Interpretation of Group Standards by China Electrical Engineering Society: Hardware-in-the-loop Testing Specification for Grid-connected Performance of Energy Storage System Inverters

Interpretation of Group Standards by China Electrical Engineering Society: Hardware-in-the-loop Testing Specification for Grid-connected Performance of Energy Storage System Inverters

The group standard T/CES 251-2023 “Hardware-in-the-loop Testing Specification for Grid-connected Performance of Energy Storage System Inverters” proposed by the China Electrical Engineering Society was drafted and completed by the Electric Power Research Institute of State Grid Henan Electric Power Company and other units. This standard specifies the technical requirements for the preparation of hardware-in-the-loop testing, testing platforms, testing items and result determination, and testing reports for electrochemical energy storage system inverters.
1. Drafting Units and Main Authors
（1）Drafting Units
The Electric Power Research Institute of State Grid Henan Electric Power Company, the Electric Power Research Institute of State Grid Shaanxi Electric Power Company, Chongqing University, the Electric Power Research Institute of State Grid Liaoning Electric Power Company, Southern Power Grid Electric Technology Co., Ltd., State Grid Comprehensive Energy Service Group Co., Ltd., the Electric Power Research Institute of Guangxi Power Grid Co., Ltd., the Electric Power Research Institute of State Grid Ningxia Electric Power Co., Ltd., the Electric Power Research Institute of State Grid Anhui Electric Power Company, Xi’an Singularity Energy Co., Ltd., Beijing Haibo Sichuang Technology Co., Ltd., the Electric Power Research Institute of State Grid Jibei Electric Power Co., Ltd., State Grid Shanghai Comprehensive Energy Service Co., Ltd., China Electrical Engineering Society, North Industrial University, Xiamen Kehua Data Technology Co., Ltd., Suzhou Inovance Technology Co., Ltd., TBEA Xinjiang New Energy Co., Ltd., State Grid Times (Fujian) Energy Storage Development Co., Ltd., Beijing Yingbo Electric Co., Ltd., the Electric Power Research Institute of State Grid Gansu Electric Power Company, the Electric Power Research Institute of Hainan Power Grid Co., Ltd., State Grid Shanghai Electric Power Company, Zhejiang Haide New Energy Co., Ltd., and Lanzhou Hengzhou Electric Power Testing Co., Ltd.
（2）Main Authors
Teng Weijun, Liu Yang, Wang Hua, Li Zhaohui, Deng Jun, Du Xiong, Sun Guangyu, Guo Jingmei, Li Jianlin, Zhou Xichao, Sun Zhiyuan, Xue Fei, Xu Bin, Liu Yatao, Zhou Yuhao, Li Dongping, Ge Yangyang, Zhang Xiaotong, Song Yi, Zhang Yafei, Wang Nan, Sun Yi, Wang Lingling, Liu Mosi, Li Jinzhong, Deng Xiaoyang, Xie Yuguang, Xie Boyu, Ma Wei, Chen Zhe, Li Zhen, Feng Jianyun, Lin Zhenhuang, Tao Yong, Zhou Hongwei, Dou Zhenlan, Zhao Jin, Wei Daixue, Liu Wenfei, Zhang Xujun, Sun Xin, Cheng Bing, Zhang Chunyan, Zhang Wei, Xue Caixia, Zheng Xiangyu.
2. Background of Standard Development
（1）Energy storage systems have outstanding advantages such as fast response speed, bidirectional energy flow, and flexible application, making them an effective way to solve the consumption of renewable energy, enhance grid flexibility, and improve grid utilization efficiency, playing a crucial role in the new power system dominated by renewable energy.
（2）The scale of energy storage operation in China is increasing year by year, and the grid-connected performance of energy storage systems, including low and high voltage ride-through and grid adaptability, seriously affects the safe operation of energy storage, necessitating verification of grid-connected performance.
（3）Verification of the grid-connected performance of energy storage systems includes both on-site tests and type tests. On-site tests are challenging, have limited operating conditions, and can yield less data information, with high costs and time requirements; type tests may have inconsistencies between the controller software version and the on-site operation.
（4）Hardware-in-the-loop testing excels over on-site and type tests in simulating grid connection conditions and controller software versions, making it suitable for verifying and modeling the grid-connected performance of energy storage inverters. However, there is currently no relevant standard for hardware-in-the-loop testing of energy storage inverters, making the establishment of this group standard necessary and urgent.
3. Main Content of the Standard
（1）Scope
This standard specifies the technical requirements for the preparation of hardware-in-the-loop testing, testing platforms, testing items and result determination, and testing reports for electrochemical energy storage system inverters. This standard is applicable to the verification of grid-connected performance and model parameter identification data testing for electrochemical energy storage system inverters.
（2）Normative References
The main normative references of this standard include:
  • GB/T 34120 Technical Specification for Energy Storage Inverters of Electrochemical Energy Storage Systems
  • GB/T 36547 Technical Regulations for Grid Connection of Electrochemical Energy Storage Systems
  • GB/T 36548 Testing Specification for Grid Connection of Electrochemical Energy Storage Systems
  • GB/T 40581 Specification for Safety and Stability Calculation of Power Systems
  • GB 38755 Guidelines for Safety and Stability of Power Systems
（3）Terms and Definitions
Mainly includes the definitions of real-time digital simulators, real-time signal interfaces, and hardware-in-the-loop testing systems for energy storage inverters.
（4）General Requirements
Mainly includes the general requirements for simulation environment, pre-testing preparation, testing items and result determination, simulation model requirements, controller requirements, and testing condition settings for hardware-in-the-loop testing of grid-connected performance of energy storage system inverters.
（5）Testing Conditions
Mainly includes testing environmental conditions, testing data requirements, and conditions for the samples to be tested.
（6）Testing Platform
Mainly includes the functional requirements of real-time digital simulators and testing platform requirements.
（7）Testing Items and Result Determination
The testing items mainly include fault ride-through and grid adaptability. Fault ride-through includes low voltage fault ride-through and high voltage fault ride-through, while grid adaptability includes voltage adaptability and frequency adaptability. The result determination refers to the standard requirements that the testing results of the testing items need to meet.
（8）Testing Includes
Mainly includes: manufacturer, model, structure, and parameters of the energy storage inverter; testing time, testing unit, testing personnel; calibration results of testing platform equipment; testing conditions; testing content; hardware-in-the-loop simulation testing waveforms, data analysis results; hardware-in-the-loop simulation testing conclusions.
4. Benefits of Standard Development
This standard has broad applicability. It specifies the overall requirements for hardware-in-the-loop testing of grid-connected performance of energy storage systems, testing preparations, testing items and steps, and testing reports, providing a basis and reference for hardware-in-the-loop testing and model parameter testing of grid-connected performance of energy storage systems.
After the release and implementation of this standard, it will provide technical support for the safe operation of energy storage systems. Under the guidance of the “dual carbon” goal and the new power system dominated by renewable energy, the gradual increase in installed capacity of renewable energy and energy storage makes this project have broad market application prospects, which is more conducive to enhancing China’s voice in the stable operation and management experience of the power system internationally.
For standard purchases, please contact the China Electrical Engineering Society 010-63256793
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Interpretation of Group Standards by China Electrical Engineering Society: Hardware-in-the-loop Testing Specification for Grid-connected Performance of Energy Storage System Inverters
Interpretation of Group Standards by China Electrical Engineering Society: Hardware-in-the-loop Testing Specification for Grid-connected Performance of Energy Storage System Inverters
Interpretation of Group Standards by China Electrical Engineering Society: Hardware-in-the-loop Testing Specification for Grid-connected Performance of Energy Storage System Inverters

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Interpretation of Group Standards by China Electrical Engineering Society: Hardware-in-the-loop Testing Specification for Grid-connected Performance of Energy Storage System Inverters
Interpretation of Group Standards by China Electrical Engineering Society: Hardware-in-the-loop Testing Specification for Grid-connected Performance of Energy Storage System Inverters
Interpretation of Group Standards by China Electrical Engineering Society: Hardware-in-the-loop Testing Specification for Grid-connected Performance of Energy Storage System Inverters

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Interpretation of Group Standards by China Electrical Engineering Society: Hardware-in-the-loop Testing Specification for Grid-connected Performance of Energy Storage System Inverters
Interpretation of Group Standards by China Electrical Engineering Society: Hardware-in-the-loop Testing Specification for Grid-connected Performance of Energy Storage System Inverters
Interpretation of Group Standards by China Electrical Engineering Society: Hardware-in-the-loop Testing Specification for Grid-connected Performance of Energy Storage System Inverters

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