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2022.2.25 Notice

Results of a Demonstration Test on Frequency Control Technology Using Storage Batteries

February 25, 2022
Kansai Transmission and Distribution, Inc.
ELIIY Power Co., Ltd.
Sansha Electric Manufacturing Co., Ltd.
Sanyo Denki Co., Ltd.
SUMITOMO CORPORATION
Sumitomo Electric Industries, Ltd.
DAIHEN Corporation
NICHICON CORPORATION
JAPAN BENEX CORPORATION
Fuji Electric Co.,Ltd.
YAMABISHI Corporation.

Eleven companies including Kansai Transmission and Distribution, Inc. conducted a VPP*2 verification test from December 8 to 14, 2021, in which nine storage batteries*1 owned by consumers were collectively controlled to be immediately recharged and discharged in accordance with short-cycle load fluctuations in the power system, and the results were compiled today.

While the world is stepping up efforts to decarbonize, the Japanese government has issued a declaration of carbon neutrality for 2050, and it is expected that the introduction of renewable energy will continue to expand. The introduction of renewable energy is expected to increase in the future. In order to simultaneously achieve a stable supply of electricity and further expansion of the introduction of renewable energies, one of the issues is to secure the frequency adjustment power*3, and the technology to collectively control storage batteries is expected to be the solution.

By fiscal 2020, Kansai Transmission and Distribution, Inc. has been working on a test*5 to remotely control the storage batteries of multiple customers in units of seconds using K-LIBRA*4, a storage battery group monitoring and control system built with NEC Corporation for the collective control of storage batteries.
In addition to the GF-equivalent control*6 and LFC control*7 that have been confirmed to be capable of frequency control, EDC-H control*8 was newly verified this time.

As a result of the verification, it has been confirmed that each response satisfies the requirements*9 of the primary adjustment force, secondary adjustment force (1) and secondary adjustment force (2) of the supply-demand adjustment market under discussion at present.

The 11 companies, including Kansai Transmission and Distribution, Inc., will continue to work to establish technology for the practical application of frequency control technology using energy resources such as storage batteries, and contribute to the realization of a zero-carbon society through the safe and stable supply of electric power and the further expansion of the introduction of renewable energy.

*1 One home-use storage battery owned by ELIIY Power Co., Ltd.. Sansha Electric Manufacturing Co., Ltd, Sanyo Denki Co., Ltd. , Sumitomo Corporation, Sumitomo Electric Industries, Ltd, Daihen Corporation, Nichicon Corporation, Nippon Benex Co. 8 industrial-use storage batteries owned by YAMABISHI Corporation. (Fuji Electric Co., Ltd. will participate as a vendor of storage batteries owned by Sumitomo Corporation and JAPAN BENEX CORPORATION)

*2 Abbreviation for Virtual Power Plant.

*3 Electricity used by general transmission and distribution companies to adjust the frequency of the power system in order to keep it constant (50Hz/60Hz). It is important to maintain the frequency of the power system at a constant level because fluctuations in the frequency may cause problems with the quality of electricity and the use of industrial equipment. Currently, thermal and hydroelectric power generation mainly provide the frequency adjustment power.

*4 Abbreviation for Kansai transmission and distribution’s Liberty to manage the power grid Integrated Batteries and energy Resource Aggregator(s)

*5 May 22, 2019, March 25, 2020, March 22, 2021 Notified. (Japanese)

*6 A control system (abbreviation of “Governor Free”) in which the output is adjusted in accordance with changes in the grid frequency by means of a regulator (governor), which is a device that automatically adjusts the amount of steam and water used as power in order to keep the rotation speed of the generator, etc. constant. In this test, based on the grid frequency measured by the storage batteries, the storage batteries perform charge and discharge control equivalent to that of a generator.

*7 The output control of power sources, etc., in response to commands from the central power supply control center based on the detected grid frequency in response to load fluctuations (cycles of several to ten minutes) that make it difficult to predict demand (abbreviation of Load Frequency Control). In this test, the monitoring and control server receives the LFC signals from the central power supply command center [simulated] and sends the signals to each storage battery to control the charging and discharging of each battery.

*8 To control the output of power supplies, etc. within five minutes in response to commands from the central power supply command center based on demand forecasts in order to respond to relatively long load fluctuations (cycles of several tens of minutes to several hours) (abbreviation of Economic Load Dispatching Control). In this test, the monitoring and control server receives the EDC-H signal from the central power supply command center (simulated) and sends the signal to each storage battery to control the charging and discharging of each battery.

*9 The regulating power procured by general power transmission and distribution companies in the supply and demand adjustment market is divided into five product categories according to the speed of response time, etc. Primary regulating power, secondary regulating power (1) and secondary regulating power (2) refer to the product category with the fastest response time. The requirements referred to here are the assessment requirements presented by the 26th Supply and Demand Adjustment Market Review Subcommittee.

Attachment(Japanese): Results of the Demonstration Test on Frequency Control Technology Using Storage Batteries.

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