IEEE Power & Energy Magazine - November/December 2020 - 63

System operators have rapidly been developing
and implementing new procedures to secure
a stable power supply.

Commercial Load

STATCOM

(Smart Inverter)
Utility-Scale PVs

: Reactive Power
: Ordinary Flow

SVR

: Reverse Flow

Substation
Telecommunication
Link

Voltage
Management
Server

Utility-Scale
PVs

Storage
(Including EVs)

SVC
Small-Scale PVs

figure 26. A next-generation distribution system. (Source: Kyushu EPCO; used with permission.)

supply. Areas of innovation include renewable generation
forecasting, renewable generation management, demand and
supply operations, distribution operations, online PV control, and staff training. Although the issue was not described
much in this article, under the progressing deregulation of
the business structure of the power industry, the penetration
of renewable generation is also causing many institutional
challenges, including frequent ¥0 prices in the wholesale
market. The increasing penetration levels of renewable generation also bring new issues regarding the reduced operation of synchronous machines and exacerbate the problems
related to supply adequacy. We need to make every effort
to realize a stable, affordable, sustainable, and safe future
energy system through efficient planning, investment, and
operation by enhancing technologies and institutions.

Acknowledgments
The authors are grateful to METI for the provision of materials about relevant government council meetings, figures, and
other information.

For Further Reading
K. Ogimoto, K. Ohbayashi, and K. Asano, "Progress and future of Japan's PV deployment," in Proc. Solar Integration
Workshop, No. 272, 2016.
Ministry of Economy, Trade and Industry (METI),
"Long-term energy supply and demand outlook," Tokyo,
2015. [Online]. Available: http://www.meti.go.jp/english/
press/2015/0716_01.html
november/december 2020

METI, "The second interim report of the subcommittee on Massive Integration of RE and Next-Generation
Electric Power Network," (in Japanese), Tokyo, 2019. [Online]. Available: https://www.meti.go.jp/shingikai/enecho/
denryoku_gas/saisei_kano/20190128_report.html
METI, "23th Working Group on Grid Connection of Renewable Energy: Improvements of RE curtailment process,"
(in Japanese), Tokyo, 2019. [Online]. Available: https://www
.meti.go.jp/shingikai/enecho/shoene_shinene/shin_energy/
keito_wg/pdf/023_07_00.pdf
Y. Iwafune, K. Ogimoto, and H. Azuma, "Integration of
EV into the electric power system based on results of road
trac census, energies-12-01849," Energies, vol. 12, no. 10,
pp. 1-21, 2019. [Online]. Available: https://econpapers.repec
.org/article/gamjeners/
K. Ogimoto, J. Fonseca Jr., K. Kataoka, H. Azuma, and
A. Isonaga, "General flexibility model analysis for mass PV
deployment, solar integration," in Proc. 9th Solar and Storage Integration Workshop, Dublin, Ireland, 2019. [Online].
Available: https://solarintegrationworkshop.org/dublin2019/
program/

Biographies
Kazuhiko Ogimoto is with the University of Tokyo, Japan.
Hiroshi Wani is with Kyushu Electric Power Co., Inc.,
Fukuoka, Japan.

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https://www.meti.go.jp/shingikai/enecho/denryoku_gas/saisei_kano/20190128_report.html https://www.meti.go.jp/shingikai/enecho/denryoku_gas/saisei_kano/20190128_report.html https://www.meti.go.jp/shingikai/enecho/shoene_shinene/shin_energy/keito_wg/pdf/023_07_00.pdf https://www.meti.go.jp/shingikai/enecho/shoene_shinene/shin_energy/keito_wg/pdf/023_07_00.pdf https://www.meti.go.jp/shingikai/enecho/shoene_shinene/shin_energy/keito_wg/pdf/023_07_00.pdf https://econpapers.repec.org/article/gamjeners/ https://econpapers.repec.org/article/gamjeners/ https://solarintegrationworkshop.org/dublin2019/program/ https://solarintegrationworkshop.org/dublin2019/program/ https://www.meti.go.jp/english/press/2015/0716_01.html https://www.meti.go.jp/english/press/2015/0716_01.html

IEEE Power & Energy Magazine - November/December 2020

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