6 last posters 26-09-2001 10:08 Page 3
“MORE CARE” ADVICE FOR SECURE OPERATION OF ISOLATED POWER
SYSTEMS WITH INCREASED RENEWABLE ENERGY PENETRATION & STORAGE
N. HATZIARGYRIOU, G. CONTAXIS,
NTUA, GREECE
G. KARINIOTAKIS, D. MAYER
ARMINES, FRANCE
M. MATOS, J.A. PECAS LOPES
INESC, PORTUGAL
J. HALLIDAY, G. DUTTON
CCLRC-RAL, UK
P. DOKOPOULOS, A. BAKIRTZIS
AUTH, GREECE
J. STEFANAKIS, A. GIGANTIDOU
PPC, GREECE
P.O’DONNELL, D. McCOY
ESB, IRELAND
M.J. FERNANDES, J.M.S. COTRIM, A.P.FIGUEIRA
EEM, PORTUGAL
THE
OBJECTIVE
MORE
CARE
DEVELOPMENT OF AN ADVANCED CONTROL SYSTEM TO ASSIST THE OPERATORS OF A LARGE
ISOLATED POWER SYSTEM TO :
MAXIMIZE THE INTEGRATION OF RENEWABLES
MAINTAIN A HIGH LEVEL OF SECURITY IN THE GRID
SYSTEM ARCHITECTURE
CASE STUDIES
PILOT CONTROL SYSTEM INSTALLED IN CRETE (GR) IN 1999.
PEAK LOAD : 360 MW,
INSTALLED POWER : 555 MW.
Steam:104MW
Diesel: 48MW
GAZ : 185MW
Comb. Cycle: 132MW
WIND (*) : 82 MW
PV (projected): 5MW
(*) Projected power for year 2000. Actually installed 17 MW.
UNIT COMITMENTS
SECURITY ASSESSMENT
IT PROVIDES AN OPERATION SCENARIO* FOR THE NEXT 8-48 HOURS
* (SWITCHING ACTIONS FOR THE CONVENTIONAL UNITS,, MAX LIMITS FOR
RENEWABLE PENETRATION)
REAL TIME SECURITY EVALUATION OF OPERATING SCENARIA
OR CURRENT STATES :
DETAILED SIMULATION OF THE POWER SYSTEM OPERATION
WARNING ON INSECURE STATES IN CASE
OF PRE-SPECIFIED DISTURBANCES
PRODUCTION COSTS, INDEPENDENT PRODUCERS ASPECTS,
TECHNICAL CONSTAINTS OF THE POWER UNITS…
2
3 ALTERNATIVE METHODS
START
ALTERNATIVE MODELS :
DECISION TREES (NTUA)
KERNEL REGRESSION TREES (INESC)
NEURAL NETWORK (INESC)
Load & renewable power
forecasts (H hours ahead)
GENETIC ALGORITHMS (INESC)
A COMBINATORIAL TECHNIQUE (NTUA)
G as2
Unit Commitment
(H hours ahead)
160
Steam1
Steam5
140
Steam6
120
Diesel
1
Dynamic Security
Assessment
Every t1
hours
G T4
180
Diesel
4
(MW)
100
Diesel
3
POWER
80
Diesel
2
60
Steam2
Steam3
Load & renewable power
forecasts (h hours ahead)
ECONOMIC DISPATCH
OPTIMIZES THE UNIT COMMITMENT SOLUTION IN ORDER TO
PROVIDE THE SET-POINTS OF THE CONVENTIONAL UNITS FOR
THE NEXT TIME-STEP (20 MINUTES AHEAD).
3 ALTERNATIVE MODELS :
40
Steam4
20
W P2
0
W P1
1
5
9
13
17
21
25
29
33
37
41
T IM E (hou rs)
Unit Commitment
(h hours ahead)
45
Load
Economic Dispatch
IMPLEMENTATION
FRIENDLY MAN-MACHINE INTERFACE
MODULAR (MODELS REDUNDANCY)
GENERIC SYSTEM DESCRIPTION (TRANSFERABILITY)
Dynamic Security
Monitoring
Every t2
minutes
W P3
EVOLUTIONARY PROGRAMMING (INESC)
GENETIC ALGORITHMS (AUTH)
CONSTRAINED LINEAR PROGRAMMING (NTUA)
THE MODELS CONSIDER :
SECURITY CONSTRAINTS FOR THE GENERATION &
TRANSMISSION SYSTEMS, POWER LOSSES, COSTS...
Set Points of Power Units
FORECASTING
GENERATION OF FORECASTS FOR THE POWER SYSTEM LOAD
AND THE PRODUCTION OF THE RENEWABLES FOR THE NEXT
PLANNING PERIOD OF 8-48 HOURS.
LOAD FORECASTING
3 METHODS DEVELOPED :
FUZZY NEURAL NETWORKS (Ecole des Mines)
LINEAR ARMA MODELS (RAL)
WINTER METHOD (NTUA)
WIND POWER FORECASTING
3 METHODS DEVELOPED :
FUZZY NEURAL NETWORKS (Ecole des Mines)
LINEAR ARMA MODELS (RAL)
MODEL BASED ON GEOGRAPHICALLY
DISTRIBUTED INFORMATION (AUTH)
References : ERK5-CT1999-00019