IEEE Power & Energy Magazine - July/August 2019 - 32

costs and decreased system losses. This connection would
improve the voltage stability in the distribution system.
The G-platform can also be interconnected in parallel with
existing substations, especially when the existing substation
does not have any additional space for expansion.
The advantages of the G-platform are summarized
as follows:
✔ The installation is fast, simple, and flexible because
of the modular design and the capacity upgrade, and
installation location change is easy.

✔ At strategic locations, it is expected to face minimal

public opposition because of its compact design.
✔ Because of the ESS, it can act as a virtual power plant and
minimize the adverse effects of variations in generation
output from renewables. This means that a DER with a
G-platform can be used as a dispatchable generator.
✔ In the event of a failure of the existing substation, it can
be installed quickly to prevent a long outage period.
KEPCO is developing a standard specification for the
installation of the G-platform and the technologies for

table 4. Existing and planned HVdc and FACTS substations in the Republic of Korea (as of March 2019).
Type

Year

Capacity

Location

Status

HVdc

1998
2019
(refurbishment)

300 MW

Jeju HVdc No. 1

Under refurbishment

UPFC

2003

80 MVA

Kangjin Substation

In operation

STATCOM

2009

±100 MVar

Migum Substation

In operation

SVC

2010

±200 MVar

Dongseoul Substation

In operation

STATCOM

2010

±50 MVar

Sinjeju Substation

In operation

STATCOM

2010

±50 MVar

Halla Substation

In operation

SVC

2012

±200 MVar

Sinpaju Substation

In operation

HVdc

2014

400 MW

Jeju HVdc No. 2

In operation

STATCOM

2014

±100 MVar

Sinsungnam Substation

In operation

STATCOM

2017

±400 MVar

Sinyoungju Substation

In operation

STATCOM

2017

±400 MVar

Sinchungju Substation

In operation

STATCOM

2018

±200 MVar

Sinbupyung Substation

Under installation

SVC

2018

-225 ~ +675 MVar

Sinjaechun Substation

In operation

TCSC

2019

555 MVar × 2

Sinyoungju Substation

Under installation

TCSC

2019

595 MVar × 2

Sinjaechun Substation

Under installation

STATCOM

2018

±300 MVar

Godeok Substation

Under installation

STATCOM

2019

±300 MVar

Singapyoung Substation

Under planning

STATCOM

2022

±300 MVar

Uijeongbu Substation

Under planning

STATCOM

2021

±300 MVar

Sinhanul Substation No. 1

Under planning

STATCOM

2022

±300 MVar

Sinhanul Substation No. 2

Under planning

HVdc

2019

1.5 GW

Bukdangjin-Godeok No. 1

Under installation

HVdc

2020

200 MW

Jeju HVdc No. 3

Under installation

HVdc

2021

1.5 GW

Bukdangjin-Godeok No. 2

Under installation

HVdc

2021

4 GW

Sinhanul-Singapyoung No. 1

Under planning

BTB

2021

200 MW

Yangju Substation

Under planning

HVdc

2022

4 GW

Sinhanul-Singapyoung No. 2

Under planning

HVdc

2023

2 GW

West Coast Offshore Wind Connection Under planning

TCSC: thyristor-controlled series capacitor; UPFC: unified power flow controller; SVC: static
VAR compensator
32

ieee power & energy magazine

july/august 2019



IEEE Power & Energy Magazine - July/August 2019

Table of Contents for the Digital Edition of IEEE Power & Energy Magazine - July/August 2019

Contents
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