Technical requirements for connecting user-side electrochemical energy storage system to distribution network
1 Scope
This document specifies the technical requirements of power control, fault ride through, operational adaptability, power quality, start-up and shutdown, relay protection, information and communication and power metering as well as test and assessment for connecting user-side electrochemical energy storage system to distribution network.
This document is applicable to the construction, connection, commissioning, test, detection and operation of the newly built, renovated and expanded electrochemical energy storage system connected to the distribution network of the user via a voltage level of 220V or above, and serves as a reference for the electrochemical energy storage system connected to the public network via a voltage level of 380V/220V.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions 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/T 12325 Power quality - Deviation of supply voltage
GB/T 12326 Power quality - Voltage fluctuation and flicker
GB/T 13955 Installation and operation of residual current operated protective devices
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 17215.321 Electricity metering equipment (AC) - Particular requirements - Part 21: Static meters for active energy (classes A, B, C, D and E)
GB/T 19862 General requirements for monitoring equipment of power quality
GB/T 22239 Information security technology - Baseline for classified protection of cybersecurity
GB/T 24337 Power quality - Interharmonics in public supply network
GB/T 33982 Technical specification for grid connection protection of distributed resources
GB/T 36547 Technical rule for electrochemical energy storage system connected to power grid
GB/T 36558 General technical requirements for electrochemical energy storage system in power system
GB/T 36572 Guidelines of cyber security protection for electric power system supervision and control
GB/T 39786 Information security technology - Baseline for information system cryptography application
GB 50057 Design code for protection of structures against lightning
GB/T 50063 Code for design of electrical measuring device of power system
GB/T 50065 Code for design of ac electrical installations earthing
DL/T 645 Multi-function watt-hour meter communication protocol
DL/T 698.45 Electric energy data acquire and management system - Part 4-5: Object oriented data exchange protocol
DL/T 2528 Basic terms of electric energy storage
3 Terms and definitions
For the purposes of this document, the terms and definitions given in DL/T 2528 and the following apply.
3.1
user-side electrochemical energy storage system
electrochemical energy storage system connected to power user distribution network
Note: The system generally includes electrochemical energy storage unit, electrical primary and secondary equipment, monitoring system and related auxiliary facilities, etc.
3.2
point of common coupling
connection where power users access the public supply network
3.3
point of connection
point of coupling between electrochemical energy storage system and user's internal distribution network
Note: For the energy storage system with step-up transformer, the point of connection refers to the bus or node on the high voltage side of the step-up transformer, and for that without step-up transformer, the point of connection refers to the output connection point of the energy storage system.
3.4
primary frequency control; PFC
control function in which the electrochemical energy storage system automatically adjusts active power in response to the frequency deviation of the power system when it deviates from the target frequency
[Source: GB/T 40595-2021, 3.1, modified]
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 General requirements
5 Power control
6 Fault ride through
7 Operational adaptability
8 Power quality
9 Start-up and shutdown
10 Relay protection
11 Information and communication
12 Power metering
13 Test and assessment for connecting user-side electrochemical energy storage system to distribution network
Bibliography
