FREAパンフレット（英語）

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←←←←↑→→↑←←←←←←←←←Challenges to the mass introduction of distributed energy resources (DER) Generation cost of DER (¥/kWh)Generation cost of DER (¥/kWh)Amount of introduced DER (GW)Amount of introduced DER (GW)Cost reduction by technological improvements and mass productionConcerns over increasedexternal costs to smooth the output variabilityCosts of DERsCosts of DERsMeasures for smoothing the naturally fluctuating outputReinforcement of power transmission and distribution cablesReduced rate of operation at power plantsIntroduction of an energy storage systemIncreased control of the renewable energy outputFuture measuresIntroducing smarter system equipment and energy management systems (EMS)Suppressing the costs of measures to stabilize the naturally fluctuating output Grid parityCosts borne for measures against fluctuations6Solutions for widespread use of renewable energy and cost-eective grid stabilization technologyResearch OutlineResearch TargetThe team has been developing a renewable energy network to reasonably and eectively introduce renewable energy into the mature legacy power grid system. This will reduce the consumption of nite energy resources (fossil fuels, etc.) and reduce CO2 emissions. We focus on advanced control and grid support technology for a smart inverter (PCS). This research topic aims to develop integration technology for both stabilizing and maximizing multiple DERs, especially PV and wind, by using energy-storage systems (ESS) such as hydrogen and batteries in the case of naturally uctuating electricity conditions due to the metrological environment. The team proposes a new energy supply system based on a renewable energy network with renewables and DERs. It will be built by combining utility-scale PV generation and ESS including the hydrogen system. This approach will create a new energy supply model from the perspective of electricity users, through exible demonstration facilities and our test platform.●Realization of smart distributed energy resources (DERs) through the use of advanced power equipment such as the smart inverter or PCS.●Optimization of system integration through the use of information communications technologies (ICTs) and meteorological data.●Hydrogen production from renewable energy and development of related technology.The team is developing a performance test method for elemental technologies such as DER, ESS, and users’ equipment in addition to a technology for the integrated use of renewal energy in combination with ESS and heat utilization technologies in order to realize a renewable energy network.This will improve the power supply value and the economic value of renewable energy and promote various introduction plans such as 100% renewable energy use.The team is mainly working on the following research and development topics:●Comprehensive evaluation of a PV generation system: predicting the annual amount of power generation of various types of PV modules, conducting PV inverter performance tests and eld failure diagnosis of a utility-scale PV system, etc.●Hydrogen production and storage technology using renewable energy: Technology for direct electrolysis from a PV system (solid polymer-type water electrolyzer with a fuel-battery function), hydrogen storage using metal hydrides, compression, hydrogen separation membranes, solar heat utilization and heat storage technologies, etc.●Grid support and smart technology for DER: We provide a smart test platform for energy management systems (EMS) as a user facility and keep developing performance verication test procedures and updating environments.●International standardization: We seek prompt international standardization of the above development results through cooperation with international research institutes, etc.In order to provide stable energy in the case of widespread use of variable renewable energy resources, it is essential to adjust the simultaneous balance of power supply and demand by using existing power plants and energy storage systems. A suitable combination of renewable energy resources for each location is also important, because distributed energy resources (DERs) are highly dependent on local meteorological conditions.Energy Network Team‒ Research and Verication of Advanced Integra-tion of Renewable Distributed Energy Resources ‒H2 Distributed power sources Energy Resources(DER)UtilityEnergy demandEnergy storage (storage batteries and hydrogen)Thermal utilizationTechnological items handled by the Energy Network TeamSmartSmart