PDF GB/T 36547-2024 English (GB/T 36547-2018: Older version)
Search result: GB/T 36547-2024 (GB/T 36547-2018 Older version)
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Name of Chinese Standard | Status |
| GB/T 36547-2024 | English | 320 |
Add to Cart
|
0-9 seconds. Auto-delivery.
|
Technical requirements for connecting electrochemical energy storage station to power grid
| Valid |
| GB/T 36547-2018 | English | 225 |
Add to Cart
|
0-9 seconds. Auto-delivery.
|
Technical rule for electrochemical energy storage system connected to power grid
| Obsolete |
PDF Preview: GB/T 36547-2024 PDF Preview: GB/T 36547-2018
GB/T 36547-2024: PDF in English (GBT 36547-2024) GB/T 36547-2024
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 27.180
CCS F 19
Replacing GB/T 36547-2018
Technical Requirements for Connecting Electrochemical
Energy Storage Station to Power Grid
ISSUED ON. MAY 28, 2024
IMPLEMENTED ON. DECEMBER 1, 2024
Issued by. State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword... 3
1 Scope... 6
2 Normative References... 6
3 Terms and Definitions... 7
4 Overall Requirements... 8
5 Power Control... 9
6 Primary Frequency Control... 10
7 Inertia Response... 11
8 Fault Ride-through... 12
9 Operation Adaptability... 18
10 Power Quality... 19
11 Relay Protection and Automatic Safety Devices... 20
12 Dispatching Automation and Communication... 21
13 Simulation Models... 22
14 Test and Evaluation of Connection to the Power Grid... 22
Bibliography... 24
Technical Requirements for Connecting Electrochemical
Energy Storage Station to Power Grid
1 Scope
This document stipulates the overall requirements for connecting electrochemical energy
storage stations to the power grid, as well as the technical requirements for power control,
primary frequency control, inertia response, fault ride-through, operation adaptability, power
quality, relay protection and automatic safety devices, dispatching automation and
communication, simulation models, and test and evaluation of connection to the power grid.
This document is applicable to the construction, connection, commissioning, test, inspection,
operation, maintenance and overhaul of newly constructed, renovated and expanded
electrochemical energy storage stations connected to the public power grid through voltage
levels of 10 (6) kV and above.
2 Normative References
The contents of the following documents constitute indispensable clauses of this document
through the normative references in the text. In terms of references with a specified date, only
versions with a specified date are applicable to this document. In terms of references without a
specified date, the latest version (including all the modifications) is applicable to this document.
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 22239 Information Security Technology - Baseline for Classified Protection of
Cybersecurity
GB/T 24337 Power Quality - Interharmonics in Public Supply Network
GB/T 26399 Technical Guide for Electric Power System Security and Stability Control
time required for the actual output active power change of the electrochemical energy storage
station to reach 90% of the difference between the target value and the initial value of active
power.
[source. GB/T 40595-2021, 3.11, modified]
3.4 settling time of PFC
From when the power system frequency exceeds the primary frequency control dead zone, the
shortest time that the absolute value of the difference between the actual output active power
and the target value of active power of the electrochemical energy storage station never exceeds
the allowable deviation.
[source. GB/T 40595-2021, 3.12, modified]
3.5 inertia response
When the power system frequency rapidly changes, the control function of the electrochemical
energy storage station to regulate the active power in response to the power system frequency
change rate.
[source. DL/T 2246.7-2021, 3.1, modified]
4 Overall Requirements
4.1 The electrochemical energy storage station shall have the capability of participating in peak
regulation, frequency control and voltage regulation, etc. of the power system, and its safe and
stable operation shall comply with the provisions of GB 38755 and GB/T 31464.
4.2 The electrochemical energy storage station shall have four-quadrant power control function
and the capability of receiving and executing control instructions issued by the power grid
dispatching institution.
4.3 The voltage level of the electrochemical energy storage station’s connection to the power
grid shall be determined after comprehensive technical and economic comparison based on
conditions, such as. the installed capacity of the energy storage station and the grid structure,
etc.
4.4 The network security protection of the electrochemical energy storage station shall comply
with the provisions of GB/T 36572.
4.5 The grounding mode of the electrochemical energy storage station shall be compatible with
the grounding mode of the power grid, to which, it is connected. Lightning protection and
grounding shall comply with the technical regulations of GB 14050, GB 50057 and GB/T 50065.
4.6 The electrochemical energy storage station connected to the power grid shall establish
electromagnetic transient, electromechanical transient and medium and long-term dynamic
simulation models in accordance with the requirements of GB/T 42716.
4.7 The electrochemical energy storage station shall have a clarified electric energy
measurement point. The electric energy measurement point shall be located at the grid
connection point, equipped with a two-way electric energy measurement device, and have the
function of remote transmission of electric energy measurement information. The technical
requirements shall comply with the provisions of GB/T 50063 and DL/T 448.
4.8 The charge energy and discharge energy of the electrochemical energy storage station shall
not be lower than the rated charge energy and rated discharge energy.
4.9 Before the electrochemical energy storage station is connected to the power grid for
operation, the performance test of connection to the power grid shall be tested. The test method
shall comply with the method specified in GB/T 36548.
5 Power Control
5.1 Active Power Control
5.1.1 The electrochemical energy storage station shall have the capability of controlling active
power and shall be able to accept local and remote active power control instructions to achieve
continuous regulation of active power.
5.1.2 When the electrochemical energy storage station responds to local active power control
instructions, the charge / discharge response time shall not be greater than 500 ms, the charge /
discharge regulation time shall not be greater than 2 seconds, the charge-to-discharge transition
time, and the discharge-to-charge transition time shall not be greater than 500 ms, and the active
power control deviation shall not exceed 1% of the rated power.
5.1.3 The electrochemical energy storage station shall be able to respond to automatic
generation control (AGC) instructions, and the regulation rate and control accuracy shall satisfy
the requirements of the power grid dispatching institution.
5.1.4 The electrochemical energy storage station shall have the capability of emergency power
support and shall reach the maximum dischargeable or rechargeable power within 200 ms.
5.2 Reactive Power Control
5.2.1 The electrochemical energy storage station shall have the capabilities of reactive power
regulation and voltage control and shall be able to accept local and remote control instructions
to achieve continuous regulation of reactive power / voltage.
5.2.2 The electrochemical energy storage station shall have the control modes for power factor,
reactive power and voltage control, and have the function of online switching control modes.
5.2.3 The power factor of the grid connection point of the electrochemical energy storage station
shall be continuously adjustable within the range of 0.9 (lead) ~ 0.9 (lag).
electrochemical energy storage station shall increase the active power for discharging or reduce
the active power for charging in accordance with the primary frequency control curve.
6.5 When the power system frequency rises and exceeds the frequency control dead zone, the
electrochemical energy storage station shall reduce the active power for discharging or increase
the active power for charging in accordance with the primary frequency control curve.
6.6 The primary frequency control power change amplitude of the electrochemical energy
storage station should not be limited. If necessary, the amplitude limit shall not be less than 20%
of the rated power.
6.7 The error adjustment rate of primary frequency control of the electrochemical energy
storage station shall be 0.5% ~ 3%.
6.8 The delay time of PFC shall not be greater than 1 second, the rise time of PFC shall not be
greater than 3 seconds, and the settling time of PFC shall not be greater than 4 seconds. When
reaching stability, the active power control deviation shall not exceed 1% of the rated power.
7 Inertia Response
7.1 The electrochemical energy storage station shall have the function of inertia response, which
can be turned on or off through local or remote control in accordance with the demands of the
power system.
7.2 The electrochemical energy storage station shall upload the turn-on-off signals and action
status signals of inertia response to the power grid dispatching institution.
7.3 The frequency change dead zone of inertia response of the electrochemical energy storage
station should be determined in accordance with the actual situation of the power system, and
should be set to (0.03 ~ 0.05) Hz. The time window for calculating frequency changes should
be 100 ms ~ 200 ms. When the frequency change of the power system is greater than the dead
zone range, the electrochemical energy storage station shall provide the capability of inertia
response under the condition of satisfying Formula (2), and in accordance with the frequency
change rate, change the active power output.
Where,
f---the frequency deviation of the grid connection point of the electrochemical energy storage
station, expressed in (Hz);
f---the frequency of the grid connection point of the electrochemical energy storage station,
expressed in (Hz);
t---time, expressed in (s).
7.4 During inertia response, the active power change of the electrochemical energy storage
station shall satisfy the requirements of Formula (3).
Where,
PI---the active power change of the electrochemical energy storage station, expressed in (kW)
or (MW);
TJ---the equivalent inertia time constant of the electrochemical energy storage station, expressed
in (s), which should be set to 4 s ~ 14 s;
fN---the rated frequency of the power system, expressed in (Hz);
PN---the rated active power of the electrochemical energy storage station, expressed in (kW) or
(MW).
7.5 The inertia response time of the electrochemical energy storage station shall not be greater
than 1 second, and the control deviation of active power shall not exceed 1% of the rated
power.
8 Fault Ride-through
8.1 Low-voltage Ride-through
8.1.1 When the voltage at the grid connection point drops, the electrochemical energy storage
station shall have the capability of low-voltage ride-through. Within the shaded range shown in
Figure 1, it shall continuously operate without being disconnected from the power grid. See the
specific requirements below.
a) When the voltage at the grid connection point of the electrochemical energy storage
station drops to zero, it shall continuously operate for no less than 150 ms without
being disconnected from the power grid.
b) When the voltage at the grid connection point of the electrochemical energy storage
station drops to 20% of the nominal voltage, it shall continuously operate for no less
than 625 ms without being disconnected from the power grid.
c) When the voltage at the grid connection point of the electrochemical energy storage
station drops to 90% of the nominal voltage, it shall continuously operate for no less
than 2 s without being disconnected from the power grid.
d) When the voltage at the grid connection point of the electrochemical energy storage
station drops within the shaded range and the area above the voltage contour in Figure
1, the electrochemical energy storage station shall continuously operate without being
K1---the dynamic reactive current proportional coefficient of the electrochemical
energy storage station;
Ut---the voltage per-unit value at the grid connection point of the electrochemical
energy storage station;
IN---the rated current of the AC side of the electrochemical energy storage station,
expressed in (A).
b) The dynamic reactive current proportional coefficient K1 of the electrochemical
energy storage station can be determined in accordance with the actual situation of
the power system, and the value range should be 1.5 ~ 3.
c) During the voltage drop at the grid connection point, the maximum output capacity
of reactive current of the electrochemical energy storage station shall not be less than
1.05 times the rated current IN of the AC side of the energy storage station.
d) From the moment when the voltage at the grid connection point drops, the response
time of dynamic reactive current of the electrochemical energy storage station shall
not be greater than 30 ms. From the moment when the voltage at the grid connection
point returns to above 90% of the nominal voltage, the electrochemical energy storage
station shall exit the dynamic reactive current increment within 30 ms.
8.1.3 When a three-phase asymmetric short-circuit fault occurs in the power system, causing
the voltage at the grid connection point of the electrochemical energy storage station to drop,
the electrochemical energy storage station shall have the capability of dynamic reactive support.
See the specific requirements below.
a) When the positive-sequence component of the voltage at the grid connection point of
the electrochemical energy storage station is 60% ~ 90% of the nominal voltage, the
positive-sequence reactive current injected by the electrochemical energy storage
station into the power grid shall be the sum of the positive-sequence reactive current
output value I0+ during normal operation before the voltage drop and the dynamic
positive-sequence reactive current increment It+. The negative-sequence reactive
current absorbed from the power grid shall be the difference between the negative-
sequence reactive current output value I0 during normal operation before the voltage
drop and the dynamic negative-sequence reactive current increment It. The dynamic
positive-sequence and negative-sequence reactive current increments shall respond to
the voltage changes at the grid connection point and satisfy the requirements of
Formula (5).
Where,
It+---the positive-sequence dynamic reactive current increment injected by the
electrochemical energy storage station, expressed in (A);
It---the negative-sequence dynamic reactive current increment absorbed by the
electrochemical energy storage station, expressed in (A);
K2+---the dynamic positive-sequence reactive current proportional coefficient of the
electrochemical energy storage station;
K2---the dynamic negative-sequence reactive current proportional coefficient of the
electrochemical energy storage station;
Ut+---the per-unit value of positive-sequence component of the voltage at the grid
connection point of the electrochemical energy storage station;
Ut---the per-unit value of negative-sequence component of the voltage at the grid
connection point of the electrochemical energy storage station;
IN---the rated current of the AC side of the electrochemical energy storage station,
expressed in (A).
b) The dynamic positive-sequence and negative-sequence reactive current proportional
coefficients K2+ and K2 can be determined in accordance with the actual situation of
the power system and should not be less than 1.0.
c) The response time of the positive-sequence and negative-sequence dynamic reactive
current of the electrochemical energy storage station shall not be greater than 30 ms.
d) During the voltage drop at the grid connection point, the maximum output capacity
of reactive current of the electrochemical energy storage station shall not be lower
than 1.05 times the rated current IN.
e) When the positive-sequence component of the voltage at the grid connection point is
less than 60% of the nominal voltage, the electrochemical energy storage station shall
inject appropriate positive-sequence dynamic reactive current into the power grid and
absorb appropriate negative-sequence dynamic reactive current from the power grid
without increasing the voltage unbalance at the grid connection point.
8.1.4 For electrochemical energy storage stations that are not disconnected from the power
system during voltage drops, after the fault is eliminated, they shall have the capability of
quickly recovering the active power, and the change rate of active power recovery should not
be less than 30% PN/s.
NOTE. PN is the rated active power of the electrochemical energy storage station, which is
expressed in (kW) or (MW).
8.2 High-voltage Ride-through
shall respond to the voltage change at the grid connection point and shall satisfy the
requirements of Formula (6).
Where,
It---the dynamic reactive current increment injected by the electrochemical energy
storage station, expressed in (A);
K3---the dynamic reactive current proportional coefficient of the electrochemical
energy storage station;
Ut---the voltage per-unit value at the grid connection point of the electrochemical
energy storage station;
IN---the rated current of the AC side of the electrochemical energy storage station,
expressed in (A).
b) The dynamic reactive current proportional coefficient K3 of the electrochemical
energy storage station can be determined in accordance with the actual situation of
the power system, and not be less than 1.5.
c) From the moment when the voltage at the grid connection point rises, the response
time of dynamic reactive current of the electrochemical energy storage station shall
not be greater than 30 ms. From the moment when the voltage at the grid connection
point returns to below 110% of the nominal voltage, the electrochemical energy
storage station shall exit the actively provided dynamic reactive current increment
within 30 ms.
8.2.3 For electrochemical energy storage stations that are not disconnected from the power
system during the voltage rise period and do not maintain the active power value before the
fault, after the fault is eliminated, they shall have the capability of quickly recovering the active
power, and the change rate of active power recovery should not be less than 30% PN/s.
8.3 Continuous Fault Ride-through
8.3.1 Continuous low-voltage ride-through
The electrochemical energy storage station shall have the capability of continuous low-voltage
ride-through. See the specific requirements below.
a) The electrochemical energy storage station shall have the capability of withstanding
at least two consecutive low-voltage ride-throughs;
b) The time interval between two adjacent low-voltage ride-throughs should be 0.2 s ~
2 s, which can be determined based on the fault reclosing action time of the outgoing
term flicker value caused by the grid connection point shall satisfy the provisions of GB/T
12326.
10.4 Voltage Unbalance
After the electrochemical energy storage station is connected, the voltage unbalance caused by
the grid connection point shall satisfy the provisions of GB/T 15543.
10.5 Monitoring and Management Requirements
The electrochemical energy storage station shall be equipped with power quality monitoring
devices that satisfy the requirements of GB/T 19862.When the power quality indicators of the
electrochemical energy storage station do not satisfy the requirements, power quality
management equipment shall be installed.
11 Relay Protection and Automatic Safety Devices
11.1 The design and configuration of relay protection, automatic safety devices and secondary
circuits of the electrochemical energy storage station shall satisfy the requirements of the power
network structure and main electrical wiring of energy storage stations, and shall comply with
relevant provisions on power systems and anti-accident measures.
11.2 The configuration of relay protection and automatic safety devices of the electrochemical
energy storage station shall be coordinated with the power grid-side protection and power grid-
side reclosing, comply with the provisions of GB/T 14285, and satisfy the requirements of
reliability, selectivity, sensitivity and quickness.
11.3 The grid connection point of the electrochemical energy storage station shall be equipped
with a grid connection point measurement and control protection device, which has the
protection functions of overcurrent, overload, zero-sequence overcurrent, overvoltage,
undervoltage, over-frequency and under-frequency, etc.
11.4 For electrochemical energy storage stations connected to the power grid through voltage
levels of 220 kV and above, the grid connection line shall be equipped with two sets of full-line
fast-acting main protection; the secondary circuits and communication channels shall satisfy
dual requirements. When fiber optic channel conditions are met, longitudinal current
differential protection should be used for the full-line fast-acting main protection.
11.5 The electrochemical energy storage station shall be equipped with anti-islanding protection.
When the electrochemical energy storage station operates in the grid-connected mode and
detects an unplanned island, the electrochemical energy storage station shall be disconnected
from the power grid within 2 seconds.
11.6 Electrochemical energy storage stations connected to the power grid through voltage levels
of 35 kV and above shall be equipped with fault recording equipment. The connected analog
quantities and switching quantities shall satisfy the requirements of the remote control and shall
have sufficient recording channels. The situation from 10 seconds before the fault to 60 seconds
after the fault shall be recorded, and the wave recording information shall be remotely
transmitted to the power grid dispatching institution.
11.7 The electrochemical energy storage station shall be equipped with automatic safety devices
in accordance with the provisions of GB 38755 and GB/T 26399 based on the safety and
stability calculation results of the connection scheme.
12 Dispatching Automation and Communication
12.1 The electrochemical energy storage station shall be equipped with dispatching automation
equipment, such as. computer monitoring systems, electric energy measurement systems,
secondary system safety protection equipment and data network access equipment, etc.
12.2 The telecontrol information collection range of the electrochemical energy storage station
dispatching automation system shall satisfy the requirements of the telecontrol information
access regulations of the dispatching automation energy management system of the power
system.
12.3 The transmission channel, transmission mode and information transmission content
between the electrochemical energy storage station and the power grid dispatching institution
shall comply with the relevant regulations of the power grid dispatching institution, including
providing telemetry signals, remote signaling signals, remote regulation signals, remote control
signals, relay protection and automatic safety device signals, as well as the modes of providing
signals and real-time requirements, etc.
12.4 The electrochemical energy storage station shall provide the following information to the
power grid dispatching institution.
a) Electrical analog quantities. frequency, voltage, current, active power, reactive power,
power factor and power quality, etc. of the grid connection point;
b) Electric energy and energy status. rechargeable / dischargeable capacity, charge
capacity, discharge capacity and power station energy status, etc.;
c) Status quantities. breaking equipment status, charging and discharging status, fault
information, telecontrol terminal status and communication status of the grid
connection point;
d) Other information. other information required by the grid connection dispatching
agreement.
12.5 The electrochemical energy storage station shall deploy network security protection
equipment and connect information to the power grid dispatching institution. The network
security protection shall satisfy the requirements of GB/T 22239, GB/T 36572 and security
protection provisions of the power monitoring system.
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
|