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GREDOR 
Gestion des Réseaux Electriques de 
Distribution Ouverts aux Renouvelables 
! 
Task 3 - Operational Planning 
General meeting 
Q. Gemine - ULg 
January 27, 2014 
!1
Operational planning 
GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables 
!2 
Goal ? 
Anticipate and prevent, in the short term, insecure operation situations.
Operational planning 
Goal ? 
Anticipate and prevent, in the short term, insecure operation situations. 
GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables 
!2 
When ? 
Before real time operation.
Operational planning 
Goal ? 
Anticipate and prevent, in the short term, insecure operation situations. 
GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables 
!2 
When ? 
Before real time operation. 
How ? 
Using a set of actions provided to the Distribution System Operator.
Insecure operation situations 
An electrical state is insecure if the 
operational limits of a network component 
are violated. 
GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables 
!3 
Voltage limits at buses: 
Bus i Vi ≤ Vi ≤ V̅i 
e.g. : 0.95 p.u. ≤ Vi ≤ 1.05 p.u.! 
with 1 p.u. = 15 kV 
Current limit within links: 
Bus i Bus j 
|Iij| ≤Iij̅
Decision framework 
What does "before real time operation" means? 
… … 
GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables 
!4 
Intraday 
15 min 15 min 15 min … 15 min 
Day-ahead 
DA 
closure 
Time 
Potential decision stages
Decision framework 
To prevent insecure situations, the future state of the grid needs to be 
anticipated. Because some phenomena are uncertain, more than one 
future might be credible. 
GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables 
!5 
Time 
?
Decision framework 
To prevent insecure situations, the future state of the grid needs to be 
anticipated. Because some phenomena are uncertain, more than one 
future might be credible. 
GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables 
!5 
Time 
? 
100% 
50% 
0% 
Scenario 1 
Scenario 2 
Scenario 3 
Each realization of the uncertain phenomena corresponds to a scenario.
Decision framework 
To prevent insecure situations, the future state of the grid needs to be 
anticipated. Because some phenomena are uncertain, more than one 
future might be credible. 
GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables 
!5 
Time 
? 
100% 
50% 
0% 
Scenario 1 
Scenario 2 
Scenario 3 
Each realization of the uncertain phenomena corresponds to a scenario.
Scenario trees 
GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables 
!6 
At each decision stage, there is some uncertainty for the periods to 
come. 
Time 
Each path in the tree is a scenario.
Actions 
GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables 
!7 
The actions considered for operational planning can be classified into 
two categories: 
A. network reconfiguration (transparent to users) 
‣ transformer ratios 
‣ compensators 
‣ topological changes 
B. modulation of power injections (affect users) 
‣ production curtailment 
‣ load modulation (demand side management)
Illustrative Example 
GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables 
!8 
Time 
100% 
50% 
0%
Illustrative Example 
GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables 
!8 
Time 
100% 
50% 
0% 
P 
P 
P
Illustrative Example 
GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables 
!8 
Time 
100% 
50% 
0% 
P 
P 
P
Illustrative Example 
GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables 
!8 
Time 
100% 
50% 
0% 
P 
P 
P 
€
Illustrative Example 
GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables 
!8 
Time 
100% 
50% 
0% 
P 
P 
P 
€€€ 
€
Illustrative Example 
GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables 
!8 
Time 
100% 
50% 
0% 
P 
P 
P 
€€€ 
€ 
Solution A: 
€ 
+ 
€€€ 
€€€€
Illustrative Example 
GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables 
!8 
Time 
100% 
50% 
0% 
P 
P 
P 
€€€ 
€ 
Solution A: 
€ 
+ 
€€€ 
€€€€ 
Alternative?
Illustrative Example 
GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables 
!8 
Time 
100% 
50% 
0% 
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P 
P 
€€€ 
€ 
Solution A: 
€ 
+ 
€€€ 
€€€€ 
?
Illustrative Example 
GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables 
!8 
Time 
100% 
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P 
P 
€€€ 
€ 
Solution A: 
€ 
+ 
€€€ 
€€€€ 
V€
Illustrative Example 
{ 
GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables 
!8 
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Solution A: 
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Illustrative Example 
{ 
GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables 
!8 
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Solution A: 
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Illustrative Example 
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Solution A: 
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Illustrative Example 
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!8 
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!8 
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Solution B: + €€
Optimization problem 
GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables 
!9 
min expected cost of operation 
s.t. no insure operation situation 
among scenarios
Optimization problem 
GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables 
!9 
min expected cost of operation 
s.t. no insure operation situation 
among scenarios 
Objective
Optimization problem 
GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables 
!9 
min expected cost of operation 
s.t. no insure operation situation 
among scenarios 
Objective { 
Constraints
Optimization problem 
GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables 
!9 
min expected cost of operation 
s.t. no insure operation situation 
among scenarios 
Objective { 
Constraints
Optimization problem 
GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables 
!9 
min expected cost of operation 
s.t. no insure operation situation 
among scenarios 
Objective { 
Constraints
Optimization problem 
GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables 
!9 
min expected cost of operation 
s.t. no insure operation situation 
among scenarios 
Objective { 
Constraints
Optimization problem 
Because of the power flow equations and of the time-coupling nature 
of the problem, it is very complex to solve and it cannot be addressed 
by out-of-the-box software solutions. 
GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables 
!10
Optimization problem 
Because of the power flow equations and of the time-coupling nature 
of the problem, it is very complex to solve and it cannot be addressed 
by out-of-the-box software solutions. 
GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables 
!10
Optimization problem 
Because of the power flow equations and of the time-coupling nature 
of the problem, it is very complex to solve and it cannot be addressed 
by out-of-the-box software solutions. 
GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables 
!10
Optimization problem 
Because of the power flow equations and of the time-coupling nature 
of the problem, it is very complex to solve and it cannot be addressed 
by out-of-the-box software solutions. 
GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables 
!10
Optimization problem 
Because of the power flow equations and of the time-coupling nature 
of the problem, it is very complex to solve and it cannot be addressed 
by out-of-the-box software solutions. 
GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables 
!10 
?
Optimization problem 
GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables 
!11 
Because of the complexity, we must use simplified versions of the 
original problem, called relaxations.
Optimization problem 
GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables 
!11 
Because of the complexity, we must use simplified versions of the 
original problem, called relaxations. 
These last months, we focused on designing a relaxation that would 
feature both: 
• a good approximation of the original problem 
• an acceptable computationally complexity
Current progress 
Current state of the art GREDOR prototype 
Approximation 
quality 
Computational 
complexity 
GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables 
!12
Current progress 
Current state of the art GREDOR prototype 
Approximation 
quality 
Computational 
complexity 
GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables 
!12
Current progress 
Current state of the art GREDOR prototype 
Approximation 
quality 
Computational 
complexity 
GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables 
!12
Computational complexity 
10000 
100 
GREDOR 
benchmark 
1.207 
Standard 
benchmark 
82 111 
254,7 
38,7 40,7 
GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables 
!13 
Time (s) 
1 
6 buses 9 buses 14 buses 
Results for standard test networks with 8 periods and 9 decision stages.
Future work 
GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables 
!14 
We are going focus on three main research axis: 
•improve the design of the relaxation the solve the problem of 
operational planning both faster and more accurately 
•simulate the operational planning tool on some test networks of 
RESA and ORES 
•provide a quantification mean to evaluate the interaction 
mechanisms designed in task 1

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Operational Planning for Smart Distribution Grids

  • 1. GREDOR Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables ! Task 3 - Operational Planning General meeting Q. Gemine - ULg January 27, 2014 !1
  • 2. Operational planning GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables !2 Goal ? Anticipate and prevent, in the short term, insecure operation situations.
  • 3. Operational planning Goal ? Anticipate and prevent, in the short term, insecure operation situations. GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables !2 When ? Before real time operation.
  • 4. Operational planning Goal ? Anticipate and prevent, in the short term, insecure operation situations. GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables !2 When ? Before real time operation. How ? Using a set of actions provided to the Distribution System Operator.
  • 5. Insecure operation situations An electrical state is insecure if the operational limits of a network component are violated. GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables !3 Voltage limits at buses: Bus i Vi ≤ Vi ≤ V̅i e.g. : 0.95 p.u. ≤ Vi ≤ 1.05 p.u.! with 1 p.u. = 15 kV Current limit within links: Bus i Bus j |Iij| ≤Iij̅
  • 6. Decision framework What does "before real time operation" means? … … GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables !4 Intraday 15 min 15 min 15 min … 15 min Day-ahead DA closure Time Potential decision stages
  • 7. Decision framework To prevent insecure situations, the future state of the grid needs to be anticipated. Because some phenomena are uncertain, more than one future might be credible. GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables !5 Time ?
  • 8. Decision framework To prevent insecure situations, the future state of the grid needs to be anticipated. Because some phenomena are uncertain, more than one future might be credible. GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables !5 Time ? 100% 50% 0% Scenario 1 Scenario 2 Scenario 3 Each realization of the uncertain phenomena corresponds to a scenario.
  • 9. Decision framework To prevent insecure situations, the future state of the grid needs to be anticipated. Because some phenomena are uncertain, more than one future might be credible. GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables !5 Time ? 100% 50% 0% Scenario 1 Scenario 2 Scenario 3 Each realization of the uncertain phenomena corresponds to a scenario.
  • 10. Scenario trees GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables !6 At each decision stage, there is some uncertainty for the periods to come. Time Each path in the tree is a scenario.
  • 11. Actions GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables !7 The actions considered for operational planning can be classified into two categories: A. network reconfiguration (transparent to users) ‣ transformer ratios ‣ compensators ‣ topological changes B. modulation of power injections (affect users) ‣ production curtailment ‣ load modulation (demand side management)
  • 12. Illustrative Example GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables !8 Time 100% 50% 0%
  • 13. Illustrative Example GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables !8 Time 100% 50% 0% P P P
  • 14. Illustrative Example GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables !8 Time 100% 50% 0% P P P
  • 15. Illustrative Example GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables !8 Time 100% 50% 0% P P P €
  • 16. Illustrative Example GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables !8 Time 100% 50% 0% P P P €€€ €
  • 17. Illustrative Example GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables !8 Time 100% 50% 0% P P P €€€ € Solution A: € + €€€ €€€€
  • 18. Illustrative Example GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables !8 Time 100% 50% 0% P P P €€€ € Solution A: € + €€€ €€€€ Alternative?
  • 19. Illustrative Example GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables !8 Time 100% 50% 0% P P P €€€ € Solution A: € + €€€ €€€€ ?
  • 20. Illustrative Example GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables !8 Time 100% 50% 0% P P P €€€ € Solution A: € + €€€ €€€€ V€
  • 21. Illustrative Example { GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables !8 Time 100% 50% 0% P P P €€€ € Solution A: € + €€€ €€€€ V€
  • 22. Illustrative Example { GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables !8 Time 100% 50% 0% €€€ € Solution A: € + €€€ €€€€ V€ P P P
  • 23. Illustrative Example { GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables !8 Time 100% 50% 0% €€€ Solution A: € + €€€ €€€€ V€ P P P
  • 24. Illustrative Example { GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables !8 Time 100% 50% 0% Solution A: € + €€€ €€€€ V€ P P P €
  • 25. Illustrative Example { GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables !8 Time 100% 50% 0% Solution A: € + €€€ €€€€ V€ P P P € V€ € Solution B: + €€
  • 26. Optimization problem GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables !9 min expected cost of operation s.t. no insure operation situation among scenarios
  • 27. Optimization problem GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables !9 min expected cost of operation s.t. no insure operation situation among scenarios Objective
  • 28. Optimization problem GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables !9 min expected cost of operation s.t. no insure operation situation among scenarios Objective { Constraints
  • 29. Optimization problem GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables !9 min expected cost of operation s.t. no insure operation situation among scenarios Objective { Constraints
  • 30. Optimization problem GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables !9 min expected cost of operation s.t. no insure operation situation among scenarios Objective { Constraints
  • 31. Optimization problem GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables !9 min expected cost of operation s.t. no insure operation situation among scenarios Objective { Constraints
  • 32. Optimization problem Because of the power flow equations and of the time-coupling nature of the problem, it is very complex to solve and it cannot be addressed by out-of-the-box software solutions. GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables !10
  • 33. Optimization problem Because of the power flow equations and of the time-coupling nature of the problem, it is very complex to solve and it cannot be addressed by out-of-the-box software solutions. GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables !10
  • 34. Optimization problem Because of the power flow equations and of the time-coupling nature of the problem, it is very complex to solve and it cannot be addressed by out-of-the-box software solutions. GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables !10
  • 35. Optimization problem Because of the power flow equations and of the time-coupling nature of the problem, it is very complex to solve and it cannot be addressed by out-of-the-box software solutions. GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables !10
  • 36. Optimization problem Because of the power flow equations and of the time-coupling nature of the problem, it is very complex to solve and it cannot be addressed by out-of-the-box software solutions. GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables !10 ?
  • 37. Optimization problem GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables !11 Because of the complexity, we must use simplified versions of the original problem, called relaxations.
  • 38. Optimization problem GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables !11 Because of the complexity, we must use simplified versions of the original problem, called relaxations. These last months, we focused on designing a relaxation that would feature both: • a good approximation of the original problem • an acceptable computationally complexity
  • 39. Current progress Current state of the art GREDOR prototype Approximation quality Computational complexity GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables !12
  • 40. Current progress Current state of the art GREDOR prototype Approximation quality Computational complexity GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables !12
  • 41. Current progress Current state of the art GREDOR prototype Approximation quality Computational complexity GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables !12
  • 42. Computational complexity 10000 100 GREDOR benchmark 1.207 Standard benchmark 82 111 254,7 38,7 40,7 GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables !13 Time (s) 1 6 buses 9 buses 14 buses Results for standard test networks with 8 periods and 9 decision stages.
  • 43. Future work GREDOR - Gestion des Réseaux Electriques de Distribution Ouverts aux Renouvelables !14 We are going focus on three main research axis: •improve the design of the relaxation the solve the problem of operational planning both faster and more accurately •simulate the operational planning tool on some test networks of RESA and ORES •provide a quantification mean to evaluate the interaction mechanisms designed in task 1