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Interconnecting DG into Network - page 15 / 29

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15

Substation

NP No. 1

 Loads

Potential for

Either

Network

Protector

No.1

or No. 2 to

Open

Under R

everse Power

if

DG Output Exceeds Flows On

Feeder 1 or Feeder 2

(F1 or F2)

For E

xample, if Net DG O

utput

is 250kW and E

ith

er F1 or F2

is

Less Than 250kW, Then the

Network Protector Could Open

Incoming

Transmission

Lines

NP No. 2

DG Provider

F

1

F

2

Reverse power could also be an issue for network feeders with DG installed .

NP = Network Protector

F = Feeder

Network Interconnection Opportunities and Challenges

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