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Ensuring a More Competitive and Stable Power Supply, and Contribution to Environmental Conservation

The Paris Agreement took effect in November 2016, and there has been greater interest in taking action to abate global warming. HEPCO joined the Electric Power Council for a Low Carbon Society, and has been implementing initiatives to abate global warming that are best suited to the characteristics of Hokkaido, while at the same time recognizing that it is fundamental to pursue an optimum energy mix from the "S+3E" perspective, which aims to concurrently achieve energy security, economic efficiency, and environmental compatibility on the premise that safety is assured.
HEPCO strives to further utilize the abundant renewable energies of our region, and has been working on projects to demonstrate the feasibility of large energy storage systems in order to control fluctuations in output, an important issue that needs to be addressed in order to increase the adoption of renewable energies. Combining renewable energies with the use of energy generated by nuclear power on the principle that safety is assured will contribute to making the low-carbon society a reality.

Specific Initiatives

Power generation
Nuclear power
  • Initiatives for the early resumption and safe operation of Tomari Nuclear Power Station on the principle that safety is assured

Thermal power
  • Introduction of the Ishikariwan Shinko Thermal Power Station (LNG: 569.4 MW: 3 units)

    • Adoption of the best available technologies (BAT)
Hydroelectric power (renewable)
  • Installation of the Kyogoku Power Station (pure pumped-storage hydroelectric power facility: 200 MW: 3 units)

    • In addition to the role it fulfills in peak supply capacity, the Kyogoku Power Station expands the renewable energy network with its superior adjustable speed system for frequency control and load following to respond to fluctuating demand.
  • Take advantage of untapped energy in hydroelectric power generation facilities

    • Promote redevelopment of small and medium-sized hydropower in conjunction with replacement of superannuated hydro generators, and promote efforts to improve output at existing power stations with the installation of high-efficiency runners.
  • Demonstration of small-scale woody biomass power generation using hydrogen

  • Operation of the Mori Geothermal Power Station and Date Solar Photovoltaic Power Station

Power transmission and distribution
System interconnections HVDC
  • Expansion of the Hokkaido-Honshu (Kitahon) HVDC* Link

    • Contributes to the broader introduction of renewable energies and activating power transactions in Hokkaido, in addition to ensuring stable power supply in the Hokkaido area.
  • Demonstration of large-scale storage battery system

    • HEPCO aims to demonstrate performance and develop and establish optimal control technologies as a new way to adjust power with respect to output fluctuations for wind and photovoltaic power generation.
  • Broader adoption of renewable energies

    • Introduction of a forecasting system for renewable generation.
    • Demonstration project that makes use of the Kitahon HVDC link with the aim of increasing the adoption of wind power generation.
    • Utilization of network-side storage batteries.
  • Research and development on output control of livestock-based biomass power generation

Energy savings and CO2 reduction activities
  • Recommendations for equipment and systems based on energy conservation

    • HEPCO is engaged in energy-saving services from the customer's perspective, including recommendations to switch to smart electrical appliances and the provision of information on energy savings.

Ratio of renewable energy to total amount of electricity of our company

HEPCO is proactively working to expand the adoption of renewable energies.
Renewable energies accounted for 23%* of our total power production (kWh) in FY2018, which is on the level of 22~24% that is the standard set by the Japanese government for the nation to achieve by FY2031.

  1. * This figure includes electricity purchased by HEPCO through the Feed-in Tariff (FIT) scheme.

[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 FIT scheme.

Target set in the Electric Power Council for a Low Carbon Society's "Action Plan for Low-Carbon Society"

HEPCO will contribute to the reduction of greenhouse gas emissions through the promotion of the aforementioned initiatives aimed at achieving the goals set in the Electric Power Council for a Low Carbon Society's "Action Plan for Low-Carbon Society."

The aim is to achieve a CO2 emission intensity of 0.37 kg-CO2/kWh* (target value for the entire electric power business) by FY2031.

  1. * Figures indicate 1kWh of customer usage.

Change in HEPCO's CO2 Emission Intensity*1

  • Since the Great East Japan Earthquake, the amount of thermal power generation has significantly increased as the Tomari Nuclear Power Station was gradually shut down.
  • The Tomari Nuclear Power Station is currently undergoing reviews to verify compliance with the Japanese government's new regulatory requirements, and the entire HEPCO Group is making every effort to restart the power station based on the essential precondition that safety be assured.

Change in HEPCO's CO2 Emission Intensity

  1. *1: Value after CO2 credits and other adjustments.
  2. *2: This target is to be achieved by the entire electric power business.

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