Presentation of Primary Support application results on G2Elab-Predis Off-Grid test bench.

1. 4kW Synchronous
Machine
Γ,Ω
ifmcc
DC Machine
ifms
Limit of the micro-grid
450W 3-phases
baseload
E-boxE-boxE-box
x5
25W 25W 25W
Coordination
agent
mechanical
transmission
49.4 49.5 49.6 49.7 49.8 49.9 50 50.1 50.2
60
70
80
90
100
110
120
130
140
150
Expected and Obtained droop curve. Regulation Slope:4 W/mHz
Frequency (in Hz)
Powerofthedispatchableloads(inW)
-130 -110 -90 -70 -50 -30 -10 10 30 50 70 90 110 130 150
0
1
2
3
4
5
Frequency Deviation to Regulation stages. Regulation Slope:4 W/mHz
Deviation range, per step of_20 mHz
Deviationoccuranceperdeviationrange(in%)
Values out of bounds:15.8%
Deviation lower than the
Energy-box frequency
precision (+/-10mHz)
Demonstration feed-back on reduced scale
µnetwork
• The magnitude of steady-state microgrid
frequency deviations are reduced by the
demand-based regulation introduced.
• The sudden frequency-drop tests demonstrate
the energy-boxes ability to handle the frequency
droop: both frequency drop delays ∆Td and
magnitude ∆Fd are reduced by the regulation
scheme.
• The approached droop curve is well respected in
demonstration (≈ 84.2%)
Domestic Demand Response for
Primary Control Support
G. Lebel1, K. Kuypers1, R. Caire1 & N. HadjSaid1
S. Bediou² & A. Glatigny²
1Univ. Grenoble Alpes, G2Elab, F-38000 Grenoble, France / CNRS, G2Elab, F-38000 Grenoble, France
²Energy Division, Schneider Electric Industries F-38000 Grenoble, France
Presentation of the frequency regulation platform and the field test
CIGRE International Colloquium
Lightning & Power Systems - INSA de Lyon – 2014, may 13rd
Benefit of the regulation for the microgrid’s frequency stabilization in steady-state operation
Concept
Grenoble Electrical Engineering Laboratory has
developed, in collaboration with Schneider Electric
an agent-based platform to perform fast load-
shedding of domestic loads.
The shedding strategy designed enables to
reproduce on the demand side, thanks to a
domestic energy box, the frequency droop pattern,
that a bulk power unit applies to provide Primary
Control margins to the Transmission System
Operator.
Such service could replace part of the conventional
Primary Control means or be used by the DSO as a
substitute of their emergency load-shedding tool.
Micro-grid response to a major outage, with and without Demand Response – based regulation
Contractual and obtained droop curve. Deviation to the droop curve
KEY
WORDS
VIRTUAL POWER PLANT, DEMAND RESPONSE, ANCILLARY
SERVICES, DISTRIBUTED FREQUENCY CONTROL,
CUSTOMER ENERGY MANAGEMENT SYSTEM
2 3 4 5 6 7 8 9 10 11 12 13 14 15
49.4
49.5
49.6
49.7
49.8
49.9
50
50.1
Response of the test bench face to a sudden loading on the system
Time (in s)
Frequency(inHz)
∆Td
ON
∆Td
OFF
∆Fd
ON
∆Rd
ON
∆Fd
OFF
∆Rd
OFF
Demonstration Results
Data Analysis
With
Regulation
(ON)
Without
Regulation
(OFF)
Number of tests 15 12
Frequency drop ∆Fd
observed on the field
test (in mHz)
Mean Drop 455 547
Max Drop 514 584
Min Drop 307 492
Standard Dev. 50 29
Rebound effect ∆Rd
observed after the
gap (in mHz)
Mean Rebound 72 81
Max Rebound 118 115
Min Rebound 12 54
Standard Dev. 28 17
Frequency drop
delay observed ∆Td
(Sampling period:
260ms)
Number of occurance
785ms 11 2
1045ms 3 8
1310ms 1 2
Mean Delay 872ms 1046ms
10 20 30 40 50 60 70 80 90
49.8
49.9
50
50.1
50.2
Field Test Frequency and dispatchable power over the time
Time (in min)
Frequency(inHz)
10 20 30 40 50 60 70 80 90
60
70
80
90
100
110
120
130
140
150
160
170
180
Time (in min)
Power(inW)
-180-160-140-120-100 -80 -60 -40 -20 0 20 40 60 80 100 120 140 160 180 200
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Frequency Deviation to the mean frequency. Regulation slope:1.35 W/mHz
Deviation range, per step of_10 mHz
Deviationoccuranceperdeviationrange(in%)
Without Regulation
With Regulation
0 10 20 30 40 50 60 70 80 90 100 110 120
49.8
49.9
50
50.1
50.2
Field Test Frequency and dispatchable power over the time
Time (in min)
Frequency(inHz)
0 10 20 30 40 50 60 70 80 90 100 110 120
40
50
60
70
80
90
100
110
120
130
140
150
160
170
180
Time (in min)
Power(inW)
Points out
of bounds