7/26/2019 Lag Hari 2015

1/5

Abstract The successful islanding operation of distribution

system requires an efficient islanding detection technique and

under frequency load shedding scheme. The islanding detection

technique is necessary to detect accurately the islanding

phenomenon and under frequency load shedding scheme is

essential to control frequency when the load exceeds the

generation. This paper presents a new strategy for successful

islanding operation of distribution system connected with

rotating type DGs. The proposed strategy mainly consists ofthree stages. First stage uses an islanding detection technique to

detect islanding event correctly. The second stage calculates the

load amount to be shed. Finally, the third stage performs under

frequency load shedding to recover the frequency to its nominal

value. The proposed strategy is tested on an 11 kV Malaysian

distribution system. The simulation results show that proposed

strategy successfully performed the islanding operation by

shedding accurate amount of loads.

Index Terms Islanding Operation, Mini Hydro, Distributed

Generation, Islanding detection, under frequency load shedding.

dQ/dt

7/26/2019 Lag Hari 2015

2/5

dQ/dt

dQ/dt

= NnsCombinatioofNoMax

N

= ncombinatioii PLSAEerror Errori i

thLSA = Pi_combination i

th

DG 1

Bus1000

DG 2

Bus1012

Bus1013

Bus1075

Bus1046

Bus1018

Bus1019

Bus1020

Bus1047

Bus1079

Bus1004 Bus1141

Bus1151

Bus1010

Bus1039

Bus1064 Bus1029 Bus1050

Bus1154

Bus1057

Bus1058

1056

GBRK

LBRK

NOP

Bus2000

GBus1

GBus 2

Grid

TBus1

TBus 2

Load1

Load2

Load3

Load4

Load5

Load7

Load6

Load8

7/26/2019 Lag Hari 2015

3/5

t=10 s dQ/dt dQ/dt dQ/dt

dQ/dt dQ/dt

A. Islanding Operation at 0.9MW Power Mismatch

dQ/dt

dQ/dt

dQ/

dt

t =10s dQ/dt dQ/dt dQ/dt

7/26/2019 Lag Hari 2015

4/5

3,4

B. Islanding Operation at 0.6MW Power Mismatch

dQ/dt t=10s dQ/dt

dQ/dt

7/26/2019 Lag Hari 2015

5/5

dQ/dt

dQ/dt dQ/dt

International Journal of Electrical Power & Energy Systems,

International Review of Electrical Engineering (I.R.E.E),

Energy Conversion and Management,

Energy Conversion and Management,

Power and Energy Society General Meeting, 2011 IEEE

IEEE Transactions on Power Delivery,

International Journal of Electrical Power &

Energy Systems,

Power SystemTechnology, 2004. PowerCon 2004. 2004 International

Conference on

Power Systems, IEEETransactions on,

IEEE Transactions on Power Delivery,

IEEE Transactions on Power Systems,

ExpertSystems with Applications,

IEEE Power Engineering Society Summer Meeting

Energy Conversion and Management,