NEDO
Field demonstration of system to alleviate power grid congestion begins – Verifying the feasibility of alleviating congestion at distribution substations by utilizing distributed energy resources towards carbon neutrality in 2050 –
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NEDO is organized by TEPCO Power Grid, Inc. as the managing company, Waseda University Educational Corporation, Mitsubishi Research Institute, Inc., Kansai Electric Power Transmission and Distribution Co., Ltd., Kyocera Corporation, and the Institute of Industrial Science, the University of Tokyo (The University of Tokyo). , Chubu Electric Power Power Grid, Inc., TEPCO Energy Partner, Inc., Tokyo Electric Power Company Holdings, Inc., and Mitsubishi Heavy
Industries, Ltd. We are working on the “Energy Resource Control Technology Development (FLEX DER Project)” (hereinafter referred to as the “Project”).
On May 1, this project began field demonstrations to confirm the feasibility of alleviating grid congestion using distributed energy resources such as storage batteries. In the field demonstration, we will construct a demonstration system in an actual power system and conduct technical verification to confirm the feasibility of alleviating congestion at distribution substations.
We will contribute to achieving carbon neutrality in 2050 by utilizing the results of this verification to the maximum extent possible with existing equipment and utilizing it in system development to expand the amount of renewable energy (hereinafter referred to as renewable energy) introduced.
1. background
In order to “make renewable energy the main power source” as indicated in the “Sixth Energy Basic Plan,” there is a need for technological development necessary to make maximum use of existing power systems while simultaneously reinforcing power systems. One of these is a technology that controls the output of distributed energy resources*1 (hereinafter referred to as DER) and alleviates congestion in power grids*2.
This project*3 targets transformers at distribution substations where congestion occurs due to renewable energy generation, and connects aggregators*4 and general power transmission and distribution companies in the supply area to connect DER power We are developing technology to build a DER flexibility system*5 that alleviates congestion by controlling demand patterns (demand shifting, etc.). 2. Overview of field demonstration
(1) Overview
In this project, in order to confirm the feasibility of alleviating grid congestion using the DER flexibility system through field demonstration, the study items will be “Study of issues for general power transmission and distribution operators” (WG1) and “Issues for DER flexibility utilization platform”. The results are divided into four categories: “Consideration” (WG2), “Consideration of issues for aggregators” (WG3), and “Field demonstration” (WG4).
For this field demonstration in Nasu-Shiobara City, Tochigi
Prefecture, each item ( In addition to collaborating with other working groups to extract verification items, set use cases, and create scenario proposals, we will also work on field demonstration environments such as the introduction of DER (installation of grid storage battery systems*6, etc.) and the installation of various measuring instruments. Construction has proceeded in parallel. Now that we have completed preparations for the field demonstration, we have started the field demonstration from May 1st. We verified a demonstration DER flexibility system based on multiple use cases, assuming that a large amount of interconnected solar power generation would cause congestion at distribution substation transformers. Masu.
[Image 1: https://prtimes.jp/i/135644/41/resize/d135644-41-a28d7b74a5587c8827d9-0.png&s3=135644-41-ca19340ff3de50447c0b12571b3ea002-959×482.png ]
Figure 1 Image of field demonstration
(2) Demonstration period
We plan to conduct demonstrations at multiple times during fiscal 2024, with the first one starting on May 1st and scheduled to end on May 14th, 2024.
(3) Demonstration location
We will select a power distribution substation in Nasushiobara City, Tochigi Prefecture, where there are concerns about congestion in the future due to the expansion of renewable energy, mainly solar power generation, and conduct field demonstrations in the selected area. 3. Future plans
Based on the verification results of this field demonstration, NEDO and this consortium*7 will compile the required specifications for the DER flexibility system and establish standard business flows and communication specifications. This will create a system that can make maximum use of DER and contribute to the further spread of renewable energy in Japan.
[Note]
*1 Distributed energy resources
A general term for demand equipment such as power generation equipment, power storage equipment, electric vehicles, and heat pumps. Also known as DER, which stands for Distributed Energy Resources. *2 Alleviation of power system congestion
When a large amount of renewable energy is introduced, a large amount of electricity generated by renewable energy is sent to the power system, which increases the power flow on the power system’s transmission and distribution lines and reduces the amount of power that can be transmitted and distributed. It’s called congestion. On the other hand, the recovery of the amount of power that can be transmitted and distributed through efforts to alleviate this congestion (such as increasing the power consumption of the load and absorbing the power generated by renewable energy) is called congestion alleviation.
*3 This project
Project name: Development of distributed energy resource control technology to alleviate power system congestion (FLEX DER project) Business period: FY2022-FY2024
Business overview: https://www.nedo.go.jp/activities/ZZJP_100237.html *4 Aggregator
A business that provides energy services by integrated control of DER etc. *5 DER flexibility system
DER flexibility is the ability to flexibly change the amount of generated power and load power consumption. In this project, we are proceeding with the development of the DER flexibility system, which is defined as a system consisting of the three systems/platforms shown in Figure 2. “DSO” in the diagram is an abbreviation for “Distribution System Operator” and refers to a distribution system operator that is a general power transmission and distribution company.
[Image 2: https://prtimes.jp/i/135644/41/resize/d135644-41-8953fcdbca6c519f334e-1.png&s3=135644-41-953b0354cd4fd3aaea9ec670446be37d-901×515.png] Figure 2 Image of DER flexibility system
*6 Installation of grid storage battery system
A grid storage battery system has been installed as one of the DERs used for field demonstrations, and operation has begun.
Installation location: Sekiya district, Nasu-Shiobara city
Equipment area: 528 square meters
Equipment capacity: Lithium ion battery (output: 1,999kW/nominal power capacity: 6,310kWh)
[Image 3: https://prtimes.jp/i/135644/41/resize/d135644-41-6d1adcd799a3c394424a-2.jpg&s3=135644-41-7e4974b7292aaab23e89e210ab843f8e-1272×660.jpg] Figure 3: Appearance of equipment
*7 This consortium
Refers to the 10 parties: TEPCO Power Grid, Waseda University, Mitsubishi Research Institute, Kansai Electric Power Transmission and Distribution, Kyocera, the University of Tokyo, Chubu Electric Power Power Grid, TEPCO Energy Partner, TEPCO Holdings, and Mitsubishi Heavy Industries. The issues are categorized into the four items (WGs) shown in Figure 4, and each WG collaborates to conduct discussions.
[Image 4: https://prtimes.jp/i/135644/41/resize/d135644-41-568a8f3559123817a4c2-3.png&s3=135644-41-c5b34628cb6ea240f90cac0dbdf7b23d-979×425.png ]
Figure 4 Roles of each person in this consortium
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