Keeping an Operational Eye on Wind and Solar

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HECO describes the challenges in integrating wind and solar energy into the electric grid in the real world. Slides from the REIS seminar series at the University of Hawaii at Manoa on 2010-09-02.

HECO describes the challenges in integrating wind and solar energy into the electric grid in the real world. Slides from the REIS seminar series at the University of Hawaii at Manoa on 2010-09-02.

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  • 1. Keeping an Operational Eye on Wind and Solar Presentation for REIS Seminar at the University of Hawaii September 2, 2010
  • 2. Topic • What is being done to manage renewable distributed generation? 2
  • 3. Overview • “Behind-the-meter” PV statistics for the islands 4
  • 4. Hawaiian Islands PV Penetration Overview HELCO MECO HECO As of August 2010 Big Maui Molokai Lanai Oahu Island Installed/Pre- Approved PV 17,259 9,032 535 2,053 21,578 (kW) 2009 Peak Load 195 200 5.9 4.7 1200 (MW) Island PV Penetration 8.9% 4.5% 9.1% 44% 1.8% (%)
  • 5. HECO High Penetration Distribution Circuits Source: HECO As of August 2010 6
  • 6. MECO DG Status Source: MECO As of August 2010 7
  • 7. HELCO High Penetration Distribution Circuits Source: HELCO As of August 2010
  • 8. Locational Value Maps (LVM) of High Penetration Circuits Standardized, web- accessible LVM created for HECO/MECO/HELCO to visually track circuit Oahu penetrations. Informs developers of high penetration locations which may require study. Internally, automatic links from GIS, CIS, T&D infrastructure details are being tested. Future links to other database layers including outage mgt, asset mgt. DSM & UFLS circuits •Areas with highest PV penetration on Oahu: – Millilani and Honolulu: Due to 9 customer PV
  • 9. • Areas with highest PV penetration in Maui County: – Wailuku/Kahului, Maui: Maui Due to large PV projects – Kaunakakai, Molokai: Due to combination of small circuit loads and interconnected commercial PV systems – Manele, Lanai: Due to Lanai Sustainability Research (LSR) 1.2 MW facility Molokai Lanai
  • 10. • Areas with highest PV penetration on Big Island: – Kona Coast: Due to large commercial PV systems – Hilo: Due to combination of small circuit loads and interconnected commercial PV systems – Waimea/Honokaa/ Volcano: Due to small circuit loads and DG PV systems Big Island of Hawaii
  • 11. Common Pathways Forward Hawaiian Electric Companies What will we need to successfully operate in 2030? Field Monitoring Field Monitoring Integrated Sys. Integrated Sys. Increase DR Increase DR 2010 & Validation & Validation Modeling Modeling Visibility on Sys. Visibility on Sys. Today Renewable Renewable Increase system Increase system Use appropriate Use appropriate resource resource operators real time operators real time renewable resource renewable resource characterization visibility of resources visibility of resources characterization gen/trans/DG models gen/trans/DG models and monitoring and distribution system and distribution system and monitoring (e.g. sensors, PMU) (e.g. sensors, PMU) Distributed resource Distributed resource Capture DG impacts Capture DG impacts penetration penetration in system planning Add “aggregated” DG Add “aggregated” DG in system planning monitoring and monitoring and and operations resource visibility to resource visibility to and operations management system operations system operations management (location, trends, etc) (location, trends, etc) Implement variability Implement variability Develop and Develop and management tools management tools implement Wind and implement Wind and (e.g. enhanced thermal (e.g. enhanced thermal Solar ramp Solar ramp unit capability, load unit capability, load forecasting tool forecasting tool management, storage, management, storage, smart grid, etc.)) smart grid, etc. 2030 Increase com system Increase com system bandwidth and bandwidth and Future visualization capability visualization capability Funded/Initiated 12 Have Not Initiated
  • 12. Focus of Efforts • Resource and Circuit Load Monitoring • Distribution Circuit Modeling and Analysis • Planning & Operational Visualization Tools • Ramping Mitigation Strategies – Smart Load Shedding Schemes – DG Inverter communications/control • Policy Decisions to manage renewable DG growth 13
  • 13. Focus of Efforts • Resource and Circuit Load Monitoring • Distribution Circuit Modeling and Analysis • Planning & Operational Visualization Tools 14
  • 14. HiP-PV Field Monitoring • Substation deployment of low cost TJD-1 pyranometer system for high resolution, time synchronized solar resource monitoring (1sec) and data for modeling at 12 kV substations • Deployed at high-penetration circuits to assess PV impacts • Promotes active participation by substation and field personnel 15
  • 15. HiP-PV Field Monitoring 16
  • 16. Local Solar Potential Monitors (LM-1) • Mounted on com. tower leg; directly wired into RTU • Less than 8-bit data transfer at 1 sec refresh • All panels with same tilt axis facing SE 17
  • 17. Operation Planning Predictive Visualization & Data Monitoring Ability to anticipate production on the system by linking solar resource information with installed capacity around the island
  • 18. Focus of Efforts • Resource and Circuit Load Monitoring • Distribution Circuit Modeling and Analysis • Planning & Operational Visualization Tools 19
  • 19. Distribution Circuit Modeling and Analysis • Model distribution system (12kV, 46kV) • Study the effects of high penetration PV on the circuit and system level • Develop scenario/result database • Validate model with measured data • Suggested solutions 20
  • 20. Focus of Efforts • Resource and Circuit Load Monitoring • Distribution Circuit Modeling and Analysis • Planning & Operational Visualization Tools 21
  • 21. Automated Visualization Tools 1% < PV ≤ 5% 5% < PV% ≤ 10% 10% < PV% < 15% PV ≥ 15% 22
  • 22. Automated Visualization Tools 1% < PV ≤ 5% 5% < PV% ≤ 10% 10% < PV% < 15% PV ≥ 15% 23
  • 23. Automated Visualization Tools 1% < PV ≤ 5% 5% < PV% ≤ 10% 10% < PV% < 15% PV ≥ 15% 24
  • 24. Automated Visualization Tools 1% < PV ≤ 5% 5% < PV% ≤ 10% 10% < PV% < 15% PV ≥ 15% 25
  • 25. Visualization Tools • Planning • Operations 26
  • 26. Planning Visualization Tool – Distribution Modeling/Analysis – Scenario-based Conditions – Validation with Measured Data – Suggested Solutions 27
  • 27. Operational Visualization Tool – DG Penetration Levels – Resource Map – Circuit Load Map – Communications Map – Provide Alert Flags • Planning Visualization Tool • Operator Experience 28
  • 28. Sites Visited H.U.I. WindNET • Deployment of remote sensing devices (sodar) on Big Island for wind ramp rate forecasting pilot • Leverage collaborations with CA, OR, HI utilities to operationalize an early warning capability for operators • One of the first deployments in the nation for purposes of ramp forecasting for utility applications 29
  • 29. Questions/Comments?? Mahalo Family of HEI Utilities HECO MECO HELCO 30
  • 30. What is the Right Mix? Evening Solar PV driving peak down day peak remains load Solar Potential Period Time of Day
  • 31. Actual Solar Sub-hourly Trends Industrial Solar PV Project Output (kW) 32 Time of Day Source: HELCO
  • 32. PV Cluster and Aggregated Models • Characterize discrete and aggregated circuit load profiles at 12 kV substation (residential, industrial, 12kV Substation commercial) L • Use reference LM-1 sensors to L L estimate solar resource output at location • Be able to project solar resource L potential and circuit loading to L account for behind-the-meter generation L Engage field personnel L Monitoring LM-1: shows 30% Gain experience Installed PV: 300 kW Customer sites L Total Load: 1.5 MW Validation Employee Volunteers Effective Gen: 100kW Parameterization of Integration ramp rates over various time intervals and locations
  • 33. Hi-Penetration PV Initiative (HiP PV) • SMUD/HECO HiP-PV – (2010-2012) – Deploy monitoring devices, assess/validate impact of high penetration circuits and integrate results into T&D models – Investigate solar forecasting & graphics-based visualization tools (pyranometers, sky imager, field data to EMS interface) – Scenario-based modeling impact of high penetration PV on select distribution circuits (HECO/HELCO/MECO) • Industry Partnerships – SMUD, SunPower, BEW Engineering, AREVA, Siemens, Schweitzer, SunPower for Schools, WECC Utilities, HNEI, AWS Truewind, EPRI 34