1 Scope
This standard specifies the principles and technical requirements for interconnecting the energy storage system, in which the electric energy is stored in electrochemical form, with the distribution network.
This standard is applicable to the electrochemical energy storage system interconnecting with the distribution network whose voltage class is 10(20)kV or below; as for other types of energy storage systems interconnecting with the distribution network as well as those in the microgrid, the provisions of this standard may also be referred to.
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 14598.9 Measuring Relays and Protection Equipment - Part 22-3: Electrical Disturbance Tests - Radiated Electromagnetic Field Immunity
GB/T 14598.10 Measuring Relays and Protection Equipment - Part 22-4: Electrical Disturbance Tests - Electrical Fast Transient/Burst Immunity Test
GB/T 14598.13 Electrical Relays - Part 22-1: Electrical Disturbance Tests for Measuring Relays and Protection Equipment - 1 MHz Burst Immunity Tests
GB/T 14598.14 Measuring Relays and Protection Equipment - Part 22-2: Electrical Disturbance Tests - Electrostatic Discharge Tests
GB/T 15543 Power Quality - Three-phase Voltage Unbalance
GB/T 19862 General Requirements for Monitoring Equipment of Power Quality
GB/T 24337 Power Quality - Interharmonics in Public Supply Network
GB 50057 Design Code for Protection of Structures Against Lightning
GB/T 50065 Code for Design of AC Electrical Installations Eathing
DL/T 448 Technical Administrative Code of Electric Energy Metering Unit
DL/T 584 Code for Setting of 3kV~110kV Relaying Protection Equipment
DL/T 620 Overvoltage Protection and Insulation Coordination for AC Electrical Installations
DL/T 634.5-101 Telecontrol Equipment and Systems - Part 5-101: Transmission Protocols - Companion Standard for Basic Telecontrol Tasks
DL/T 634.5-104 Telecontrol Equipment and Systems - Part 5-104: Transmission Protocols - Network Access for IEC 60870-5-101 Using Standard Transport Profiles
DL/T 645 Multi-function Watt-hour Meter Communication Protocol
JB/T 3950 Automatic Accurate Synchronizers
3 Terms and Definitions
For the purpose of this document, the following terms and definitions apply.
3.1
electrochemical energy storage system
an equipment system which can carry out electric energy storage, conversion and releasing cyclically and controllably in an electrochemical way
3.2
converter
an electrical equipment which is used to convert the voltage, frequency, phase, phase number of the power system as well as other characteristics of the capacity
3.3
point of interconnection
for energy storage systems equipped with booster station, the point of interconnection is the bus or node on the high-voltage side of the booster station; for energy storage systems without booster station, it is the aggregation point of electric energy output
3.4
interconnection interface
an integration of individual equipment or several equipment, including the interconnected parts between converter and distribution network as well as system access and control, relay protection and automatic safety device, automated communication device, measuring device, etc. The schematic diagram for the interconnection interface of electrochemical energy storage system and distribution network is as shown in Figure 1
Foreword i
1 Scope
2 Normative References
3 Terms and Definitions
4 Basic Requirements
5 Power Quality
6 Power Control and Voltage Regulation
7 Abnormal Response of Power Grid
8 Switchover of Interconnection/ Disconnection and Charge/ Discharge
9 Automatic Protection and Safety Devices
10 Communication and Automatization
11 Electric Energy Measurement
12 Earthing and Safety Signs
13 Interconnection Testing
