IEEE Power & Energy Magazine - November/December 2020 - 23

coupled with D-PVs at residential premises in suburban
Adelaide. Operational data from the trial demonstrates the
evolution of DER integration challenges in the distribution
network. VPP implications for system operation are considered in a later section.
Historically, the primary concern for planners and
operators has been ensuring that network thermal limits are not breached during peak demand load days ( a in
Figure 5). High levels of D-PV generation make voltage

80

1,600
PV Generation
Load
PV Contribution

70

1,200

60

1,000

50

800

40

600

30

400

20

200

10

0

12:00 a.m.
12:45 a.m.
1:30 a.m.
2:15 a.m.
3:00 a.m.
3:45 a.m.
4:30 a.m.
5:15 a.m.
5:45 a.m.
6:30 a.m.
7:15 a.m.
8:00 a.m.
8:45 a.m.
9:30 a.m.
10:15 a.m.
11:00 a.m.
11:45 a.m.
12:30 p.m.
1:15 p.m.
2:00 p.m.
2:45 p.m.
3:30 p.m.
4:15 p.m.
5:00 p.m.
5:45 p.m.
6:30 p.m.
7:15 p.m.
8:00 p.m.
8:45 p.m.
9:30 p.m.
10:15 p.m.
11:00 p.m.
11:45 p.m.

(MW)

1,400

PV Contribution to South Australian Load (%)

planning, and operation. Figure 4 illustrates the increased
scope and depth of planning for DNSPs. In addition to considering the peak demand, network planners and operators
now need to estimate the minimum and underlying demands
(without D-PV generation). However, there remains very
limited visibility of DERs and, indeed, the low-voltage (LV)
network. Trials provide much needed insight into actual
operational conditions and illustrate key challenges. For
instance, SAPN's Salisbury VPP trial connected 100 BESSs

0

figure 2. The D-PV contribution to the minimum net load in South Australia on 10 November 2019.

1,000
2006, 953 MW
800
2013, 598 MW
2014, 517 MW

600

2015, 507 MW
2016, 454 MW

400

January 2018, 361 MW

ht
ni
g
M
id

00

p.

m
6:

00

p.

p.
m
0

p.
00

3:
0

m

.
12
:

9:

00

a.

m

.
a.

m

.
6:
00

3:

00

a.

m

gh
t
id
ni

m

2019, 62 MW

0

M

5 November 2006
3 November 2013
2 November 2014
22 November 2015
6 November 2016
1 January 2018
21 October 2018
10 November 2019

October 2018, 250 MW

200

9:

SAPN Minimum Loads
(Excluding Major Customers) (MW)

1,200

Australian Eastern Standard Time

figure 3. The SAPN minimum load days. Major customers are excluded, while major generation is included. D-PVs are
netted off as a negative load.
november/december 2020	

ieee power & energy magazine 	

23



IEEE Power & Energy Magazine - November/December 2020

Table of Contents for the Digital Edition of IEEE Power & Energy Magazine - November/December 2020

Contents
IEEE Power & Energy Magazine - November/December 2020 - Cover1
IEEE Power & Energy Magazine - November/December 2020 - Cover2
IEEE Power & Energy Magazine - November/December 2020 - Contents
IEEE Power & Energy Magazine - November/December 2020 - 2
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IEEE Power & Energy Magazine - November/December 2020 - Cover3
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