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Broader Introduction of Renewable Energy Sources

Introduction of Renewable Energy

HEPCO is actively committed to expanding the adoption of renewable energies.
In FY2018, renewable energies accounted for 23%* of our electricity sold (kWh), which is on the same level as the 22 to 24% that had been set as the national goal for FY2031.

  1. * This figure includes electricity purchased by HEPCO through the Feed-In Tariff system.

[Composition of HEPCO's electricity (MWh)]

Composition of HEPCO's electricity (MWh)

  1. * Total amount of electricity generated by HEPCO's power generation and amount of electricity purchased from other companies (excluding remote islands)
  2. * "FIT electric power" refers to electricity purchased by HEPCO through the Feed-In Tariff(FIT) scheme.

The installed capacity (kW) of renewable energies in Hokkaido has risen considerably to 3,629,000 kW (as of the end of FY2018), which is approximately 1.7 times the amount five years ago.

[Interconnected renewable energy in Hokkaido (MW)]

Interconnected renewable energy in Hokkaido (MW)

  1. * The total capacity of renewable energy connected to HEPCO's grid(excluding isolated islands).
  2. * Comparison of current year against the year when the Feed-In Tariff system (FIT system) was introduced.

Initiatives Furthering Adoption of Renewable Energies

HEPCO has been advancing initiatives for hydroelectric power generation, biomass power generation and other renewable energies that are locally oriented, have little output fluctuation, and little impact on the electric power network.

We are proceeding to verify technologies for maintaining the quality of electric power generated through hydroelectric and photovoltaic systems, and will work to further expand the adoption of these technologies.

  • Developing and Increasing Output of Hydroelectric Power Stations

Of the renewable energies, hydroelectric power generation has the capability to generate electricity with less fluctuation than solar or wind power, and is a highly reliable source as hydroelectric power generation technology has been built up over many years.

HEPCO is moving forward to construct new small and medium-sized hydroelectric power stations (output: 30,000 kW and below) and rebuild aging facilities that make use of water resources which have not been previously utilized for power generation. When upgrading water turbines which are a key piece of equipment in existing power stations, we are seeking to replace these with higher efficiency models to increase maximum output (kW).

[Actual and Planned Development of Small and Medium-Sized Hydroelectric Power Stations] (As of August 31, 2018)

Power station Date placed into operation Output prior (kW) Output after (kW) Output increase (kW)
Shumarinai March 2013 - 1,120 -
Takinoue-Shibazakura* December 2013 112 260 148
Yukomanbetsu June 2014 - 710 -
Shin Iwamatsu January 2016 12,600 16,000 3,400
Kyogoku-Meisui-no-Sato* October 2016 - 410 -
Toya* June 2018 5,500 6,400 900
Sanru* February 2019 (Scheduled) - 1,100 -
Shintoku June 2022 (Scheduled) 20,000 23,100 3,100
  1. * Facility owned by HOKUDEN ECO-ENERGY, a HEPCO Group company.

[Actual and Planned Water Turbine Upgrades to Increase Output] (As of August 31, 2018)

Power station Date placed into operation Output prior (kW) Output after (kW) Output increase (kW)
Sounkyo February 2011 23,800 25,400 1,600
Hoheikyo June 2011 50,000 51,900 1,900
Makunbetsu February 2012 16,400 18,000 1,600
Hirafu July 2012 11,000 12,000 1,000
Tomura March 2015 40,000 41,300 1,300
Shunbetsu March 2016 27,000 28,500 1,500
Shizunai September 2017 46,000 46,700 700
Higashi-no-Sawa April 2018 20,000 21,000 1,000
Kamiakubetsu* April 2021 (Scheduled) 4,150 4,650 500
Abuta* April 2023 (Scheduled) 19,500 20,790 1,290
  1. * Facility owned by HOKUDEN ECO-ENERGY, a HEPCO Group company.

[Actual Output Increases Verified by Performance Testing] (As of August 31, 2018)

Power station Date placed into operation Output prior (kW) Output after (kW) Output increase (kW)
Toyoura* March 2013 3,400 3,500 100
Aibetsu October 2015 5,500 5,600 100
Shibinai October 2015 1,300 1,600 300
Toyama January 2016 10,000 10,200 200
Iwachishi April 2016 13,500 14,300 800
Okusaru April 2018 15,000 15,800 800
  1. * Facility owned by HOKUDEN ECO-ENERGY, a HEPCO Group company.
  • Biomass Power Generation Project Participation and Research & Development

HEPCO is participating in a woody biomass power generation project, which utilizes leftover timber from forest thinning that has been procured in Hokkaido.

In addition, we have been conducting research and development on power generation using livestock biomass, which is closely linked to the livestock industry, a major sector of the Hokkaido economy.

Livestock-based Biomass Power Station in Shikaoi Town
Livestock-based Biomass Power Station in Shikaoi Town

  • Recruitment of wind power generation by installing Grid Side Storage Battery

We are recruiting new wind power generation on the premise that businesses jointly pay the cost of grid side storage batteries.

  Wind power generation recruitment volume Guide of storage battery capacity When to install storage batteries
Phase I +600MW About 90MW-4h FY 2023
Phase II +400MW About 60MW-4h Considering the introduction situation of Phase I
  • Large Power Storage System Demonstration Project

We set up a large-sized storage battery at our substation and conducted demonstration tests to verify the performance as a new coordination power for renewable energy output fluctuation and establish optimum control technology.

  • Rated output: 15,000 kW
  • Storage capacity: 60,000 kWh
  • Demonstration Test for Expansion of Introduction of Wind Power Generation

In cooperation with TEPCO Power Grid Inc., we will conduct a demonstration test utilizing the existing Kitahon HVDC Link and expand the introduction of 200MW of new wind power generation.

Demonstration Test for Expansion of Introduction of Wind Power Generation

  • Effective Utilization of Transmission Lines

We are trying to effectively utilize the unused capacity portion of the transmission line on the premise of suppressing the power generation output when the transmission capacity is exceeded.

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