1 Smart Energy Systems Laboratory Applications Department of Energy Technology Aalborg University
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1
Smart Energy SystemsLaboratory
Applications
Department of Energy TechnologyAalborg University
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Architecture
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3
Applications
• Application #1 Wind Power Plant Control– Voltage control for a WPP augmented with STATCOM
• Application #2 Demand Response Platform– Control and Market integration of Low Voltage distribution grids
• Application #3 Smart Grid Control– Power Balancing and Voltage Control in distribution grids
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Application #1 WPP Control
Authors:Lennart Petersen, Fitim Kryezi
• Dynamic voltage control
• Challenges of incorporation of WTGs and STATCOMs
• Tuning and optimization of park control
MSc Thesis proposal:
http://projekter.aau.dk/projekter/da/studentthesis/wind‐power‐plant‐control‐optimisation‐with‐embedded‐application‐of‐wind‐turbines‐and‐statcoms(5de64d29‐a840‐4d22‐bf8f‐3c1fc39c42c5).html
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Application #1 WPP Control
Main Components• Different external grid stiffness• 2 STATCOMs• 29 km Export cable• 35 Wind Turbines (type-4)
Control Design Criteria• According to UK Grid Code• Dynamic response of the reactive power
output– Delay time– Rise time– Settling time– Overshoot
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Application #1 WPP Control Real‐Time Implementation
Plant Control Algorithm
External GridInternal WPP layoutDiscrete State‐Space Models for WTGs
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Application #1 WPP Control
without STATCOM: with STATCOM:
• Discrete-event simulation (closed-loop) vs. step response (open-loop) Validation of control design & tuning Accurate representation of grid events
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Application #1 WPP Control
without STATCOM: with STATCOM:
• Discrete-event simulation (closed-loop) of whole plant system: Voltage constraints within WPP Reactive power capability limits of WTGs
,
,
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Application #2 Demand Response
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Application #2 Demand Response
38 houses in a low voltage (LV)grid- 8 electric cars charging in 1-2
intervals per day- 5 kW electric heating in winter- PV generation in every house
LV Grid
No control (no DMC) Baseline DMC: no loading limit in secondary substation transformer & fixed prices. Excessive consumption: reduce load if demand exceeds loading limit Excessive generation: limit overall injected power into LV grid Interruption – communication failures Spot price used for demand control
Scenarios
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Application #2 Demand ResponseResults
‐20
0
20
40
60
80
100
120
1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51 53 55 57 59 61 63 65 67 69 71 73 75 77 79 81 83 85 87 89 91 93 95
load setpoint
Demand limit set to 70 kW Reference power is always below limit
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Application #2 Demand ResponseResults: Impact of temporary energy price increase
0
10
20
30
40
50
60
70
80
90
100
67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84
kW
period
impact of increased price +10 between 18:00‐19:00 on total load
load: increased price baseline load delta price
+10€/MWh
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Application #2 Demand ResponseResults: Resilient Operation
‐60
‐40
‐20
0
20
40
60
80
52 54 56 58 60 62 64 66 68 70 72 74 76 78 80 82 84 86 88 90 92 94 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50
network failure between periods 60‐76
total load setpoint
discon
nected
Interruption scenario: • Household become suddenly disconnected from DMC. • Benefit : Cached plan is followed by local algorithmChanges in consumption cannot be coordinated by the DMC
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Application #2 Demand ResponseQualitative Evaluation of Demand Management Scheme
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Application #3 Smart Grid Control
Control Objectives Loss minimization Power balancing Voltage control
Functional focus Control functionality Monitoring framework
functionalities- Reliable connections- Information access scheduling
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Application #3 Smart Grid ControlPower Balancing
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Application #3 Smart Grid ControlPower Balancing
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Application #3 Smart Grid ControlPower Balancing
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Application #3 Smart Grid ControlVoltage Control
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Application #3 Smart Grid Control
0.4 kV
20 kV
B14
B15
B10
B16 B17
B18 B19 B20
B21 B22 B23
B24 B26B25
B27 B28 B29
B30 B45
B31 B32
B33 B34
B35
B37
B39
B41
B36
B38
B40
B42
B43 B44
B48
B47B46
B49
B50
B51
B53B52
B54
PV PV
PV
PV
PV
PV
PV
PV
PV PV
PV
PV
PV
PV
PV
PV
PV
PV
PV
PV
PV
Voltage Control
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On‐going ApplicationsPSO‐ForskEl RePlan
Focus Renewable generation plants HV & MV Coordinated Grid Support
Control Functionalities Frequency Voltage Rotor Angle Stability
Partners: AAU-WCN, DTU-VES, DTU-Elektro, Vestas
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On‐going ApplicationsPSO‐ForskEl RemoteGrid
Focus Advanced Metering Infrastructure LV Grids Increase Visibility of LV grids in DSO Control Centre
Functionalities Near RT State Estimation Advanced Monitoring Functionalities and Warning System
Partners: AAU-WCN, Kamstrup, Thy-Mors Energi
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Contact Info
Coordinator Smart Energy Systems LabDr. Florin Iov [email protected]
www.smart‐energy‐systems‐lab.et.aau.dk
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