GB/T 42717-2023 PDF in English
GB/T 42717-2023 (GB/T42717-2023, GBT 42717-2023, GBT42717-2023)
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Evaluation method of grid-integration characteristics for electrochemical energy storage station
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Standards related to (historical): GB/T 42717-2023
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GB/T 42717-2023: PDF in English (GBT 42717-2023) GB/T 42717-2023
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 27.180
CCS F 19
Evaluation Method of Grid-integration Characteristics for
Electrochemical Energy Storage Station
ISSUED ON: MAY 23, 2023
IMPLEMENTED ON: DECEMBER 1, 2023
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 Terms and Definitions ... 5
4 Overall Requirements ... 5
5 Evaluation Items and Contents ... 6
5.1 Evaluation of Grid-integration Equipment ... 6
5.2 Evaluation of Functions and Basic Performance ... 7
5.3 Evaluation of Grid-integration Characteristics ... 7
6 Evaluation of Grid-integration Equipment ... 8
7 Evaluation of Functions and Basic Performance ... 9
7.1 Evaluation of Station Functions ... 9
7.2 Evaluation of Charging and Discharging Capacity ... 10
7.3 Evaluation of Energy Efficiency ... 10
7.4 Evaluation of Operating Status ... 10
8 Evaluation of Gird-integration Characteristics ... 11
8.1 Active Power Control ... 11
8.2 Reactive Power Control ... 12
8.3 Primary Frequency Modulation ... 13
8.4 Inertia Response ... 14
8.5 Grid Adaptability ... 14
8.6 Power Quality of Grid-integrated Operation ... 15
8.7 Grid-integrated and Off-grid Switching ... 15
9 Evaluation of Conclusions ... 16
Appendix A (informative) Procedures of Energy Storage Station Grid-integration
Characteristics Evaluation ... 17
Appendix B (informative) Information Collection Contents of Energy Storage Station
Grid-integration Characteristics Evaluation ... 19
B.1 Basic Information ... 19
B.2 Evaluation Information ... 19
Appendix C (informative) Report Framework of Energy Storage Station Grid-
integration Characteristics Evaluation ... 21
Bibliography ... 22
Evaluation Method of Grid-integration Characteristics for
Electrochemical Energy Storage Station
1 Scope
This document specifies the overall requirements for the evaluation of grid-integration
characteristics of electrochemical energy storage station (hereinafter referred to as “energy
storage station”), as well as the evaluation items and contents, and the technical requirements
for evaluation conclusions. It also describes the evaluation method for the performance of grid-
integration equipment, the functions and grid-integration characteristics of the energy storage
station.
This document is applicable to the operation, dispatch, management and evaluation of energy
storage stations connected to the power grid with a voltage level of 10 kV and above. Other
types of energy storage stations may refer to it for implementation.
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 12326 Power Quality - Voltage Fluctuation and Flicker
GB/T 14549 Quality of Electric Energy Supply - Harmonics in Public Supply Network
GB/T 15543 Power Quality - Three-phase Voltage Unbalance
GB/T 24337 Power Quality - Interharmonics in Public Supply Network
GB/T 36547 Technical Rule for Electrochemical Energy Storage System Connected to Power
Grid
GB/T 36548 Test Specification for Electrochemical Energy Storage System Connected to
Power Grid
GB/T 36549 Operation Performance Index and Evaluation of Electrochemical Energy Storage
Station
GB/T 40595 Guide for Technology and Test on Primary Frequency Control of Grid-connected
Power Resource
months of grid-integrated operation, and the evaluation period should be 12 months.
4.3 When the replacement of key equipment, such as: energy storage battery, battery
management system and energy storage converter, and the update or replacement of software
version affects the grid-integration characteristics of the energy storage station, an evaluation
shall be re-conducted within 6 months after the replacement or update is completed.
4.4 The evaluation of grid-integration characteristics of the energy storage station shall be
carried out through the steps of information and data collection, on-site inspection and testing,
data analysis and processing, etc., so as to form evaluation conclusions and complete evaluation
reports. The grid-integration characteristics evaluation procedures are shown in Appendix A.
4.5 The evaluation of grid-integration characteristics of the energy storage station shall be based
on the basic information and operating data of the power station. The basic information
collected is shown in Appendix B. In the absence of historical data of the items to be evaluated,
on-site testing can be adopted; the test method shall comply with the requirements of GB/T
36548. When the on-site testing involves the jurisdiction of power dispatching, a dispatching
permit shall be applied for.
4.6 The evaluation of grid-integration characteristics of the energy storage station shall be
conducted through the modes of information review, on-site verification and on-site testing,
including quantitative analysis and qualitative analysis.
4.7 The conclusions of the evaluation of grid-integration characteristics of the energy storage
station shall be judged based on compliance. For non-compliant items, improvement measures
or suggestions shall be provided.
5 Evaluation Items and Contents
5.1 Evaluation of Grid-integration Equipment
5.1.1 The evaluation of grid-integration equipment of the energy storage station includes
evaluation of the information completeness and compliance of grid-integration equipment, and
evaluation of the grid-integration equipment status.
5.1.2 For the evaluation of the information completeness of grid-integration equipment, the
information completeness of the key equipment, such as: energy storage battery, battery
management system and energy storage converter, etc., the information completeness of
auxiliary equipment, such as: relay protection and safety automatic device, firefighting system,
heating, ventilation and air conditioning system, and other primary and secondary equipment,
as well as the compliance of actual operating equipment information and submission to the
dispatching institution for filing shall be evaluated.
5.1.3 For the evaluation of the grid-integration equipment status, the effectiveness of the
equipment’s start-stop, switch and circuit breaker breaking functions, protection functions,
remote and local control functions, and functions of receiving and uploading dispatch
information shall be evaluated.
5.2 Evaluation of Functions and Basic Performance
5.2.1 The evaluation of functions and basic performance of the energy storage station includes
power station function evaluation, charging and discharging capacity evaluation, energy
efficiency evaluation and operating status evaluation.
5.2.2 For the evaluation of functions of the energy storage station, the actual functional
requirements for the energy storage station shall be evaluated.
5.2.3 For the evaluation of charging and discharging capacity, the indicators, such as: actual
chargeable and dischargeable power, actual chargeable and dischargeable energy and energy
retention rate of the energy storage station shall be evaluated.
5.2.4 For the evaluation of energy efficiency of the energy storage station, the indicators, such
as: comprehensive efficiency, energy storage loss rate and station power consumption rate of
the energy storage station shall be evaluated.
5.2.5 For the evaluation of equipment operating status, the indicators, such as: success rate of
power grid dispatching response, equivalent operating hours, unplanned outage factor and
availability factor of the energy storage station shall be evaluated.
5.3 Evaluation of Grid-integration Characteristics
5.3.1 The evaluation of grid-integration characteristics of the energy storage station includes
active power control evaluation, reactive power control evaluation, primary frequency
modulation capability evaluation, inertia response capability evaluation, grid adaptability
evaluation, grid-integrated operation power quality evaluation and grid-integrated and off-grid
switching capability evaluation.
5.3.2 The active power control evaluation shall include the following contents:
a) Steady-state control evaluation: evaluate the relative active power deviation between
the measured active power value at grid-integration point and the setting value of
power dispatch after the energy storage station completes active power adjustment;
b) Dynamic response characteristics evaluation: evaluate active power dynamic
response indicators, such as: response time, adjustment time, switching time and
power change rate, etc. during the execution of active power commands by the energy
storage station;
c) Automatic generation control (AGC) response characteristics evaluation: evaluate the
indicators, such as: adjustment rate and adjustment accuracy of the energy storage
station when participating in the AGC of the power system.
5.3.3 The reactive power control evaluation shall include the following contents:
dispatching institution;
b) Check on-site the information completeness of the installation, commissioning,
overhaul and operation tests of the grid-integrated key equipment of the energy
storage station;
c) Check on-site the compliance between the actual installation and operation of the
auxiliary facilities, relay protection and automatic safety devices of the energy storage
power station with the submitted information;
d) Check on-site the functions and commissioning status of equipment start-stop, switch
and circuit breaker breaking, emergency shutdown protection, remote and local
control of the energy storage station;
e) Check on-site the correctness of the dispatch information received and uploaded by
the energy storage station;
f) If the actual operation of the key equipment and auxiliary facilities of the energy
storage station is consistent with the equipment information, it shall be determined as
qualified; if one of them fails, then, it shall be determined as disqualified. If the energy
storage station equipment can normally start, stop or shut down, and normally alarm
and perform corresponding protective actions when an abnormality occurs, it shall be
determined as qualified; if one of them fails, then, it shall be determined as
disqualified.
7 Evaluation of Functions and Basic Performance
7.1 Evaluation of Station Functions
The evaluation of functions of the energy storage station is carried out in accordance with the
following method:
a) Check on-site the historical data of the energy storage station operating in accordance
with the designed functions during the evaluation period; mark one continuous
operation in accordance with the designed function as a functional event; select no
less than 3 functional events; record the start and end time of each functional event,
and the status of the energy storage station;
b) When there are no valid functional events in the historical data, carry out no less than
3 continuous functional cycle tests on site in accordance with the requirements of the
designed functions, and record the status of the energy storage station during each
functional event;
c) The actual functions of the energy storage station shall comply with the design
documents or relevant contract provisions, otherwise, the energy storage station shall
be determined as disqualified.
7.2 Evaluation of Charging and Discharging Capacity
The evaluation of charging and discharging capacity of the energy storage station is carried out
in accordance with the following method:
a) Check on-site the historical data of charging and discharging of the energy storage
station in accordance with the rated power during the evaluation period; mark the
continuous charging and discharging operation time in accordance with the rated
power not less than the nominal time as a charging and discharging event; select no
less than 3 charging and discharging events; record the maximum charging and
discharging power value and charging and discharging energy value of each charge
and discharge event in continuous operation;
b) When there are no valid charge and discharge events in the historical data, carry out
no less than 3 continuous charge and discharge cycle tests on-site at the maximum
power, until reaching the charge and discharge cut-off conditions; record the charge
and discharge time, and charge and discharge energy of each charge and discharge
event; calculate the energy retention rate each time;
c) The actual chargeable and dischargeable power, actual chargeable and dischargeable
energy and energy retention rate of the energy storage station shall comply with the
stipulations of GB/T 36549. If one of them fails, then, the energy storage station shall
be determined as disqualified.
7.3 Evaluation of Energy Efficiency
The evaluation of energy efficiency of the energy storage station is carried out in accordance
with the following method:
a) Check the historical data, such as: daily, monthly and yearly on-grid and off-grid
power, total power loss and station power consumption of the energy storage station
during the evaluation period; calculate in accordance with the stipulations of GB/T
36549;
b) The energy storage loss rate and station power consumption rate of the energy storage
station shall comply with the stipulations of GB/T 36549. If one of them fails, then,
the energy storage station shall be determined as disqualified.
7.4 Evaluation of Operating Status
The evaluation of operating status of the energy storage station is carried out in accordance with
the following method:
a) Check the historical data, such as: the number of times the dispatching institution
issued commands to the energy storage station, the number of times the energy storage
station successfully responded to the dispatching institution’s commands, the charged
quantity, discharged quantity, planned outage time, unplanned outage time and
shall be carried out on site in accordance with the method specified in GB/T 36548;
c) The charge / discharge response time, charge / discharge adjustment time, charge-to-
discharge switching time, and discharge-to-charge switching time of power control of
the energy storage station shall comply with the stipulations of GB/T 36547. If one
item fails, then, the energy storage station shall be determined as disqualified.
8.1.3 The evaluation of AGC response characteristics is carried out in accordance with the
following method:
a) Randomly check no less than 3 response AGC command events during the evaluation
period; record the indicators, such as: operating range, adjustment rate and adjustment
accuracy of each AGC command event;
b) The AGC input capacity range of the energy storage station shall be consistent with
the data reported to the dispatching institution. The adjustment rate and adjustment
accuracy shall comply with the provisions of the dispatch agreement. If one item fails,
then, the energy storage station shall be determined as disqualified.
8.2 Reactive Power Control
8.2.1 The evaluation of reactive power steady-state control is carried out in accordance with the
following method:
a) Check the reactive power issued value and grid-integration point reactive power
measured value during the evaluation period; mark the energy storage station
completing reactive power adjustment and maintaining stable power output for no
less than 15 min as a power adjustment event. When the deviation of the reactive
power issued value from the value issued at the previous moment exceeds 10% of the
rated reactive power, record it as a valid reactive power adjustment event; randomly
select no less than 5 valid reactive power adjustment events. The reactive power
adjustment event shall include inductive reactive power and capacitive reactive power
adjustment events;
b) When there are no valid power adjustment events in the historical data, the test shall
be carried out on-site in accordance with the method specified in GB/T 36548;
c) The reactive power deviation of the energy storage station shall comply with the
stipulations of GB/T 36547, otherwise, the energy storage station shall be determined
as disqualified.
8.2.2 The evaluation of reactive power dynamic response characteristics is carried out in
accordance with the following method:
a) Check the reactive power response events of the energy storage station of the voltage
fault ride-through period during the evaluation period. Randomly select no less than
5 valid reactive power dynamic response events; record the indicators, such as:
response time, voltage control deviation and power control deviation of each valid
reactive power dynamic response event. The reactive power adjustment event shall
include inductive reactive power and capacitive reactive power adjustment events;
b) When there are no valid reactive power dynamic events in the historical data, the test
shall be carried out on-site in accordance with the method specified in GB/T 36548;
c) The reactive power response time of the energy storage station shall satisfy the
requirements during voltage fault ride-through, otherwise, the energy storage station
shall be determined as disqualified.
8.2.3 The evaluation of AVC response characteristics is carried out in accordance with the
following method:
a) Randomly check no less than 3 AVC command response events of the energy storage
station during the evaluation period. Record the indicators, such as: adjustment range,
adjustment rate and adjustment accuracy of each AVC response event;
b) The AVC input capacity range of the energy storage station shall be consistent with
the data reported to the dispatching institution. The indicators, such as: adjustment
rate and power control deviation shall comply with the provisions of the dispatch
agreement. If one item fails, then, the energy storage station shall be determined as
disqualified.
8.2.4 The evaluation of power factor control is carried out in accordance with the following
method:
a) In accordance with the stipulations of GB/T 36548, operate on-site in the power factor
control mode, and record the continuously adjustable range of power factor;
b) The continuously adjustable range of power factor of the energy storage station shall
comply with the stipulations of GB/T 36547, otherwise, the energy storage station
shall be determined as disqualified.
8.3 Primary Frequency Modulation
The evaluation of primary frequency modulation of the energy storage station is carried out in
accordance with the following method:
a) Randomly check no less than 3 primary frequency modulation events, in which, the
energy storage station participates, during the evaluation period. Record the power
change amplitude, lag time, rise time, adjustment time and reactive power adjustment
deviation of each participation in the primary frequency modulation event;
b) Carry out on-site query of the dead zone setting range and error adjustment rate of
primary frequency modulation of the energy storage station;
c) When there are no valid primary frequency modulation event in the historical data,
a) Check the operating data, protective actions and grid-integration point power
operating status change records of the energy storage station during the evaluation
period;
b) Within the normal operating range of voltage, the energy storage station does not
trigger protective actions, and the grid-integration point power operating status does
not automatically switch. Under abnormal voltage operation, the energy storage
station shall perform fault ride-through. The technical parameters during the fault
ride-through shall comply with the stipulations of GB/T 36547, otherwise, the energy
storage station shall be determined as disqualified.
8.6 Power Quality of Grid-integrated Operation
The evaluation of power quality of grid-integrated operation is carried out in accordance with
the following method:
a) Check the historical data of online power quality monitoring device of the energy
storage station during grid-integrated operation;
b) If the energy storage station is not equipped with the online power quality monitoring
device, the test shall be carried out on-site in accordance with the method specified in
GB/T 36548, and recorded;
c) The harmonics of the energy storage station shall comply with the stipulations of
GB/T 14549; the inter-harmonics shall comply with the stipulations of GB/T 24337;
the three-phase voltage unbalance shall comply with the stipulations of GB/T 15543;
the voltage fluctuations and flickers shall comply with the stipulations of GB/T 12326.
If one item fails, then, the energy storage station shall be determined as disqualified.
8.7 Grid-integrated and Off-grid Switching
The evaluation of the energy storage station equipped with the function of grid-integrated and
off-grid switching is carried out in accordance with the following method:
a) Check the operating data of the energy storage station during the evaluation period.
Record the relay protection action records, voltage and frequency signals during the
planned grid-integrated to off-grid switching operation and off-grid to grid-integrated
switching operation process of the energy storage station;
b) When there are no valid grid-integrated and off-grid switching events in the historical
data, the test of grid-integrated to off-grid switching test shall be carried out on-site,
and the indicators, such as: voltage, frequency and power shall be recorded;
c) During the planned grid-integrated to off-grid and off-grid to grid-integrated
switching process of the energy storage station, if the energy storage station satisfies
the requirements that no relay protection action is triggered and no unplanned load
outage occurs, and the voltage during the switching process shall comply with the
Appendix B
(informative)
Information Collection Contents of Energy Storage Station Grid-integration
Characteristics Evaluation
B.1 Basic Information
The basic information of the energy storage station includes the following contents:
a) Name and geographical location of the proprietor or construction party; name and
functional orientation of power station;
b) Rated power and rated energy of energy storage station;
c) Primary electrical wiring topology, grid-integrated voltage level and grid-integrated
location;
d) Feasibility study report, power station construction drawings and preliminary design
documents;
e) Specifications and parameters, type test report, exit-factory test report and sampling
inspection report of equipment, such as: energy storage battery, battery management
system, energy storage converter and monitoring system, etc.;
f) Specifications and parameters, type test report and exit-factory test report of
equipment, such as: fire-fighting system, heating ventilation and air-conditioning
system, and booster station (switching station), etc.;
g) Debugging report, safety assessment report (if present) and grid-integration testing
report;
h) Power station registration documents, grid-integration dispatch agreement, electricity
purchase and sale contract, fire-fighting registration or approval documents, etc.
B.2 Evaluation Information
The information of grid-integration characteristics evaluation of the energy storage station
includes the following contents:
a) Protection value setting for primary and secondary equipment of the energy storage
station;
b) Electrical, electric quantity and event sequential records of power station operation,
and historical data of online power quality monitoring;
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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