REPORT
System Impact
Assessment Report
CONNECTION ASSESSMENT &
APPROVAL PROCESS
2nd Addendum Report
CAA ID:
2011-446
Project:
Adelaide Wind Energy Centre
Applicant: Kerwood Wind Inc
Market Facilitation Department
Independent Electricity System Operator
Date:
December 12, 2012
Document Name
System Impact Assessment Report
Issue
2nd Addendum Report
Reason for Issue
Revised connection transformer
Effective Date
December 12, 2012
© 2000, Independent Electricity System Operator.
System Impact Assessment Report
Proposed Changes and Notification of Conditional Approval
Proposed Changes and Notification of Conditional Approval
Transformer Change
The Bornish, Adelaide and Jericho Wind Energy Centres, as well as the Cedar Point II Wind Power
Project, are wind generating projects proposing to connect to 500 kV circuit B562L via a proponent
owned 121 kV network and 525 kV/121 kV autotransformer. System Impact Assessments (SIA) for the
Bornish, Adelaide and Jericho Wind Energy Centres (CAA ID 2011-443, CAA ID 2011-446 and CAA ID
2011-441 respectively) were conducted and the projects were initially given Notices of Conditional
Approval on December 21st 2011. The SIA for the Cedar Point II Wind Power project (CAA ID 2011443) was conducted and the project was given a Notice of Conditional Approval on June 4th 2012. Since
the Cedar Point Wind Power Project is being incorporated into the proponent owned network, SIA
addendums containing Notices of Conditional Approval for the Bornish, Adelaide and Jericho Wind
Energy Centres were issued on June 6th 2012.
The connection applicants (Bornish Wind LP, Kerwood Wind Inc., Jericho Wind Inc. and Suncor Energy
Products Inc.) are now proposing to connect to the 500 kV system via two separate 525 kV/121 kV/27.6
kV autotransformers, rather than with the single 525 kV/121 kV autotransformer that was part of the first
Addendum.
The IESO and Hydro One have examined the proposed change and concluded that it is not materially
different from the first Addendum’s application data, as the equivalent impedance of the proposed two
parallel transformer arrangement is similar to that of the single transformer previously assessed. Hydro
One will acknowledge the proposed change separately with a new CIA addendum, indicating that it is
acceptable.
Bruce Special Protection Scheme Requirement Change
The initial SIA report for the Adelaide Wind Energy Centre (the project) included a requirement for the
project to participate in the Bruce Special Protection Scheme (BSPS) requiring:
i.
ii.
iii.
Hydro One to modify the logic of the BSPS to transmit rejection signals to the project,
the procurement of duplicated and physically separated communication paths between Hydro
One’s central scheme and the project site, and
equipment to be installed at the project site to receive the signals and take action to trip or
runback your generation.
Subsequent to releasing the SIA report, the IESO conducted detailed studies for the Bruce area and
concluded that, at this time, the grid planning criteria can be met without the project participating in the
BSPS.
Therefore, the IESO does not require the project to participate in the Bruce SPS at this time. For now,
Hydro One does not need to modify the BSPS to transmit signals to the project, and the
telecommunication between Hydro One’s BSPS and the project for that purpose does not need to be in
place.
We however foresee that the incorporation of the project into the BSPS may be required in the future. To
allow for future incorporation of the project into the BSPS in a timely manner, the IESO requires that you
make at this time the necessary provisions in the design and construction of the project to install
equipment that is able to receive SPS signals from the BSPS, can automatically take action to reject or
runback the project’s generation upon receiving the SPS signals, and is able to send the arming status to
the IESO via telemetry or other approved means.
2nd Addendum Report – December 12, 2012
CAA ID 2011-446
1
System Impact Assessment Report
Transformer Data
Should the need arise in the future, we will direct you and Hydro One to install all the equipment required
for the project to participate in the BSPS, as described in the SIA report. We would expect your project to
be available for participation in the BSPS in no more than 9 months from our direction.
Notification of Conditional Approval
Therefore, the IESO recommends that a Notification of Conditional Approval for Connection be issued
for the Adelaide Wind Energy Centre subject to implementation of the requirements outlined in this SIA
Addendum and the previous SIA reports.
Transformer Data
Table 1: Previous step-up transformer data
Positive Sequence Configuration
Rating (MVA)
# of
Impedance (pu)
Transformation
Units
(ONAN/ONAF/ONAF)
HV-Side LV-Side
SB= 256 MVA
1
525kV/121kV
256/341/426 MVA
0.0022+j0.1
ULTC@ LV
±10 %, 33 steps
Δ
Yg
Taps
Table 2: New step-up transformers’ data
Configuration
Positive Sequence
Rating (MVA)
# of
Impedance (pu) HV- LVTransformation
Units
(ONAN/ONAF/ONAF)
Tert.
SB= 135 MVA
Side Side
2
525kV/121kV/
27.6 kV
135/180/225 MVA
j0.1
Y
Y
Δ
Taps
ULTC@ HV
±10 %, 33 steps
Updated Single Line Diagram
Below is an updated single line diagram of the Adelaide Wind Energy Centre, reflecting the changes
identified in this Addendum.
2
CAA ID 2011-446
2nd Addendum Report – December 12, 2012
System Impact Assessment Report
Updated Single Line Diagram
Figure 1: Updated Adelaide Wind Energy Centre Single Line Diagram
-
2nd Addendum Report – December 12, 2012
End of Document -
CAA ID 2011-446
3