model • UML modeling requirements captured

  22. PowerSystemResource Control Block 1 1 * * Block Input Block Output 1 0..1 * Signal 0..1 * 0..1 Measurement Connectivity Modeling Between Control Blocks • Proposal for CIM modeling approach

  23. Key Artifacts to be Produced • Proposed extensions to CIM UML information model • Proposed modeling approach to handle dynamic models • New exchange profiles for the various exchanges between planning applications, operations advanced applications, asset management, and equipment manufacturers • Standard definition for base cases from operations • Template for equipment suppliers to provide dynamic models

  24. Questions?

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