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This standard is developed in accordance with the rules given in GB/T 1.1-2009.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. The issuing body of this document shall not be held responsible for identifying any or all such patent rights.
This standard was proposed by the China Electricity Council (CEC).
This standard is under the jurisdiction of National Technical Committee 550 on Electric Energy Storage of Standardization Administration of China (SAC/TC 550).
Technical rule for electrochemical energy storage system connected to power grid
Technical rule for electrochemical energy storage system connected to power grid
1 Scope
This standard specifies the technical requirements of the electrochemical energy storage system for connecting to the power grid, such as power quality, power control, power grid adaptability, protection and automatic safety devices, communication and automation, power metering, grounding and safety signs, and connecting test to power grid.
This standard is applicable to electrochemical energy storage systems with rated power of 100 kW and above and energy storage time of not less than 15 min, and it may also apply to electrochemical energy storage systems with other power levels and energy storage time.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB 2894 Safety signs and guideline for the use
GB/T 12325 Power quality - Deviation of supply voltage
GB/T 12326 Power quality - Voltage fluctuation and flicker
GB 14050 Types and safety technical requirements of system earthing
GB/T 14285 Technical code for relaying protection and security automatic equipment
GB/ T 14549 Quality of electric energy supply - Harmonics in public supply network
GB/T 15543 Power quality - Three-phase voltage unbalance
GB/T 19862 Power quality - General requirements for monitoring equipment of power quality
GB/T 24337 Power quality - Interharmonics in public supply network
GB/T 31464 The grid operation code
GB 50057 Design code for protection of structures against lightning
GB/T 50065 Code for design of AC electrical installations earthing
GB/T 36548 Test specification for electrochemical energy storage system connected to power grid
DL/T 448 Technical administrative code of electric energy metering
DL/T 584 Setting guide for 3 kV ~ 110 kV power system protection equipment
DL/T 645 Multi-function watt-hour meter communication protocol
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
electrochemical energy storage system
a system in which electrochemical cells are used as energy storage carriers and recyclable electric energy is stored and released through a power conversion system
Note: It generally includes battery system, power conversion system and related auxiliary facilities. For electrochemical energy storage systems connected to a voltage class of 10(6) kV and above, they usually include collecting lines, step-up transformers, etc.
3.2
power conversion system
a device that connects the battery system with the power grid (and/or load) to realize bidirectional conversion of power
3.3
point of interconnection
for an energy storage system with a step-up transformer, point of interconnection refers to the bus or node on the high voltage side of the step-up transformer. For an energy storage system without step-up transformer, point of interconnection refers to the output summary point of the energy storage system
Note: See Annex A for the illustration of point of common coupling.
3.4
point of common coupling
A point where energy storage system connects to the public power grid
Note: See Annex A for the illustration of point of common coupling.
3.5
hot standby state
a state when energy storage system is in condition to run, the equipment protection and automatic devices are in normal running state, and the energy exchange with the power grid can be realized by issuing control instructions to the energy storage system
3.6
response time for charging
the time for the energy storage system to change from the hot standby state to charging after it receives the control signal until the charging power reaches 90% of the rated power PN for the first time
See Figure 1.
Figure 1 Response time for charging
3.7
regulation time for charging
the time for the energy storage system to change from the hot standby state to charging after it receives the control signal until the charging power reaches the rated power PN and the power deviation starts to be controlled within ±2% of the rated power PN
See Figure 2.
Figure 2 Regulation time for charging
3.8
response time for discharging
the time for the energy storage system to change from the hot standby state to discharging after it receives the control signal until the discharging power reaches 90% of the rated power PN for the first time
See Figure 3.
Figure 3 Response time for discharging
3.9
regulation time for discharging
the time for the energy storage system to change from the hot standby state to discharging after it receives the control signal until the discharging power reaches the rated power PN and the power deviation starts to be controlled within ±2% of the rated power PN
Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Basic requirements 5 Power quality 6 Power control 7 Power grid adaptability 8 Protection and automatic safety device 9 Communication and automation 10 Electric energy metering 11 Grounding and safety signs 12 The power grid connecting test Annex A (Informative) Illustration of point of interconnection and point of common coupling Annex B (Informative) Recommended class of voltage for electrochemical energy storage system connected to power grid
ICS 27.180 F 19 中华人民共和国国家标准 GB/T 36547—2018 电化学储能系统接入电网技术规定 Technical rule for electrochemical energy storage system connected to power grid 2018—07—13发布 2019—02—01实施 国家市场监督管理总局 中国国家标准化管理委员会 发布 前言 本标准按照GB/T 1.1—2009给出的规则起草。 请注意本文件的某些内容可能涉及专利。本文件的发布机构不承担识别这些专利的责任。 本标准由中国电力企业联合会提出。 本标准由全国电力储能标准化技术委员会(SAC/TC 550)归口。 电化学储能系统接入电网技术规定 1 范围 本标准规定了电化学储能系统接入电网的电能质量、功率控制、电网适应性、保护与安全自动装置、通信与自动化、电能计量、接地与安全标识、接入电网测试等技术要求。 本标准适用于额定功率100kW及以上且储能时间不低于15 min的电化学储能系统，其他功率等级和储能时间的电化学储能系统可参照执行。 2规范性引用文件 下列文件对于本文件的应用是必不可少的。凡是注日期的引用文件，仅注日期的版本适用于本文件。凡是不注日期的引用文件，其最新版本(包括所有的修改单)适用于本文件。 GB 2894安全标志及其使用导则 GB/T 12325 电能质量 供电电压偏差 GB/T 12326 电能质量 电压波动和闪变 GB 14050 系统接地的型式及安全技术要求 GB/T 14285继电保护和安全自动装置技术规程 GB/T 14549 电能质量 公用电网谐波 GB/T 15543 电能质量 三相电压不平衡 GB/T 19862 电能质量 电能质量监测设备通用要求 GB/T 24337 电能质量 公用电网间谐波 GB/T 31464 电网运行准则 GB 50057建筑物防雷设计规范 GB/T 50065交流电气装置的接地设计规范 GB/T 36548 电化学储能系统接入电网测试规范 DL/T 448 电能计量装置技术管理规程 DL/T 584 3 kV～110 kV电网继电保护装置运行整定规程 DL/T 645 多功能电能表通信协议 3术语和定义 下列术语和定义适用于本文件。 3.1 电化学储能系统 electrochemical energy storage system 以电化学电池为储能载体，通过储能变流器进行可循环电能存储、释放的系统。 注：一般包含电池系统、储能变流器及相关辅助设施等。对于接入10(6)kV及以上电压等级的电化学储能系统，通常还包括汇集线路、升压变压器等。 3.2 储能变流器power conversion system 连接电池系统与电网(和/或负荷)，实现功率双向变换的装置。 3.3 并网点point of interconnection 对于有升压变压器的储能系统，指升压变压器高压侧母线或节点。对于无升压变压器的储能系统，指储能系统的输出汇总点。 注：公共连接点的图例说明参见附录A。 3.4 公共连接点point of common coupling 储能系统接入公用电网的连接处。 注：公共连接点的图例说明参见附录A。 3.5 热备用状态hot standby state 储能系统已具备运行条件，设备保护及自动装置处于正常运行状态，向储能系统下达控制指令即可与电网进行能量交换的状态。 3.6 充电响应时间 response time for charging 热备用状态下，储能系统自收到控制信号起，从热备用状态转成充电，直到充电功率首次达到额定功率PN的90％的时间。 见图1。
热备用状态 系统延时 时间 充电响应时间 功率 信号接收 图1 充电响应时间 3.7 充电调节时间 regulation time for charging 热备用状态下，储能系统自收到控制信号起.从热备用状态转成充电，直到充电功率达到额定功率PN且功率偏差始终控制在额定功率PN的±2％以内的起始时刻的时间。 见图2。
热备用状态 系统延时 时间 充电调节时间 功率 信号接收 图2 充电调节时间 3.8 放电响应时间 response time for discharging 热备用状态下，储能系统自收到控制信号起，从热备用状态转成放电，直到放电功率首次达到额定功率PN的90％的时间。 见图3。
热备用状态 系统延时 时间 放电响应时间 功率 信号接收 图3放电响应时间 3.9 放电调节时间 regulation time for discharging 热备用状态下，储能系统自收到控制信号起，从热备用状态转成放电，直到放电功率达到额定功率PN且功率偏差始终控制在额定功率PN的±2％以内的起始时刻的时间。 见图4。
热备用状态 系统延时 时间 放电调节时间 功率 信号接收 图4放电调节时间 3.10 充电到放电转换时间transfer time from charging to discharging 稳定运行状态下，储能系统从90％额定功率PN充电状态转换到90％额定功率PN放电状态的时间。 见图5。
功率 时间 充电到放电转换时间 图5充电到放电转换时间 3.11 放电到充电转换时间transfer time from discharging to charging 稳定运行状态下，储能系统从90％额定功率PN放电状态转换到90％额定功率PN充电状态的时间。 见图6。
