EFACECMaia 31.01.20

AZORES

➢ The archipelago of Azores is made up of ninevolcanic islands each with 9 independentPower Systems

INTRODUCTION

➢ EDA, the Azorean Utility, has 120 years ofexperience in small and isolated electricsystems and use of renewable energies.➢ From 1900 to 1950, São Miguel Island was

only supplied by hydroelectric energy➢ To satisfy the increasing consumption, the

first diesel generator was installed at theHydro Power Plant of Fajã Redonda, whichbecame the first mixed power plant of theAzores

Wave energy power plant – 1999, PicoFirst wind farm – 1988, S. Maria

First electric power plant (Hydro) – 1899, S. Miguel

First geothermal power plant – 1980, S. Miguel

FACTS

➢ Mix of energy sources (thermal, geothermal, hydro, wind, urban waste, photovoltaeic, biogas, etc.. (39%renewable or endogenoussources 2018)

ISSUES OF SMALL POWER SYSTEMS

➢ Low short circuit currents➢ Lack of frequency stability due to low inertia➢ Renewable curtailment mainly at off peak

hours

49,549,649,749,849,9

5050,150,250,350,450,5

00

:00

:00

.00

0.0

00

00

:00

:03

.58

0.0

00

00

:00

:07

.16

0.0

00

00

:00

:10

.74

0.0

00

00

:00

:14

.32

0.0

00

00

:00

:17

.90

0.0

00

00

:00

:21

.48

0.0

00

00

:00

:25

.06

0.0

00

00

:00

:28

.64

0.0

00

00

:00

:32

.22

0.0

00

00

:00

:35

.80

0.0

00

00

:00

:39

.38

0.0

00

00

:00

:42

.96

0.0

00

00

:00

:46

.54

0.0

00

00

:00

:50

.12

0.0

00

00

:00

:53

.70

0.0

00

00

:00

:57

.28

0.0

00

00

:01

:00

.86

0.0

00

00

:01

:04

.44

0.0

00

00

:01

:08

.02

0.0

00

00

:01

:11

.60

0.0

00

00

:01

:15

.18

0.0

00

00

:01

:18

.76

0.0

00

00

:01

:22

.34

0.0

00

00

:01

:25

.92

0.0

00

00

:01

:29

.50

0.0

00

00

:01

:33

.08

0.0

00

00

:01

:36

.66

0.0

00

Terceira island frequency

FLYWHEELS

Introduced by EDA in 2004The equipment is able to take or provide 500kW for a maximum period of approximately30 seconds (16,5MJ), with a ramp-up time ofapproximately 4 ms to change from 0 to +/-500 kW

FLYWHEELS

➢ Frequency improvement

SIZING OF BATTERY ENERGY STORAGE SYSTEM

Technical criteria:➢ Spinning reserve➢ Frequency and voltage regulation➢ Renewables penetration increasing➢ Black start

MICROGRID HYBRID SYSTEMS

Graciólica BESS Project since July 2019(EDA partner)

➢ WPP 5x900 kW (E44)➢ PV ( 1 MWp)➢ BPP (3x2,475 MW/2,6 MWh)➢ DPP:

➢ 2x750 kVA:➢ 1x762 kVA;➢ 1x1100 kVA➢ 2x1287 kVA

MICROGRID HYBRID SYSTEMS

Advantages:Frequency and voltage control

MICROGRID HYBRID SYSTEMS

Advantages:Increased reliability

SAIDI (System AverageInterruption Duration Index)

Since 17th July 19, “0” (ZERO)load shedding occurrencesby genset tripping!

49,5

49,6

49,7

49,8

49,9

50

50,1

50,2

50,3

50,4

50,5

8,5

8,55

8,6

8,65

8,7

8,75

8,8

8,85

8,9

8,95

9

21

:57

:49

.18

0.0

00

21

:57

:50

.86

0.0

00

21

:57

:52

.54

0.0

00

21

:57

:54

.22

0.0

00

21

:57

:55

.90

0.0

00

21

:57

:57

.58

0.0

00

21

:57

:59

.26

0.0

00

21

:58

:00

.94

0.0

00

21

:58

:02

.62

0.0

00

21

:58

:04

.30

0.0

00

21

:58

:05

.98

0.0

00

21

:58

:07

.66

0.0

00

21

:58

:09

.34

0.0

00

21

:58

:11

.02

0.0

00

21

:58

:12

.70

0.0

00

21

:58

:14

.38

0.0

00

21

:58

:16

.06

0.0

00

21

:58

:17

.74

0.0

00

21

:58

:19

.42

0.0

00

21

:58

:21

.10

0.0

00

21

:58

:22

.78

0.0

00

21

:58

:24

.46

0.0

00

21

:58

:26

.14

0.0

00

21

:58

:27

.82

0.0

00

21

:58

:29

.50

0.0

00

21

:58

:31

.18

0.0

00

21

:58

:32

.86

0.0

00

21

:58

:34

.54

0.0

00

Freq

uen

cy [

Hz]

Vo

ltag

e [

kV]

GENSET3 TRIP

kV RMS H1 - Barras_1-UL1 kV RMS H1 - Barras_1-UL2

kV RMS H1 - Barras_1-UL3 Hz Frequency - Barras_1-UL1

MICROGRID HYBRID SYSTEMS

Advantages:Fulfill EN 50160 harmonics standards

August 18 August 19 (+Hybrid)

MICROGRID HYBRID SYSTEMS

Advantages:Renewable energy integration capacity (100%!)

0

500

1000

1500

2000

2500

3000

3500

00

:00

01

:30

03

:00

04

:30

06

:00

07

:30

09

:00

10

:30

12

:00

13

:30

15

:00

16

:30

18

:00

19

:30

21

:00

22

:30

00

:00

Po

tên

cia

[MW

]

Solar [MW]

Wind [MW]

20.01.20

MICROGRID HYBRID SYSTEMS

Advantages (≈40 MWh daily):Reduced Emission

- 4500 liters diesel/daily- 12 tons CO2/daily

Saved Money- 2873 euros/daily diesel- 32,5 h/daily gensets running 0

500

1 000

1 500

2 000

2 500

00

:00

01

:30

03

:00

04

:30

06

:00

07

:30

09

:00

10

:30

12

:00

13

:30

15

:00

16

:30

18

:00

19

:30

21

:00

22

:30

00

:00

Po

tên

cia

[MW

]

20.01.20

19.08.19

MICROGRID HYBRID SYSTEMS

Disadvantages:Low short circuit current(BESS contribution ≈ 300 A)

IED trip time ≈ 140msCB open time ≈ 80msSetting I>65 NI 0,05

Thanks!

joaleixo@eda.pt