1 Scope
This standard specifies the test conditions, content, equipment, methods and steps, etc. of a network energy storage system using an electrochemical secondary battery as an electrical energy storage carrier.
This standard is applicable to the energy storage systems with a rated power of 100kW and above and a rated power discharge time of 15min and above, interconnecting with distribution network at the voltage grade of 35kV and below. It may apply to other types of energy storage systems by reference.
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 (including any amendments) applies.
GB 2894 Safety signs and guideline for the use
GB/T 12326 Power quality - Voltage fluctuation and flicker
GB/T 12706.1 Power cables with extruded insulation and their accessories for rated voltages from 1kV (Um=1.2kV) up to 35kV (Um=40.5kV) - Part 1: Cables for rated voltage of 1kV (Um=1.2kV) and 3kV (Um=3.6kV)
GB/T 12706.2 Power cables with extruded insulation and their accessories for rated voltages from 1kV (Um=1.2kV) up to 35kV (Um=40.5kV) - Part 2: Cables for rated voltages from 6kV (Um=7.2kV) up to 30kV (Um=36kV)
GB/T 14549 Quality of electric energy supply - Harmonics in public supply network
GB/T 15543 Power quality - Three-phase voltage unbalance
GB 50057 Design code for protection of structures against lightning
GB 50150 Standard for hand-over test of electric equipment electric equipment installation engineering
DL/T 448 Technical administrative code of electric energy metering
DL/T 620 Overvoltage protection and insulation coordination for AC electrical installations
DL/T 621 Grounding for AC electrical installations
DL/T995 Testing regulations on protection and stability control equipment
NB/T 33015 Technical guideline for electrochemical energy storage system interconnecting with distribution network
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
simulated electric power equipment
an adjustable AC power supply unit that simulates the amplitude, frequency and phase of the network (i.e. power grid) voltage
3.2
interconnection system
assemble including the interconnection of the converter and the power grid, as well as multiple devices such as energy storage system interconnection, energy storage system control, protection, assistance and other equipment, which is shown in Figure 1
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 General
5 Test conditions
6 Technical requirements for test equipment
7 Test item and method
8 Test report
Annex A (Informative) Test report
