IEEE Power & Energy Magazine - November/December 2014 - 74

Transmission
System Network

765 kV
345 kV
154 kV
dc 190-kV Submarine Cable
765-kV Substation
345-kV Substation

Power Quality Compliance Performance

154-kV Substation

Division

Compliance Criteria

Voltage

Reference
Voltage ±4 kV
60±0.1 Hz

Power Plant

Frequency

2008

(Unit: %)
2009

2010

99.98 99.99 99.99
99.92 99.94 99.96

figure 24. The current South Korean transmission system (source: Korea Power Exchange).

prevented the realization of a more stable and less expensive energy supply.
After the Japanese nuclear accident at Fukushima, the Japan
Renewable Energy Foundation put forward a proposal to interconnect Japan, South Korea, China, Mongolia, and Russia using
HVdc transmission lines. This proposal aims to replace nuclear
capacity with the accelerated development of renewable energy
sources, reducing the cost of renewable energies, and providing
greater energy security to Japan. The proposed interconnection
of strategic countries in northeastern Asia with electricity generation areas in the Gobi Desert has been dubbed the Asia "supergrid" (ASG) or the Northeast Asia (NEA) Interconnection.
74

ieee power & energy magazine

Such a supergrid involves technical and political challenges
because of the extent of the large geographical area. The size
of the system would result in greater diversity of both supply
and demand, which could provide both reliability and economic
benefits. The success of the ASG or NEA program in Asia, however, depends entirely on political conditions rather than just the
monetary investment and benefit analysis. Figure 25 shows the
proposed ASG scenario.

Electricity Market Operation in South Korea
The Korean electricity market operating procedure takes into
account power generation costs, forecasts of electric power
november/december 2014



Table of Contents for the Digital Edition of IEEE Power & Energy Magazine - November/December 2014

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IEEE Power & Energy Magazine - November/December 2014 - Cover3
IEEE Power & Energy Magazine - November/December 2014 - Cover4
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