GB/T 34120-2023 in English

《GB/T 34120-2023电化学储能系统储能变流器技术要求》由TC550（全国电力储能标准化技术委员会）归口，主管部门为中国电力企业联合会。

Foreword

ChinaStandards.net is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.

This document is developed in accordance with the rules given in GB/T 1.1-2020 Directives for standardization - Part 1: Rules for the structure and drafting of standardizing documents.

This document replaces GB/T 34120-2017 Technical requirements for power conversion system of electrochemical energy storage system. In addition to structural adjustments and editorial changes, the following main technical changes have been made with respect to GB/T 34120 - 2017:

——The scope of use of the document has been changed, and the upper limit of "output AC voltage" has been determined to be 35 kV (see Clause 1 hereof; and Clause 1 of Edition 2017);

——Terms such as "AC terminal", "DC terminal", "fault ride through", "low voltage ride through", "high voltage ride through", "primary frequency control", "inertia response", and "touch current" have been added, and duplicate terms with DL/T 2528 have been removed (see Clause 3 hereof; and Clause 3 of Edition 2017);

——Product classifications such as "connection relationship with power grid", "access voltage level", "installation and use environment", "cooling mode" and "topology structure" and "product code” have been added (see Clause 4);

——The "electrical conditions for grid connected operation" have been changed and the "off grid operation conditions" have been added (see 5.2 and 5.3 hereof; and 5.1 of Edition 2017);

——"Appearance and protection level" has been added (see Clause 6);

——Functional requirements such as "start-up and shutdown", "alarm and protection", "insulation resistance detection", "operation information monitoring", "statistics", and "data display and storage" have been added (see 7.1, 7.4, 7.5, 7.7, 7.8, and 7.9);

——Electrical performance requirements such as "power output range", "primary frequency control", "inertia response", "high voltage ride through", "continuous fault ride through", "operational adaptability", and "equipment availability" have been added (see 8.1.1.1, 8.1.1.3, 8.1.1.4, 8.1.8.1.8.1.2, 8.1.8.4, 8.1.9, and 8.1.14);

——The "electrical safety distance" and "insulation requirements" have been changed, and safety performance requirements such as "equipotential connection and protective grounding", "capacitor residual energy hazard protection", and "mechanical protection" have been added (see 8.2.1.1, 8.2.1.2, 8.2.1.3, 8.2.1.4, 8.2.4 hereof; and 5.7 and 5.8 of Edition 2017);

——The requirements for "low temperature adaptability", "high temperature adaptability", and "wet heat adaptability" have been changed, and the requirements for "salt spray adaptability" have been added (see 8.2.3.1 ~ 8.2.3.4 hereof; and 5.4.20 of Edition 2017);

——The requirements for "electromagnetic compatibility" have been changed, and corresponding requirements have been proposed for different access voltage levels (see Clause 9 hereof; and 5.8 of Edition 2017);

——The "auxiliary system" has been added (see Clause 10);

——The "inspection rules" requirements have been changed, and the test items have been adjusted according to product classification and new technical requirements (see Clause 11 hereof; and Clause 6 of Edition 2017).

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 document was proposed by China Electricity Council.

This document is under the jurisdiction of the National Technical Committee on Electric Energy Storage of Standardization Administration of China (SAC/TC 550).

The previous editions of this document are as follows:

——this document was firstly issued in 2017 with a serial number of GB/T 34120-2017;

——This edition is the first revision.
Technical requirements for power conversion system of electrochemical energy storage system

1 Scope

This document specifies the functional requirements for power conversion system (hereinafter referred to as "power conversion system") used in electrochemical energy storage systems, including start-up and shutdown, power control, parallel and off grid switching, alarm and protection, insulation resistance detection, communication, operation information monitoring, statistics, data display and storage, electrical performance and safety performance, as well as classification and coding, normal working conditions, appearance and protection level, electromagnetic compatibility, and auxiliary systems, inspection rules, marking, packaging, transportation, and storage requirements.

This document is applicable to the design, manufacturing, test, testing, operation, maintenance and overhaul of power conversion system of energy storage systems with electrochemical cells as energy storage carriers and AC terminal voltages of 35 kV or less.

2 Normative references

The following documents contain requirements which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

GB/T 191 Packaging - Pictorial marking for handling of goods
GB/T 4208 Degrees of protection provided by enclosure (IP code)
GB/T 4798.2 Classification of environmental conditions - Classification of groups of environmental parameters and their severities - Part 2: Transportation and handling
GB/T 12325 Power quality - Deviation of supply voltage
GB/T 12326 Power quality - Voltage fluctuation and flicker
GB/T 13384 General specifications for packing of mechanical and electrical product
GB/T 14549 Quality of electric energy supply - Harmonics in public supply network
GB/T 15543 Power quality - Three-phase voltage unbalance
GB/T 15945 Power quality - Frequency deviation for power system
GB/T 17626.2 Electromagnetic compatibility (EMC) - Testing and measurement techniques - Electrostatic discharge immunity test
GB/T 17626.3 Electromagnetic compatibility - Testing and measurement techniques - Radiated, radio-frequency, electromagnetic field immunity test
GB/T 17626.4 Electromagnetic compatibility - Testing and measurement techniques - Electrical fast transient/burst immunity test
GB/T 17626.5 Electromagnetic compatibility - Testing and measurement techniques - Surge immunity test
GB/T 17626.6 Electromagnetic compatibility - Testing and measurement techniques - Immunity to conducted disturbances, induced by radio-frequency fields
GB/T 17626.8 Electromagnetic compatibility - Testing and measurement techniques - Power frequency magnetic field immunity test
GB/T 17799.2 Electromagnetic compatibility - Generic standards - Part 2: Immunity standard for industrial environments
GB/T 20626.1 Specific environmental condition - Electric and electronic products for plateau - Part 1: General technical requirements
GB/T 24337 Power quality - Interharmonics in public supply network
GB/T 34133 Testing code for power conversion system of energy storage system
GB/T 860 (All parts) Communication networks and system for power utility automation
DL/T 2528 Fundamental vocabulary for electrical 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
AC terminal
terminal in power conversion system used to connect power frequency AC power grid or AC load

3.2
DC terminal
terminal in power conversion system used to connect the DC bus of a battery cluster, battery array or stack

4 Classification and coding

4.1 Product classification

4.1.1 Classification by connection relationship with the power grid

——Grid-connected/disconnected switching power conversion system;

——Grid-connected power conversion system;

——Grid-disconnected power conversion system.

Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Classification and coding
5 Normal working conditions
6 Appearance and degree of protection
7 Basic functions
8 Property indexes
9 Electromagnetic compatibility
10 Auxiliary system
11 Inspection rules
12 Marking, packaging, transportation and storage
Annex A (Informative) Typical topology of power conversion system
Annex B (Normative) Equipment symbol
Annex C (Normative) Clearances and creepage distances
Bibliography