Technologies to Enable Wind Power Integration. John Kehler Technical Lead System Performance

Transcription

1 Technologies to Enable Wind Power Integration John Kehler Technical Lead System Performance

2 Presentation Outline The AESO Overview of Wind Development in Alberta Technologies Wind Power Forecasting System Operator Tools Flexible Resources Supply resources Demand resources Supply-demand resources (storage) Access to Flexible Resources Interties Wind Power Management 2

3 Who is the AESO Established in 2003 through the Electric Utility Act Independent System Operator Not for profit organization Independent of market participants Governed by independent board appointed by the Minister of Energy Regulated by the Alberta Utilities Commission Operation funded through Trading Charge and Transmission Tariff 3

4 AESO Mandate Market Development Design a fair, efficient and openly competitive market for electricity. Transmission System Development Plan and develop a reliable transmission system that facilitates the competitive market and investment in new supply. Transmission System Access Provide system access for generation and load customers. System and Market Operations Direct the reliable operation of the electricity system and market. 4

5 Alberta s Electric Industry 10,236 MW peak and 80% LF 12,781 MW total generation 5,946 MW 5,071 MW (Wind) 629 MW (Other renewables) 264 MW 871 MW BC Over 280 generating units Wholesale market with about 200 market participants > 21,000 km of transmission Interties BC (up to 780 MW) & Sask. (up to 150 MW) Alberta Sask 5

6 Wind Power Development 629 MW of transmission connected wind generation today Additional facilities will be commissioned by the end of 2010 Staged transmission plans in place to accommodate up to 4000 MW in the next few years 8000 MW of wind generation interest in the queue today 6

7 Wind Integration and Power Systems The discussion will focus primarily on supply demand balancing Wind power will introduce Variability and Uncertainty into system operations and planning Variability of supply resources requires Flexibility of other resources to keep the system in supply-demand balance Flexible resources can be supply resources or load resources Uncertainty can be reduced through accurate Forecasting Technology will help you either; Manage Variability Manage Uncertainty Reduce Uncertainty / Variability 7

8 Wind Integration and Power Systems Manage Variability Flexible resources and access to Flexible resources Power management of the variable resources Manage Uncertainty Typically automatic controls such AGC and Regulating Reserves (Additional ramping services are being looked at in Alberta) Reduce Uncertainty Forecasting Power management of the variable resources 8

9 Technology to Enable Wind Integration

10 Wind Power Forecasting 2005 AESO studies indicate increased uncertainty and variability from wind generation require mitigation. Wind power forecasting is one of the mitigating tools. Pilot project ran from 2007 to 2008 Work group recommendations to AESO Q Stakeholder consultation Q Contract signed with WEPROG Jan 2010 to provide; Long term forecast Short term (ramp tuned) forecast Wind power forecast based on global weather data (long term) posted on the AESO website June 2010 Short term forecasting requirements and systems are under development 10

11 Wind Power Forecasting Forecast Example Uncertainty in the forecast magnitude Uncertainty in the forecast time 11

12 Wind Power Forecasting Monthly Performance 12

13 System Operator Tools We anticipate that the wind power forecasts will have a; much larger degree of error (magnitude and time) as compared to load forecasts high degree of variability high degree of uncertainty Therefore, we considered more innovative and meaningful ways to provide forecasting information to the system operator. 13

14 System Operator Tools Integrating forecasts into market operation will have varied use from a dispatch decision to keep the system in balance over the next 20 minutes to resource decisions in the next few hour to days. Intra-Hour Intra-day Day-Ahead + Energy Market dispatches - Market Information - Additional Operating Reserve dispatches -ATC posting updates -Short term adequacy -assessment Market Information Operating reserve forecasts and procurement Supply adequacy assessment 14

15 System Operator Tools Dispatch Decision Support Tool System Supply and Control Energy Market Merit Order Generator ramping characteristics Regulating reserve merit order Load Supply Following (new) Wind Power Management (WPM) new System Status What has been dispatched Actual generator output Tool Assess the situation & risk of: Load forecast System Change Actual and forecast Interchange Schedules 3 Modes for Wind power forecast Input External Wind Power Forecast and Uncertainty Persistence Forecast - System Ramping Capability Persistence Ramp Forecast - Supply Shortfall issue - Supply Surplus (Zero-offer) issue System Considerations - Minimum technical output issue OTC violation issue ATC Limits Uncertainty Analysis (new) Energy Market Dispatch Trigger Supply surplus procedure Trigger Supply shortfall procedure Trigger Additional AS procedure Trigger WPM procedure 15

16 Flexible Resources to Enable Wind Integration Conventional Generation Increase their ramp rate capability Increase their operating range by decreasing minimum stable operating condition Increased flexibility can be offered to the energy or ancillary service markets Load Resources Reduce or increase demand to system operating needs Reduction of demand can be offered in the ancillary service markets (supplemental reserves) Exploring opportunities for demand response in the energy markets F7C3FC3F69D929FD7BC2EAE07FF3BC2AB63CD5CF524E 1D3B4FECAFC04AA11091E30A760B0D

17 Flexible Resources to Enable Wind Integration Storage Facilities These are very flexible facilities Store energy when acting like a load Produce energy when acting like a generator 17

18 Examples of Storage Facilities

19 Interties and Flexibility Current practice is hourly intervals for schedules Future is to reduce the scheduling intervals This provides faster access to flexible resources in our jurisdictions 19

20 What is Wind Power Management In Alberta this refers to the ability at a Wind Power Facility to: Ramp rate limit the MW output Power Limit the MW output Reduce the MW output to over frequency conditions 20

21 Thank You