GB/T 36547-2018 (GB/T 36547-2024 Newer Version) PDF English
GB/T 36547-2018 (GB/T36547-2018, GBT 36547-2018, GBT36547-2018)
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Technical requirements for connecting electrochemical energy storage station to power grid
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Technical rule for electrochemical energy storage system connected to power grid
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Newer version: GB/T 36547-2024 Standards related to (historical): GB/T 36547-2024
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GB/T 36547-2018: PDF in English (GBT 36547-2018) GB/T 36547-2018
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 27.180
F 19
Technical rule for electrochemical energy storage system
connected to power grid
ISSUED ON: JULY 13, 2018
IMPLEMENTED ON: FEBRUARY 1, 2019
Issued by: State Administration for Market Regulation;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms and definitions ... 5
4 Basic regulations ... 9
5 Power quality ... 10
6 Power control ... 11
7 Power grid adaptability ... 12
8 Automatic protection and safety devices ... 14
9 Communication and automation ... 14
10 Energy metering ... 15
11 Grounding and safety signs ... 16
12 Test for connecting to power grids ... 16
Appendix A (Informative) Illustration of points of interconnection and points of
common coupling ... 18
Appendix B (Informative) Recommended voltage levels for electrochemical energy
storage systems to be connected to power grids ... 19
Technical rule for electrochemical energy storage system
connected to power grid
1 Scope
This standard specifies the technical requirements for power quality, power control,
power grid adaptability, automatic protection and safety devices, communication and
automation, power metering, grounding and safety identification, and grid connection
testing of electrochemical energy storage systems connected to a power grid.
This standard is applicable to electrochemical energy storage systems with a rated
power of 100 kW and above and an energy storage time of not less than 15 min. For
electrochemical energy storage systems with other power levels and energy storage time,
this standard can be implemented by reference.
2 Normative references
The following documents contain the provisions which, through normative reference in
this document, constitute the essential provisions of this document. For the dated
referenced documents, only the versions with the indicated dates are applicable to this
document; for the undated referenced documents, only the latest version (including all
the amendments) is applicable to this document.
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 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 Code for design 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
The following terms and definitions apply to this document.
3.1 electrochemical energy storage system
A system in which an electrochemical cell is used as the energy storage carrier, and the
cyclic electric energy storage and release is carried out through a power conversion
system.
Note: Generally, it includes a battery system, a power conversion system, related auxiliary facilities, etc.
For an electrochemical energy storage system connected to a voltage level of 10(6) kV and above, it
usually also includes a collection line, a step-up transformer, etc.
3.2 power conversion system
A device that connects a battery system with a power grid (and/or load) to realize
bidirectional power conversion.
3.3 point of interconnection
For an energy storage system with a step-up transformer, it refers to the busbar or node
on the high-voltage side of the step-up transformer. For an energy storage system
without a step-up transformer, it refers to the output aggregation point of the energy
storage system.
Note: See Appendix A for an illustration of the point of common coupling.
3.4 point of common coupling
The connection point where an energy storage system is connected to a utility grid.
4.5 The electrical equipment at the point of interconnection of an electrochemical
energy storage system shall meet the dielectric withstand voltage regulations for
electrical equipment of the corresponding voltage level.
4.6 The point of interconnection of an electrochemical energy storage system shall be
equipped with an interconnection disconnecting device that is easy to operate, can be
locked, and has obvious disconnection indications.
4.7 An electrochemical energy storage system participating in frequency regulation and
peak regulation of a power system shall comply with the relevant provisions of GB/T
31464.
4.8 The startup and shutdown time of an electrochemical energy storage system shall
meet the requirements of the power dispatching agreement (and/or users), and an
electrochemical energy storage system connected to a utility grid through a voltage
level of 10(6) kV and above shall be able to execute the startup and shutdown
commands from power system operators.
5 Power quality
5.1 Harmonics
5.1.1 The harmonic voltage of an electrochemical energy storage system connected to
the point of common coupling shall meet the requirements of GB/T 14549.
5.1.2 The inter-harmonic voltage of an electrochemical energy storage system
connected to the point of common coupling shall meet the requirements of GB/T 24337.
5.2 Voltage deviation
The voltage deviation of an electrochemical energy storage system connected to the
point of common coupling shall meet the requirements of GB/T 12325.
5.3 Voltage fluctuation and flicker
The voltage fluctuation and flicker value of an electrochemical energy storage system
connected to the point of common coupling shall meet the requirements of GB/T 12326.
5.4 Voltage unbalance
The voltage unbalance of an electrochemical energy storage system connected to the
point of common coupling shall meet the requirements of GB/T 15543.
5.5 DC component
The DC current component of an electrochemical energy storage system connected to
6.2 Active power control
6.2.1 An electrochemical energy storage system connected to a utility grid with a
voltage level of 10(6) kV and above shall have the functions of local and remote
charging and discharging power control, and shall have the function of automatically
executing the commands issued by power system operators.
6.2.2 An electrochemical energy storage system connected to a utility grid with a
voltage level of 110(220) kV and above shall have the ability to participate in primary
frequency regulation and have the function of automatic generation control (AGC).
6.2.3 For an electrochemical energy storage system connected to a utility grid with a
voltage level of 10(6) kV and above, the dynamic response characteristics shall meet
the following requirements:
a) The response time for charging/discharging of the power control of the energy
storage system is not more than 2 s, the regulation time for charging/discharging
is not more than 3 s, the transfer time from charging to discharging and the
transfer time from discharging to charging are not more than 2 s;
b) After the regulation time, the deviation between the actual output curve of the
system and the dispatching command or the planned curve is not more than ±2%
of the rated power.
6.3 Reactive power control
An electrochemical energy storage system connected to a utility grid through a voltage
level of 10(6) kV and above shall have both local and remote reactive power control
and voltage regulation functions.
7 Power grid adaptability
7.1 Frequency adaptability
An electrochemical energy storage system connected to a utility grid shall meet the
frequency operation requirements in Table 1.
9.4 The information provided by an electrochemical energy storage system, which is
connected to a utility grid with a voltage level of 10(6) kV and above and dispatched
by the power grid, to the power system operator includes but is not limited to the
following content:
a) Electrical analog quantity: frequency, voltage, injected grid current, injected
active power and reactive power, power factor, power quality data, etc. about the
point of interconnection;
b) Electric energy and state of charge: chargeable/dischargeable capacity, charging
capacity, discharging capacity, state of charge, etc.;
c) State quantity: state of disconnecting equipment, charging and discharging state,
fault information, remote terminal state, communication state, AGC state, etc.
about the point of interconnection;
d) Other information: other information required by the power dispatching
agreement.
10 Energy metering
10.1 Before an electrochemical energy storage system is connected to a power grid, the
electricity metering point shall be specified. The setting of electricity metering points
shall follow the following regulations:
a) The electrochemical energy storage system shall be connected to the utility grid
by a dedicated line, and the electricity metering point shall be set at the point of
common coupling;
b) The electrochemical energy storage system shall be connected to the public line
by a T connection, and the electricity metering point is set at the outlet side of the
electrochemical energy storage system;
c) If the electrochemical energy storage system is connected to the user’s internal
power grid, the electricity metering point shall be set at the point of
interconnection.
10.2 An electrochemical energy storage system shall be equipped with an electric
energy metering device, and the equipment configuration and technical requirements
shall meet the requirements of DL/T 448.
10.3 The electric energy metering device of an electrochemical energy storage system
shall have the functions of two-way active and reactive power metering, event recording,
local and remote communication, and its communication protocol shall comply with
the provisions of DL/T 645.
11 Grounding and safety signs
11.1 The lightning protection and grounding of an electrochemical energy storage
system shall meet the requirements of GB 14050, GB 50057, and GB/T 50065.
11.2 An electrochemical energy storage system shall have a prominent sign, and the
shape, color, size, and height of the sign shall meet the requirements of GB 2894.
12 Test for connecting to power grids
12.1 Basic requirements
12.1.1 Before being connected to a power grid, the main components of an
electrochemical energy storage system, such as the energy storage carrier and the power
conversion system, shall pass performance tests, and the tests shall be carried out by
organizations or departments with corresponding qualifications.
12.1.2 An electrochemical energy storage system connected to a voltage level of 10(6)
kV and above shall provide a grid connection test report issued by a qualified
organization to the power system operator or relevant management department within
6 months of grid connection operation.
12.1.3 The test point where an electrochemical energy storage system is connected to a
power grid shall be the point of interconnection or the point of common coupling of the
electrochemical energy storage system.
12.1.4 When the main components such as the energy storage carrier and the power
conversion system of an electrochemical energy storage system are changed, the
electrochemical energy storage system shall be retested for being connected to the
power grid.
12.2 Test content
The test for an electrochemical energy storage system being connected to a power grid
shall be carried out in accordance with GB/T 36548 or other relevant standards or
regulations, which shall include but not be limited to the following content:
a) Power quality test;
b) Power control test;
c) Power grid adaptability test;
d) Testing for automatic protection and safety devices;
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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