IEEE PES T&D Conference & Exposition 2022 - 81

resulted in the units riding through the events and continuing
to inject.
The Phase 2 implementation of the pilot on Central Hudson's
system assured the performance of M-SSSC devices
and validated improvements vital for the success of the
Hurley Avenue project. Utilities have also leveraged these
improvements in projects installed across North America,
South America, Australia, and Europe. Most notably, the
early 2021 installation of five M-SSSC deployments on
National Grid's United Kingdom transmission system across
a vital transfer interface that optimized flows across the
interface to increase transfer capability of 1.5 GW, primarily
to enable more wind generation. Figure 7 shows one of these
installations in the United Kingdom.
Section 4: Hurley Ave Project
Execution and Beyond
The previously discussed SEL real-time digital simulator
tests indicated that when the devices operated in capacitive
injection mode, a few cases observed a minimal overreach
by the line distance relays. All of these cases were within
the adjustable reach range of the existing relays. In inductive
injection mode, there was no impact on protection devices
or settings observed. As indicated, no relay changes are
needed. The only protection changes required are settings
changes to the reach of the line relays.
The M-SSSC devices will be installed in the same location
and interconnect at the same point as the initially proposed
FSC bank. The design and layout expand upon the
existing Hurley Avenue 345 kV substation with two new
bays: one for the M-SSSC deployment and the other as a
maintenance bypass. With the bypass feature of the M-SSSC
devices, a maintenance bypass bay was not required. However,
to reduce the length of line outages necessary to perform
future maintenance of the M-SSSC devices, Central
Hudson elected to install one.
The incoming section of the Leeds-Hurley line will be
routed to the new bypass bay to accommodate the installation.
This reroute requires construction of a new transmission
line access road. The layout of the new substation
bay was carefully analyzed and designed to provide the most
effective solution while integrating the ability to expand the
deployment in the future. The engineering team was able to
produce a layout that meets the current project needs and
allows for an expansion in the future that would increase the
compensation to 51%. This expansion would require minimal
design and construction resources. Additionally, it could
be completed at an accelerated pace. Compared to the layout
and space requirements of an FSC bank, the design developed
for the M-SSSC deployment required 70% less footprint. The
support structure and layout will be similar to that of the units
installed on National Grid's system, shown in Figure 7, with
slight modifications due to site-specific requirements.
With the design work completed, groundbreaking on
the site work occurred in September 2021. Site work construction
will continue through 2022. Central Hudson is
advancing the project forward and coordinating the numerous
substation workforces in a safe, efficient, and effective
manner that will allow the project to meet the targeted inservice
date.
Conclusions
Central Hudson recognized the benefits of implementing
GETs to resolve current grid needs and meet future renewables
goals. It took an active approach to validate M-SSSC
as reliable solutions to solve critical grid constraints. Central
Hudson's feedback and learnings from this process have
been incorporated in the completion of projects globally, far
expanding the value of its efforts.
The impact of the Hurley Avenue project will be immediate
as the project serves as an enormous step forward in
achieving New York's renewable integration goals. This project
will achieve approximately 185 MW of increased transfer
capacity when placed into service in Q4 2022. The planned
capacity for additional M-SSSC devices enables the potential
expansion of this project's impact and value. As renewable
generation grows, including hydro imports from Canada, the
deployment at Hurley Avenue can scale, increasing transfer
capacity and allowing a more renewable generation to reach
the downstate load centers.
New York's CLCPA is an aggressive piece of legislation
aimed at increasing the integration of renewables in
the state. Utilities throughout the state have recognized
the extent of this plan's ambition and have identified power
flow control as a solution to address constraints associated
with Phase 1 and Phase 2 projects. M-SSSC solutions
enable utilities to lower project costs and shorten project
lead times, key requirements of reaching 70% renewable
electricity by 2030 and 85% reduction in greenhouse gas
emissions by 2050.
figure 7. M-SSSC installation on National Grid's system in
the United Kingdom.
April 2022 Show Issue
For Further Reading
The Brattle Group; Pterra Consulting; New York Department
of Public Service Staff; NYSERDA Staff, " Initial
ieee power & energy magazine
81

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