7/25/2019 Microgrid secondary control

1/16

DG 1 & 2 (33 kVA rating) DG 3 & 4 (25 kVA rating

DGs

0.1 0.05

420 390

15 10.5

20000 16000

Lines

Line 1 Line 2 Line

318 1847

Loads

Load 1 Load 2

(Per phase) 12kW (Per phase) 1

DG 1 & 2 (33 kVA rating) DG 3 & 4 (25 kVA rating

DGs

0.1 0.05

420 390

15 10.5

20000 16000

Lines

Line 1 Line 2 Line

Loads

Load 1 Load 2

12kW 1

7/25/2019 Microgrid secondary control

2/16

DG 1 & 2 (33 kVA rating) DG 3 & 4 (25 kVA rating)

DGs

0.1 0.05

420 390

15 10.5

20000 16000

Lines

Line 1 Line 2 Line 3

318 1847 318

DG 1 & 2 (33 kVA rating) DG 3 & 4 (25 kVA rating)

DGs

0.1 0.05

420 390

15 10.5

20000 16000

Lines

Line 1 Line 2 Line 3

7/25/2019 Microgrid secondary control

3/16

Increase to to restore the fre!enc"to reference #a$!e

Increase to to restore theto reference #a$!e

%re!enc" droop characteristic Vo$tage droop characteristic

7/25/2019 Microgrid secondary control

4/16

Microgrid

DG 1 DG NDG 2 DG 3

DG N-

1

Central

Controller

7/25/2019 Microgrid secondary control

5/16

Microgrid

DG 1 DG NDG 2 DG 3

DG N-

1

7/25/2019 Microgrid secondary control

6/16

=

=

=Local

Loads

Local

Loads

Loc

Load

Fuel

Cell

Micro-

turbine

Photo-

voltaic

Local Bus Local Bus Local Bus

Common Bus

Main grid

Isolation Switch

LineLineLine

Microgrid

Inverter

Inverter

Inverter

7/25/2019 Microgrid secondary control

7/16

=

=

=Local

Loads

Local

Loads

Local

Loads

Fuel

Cell

Micro-

turbine

Photo-

voltaic

Local Bus Local Bus Local Bus

C!!n "#$

ain grid

%$atin 'it*

LineLineLine

Microgrid

In#e

rter

In#erter

In#e

rter

7/25/2019 Microgrid secondary control

8/16

V

7/25/2019 Microgrid secondary control

9/16

C#rr+

7/25/2019 Microgrid secondary control

10/16

DG 1

DG 2 DG 3

DG 4

'eferenceVa$!e

7/25/2019 Microgrid secondary control

11/16

%i$ter

Poer a$c!$ation

7/25/2019 Microgrid secondary control

12/16

%i$ter

Poer a$c!$ation

7/25/2019 Microgrid secondary control

13/16

Vo$tageontro$$

er

!rrentontro$$

er

Poer

ontro$$er

a*c+d,

7/25/2019 Microgrid secondary control

14/16

7/25/2019 Microgrid secondary control

15/16

Infor-ation fro-neigh*o!ring DGs

a$c!$ator

-cK

.econdar"Vo$tage ontro$

7/25/2019 Microgrid secondary control

16/16

-

cK

a$c!$ator

Infor-ation froneigh*o!ring D

.econdar"#o$tage contro$