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Mid-Columbia Coordinated Hydro Operations Model John C. Howard CddHoward Consulting Ltd. CEATI 2009.

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Presentation on theme: "Mid-Columbia Coordinated Hydro Operations Model John C. Howard CddHoward Consulting Ltd. CEATI 2009."— Presentation transcript:

1 Mid-Columbia Coordinated Hydro Operations Model John C. Howard CddHoward Consulting Ltd. (jchoward@cddhoward.com) CEATI 2009

2 CddHoward Consulting Ltd. Slide 2 Plan for this talk System of seven dams Objective and constraints for optimization Results for three study scenarios Excel optimization environment issues

3 CddHoward Consulting Ltd. Slide 3 Purpose and Scope of this Study Purpose Identify opportunities for revised coordination of river system operations Scope Cascade of seven hydro projects Study Historical Scenarios with a range of Hydrologic and System-Load Conditions Uses an iterative QLP optimization

4 CddHoward Consulting Ltd. Slide 4 Columbia River Basin Mid-Columbia Canada USA

5 CddHoward Consulting Ltd. Slide 5 Mid-Columbia System Grand Coulee Chief Joseph Wells Rocky Reach Rock Island Wanapum Priest Rapids TOTAL FT MW KW/CFS 334 7,049 24.8 176 2,069 13.1 74 890 5.4 94 1,320 7.1 43 622 3.3 83 831 6.0 60 788 4.5 865 13,570 64.2

6 CddHoward Consulting Ltd. Slide 6 Grand Coulee 334 ft 7,049 MW 24.8 kW/CFS

7 CddHoward Consulting Ltd. Slide 7 Chief Joe 176 ft 2,069 MW 13.1 kW/CFS

8 CddHoward Consulting Ltd. Slide 8 Wells 74 ft 890 MW 5.4 kW/CFS

9 CddHoward Consulting Ltd. Slide 9 Rocky Reach 94 ft 1,320 MW 7.1 kW/CFS

10 CddHoward Consulting Ltd. Slide 10 Rock Island 43 ft 622 MW 3.3 kW/CFS

11 CddHoward Consulting Ltd. Slide 11 Wanapum 83 ft 831 MW 6.0 kW/CFS

12 CddHoward Consulting Ltd. Slide 12 Priest Rapids 60 ft 788 MW 4.5 kW/CFS

13 CddHoward Consulting Ltd. Slide 13 Hourly Optimization Maximize Energy-In-Storage at Last-Hour Meet Historical Hourly Load (± 5MW) Realistic Plant Operations, Wave Routing, Local Sideflows, Encroachments and Seasonal Discharge Constraints (Fish)

14 CddHoward Consulting Ltd. Slide 14 Plant Envelope Model

15 CddHoward Consulting Ltd. Slide 15 WEL: 74ft @ 890MW 35 Miles Transient Wave Routing

16 CddHoward Consulting Ltd. Slide 16 Ungauged or Poorly Estimated Varies by 1% to 10% of Inflow(t) Preprocessed to balance mass Irrigation Returnflows & Sideflows Douglas County, WA Grant County, WA

17 CddHoward Consulting Ltd. Slide 17 Encroachment Grant County WA Rock Island Wanapum Significant Issue for most of the projects Encroachment Model Function of DS elevation and US discharge Example: Wanapum pool encroaches on Rock Island tailwater

18 CddHoward Consulting Ltd. Slide 18 Environmental Constraints 7ft Higher Pools on LaborDay Weekend 5ft Higher Pools on LaborDay Weekend Increased Min Flows in March and Oct-Nov Increases in Maximum River Stage in the Mid-Mornings of March and Oct-Nov

19 CddHoward Consulting Ltd. Slide 19 Coordinated Generation Meet time varying load Move water to ‘right’ pool at ‘right’ time Operate plants consistent with Unit Commitment & Dispatch Meet constraints

20 CddHoward Consulting Ltd. Slide 20 Excel as a Modelling System Data Analysis and Verification Formula Coding Database Coding Spreadsheet Debugging Deployment Easy Tricky Easy Difficult Tricky Basic Optimization

21 CddHoward Consulting Ltd. Slide 21 Model Validation Switch Model into ‘Simulation Mode’ Historical Discharges drive Model Results create ‘Basis for Comparison’ Historical vs Validation vs Optimized Compare Model Generation and Pool Levels to Measured data.

22 CddHoward Consulting Ltd. Slide 22 Plant Model Schematic and Modes 7 Dam Cascade Historical System Load Optimize Mode ± 5 MW Optimized Discharge Δ MW Validation Historical Discharge Validation Mode Historical Plant MW Δ

23 CddHoward Consulting Ltd. Slide 23 Tables for Project Configurations Date & Time Driven Tables for Operational Constraints Hourly-Data Worksheet for the Current Scenario Data and Configuration Project ConfigurationsHourly DataHourly Constraints

24 CddHoward Consulting Ltd. Slide 24 Scenario and Optimization Control pic – toolbar pic – torn worksheet tabs, stacked

25 CddHoward Consulting Ltd. Slide 25 Evaluating Results Actual Operations Contain Inconsistent Data Validation is Replicable Validation is the Gold Standard Compare Model to Validation

26 CddHoward Consulting Ltd. Slide 26 Optimized Hourly Stored Energy

27 CddHoward Consulting Ltd. Slide 27 Summary 3.5% More System Energy in Sample Scenario Operations Dependant on Load Forecast Excel can be a good Open Platform

28 CddHoward Consulting Ltd. Slide 28 Thank You!

29 CddHoward Consulting Ltd. Slide 29 Optimized Hourly Pool Level Changes Scenario 1

30 CddHoward Consulting Ltd. Slide 30 Optimized Generation Improvements Scenario 1


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