National Grid Plc · LSE:NG.
National Grid — Technical Presentation (March 2004)
18 slides from National Grid's technical presentation, Mar 10, 2004
Slide 1: An interesting day... Wednesday 10th March 2004
An interesting day……… Wednesday 10th March 2004 Nick Easton Operational Energy Manager - A Team Operations & Trading UK Transmission
Slide 2: Outline of Presentation
Outline of Presentation To provide an overview of the circumstances leading to the issue of a Notification of Inadequate System Margin (NISM) on March 10th 2004 Including:- · A summary of the techniques we adopt to analyse the plant margin within System Control · An overview of the plant position fo
Slide 3: Setting the Scene - Wednesday 10th March 2004
Setting the Scene - Wednesday 10th March 2004 · Darkness Peak expected at 1840 hours · Weather cool but not freezing · Expected temperatures 4 - 5 oC · Some wintry showers across the country and snow in the North East
Slide 4: Control Room Structure
Control Room Structure Power System Manager Operational Energy Manager Operational Strategy Manager Operational Transmission Manager & Balancing Team & Strategy Team & Transmission Team
Slide 5: How do we analyse plant margins within Strategy Team timescales?
How do we analyse plant margins within Strategy Team timescales? · Operational Strategy Team - From Day Ahead down to 4 hours ahead of Real Time · Estimate the demand, taking account of :- · day of the week, month · weather:- temperature, illumination, wind speed, direction and cooling power, precip
Slide 6: How do we analyse plant margins?
How do we analyse plant margins ? · Already have a System Requirement & must compare the submitted BMU availability with that System requirement. How? · We derive a time varying profile representing the effective Darkness Peak availability of all BMUs expected to be operating. 2A 2B · Study each pea
Slide 7: Cardinal Point Operating Programs - a slice in time
Cardinal Point Operating Programs - a slice in time · Detailed analysis of each cardinal point & incorporating all the latest submitted data Margin Action Required · For the selected Cardinal Point the following are identified- Avail Dem + Res · Demand Estimate · Reserve requirements Demand · Availa
Slide 8: Reserve Requirements Over Time
Reserve Requirements Over Time Contingency Y-Axis Reserve Standing R eserve Positive Operating Reserve Reserve for Response Low Frequency (LF ) +ve Regulating R eserve Negative Operating -ve R egula ting Re serve T -24 T-18 T -12 T-6 T Reserve Reserve for Response High F requ ency (HF ) T - 4h rs
Slide 9: Darkness Peak - How it looked from the Day Ahead
Wednesday March 10th 2004 Darkness Peak - How it looked from the Day Ahead Weather - “The 10th is expected to begin with rain and wintry showers across parts of E England and largely clear skies elsewhere. Falls generally slight; however, showers of sleet and snow later” · Weather cool but not freez
Slide 10: How did it look at the Day Ahead? - Temperatures
How did it look at the Day Ahead? - Temperatures 1 4 .0 1 2 .0 2nd Week March 2003 1 0 .0 1700Hrs Average oc 8 .0 2002 6 .0 4 .0 2004 2 .0 0 .0 D ay 1 Day 2 D ay 3 D ay 4 D ay 5 Second Week in March (1700Hrs T0)
Slide 11: How it looked at the Day Ahead - Demand
How it looked at the Day Ahead - Demand Maximum Metered Demands · Demand Estimate 50000MW · High, reflecting cold weather but 08/12/03 1730Hrs = 52965 MW not exceptional 10/12/02 1730Hrs = 54430 MW 51000 10th Mar 2004 Estimate ACS Demand 50000 2004 49000 Normal Dem’d Demand 2003 MW 48000 2002 47000
Slide 12: Darkness Peak - How it looked from the Day Ahead
Wednesday March 10th 2004 Darkness Peak - How it looked from the Day Ahead. · Darkness Peak expected at 1840 hours. · Darkness Peak demand estimate 50000MW · Day Ahead Operating Program identified 3 additional BMUs required to run to satisfy Scheduled Reserve · Contingency - very slight shortfall at
Slide 13: Progression Through Operating Programs
Progression Through Operating Programs 3000 Cumulative Losses From Day Ahead 2500 NISM Issued 2000 MW -500 1500 1000 Returns 500 0 Day Ahead Preliminary Revised Revised 2 Revised 3 Final Operating Programs
Slide 14: Purpose of NISMs
Purpose of NISMs · To make Participants aware that there is insufficient system margin. · To prompt all Participants to review BMU data and encourage more plant to be traded within the market or made available in the BM. · To prompt Suppliers to consider further Customer Demand Management actions an
Slide 15: Market Response to NISM
Market Response to NISM 2500 450 4HB Vol 400 2HB Vol 2000 350 HH Vol HH Low Prices 300 Volumes (Lots) Price (£/MWh) 1500 HH High Prices 250 200 1000 150 500 100 50 0 0 1 3 5 7 9 11 13 17 19 21 23 25 27 29 31 33 35 39 41 43 45 15 37 Half Hour Settlement Periods
Slide 16: How did it turn out?
How did it turn out? · Various participants achieved a DP availability higher than that notified at the time of NISM issue (reflecting a market response which is welcomed by NGT). · 228MW of additional output secured via Pre-Gate Balancing Mechanism Unit Transaction (PGBT) · Export on the Anglo-Fren
Slide 17: How did it turn out?
How did it turn out? 50.15 50.1 50000 MW 50.05 NISM for Wednesday 10th March cancelled 49500 MW at 2000hrs once system margins had 50 returned to normal. 49000 MW 49.95 48500 MW System Frequency System Demand 49.9 48000 MW 49.85 18:00 18:01 18:03 18:04 18:06 18:07 18:09 18:10 18:12 18:13 18:15 18:16
Slide 18: An interesting day... Wednesday 10th March 2004
An interesting day……… Wednesday 10th March 2004 Nick Easton Operational Energy Manager - A Team Operations & Trading UK Transmission