CN115483742A

CN115483742A - Energy storage system detection method and device, computer equipment and storage medium

Info

Publication number: CN115483742A
Application number: CN202211248589.8A
Authority: CN
Inventors: 雅斯太; 刘紫琪; 翟寅; 高晨; 韩韬; 葛江溢; 连杰
Original assignee: Inner Mongolia Electric Power Research Institute of Inner Mongolia Power Group Co Ltd
Current assignee: Inner Mongolia Electric Power Research Institute of Inner Mongolia Power Group Co Ltd
Priority date: 2022-10-12
Filing date: 2022-10-12
Publication date: 2022-12-16

Abstract

The application provides a method and a device for detecting an energy storage system, computer equipment and a storage medium, wherein test specification data used for detecting the electrochemical energy storage system is determined from a preset test specification database according to performance information of the electrochemical energy storage system; for each charging frequency value in the at least one charging frequency value, charging the electrochemical energy storage system for the target charging time period through a power grid simulation device at the frequency of the charging frequency value; judging whether the electrochemical energy storage system is disconnected with the power grid simulation device or not after the electrochemical energy storage system is charged for the target charging time length by the power grid simulation device at the frequency of the charging frequency value; if so, the state of the electrochemical energy storage system is marked as abnormal. The method is adopted to detect the state of the electrochemical energy storage system.

Description

Energy storage system detection method and device, computer equipment and storage medium

Technical Field

The invention relates to the technical field of power energy storage, in particular to a method and a device for detecting an energy storage system, computer equipment and a storage medium.

Background

With the rapid development of energy storage technology, a large-scale energy storage system becomes an important means for ensuring the reliable operation of an electric power system, and the energy storage technology can not only improve the operation efficiency of electric power equipment and reduce the power supply cost, but also promote the consumption of new energy and improve the operation stability and reliability of a power grid. The energy storage modes are various, wherein the electrochemical energy storage is used for storing or releasing electric energy through reversible chemical reaction, and the energy storage device has the characteristics of high energy density, high conversion efficiency, short construction period, strong station site adaptability and the like, and is widely applied to an electric power system at present.

The inventor finds that, in research, because the state of the electrochemical energy storage system may change according to the service life, the operating environment, and the like, and an abnormal condition occurs, if the operation of the electrochemical energy storage system is directly started without detecting the operating state of the electrochemical energy storage system, a condition that the electrochemical energy storage system may not normally realize the function of the electrochemical energy storage system or cannot stably operate in a power grid may occur, and therefore, how to detect the state of the electrochemical energy storage system becomes an urgent problem to be solved.

Disclosure of Invention

In view of the above, the present invention provides a method, an apparatus, a computer device and a storage medium for detecting a state of an electrochemical energy storage system.

In a first aspect, an embodiment of the present application provides an energy storage system detection method, where the method includes:

determining test specification data used for detecting the electrochemical energy storage system from a preset test specification database according to the performance information of the electrochemical energy storage system, wherein the test specification data comprises at least one charging frequency value and a target charging duration;

for each charging frequency value in the at least one charging frequency value, charging the electrochemical energy storage system for the target charging time period through a power grid simulation device at the frequency of the charging frequency value;

judging whether the electrochemical energy storage system and the power grid simulation device are disconnected after the electrochemical energy storage system is charged for the target charging time by the power grid simulation device at the frequency of the charging frequency value;

and if the electrochemical energy storage system is disconnected from the power grid simulation device after the electrochemical energy storage system is charged to the electrochemical energy storage system for the target charging time period by the power grid simulation device at the frequency of the charging frequency value, marking the state of the electrochemical energy storage system as abnormal.

Optionally, after determining whether the electrochemical energy storage system is disconnected from the power grid simulation device after the power grid simulation device charges the electrochemical energy storage system for the target charging time at the frequency of the charging frequency value, the method further includes:

and if the electrochemical energy storage system and the power grid simulation device are not disconnected after the electrochemical energy storage system is charged for the target charging duration through the power grid simulation device at the frequency of each charging frequency value in the at least one charging frequency value, marking the state of the electrochemical energy storage system as normal.

Optionally, the test specification data further includes at least one discharge frequency value and a target discharge time period;

after determining, from a preset test specification database, test specification data for use in detecting the electrochemical energy storage system according to the performance information of the electrochemical energy storage system, the method further includes:

for each discharge frequency value in the at least one discharge frequency value, discharging the target discharge duration to the power grid simulation device through the electrochemical energy storage system at the frequency of the discharge frequency value;

judging whether the electrochemical energy storage system and the power grid simulation device are disconnected after the electrochemical energy storage system discharges the power grid simulation device for the target discharge time at the frequency of the discharge frequency value;

and if the electrochemical energy storage system and the power grid simulation device are disconnected after the electrochemical energy storage system discharges the power grid simulation device for the target discharge time at the frequency of the discharge frequency value, marking the state of the electrochemical energy storage system as abnormal.

Optionally, after determining whether the electrochemical energy storage system and the power grid simulation device are disconnected after the electrochemical energy storage system discharges to the power grid simulation device for the target discharge duration at the frequency of the discharge frequency value, the method further includes:

and if the electrochemical energy storage system does not disconnect with the power grid simulation device after the electrochemical energy storage system discharges the power grid simulation device for the target discharge time length at the frequency of each discharge frequency value in the at least one charge frequency value, the state of the electrochemical energy storage system is marked as normal.

Optionally, the test specification data further includes at least one active power value group and a target power supply duration, where each active power value group in the at least one active power value group includes a negative power value;

for each active power value group in the at least one active power value group, performing power supply on the electrochemical energy storage system for the target power supply time length by the grid simulation device at the power of the negative power value in the active power value group;

judging whether a first active power deviation value exceeds a preset first standard deviation value after the electrochemical energy storage system is powered for the target power-up duration by the power of the negative power value in the active power value group through the power grid simulation device, wherein the first active power deviation value is a difference value between a power value of time-sequence power output by the electrochemical energy storage system under the power supply of the power grid simulation device and the negative power value in the active power value group;

if the first active power deviation value exceeds the first standard deviation value, flagging a state of the electrochemical energy storage system as abnormal;

if the first active power deviation value does not exceed the first standard deviation value, the state of the electrochemical energy storage system is marked as normal.

Optionally, each active power value group of the at least one active power value group further includes a positive power value, and the positive power value and the negative power value are opposite numbers:

after, for each active power value group of the at least one active power value group, supplying power to the electrochemical energy storage system for the target power supply duration at the power of the negative power value in the active power value group by the grid simulation apparatus, the method further includes:

for each active power value group in the at least one active power value group, supplying power to the electrochemical energy storage system for the target power supply time period by the grid simulation device at the power of the positive power value in the active power value group;

judging whether a second active power deviation value exceeds a preset second standard deviation value after the electrochemical energy storage system is powered for the target power-up duration by the power of the positive power value in the active power value group through the power grid simulation device, wherein the second active power deviation value is a difference value between a power value of time-series power output by the electrochemical energy storage system under the power supply of the power grid simulation device and the positive power value in the active power value group;

if the second active power deviation value exceeds the second standard deviation value, marking the state of the electrochemical energy storage system as abnormal;

if the second active power deviation value does not exceed the second standard deviation value, the state of the electrochemical energy storage system is flagged as normal.

Optionally, the test specification data further includes a charge switching frequency value, a charge switching duration, a discharge switching frequency value, and a discharge switching duration, and after the test specification data used for detecting the electrochemical energy storage system is determined from a preset test specification database according to the performance information of the electrochemical energy storage system, the method further includes:

judging whether the electrochemical energy storage system is switched from a charging state to a discharging state after the electrochemical energy storage system is charged for the charging switching time by the power grid simulation device at the frequency of the charging switching frequency value, and judging whether the electrochemical energy storage system is switched from the discharging state to the charging state after the electrochemical energy storage system is discharged for the discharging switching time by the power grid simulation device at the frequency of the discharging switching frequency value;

if the electrochemical energy storage system is switched from the charging state to the discharging state after the electrochemical energy storage system is charged for the charging switching time by the power grid simulation device at the frequency of the charging switching frequency value, and the electrochemical energy storage system is switched from the discharging state to the charging state after the electrochemical energy storage system is discharged for the discharging switching time by the power grid simulation device at the frequency of the discharging switching frequency value, the state of the electrochemical energy storage system is marked as normal;

and if the electrochemical energy storage system is not switched from the charging state to the discharging state after the electrochemical energy storage system is charged for the charging switching time period by the power grid simulation device at the frequency of the charging switching frequency value, or the electrochemical energy storage system is not switched from the discharging state to the charging state after the electrochemical energy storage system is discharged for the discharging switching time period by the power grid simulation device at the frequency of the discharging switching frequency value, marking the state of the electrochemical energy storage system as abnormal.

In a second aspect, an embodiment of the present application provides an energy storage system detection apparatus, where the apparatus includes:

the system comprises a specification data determining module, a data processing module and a data processing module, wherein the specification data determining module is used for determining test specification data used for detecting an electrochemical energy storage system from a preset test specification database according to the performance information of the electrochemical energy storage system, and the test specification data comprises at least one charging frequency value and a target charging time;

the charging module is used for charging the electrochemical energy storage system for the target charging time length through a power grid simulation device at the frequency of the charging frequency value for each charging frequency value in the at least one charging frequency value;

the first judgment module is used for judging whether the electrochemical energy storage system and the power grid simulation device are disconnected after the electrochemical energy storage system is charged for the target charging time length by the power grid simulation device at the frequency of the charging frequency value;

the first marking module is used for marking the state of the electrochemical energy storage system as abnormal if the electrochemical energy storage system is disconnected with the power grid simulation device after the electrochemical energy storage system is charged to the electrochemical energy storage system for the target charging time period through the power grid simulation device at the frequency of the charging frequency value.

Optionally, the apparatus further comprises:

and the second marking module is used for marking the state of the electrochemical energy storage system as normal if the electrochemical energy storage system and the power grid simulation device are not disconnected after the electrochemical energy storage system and the power grid simulation device are respectively charged for the target charging time period by the power grid simulation device at the frequency of each charging frequency value in the at least one charging frequency value after the electrochemical energy storage system and the power grid simulation device are judged to be disconnected after the electrochemical energy storage system is charged for the target charging time period by the power grid simulation device at the frequency of the charging frequency value.

Optionally, the test specification data further includes at least one discharge frequency value and a target discharge duration;

the device further comprises:

the discharge module is used for determining test specification data used for detecting the electrochemical energy storage system from a preset test specification database according to the performance information of the electrochemical energy storage system, and then discharging the target discharge time length to the power grid simulation device through the electrochemical energy storage system at the frequency of the discharge frequency value for each discharge frequency value in the at least one discharge frequency value;

the second judgment module is used for judging whether the electrochemical energy storage system and the power grid simulation device are disconnected after the electrochemical energy storage system discharges the power grid simulation device for the target discharge time at the frequency of the discharge frequency value;

and the third marking module is used for marking the state of the electrochemical energy storage system as abnormal if the electrochemical energy storage system and the power grid simulation device are disconnected after the electrochemical energy storage system discharges to the power grid simulation device for the target discharge duration at the frequency of the discharge frequency value.

Optionally, the apparatus further comprises:

and the fourth marking module is configured to mark the state of the electrochemical energy storage system as normal if the electrochemical energy storage system and the power grid simulation device are not disconnected after the electrochemical energy storage system judges whether the electrochemical energy storage system and the power grid simulation device are disconnected after the electrochemical energy storage system discharges the power grid simulation device for the target discharge time at the frequency of each discharge frequency value of the at least one charge frequency value, and the power grid simulation device discharges the power grid simulation device for the target discharge time at the frequency of each discharge frequency value of the at least one charge frequency value.

Optionally, the test specification data further includes at least one active power value group and a target power supply duration, wherein each active power value group in the at least one active power value group includes a negative power value;

the device further comprises:

the first power supply module is used for determining test specification data used for detecting the electrochemical energy storage system from a preset test specification database according to the performance information of the electrochemical energy storage system, and for each active power value group in the at least one active power value group, performing power supply on the electrochemical energy storage system for the target power supply duration by the power grid simulation device with the power of a negative power value in the active power value group;

a third judging module, configured to judge whether a first active power deviation value exceeds a preset first standard deviation value after the electrochemical energy storage system is powered by the power grid simulation device for the target power-up duration with the power of the negative power value in the active power value group, where the first active power deviation value is a difference between a power value of the time-series power output by the electrochemical energy storage system under the power supply of the power grid simulation device and the negative power value in the active power value group;

a fifth marking module for marking the state of the electrochemical energy storage system as abnormal if the first active power deviation value exceeds the first standard deviation value;

a sixth marking module for marking a status of the electrochemical energy storage system as normal if the first active power deviation value does not exceed the first standard deviation value.

Optionally, each of the at least one active power value group further includes a positive power value, and the positive power value and the negative power value are opposite numbers;

the device further comprises:

a second power supply module, configured to, for each of the at least one set of active power values, perform power supply to the electrochemical energy storage system for the target power supply duration at the power of the positive power value in the set of active power values by the grid simulation device after performing the power supply to the electrochemical energy storage system for the target power supply duration at the power of the negative power value in the set of active power values by the grid simulation device;

a fourth judging module, configured to judge whether a second active power deviation value exceeds a preset second standard deviation value after the electrochemical energy storage system is powered by the power grid simulation device for the target power-up duration with the power of the positive power value in the active power value group, where the second active power deviation value is a difference between a power value of the timing power output by the electrochemical energy storage system under the power supply of the power grid simulation device and the positive power value in the active power value group;

a seventh marking module, configured to mark a status of the electrochemical energy storage system as abnormal if the second active power deviation value exceeds the second standard deviation value;

an eighth marking module for marking a status of the electrochemical energy storage system as normal if the second active power deviation value does not exceed the second standard deviation value.

Optionally, the test specification data further includes a charging switching frequency value, a charging switching duration, a discharging switching frequency value, and a discharging switching duration, and the apparatus further includes:

a fifth judging module, configured to, after determining test specification data used when detecting the electrochemical energy storage system from a preset test specification database according to performance information of the electrochemical energy storage system, judge whether the electrochemical energy storage system is switched from a charging state to a discharging state after the power grid simulation apparatus charges the electrochemical energy storage system for the charge switching duration at the frequency of the charge switching frequency value, and judge whether the electrochemical energy storage system is switched from the discharging state to the charging state after the electrochemical energy storage system discharges the power grid simulation apparatus for the discharge switching duration at the frequency of the discharge switching frequency value;

a ninth marking module, configured to mark the state of the electrochemical energy storage system as normal if the electrochemical energy storage system is switched from a charging state to a discharging state after the electrochemical energy storage system is charged for the charging switching duration at the frequency of the charging switching frequency value by the power grid simulation device, and the electrochemical energy storage system is switched from the discharging state to the charging state after the electrochemical energy storage system is discharged for the discharging switching duration at the frequency of the discharging switching frequency value by the power grid simulation device;

a tenth marking module, configured to mark the state of the electrochemical energy storage system as abnormal if the electrochemical energy storage system is not switched from the charging state to the discharging state after the electrochemical energy storage system is charged to the electrochemical energy storage system for the charging switching duration at the frequency of the charging switching frequency value by the power grid simulation device, or the electrochemical energy storage system is not switched from the discharging state to the charging state after the electrochemical energy storage system is discharged to the power grid simulation device for the discharging switching duration at the frequency of the discharging switching frequency value by the power grid simulation device.

In a third aspect, an embodiment of the present application provides a computer device, including: a processor, a memory and a bus, wherein the memory stores machine-readable instructions executable by the processor, the processor and the memory communicate via the bus when a computer device is running, and the machine-readable instructions, when executed by the processor, perform the steps of a method for energy storage system detection as described in any one of the optional embodiments of the first aspect.

In a fourth aspect, the present application provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, where the computer program is executed by a processor to perform the steps of the energy storage system detection method described in any optional implementation manner of the first aspect.

The technical scheme provided by the application comprises but is not limited to the following beneficial effects:

determining test specification data used for detecting the electrochemical energy storage system from a preset test specification database according to the performance information of the electrochemical energy storage system, wherein the test specification data comprises at least one charging frequency value and a target charging time; through the steps, the test specification data for reference can be determined according to the performance information of the electrochemical energy storage system to be detected.

For each charging frequency value in the at least one charging frequency value, charging the electrochemical energy storage system for the target charging time length through a power grid simulation device at the frequency of the charging frequency value; judging whether the electrochemical energy storage system is disconnected with the power grid simulation device or not after the electrochemical energy storage system is charged for the target charging time length by the power grid simulation device at the frequency of the charging frequency value; if the electrochemical energy storage system is disconnected from the power grid simulation device after the electrochemical energy storage system is charged for the target charging time period by the power grid simulation device at the frequency of the charging frequency value, the state of the electrochemical energy storage system is marked as abnormal; through the steps, whether the electrochemical energy storage system is abnormal or not can be determined according to the condition that whether the electrochemical energy storage system trips or not under the operation of the operation data indicated by the test specification data.

By adopting the method, the electrochemical energy storage system is charged by using the power grid simulation device, and whether an energy storage switch of the electrochemical energy storage system trips or not after charging is judged so as to detect the state of the electrochemical energy storage system.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.

Fig. 1 is a flowchart illustrating a method for detecting an energy storage system according to a first embodiment of the present invention;

fig. 2 is a flow chart illustrating another energy storage system detection method according to an embodiment of the present invention;

fig. 3 is a flowchart illustrating another energy storage system detection method according to an embodiment of the invention;

fig. 4 is a flowchart illustrating another energy storage system detection method according to an embodiment of the invention;

fig. 5 is a flow chart illustrating another energy storage system detection method according to an embodiment of the invention;

fig. 6 is a schematic structural diagram of a detection circuit according to a first embodiment of the present invention;

fig. 7 is a schematic structural diagram illustrating an energy storage system detection apparatus according to a second embodiment of the present invention;

fig. 8 is a schematic structural diagram illustrating another energy storage system detection apparatus according to a second embodiment of the present invention;

fig. 9 is a schematic structural diagram of another energy storage system detection apparatus provided in the second embodiment of the present invention;

fig. 10 is a schematic structural diagram illustrating another energy storage system detection apparatus provided in the second embodiment of the present invention;

fig. 11 is a schematic structural diagram of another energy storage system detection apparatus provided in the second embodiment of the present invention;

fig. 12 is a schematic structural diagram illustrating another energy storage system detection apparatus according to a second embodiment of the present invention;

fig. 13 is a schematic structural diagram illustrating another energy storage system detection apparatus according to a second embodiment of the present invention;

fig. 14 shows a schematic structural diagram of a computer device according to a third embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

Example one

For the convenience of understanding of the present application, the following describes a first embodiment of the present application in detail with reference to a content described in a flowchart of a method for detecting an energy storage system provided by the first embodiment of the present invention shown in fig. 1.

Referring to fig. 1, fig. 1 shows a flowchart of an energy storage system detection method provided in an embodiment of the present invention, where the method includes steps S101 to S104:

s101: determining test specification data used for detecting the electrochemical energy storage system from a preset test specification database according to the performance information of the electrochemical energy storage system, wherein the test specification data comprises at least one charging frequency value and a target charging time length.

Specifically, because different electrochemical energy storage systems may have different performances, and different test data are provided for the electrochemical energy storage systems with different performance information, before starting a test, test specification data required to be used for detecting the current electrochemical energy storage system needs to be determined from a preset test specification database according to the performance information of the electrochemical energy storage system.

The test specification data comprises at least one charging frequency value and a target charging duration, and the number and the arrangement sequence of the at least one charging frequency value can be set according to actual requirements.

S102: and for each charging frequency value in the at least one charging frequency value, charging the electrochemical energy storage system for the target charging time length through a power grid simulation device at the frequency of the charging frequency value.

Specifically, firstly, a frequency adaptability test of the electrochemical energy storage system is carried out, the power grid simulation device is connected with the electrochemical energy storage system, the energy storage system is set to operate in a charging state, the frequency of the power grid simulation device is adjusted to meet each charging frequency value in the at least one charging frequency value, and then, for each charging frequency value in the at least one charging frequency value, the power grid simulation device charges the electrochemical energy storage system for the target charging time length at the frequency of the charging frequency value.

For example, the frequency of the analog power grid device is adjusted to four points of 49.52Hz, 49.62Hz, 50.08Hz and 50.18Hz (two points are respectively taken at the part higher than the power frequency and the part lower than the power frequency), and the analog power grid device is continuously operated for 2min at each point.

S103: and judging whether the electrochemical energy storage system and the power grid simulation device are disconnected after the electrochemical energy storage system is charged for the target charging time period by the power grid simulation device at the frequency of the charging frequency value.

Specifically, for example, it is determined whether the electrochemical energy storage system is disconnected from the grid simulation apparatus after the grid simulation apparatus is charged at four points of 49.52Hz, 49.62Hz, 50.08Hz, and 50.18Hz for two minutes each time.

S104: and if the electrochemical energy storage system is disconnected from the power grid simulation device after the electrochemical energy storage system is charged for the target charging time period by the power grid simulation device at the frequency of the charging frequency value, marking the state of the electrochemical energy storage system as abnormal.

Specifically, for example, if the electrochemical energy storage system is disconnected from the grid simulation device after the electrochemical energy storage system is charged for two minutes at any one of four points of 49.52Hz, 49.62Hz, 50.08Hz, and 50.18Hz in the grid simulation device, the state of the electrochemical energy storage system is marked as abnormal.

In a possible embodiment, after determining whether the electrochemical energy storage system is disconnected from the grid simulation device after the grid simulation device performs the charging to the electrochemical energy storage system for the target charging time period at the frequency of the charging frequency value, the method further includes:

Specifically, for example, if the electrochemical energy storage system is not disconnected from the grid simulation device after the electrochemical energy storage system is charged for two minutes at all of the four points of the grid simulation device at 49.52Hz, 49.62Hz, 50.08Hz, and 50.18Hz, the state of the electrochemical energy storage system is marked as normal.

In one possible embodiment, the test specification data further includes at least one discharge frequency value and a target discharge time period.

Specifically, the at least one discharge frequency value comprises 48.02Hz, 48.52Hz, 49.02Hz and 49.48Hz, and the target discharge time is 2min.

Referring to fig. 2, fig. 2 is a flowchart illustrating another energy storage system detection method according to an embodiment of the present invention, where after determining test specification data used for detecting the electrochemical energy storage system from a preset test specification database according to performance information of the electrochemical energy storage system, the method further includes steps S201 to S203:

s201: and for each discharge frequency value in the at least one discharge frequency value, discharging the target discharge duration to the power grid simulation device through the electrochemical energy storage system at the frequency of the discharge frequency value.

S202: and judging whether the electrochemical energy storage system and the power grid simulation device are disconnected after the electrochemical energy storage system discharges the power grid simulation device for the target discharge time at the frequency of the discharge frequency value.

S203: and if the electrochemical energy storage system and the power grid simulation device are disconnected after the electrochemical energy storage system discharges the power grid simulation device for the target discharge time at the frequency of the discharge frequency value, marking the state of the electrochemical energy storage system as abnormal.

Specifically, referring to the charging process in steps S101 to S104, for each discharge frequency value of the at least one discharge frequency value, the electrochemical energy storage system discharges the power grid simulation device for the target discharge time at the frequency of the discharge frequency value.

For example, discharging the power grid simulation device by using an electrochemical energy storage device, adjusting the discharge frequency to four points (two points are respectively taken at the part higher than the power frequency and the part lower than the power frequency) of 49.52Hz, 49.62Hz, 50.08Hz and 50.18Hz, continuously operating for 2min at each point, and judging whether the electrochemical energy storage device is disconnected; and if any one point is disconnected, the electrochemical energy storage device is abnormal.

In a possible embodiment, after determining whether the electrochemical energy storage system and the grid simulation device are disconnected after the electrochemical energy storage system discharges to the grid simulation device for the target discharge duration at the frequency of the discharge frequency value, the method further includes:

and if the electrochemical energy storage system and the power grid simulation device are not disconnected after the electrochemical energy storage system discharges the power grid simulation device for the target discharge duration at the frequency of each discharge frequency value in the at least one charge frequency value, the state of the electrochemical energy storage system is marked as normal.

Specifically, if the separation does not occur at all the frequencies, it indicates that the electrochemical energy storage device is not abnormal.

In one possible embodiment, the test specification data further includes at least one set of active power values and a target power on duration, wherein each set of active power values in the at least one set of active power values includes a negative power value.

Specifically, for example, the at least one active power value group includes a first active power value group (-0.25 PN), a second active power value group (-0.5 PN), a third active power value group (-0.75 PN), a fourth active power value group (-PN), a fifth active power value group (0 PN), and the target power supply time period is 30s.

Referring to fig. 3, fig. 3 is a flowchart illustrating another energy storage system detection method according to an embodiment of the present invention, where after determining test specification data used for detecting the electrochemical energy storage system from a preset test specification database according to performance information of the electrochemical energy storage system, the method further includes steps S301 to S304:

s301: for each active power value group in the at least one active power value group, the electrochemical energy storage system is powered by the grid simulation device with the power of the negative power value in the active power value group for the target power supply duration.

Specifically, for example, the electrochemical energy storage system is powered for 30s with power of negative power value (-0.25 PN) in first set of active power values (-0.25 PN,0.25 PN), and similarly, the electrochemical energy storage system is powered for 30s with second set of active power values, third set of active power values, fourth set of active power values and fifth set of active power values.

S302: and judging whether a first active power deviation value exceeds a preset first standard deviation value after the electrochemical energy storage system is powered for the target power-up duration by the power of the negative power value in the active power value group through the power grid simulation device, wherein the first active power deviation value is a difference value between a power value of time-sequence power output by the electrochemical energy storage system under the power supply of the power grid simulation device and the negative power value in the active power value group.

Specifically, for example, after the electrochemical energy storage system is powered by the negative power value (-0.25 PN) in the first active power value group (-0.25 PN,0.25 PN) for 30s, whether the difference between the time-series power output by the electrochemical energy storage system and the negative power value (-0.25 PN) exceeds a preset first standard deviation value is determined, and then, after the electrochemical energy storage system is powered by the second active power value group, the third active power value group, the fourth active power value group and the fifth active power value group for 30s, whether the difference between the time-series power output by the electrochemical energy storage system and the negative power value of each active power value group exceeds a preset first standard deviation value is determined in sequence.

S303: and if the first active power deviation value exceeds the first standard deviation value, marking the state of the electrochemical energy storage system as abnormal.

Specifically, if the electrochemical energy storage system is powered for the target power-up duration by the power of the negative power value in the active power value group through the power grid simulation device, and then a first active power deviation value exceeds a preset first standard deviation value, it is determined that the electrochemical energy storage system is abnormal.

S304: if the first active power deviation value does not exceed the first standard deviation value, the state of the electrochemical energy storage system is marked as normal.

Specifically, if the first active power deviation value does not exceed the first standard deviation value, it indicates that there is no abnormality in the electrochemical energy storage system.

In a possible embodiment, each of the at least one set of active power values further comprises a positive power value, and the positive power value and the negative power value are opposite numbers.

Referring to fig. 4, fig. 4 shows a flowchart of another energy storage system detection method provided in the first embodiment of the present invention, wherein after the grid simulation apparatus supplies power to the electrochemical energy storage system for the target power supply time period with the power of the negative power value in the at least one active power value group through the grid simulation apparatus for each active power value group, the method further includes steps S401 to S404:

s401: for each active power value group in the at least one active power value group, the electrochemical energy storage system is powered by the grid simulation device with the power of the positive power value in the active power value group for the target power supply duration.

S402: and judging whether a second active power deviation value exceeds a preset second standard deviation value after the power grid simulation device supplies power to the electrochemical energy storage system for the target power-rise duration with the power of the positive power value in the active power value group, wherein the second active power deviation value is a difference value between a power value of the time-series power output by the electrochemical energy storage system under the power supply of the power grid simulation device and the positive power value in the active power value group.

S403: and if the second active power deviation value exceeds the second standard deviation value, marking the state of the electrochemical energy storage system as abnormal.

S404: if the second active power deviation value does not exceed the second standard deviation value, the status of the electrochemical energy storage system is flagged as normal.

Specifically, refer to the embodiments provided in steps S301 to S304.

In one possible embodiment, the test specification data further includes a charge switch frequency value, a charge switch duration, a discharge switch frequency value, and a discharge switch duration.

Referring to fig. 5, fig. 5 is a flowchart illustrating another energy storage system detection method according to an embodiment of the present invention, where after determining test specification data used for detecting the electrochemical energy storage system from a preset test specification database according to the performance information of the electrochemical energy storage system, the method further includes steps S501 to S504:

s501: and judging whether the electrochemical energy storage system is switched from a charging state to a discharging state after the electrochemical energy storage system is charged for the charging switching time period by the power grid simulation device at the frequency of the charging switching frequency value, and judging whether the electrochemical energy storage system is switched from the discharging state to the charging state after the electrochemical energy storage system is discharged for the discharging switching time period by the power grid simulation device at the frequency of the discharging switching frequency value.

Specifically, after the power grid simulation device charges the electrochemical energy storage system in a normal state for a specified time at a specified frequency of a charging switching frequency value, the electrochemical energy storage system is switched from a charging state to a discharging state; meanwhile, after the electrochemical energy storage system in a normal state discharges to the power grid simulation device for a specified time at a specified frequency of the discharge switching frequency value, the electrochemical energy storage system is switched from a discharge state to a charge state; therefore, whether the electrochemical energy storage system can simultaneously meet the two conditions is judged, and the state of the electrochemical energy storage system is judged.

S502: and if the electrochemical energy storage system is switched from the charging state to the discharging state after the electrochemical energy storage system is charged for the charging switching time by the power grid simulation device at the frequency of the charging switching frequency value, and the electrochemical energy storage system is switched from the discharging state to the charging state after the electrochemical energy storage system is discharged for the discharging switching time by the power grid simulation device at the frequency of the discharging switching frequency value, the state of the electrochemical energy storage system is marked as normal.

Specifically, if the electrochemical energy storage system can satisfy the above two conditions at the same time, the state of the electrochemical energy storage system is normal.

S503: and if the electrochemical energy storage system is not switched from the charging state to the discharging state after the electrochemical energy storage system is charged for the charging switching time by the power grid simulation device at the frequency of the charging switching frequency value, or the electrochemical energy storage system is not switched from the discharging state to the charging state after the electrochemical energy storage system is discharged for the discharging switching time by the power grid simulation device at the frequency of the discharging switching frequency value, the state of the electrochemical energy storage system is marked as abnormal.

Specifically, if the electrochemical energy storage system fails to satisfy the above two conditions at the same time, it indicates that the state of the electrochemical energy storage system is abnormal.

In testing the electrochemical energy storage system, in addition to the above method, the system state of the electrochemical energy storage system may be tested according to the following method.

The method comprises the following steps: and testing the voltage adaptability of the energy storage system, and simulating the change of the power grid voltage by using a power grid simulating device. Firstly, connecting an energy storage system with a simulation power grid device, setting the energy storage system to operate in a charging state, adjusting the output voltage of the simulation power grid device to 86%, 90%, 100%, 105% and 109% of the nominal voltage of a planned access power grid, continuously operating each point for 2min, and stopping testing if no tripping phenomenon occurs.

And adjusting the output voltage of the analog power grid device to 50%, 65%, 84%, 110%, 114% and 119% of the nominal voltage of the power grid to be accessed, and recording the opening time of the energy storage system. And adjusting the output voltage of the analog power grid device to 20%, 30%, 49%, 120%, 122% and 125% of the nominal voltage of the power grid to be accessed, and recording the opening time of the energy storage system. And repeating the steps in the test that the energy storage system operates in the discharging state.

The second method comprises the following steps: and (3) connecting the energy storage system with a module reporting power grid device (public power grid), adjusting all parameters to normal working conditions, and performing an active power adjusting capacity power-rise test. Firstly, setting the active power of an energy storage system to be 0, adjusting the set value of the active power to-0.25 PN (PN is nominal pressure), 0.25PN, -0.5PN, -0.75PN, -PN, PN and 0 step by step, keeping each power point for at least 30s, measuring the time sequence power at the parallel connection point of the energy storage system, taking the average value of the active power every 0.2s as one point, recording an actual measurement curve, calculating the average value of the active power for 15s according to the second 15s after the active power changes every time after the test, and calculating the control precision, the response time and the adjustment time of the active power of each point.

And (3) connecting the energy storage system with a module reporting power grid device (public power grid), adjusting all parameters to normal working conditions, and performing an active power adjusting capacity power reduction test. Firstly, setting the active power of an energy storage system as PN, adjusting the set value of the active power to-PN, 0.75PN, -0.75PN,0.5PN, -0.5PN,0.25PN, -0.25PN and 0 step by step, keeping each power point for at least 30s, measuring the time sequence power at the grid connection point of the energy storage system, taking the average value of the active power of every 0.2s as one point, recording an actually measured curve, calculating the average value of the active power of 15s by taking the second 15s after the active power changes every time after the test, and calculating the control precision, the response time and the adjusting time of the active power of each point.

The third method comprises the following steps: and (3) connecting the energy storage system with a simulation power grid device (public power grid), adjusting all parameters to normal working conditions, and carrying out reactive power regulation capability charging mode test. Firstly, setting active power of an energy storage system as PN, adjusting the energy storage system to operate in a working mode of outputting maximum inductive reactive power, adjusting the set value of the active power to 0.9PN,0.8PN,0.7PN,0.6PN, 0.5PN,0.4PN,0.3PN,0.2PN, 0.1PN and 0 step by step, measuring time sequence power at the grid-connected point of the energy storage system, at least recording 30s of active power and reactive power, and calculating the average value of the active power and the reactive power in the second 15s by taking the average value of the power of every 0.2s as a point; and adjusting the energy storage system to operate in a mountain-transporting maximum capacitive reactive power working mode, and repeating the steps. And finally, drawing a power envelope diagram of the energy storage system by taking the active power as an abscissa and the reactive power as an ordinate.

And (3) connecting the energy storage system with a simulation power grid device (public power grid), adjusting all parameters to normal working conditions, and carrying out reactive power regulation capability discharge mode test. Firstly, setting the active power of an energy storage system as PN, adjusting the energy storage system to operate in a working mode of outputting the maximum inductive reactive power, adjusting the set value of the active power to 0.9PN,0.8PN,0.7PN,0.6PN, 0.5PN,0.4PN,0.3PN,0.2PN, 0.1PN and 0 step by step, measuring time sequence power at the grid-connected point of the energy storage system, at least recording 30s of active power and reactive power, and calculating the average value of the active power and the reactive power in the second 15s by taking the average value of the power of each 0.2s as a point; and adjusting the energy storage system to operate in a mountain-transporting maximum capacitive reactive power working mode, and repeating the steps. And finally, drawing a power envelope diagram of the energy storage system by taking the active power as an abscissa and the reactive power as an ordinate.

The method comprises the following steps: and (3) connecting the energy storage system with a simulation power grid device (public power grid), adjusting all parameters to normal working conditions, and testing the power factor adjusting capability. Firstly, respectively adjusting the discharge active power of an energy storage system to four points of 0.25PN, 0.5PN,0.75PN and PN; continuously adjusting the power factor of the energy storage system from 0.95 in advance to 0.95 in lag, measuring and recording the power factor actually output by the energy storage system, wherein the adjustment amplitude is not more than 0.01; then, the charging active power of the energy storage system is respectively adjusted to four points of 0.25PN, 0.5PN,0.75PN and PN; and (3) adjusting the power factor of the energy storage system from 0.95 leading to 0.95 lagging continuously, wherein the adjusting amplitude is not more than 0.01, and measuring and recording the power factor actually output by the energy storage system.

The method five comprises the following steps: adjusting the energy storage system to a hot standby state, setting the charging active power set value of the energy storage system to 1.1PN, continuously operating for 10min, measuring time sequence power at a grid-connected point of the energy storage system, taking the active power average value of every 0.2S as a point, and recording an actual measurement curve; setting the charging active power set value of the energy storage system to 1.2PN, continuously operating for 1min, measuring the time sequence power at the grid-connected point of the energy storage system, taking the average value of the active power every 0.2s as a point, and recording the actual measurement curve.

Adjusting the energy storage system to a hot standby state, setting the discharge active power set value of the energy storage system to 1.1PN, continuously operating for 10min, measuring time sequence power at a grid-connected point of the energy storage system, taking the active power average value of every 0.2S as a point, and recording an actual measurement curve; setting the charging active power set value of the energy storage system to 1.2PN, continuously operating for 1min, measuring the time sequence power at the grid-connected point of the energy storage system, taking the average value of the active power every 0.2s as a point, and recording the actual measurement curve.

The method six comprises the following steps: before the low voltage ride through test is carried out by the energy storage system with 10 (6) kV or above voltage level connected to the power grid, the following preparation needs to be made, and the energy storage system should work in a control mode consistent with the actual operation. Connecting the energy storage system, the grid fault simulation generation device, the data acquisition device and other associated equipment, selecting 0% UN, 20% UN, 35% UN, 50% UN, 75% UN, 90% UN six fall points (UN is the nominal voltage), and selecting the fall time according to preset rules.

Before the low voltage ride through test, an idle load test should be carried out, and the energy storage converter of the energy storage system to be tested should be in a disconnection state. Firstly, adjusting a power grid fault simulation generating device, simulating a three-phase symmetrical fault of a circuit, and selecting a voltage drop point according to the requirements in test preparation; and adjusting a power grid fault simulation generating device, simulating two-phase short circuit or grounding short circuit faults, selecting a voltage drop point according to the requirements in test preparation, and recording a grid connection point voltage curve of the energy storage system.

And under the condition that the no-load test result meets the requirement, the low-voltage ride-through load test can be carried out, and the configuration of the power grid fault simulation generating device during the load test is consistent with that of the no-load test. Firstly, connecting an energy storage system disconnected in a no-load test into a power grid for running, adjusting the output power of the energy storage system to be 0.2PN, controlling a power grid fault simulation generation device to carry out three-phase symmetrical voltage drop, recording the waveforms of voltage and current of a grid-connected point of the energy storage system, and recording data from 15s before the voltage drop to 10s after the voltage recovers to be normal; and controlling the power grid fault simulation generating device to perform asymmetric voltage sag, recording the waveforms of the voltage and the current of a grid-connected point of the energy storage system, and recording data from 15s before the voltage sag to 10s after the voltage recovers to be normal. And adjusting the mountain conveying power of the energy storage system to the rated power PN, and repeating the test steps.

The method comprises the following steps: before the high voltage ride through test is carried out by the energy storage system with 10 (6) kV or above voltage class connected to the power grid, the following preparation needs to be made, and the energy storage system should work in a control mode consistent with the actual operation. Connecting the energy storage system, the grid fault simulation generation device, the data acquisition device and other related equipment, selecting three points of 110% UN, 125% UN and 130% UN, and selecting the lifting time according to a preset rule.

Before the high voltage ride through test, an idle load test should be carried out, and the energy storage converter of the energy storage system to be tested should be in a disconnection state. Firstly, adjusting a power grid fault simulation generating device, simulating the three-phase voltage lifting of a circuit, selecting a voltage lifting point according to the requirements in test preparation, and recording a grid-connected point voltage curve of the energy storage system. Under the condition that the no-load test result meets the requirement, a high-voltage ride-through load test can be carried out, and the configuration of the power grid fault simulation generating device during the load test is consistent with that of the no-load test. Firstly, an energy storage system disconnected in a no-load test is connected to a power grid to operate, the output power of the energy storage system is adjusted to be 0.2PN, a power grid fault simulation generation device is controlled to carry out three-phase symmetrical voltage lifting, the waveforms of voltage and current of a grid-connected point of the energy storage system are recorded, and data at least from 15s before the voltage is lifted to 10s after the voltage is recovered to be normal are recorded. And adjusting the mountain conveying power of the energy storage system to the rated power PN, and repeating the test steps.

The method comprises the following steps: and (4) testing the network-related protection function: the power-grid-related protection function test of the energy storage system is in accordance with the regulations of DL/T995 (relay protection and power grid safety automatic device inspection regulations).

The method comprises the following steps: and (3) testing an unplanned island protection function: and testing the unplanned islanding protection characteristic of the energy storage system. Referring to fig. 6, fig. 6 is a schematic structural diagram of a detection circuit according to a first embodiment of the present invention, where the circuit includes a power grid simulation apparatus, a load, a switch S1, a switch S2, a switch S3, and an energy storage system, and the diagram shows phase-to-neutral wiring for a three-phase four-wire system energy storage system, and the diagram shows interphase wiring for a three-phase three-wire system energy storage system.

Firstly, setting an anti-islanding protection fixed value of an energy storage system, adjusting the discharge power of the energy storage system to a rated power, setting the voltage of a simulation power grid device (public power grid) as the nominal voltage of the energy storage system, wherein the frequency is the rated frequency of the energy storage system, the quality factor Q of a load is adjusted to be 1.0 +/-0.05, closing switches S1, S2 and S3 until the energy storage system reaches a specified value, adjusting the load until the fundamental wave current of each phase passing through the switch S3 is less than 2% of the steady rated current of each phase of the energy storage system, disconnecting the S3, recording the time interval from disconnecting the S3 to stopping supplying power to the load, namely the disconnection time, and adjusting the reactive load to increase by 1% (or adjusting the reactive power of the energy storage system to increase by 1%) within the range of 95% -105% of an initial balanced load, and additionally increasing 1% of the reactive load (or the reactive power) if the disconnection time of the energy storage system increases, until the disconnection time of the energy storage system does not increase any more; in the test result, three test points with the longest disconnection time are subjected to 2 additional repeated tests, and when the three longest disconnection times appear on the discontinuous 1% load increment value, all the test points among the three longest disconnection times are subjected to 2 additional repeated tests, the output power of the energy storage system is adjusted to 66% and 33% of the rated power respectively, and the test steps are repeated respectively.

The method comprises the following steps: and (3) testing charging response time: and adjusting the energy storage system to a hot standby state under the condition of rated power charge and discharge, and testing the charge response time. Firstly, recording the moment when the energy storage system receives the control signal as t _Cl Recording the moment when the charging power of the energy storage system reaches 90% of the rated power for the first time as t _C2 Subtracting the two recorded moments to calculate the charging response time RT _c And repeating the step for 5 times, and taking the average value of the test results of 5 times according to the charging response time.

The method eleven comprises the following steps: discharge response time test: and under the condition of rated power discharge electricity, adjusting the energy storage system to a hot standby state, and testing the discharge response time. Firstly, recording the moment when the energy storage system receives the control signal as t _Dl Recording the moment when the discharge power of the energy storage system reaches 90% of the rated power for the first time as t _D2 Subtracting the two recorded moments to calculate the discharge response time RT _D The above procedure was repeated five times, and the discharge response time was averaged over 5 test results.

The method twelve: and adjusting the energy storage system to a hot standby state under the condition of rated power charge and discharge, and testing the charge regulation time. Firstly, recording the moment when the energy storage system receives the control signal as t _C3 Recording the initial time when the deviation of the charging power of the energy storage system is maintained within +/-2% of the rated power, and recording as t _C4 Subtracting the two recorded moments to calculate the charging response time AT _C Repeating the above steps for 5 times, and averaging the charging regulation time of 5 times。

The method thirteen comprises the following steps: and adjusting the energy storage system to a hot standby state under the rated power charging and discharging conditions, and testing the discharging regulation time. Firstly, recording the moment when the energy storage system receives the control signal as t _D3 Recording the initial time when the deviation of the discharge power of the energy storage system is maintained within +/-2% of the rated power and recording as t _D4 Subtracting the two recorded moments to calculate the discharge response time AT _D And repeating the step for 5 times, and taking the average value of the 5 test results of the discharge regulation time.

The method is fourteen: and under the condition of rated power charge and discharge, adjusting the energy storage system to a hot standby state, and performing charge-discharge conversion time. Firstly, setting an energy storage system to charge at rated power, sending a discharge command at rated power to the energy storage system, and recording the time t from 90 percent of rated power charging to 90 percent of rated power discharging ₁ And repeating the steps for 5 times, and taking the average value of the test results of 5 times of charge-discharge conversion time.

Fifteen methods: and under the condition of rated power charge and discharge, adjusting the energy storage system to a hot standby state, and performing discharge-to-charge conversion time. Firstly, setting an energy storage system to discharge at rated power, sending a charging command at rated power to the energy storage system, and recording the time t from 90 percent of rated power discharge to 90 percent of rated power charge ₂ And repeating the step for 5 times, and averaging the test results of 5 times of discharge-to-charge conversion time.

The method is sixteen: under the stable operation state, the energy storage system tests the charging energy and the discharging energy of the energy storage system under the rated power charging and discharging conditions. Firstly, stopping discharging when discharging to the discharging termination condition at rated power, stopping charging when charging to the charging termination condition at rated power, and recording the energy E charged by the energy storage system in the charging process _C And auxiliary energy consumption W _C Stopping discharging when discharging to the discharge termination condition at rated power, and recording the energy E discharged by the energy storage system in the discharging process _D And auxiliary energy consumption W _D Repeating the above steps twice, and recording the charge and discharge energy E of each time _Cn 、E _Dn And auxiliary energy consumption W _Cn 、W _Dn The average value is calculated according to the following formula, and is recorded as E _C For rated charging energy of the energy storage system, E _D Is the rated discharge energy of the energy storage system.

Wherein E is _C1 For the first charging energy, W _C1 For auxiliary power consumption in the first charging, E _C2 For the second charging energy, W _C2 For auxiliary energy consumption in the second charging, E _C3 For the third charging of energy, W _C3 Auxiliary energy consumption in the third charging; e _D1 Is the first discharge energy, W _D1 For auxiliary power consumption in the first discharge, E _D2 Is the second discharge energy, W _D2 For auxiliary power consumption in the second discharge, E _D3 Energy of the third discharge, W _D3 Is the auxiliary energy consumption in the third discharge.

Seventhly, the method comprises the following steps: and under the stable operation state, testing the rated power energy conversion efficiency of the energy storage system under the rated power charging and discharging conditions. Firstly, stopping discharging when discharging to a discharging termination condition with preset power, stopping charging when charging to a charging termination condition with rated power, and recording the energy E charged by the energy storage system in the charging process _C And auxiliary energy consumption W _C Stopping discharging when discharging to the discharge termination condition at rated power, and recording the energy E discharged by the energy storage system in the discharging process _D And auxiliary energy consumption W _D Repeating the above steps twice, and recording the charge and discharge energy E _Cn 、E _Dn And auxiliary energy consumption W _Cn 、W _Dn The energy conversion efficiency η is calculated according to the following equation.

Wherein, E _C1 For the first charging of energy, W _C1 For auxiliary power consumption in the first charging, E _C2 For the second charging energy, W _C2 For auxiliary energy consumption in the second charging, E _C3 For a third charging of energy, W _C3 Auxiliary energy consumption in the third charging; e _D1 Is the first discharge energy, W _D1 For auxiliary power consumption in the first discharge, E _D2 Is the second discharge energy, W _D2 For auxiliary power consumption in the second discharge, E _D3 Energy of the third discharge, W _D3 Is the auxiliary energy consumption in the third discharge.

Example two

Referring to fig. 7, fig. 7 is a schematic structural diagram illustrating an energy storage system detection apparatus according to a second embodiment of the present invention, where the energy storage system detection apparatus according to the second embodiment of the present invention includes:

the specification data determining module 701 is configured to determine, from a preset test specification database, test specification data used for detecting an electrochemical energy storage system according to performance information of the electrochemical energy storage system, where the test specification data includes at least one charging frequency value and a target charging duration;

a charging module 702, configured to, for each charging frequency value in the at least one charging frequency value, charge the electrochemical energy storage system for the target charging duration at the frequency of the charging frequency value through a power grid simulation apparatus;

a first determining module 703, configured to determine whether the electrochemical energy storage system and the power grid simulation apparatus are disconnected after the power grid simulation apparatus charges the electrochemical energy storage system for the target charging duration at the frequency of the charging frequency value;

a first marking module 704, configured to mark a state of the electrochemical energy storage system as abnormal if the electrochemical energy storage system is disconnected from the power grid simulation apparatus after the electrochemical energy storage system is charged to the electrochemical energy storage system for the target charging duration at the frequency of the charging frequency value by the power grid simulation apparatus.

In a possible implementation, referring to fig. 8, fig. 8 is a schematic structural diagram of another energy storage system detection apparatus provided in the second embodiment of the present invention, where the apparatus further includes:

a second marking module 801, configured to, after determining whether the electrochemical energy storage system and the power grid simulation device are disconnected after the electrochemical energy storage system is charged to the electrochemical energy storage system for the target charging duration at the frequency of the charging frequency value by the power grid simulation device, mark a state of the electrochemical energy storage system as normal if neither the electrochemical energy storage system nor the power grid simulation device is disconnected after the electrochemical energy storage system is charged to the electrochemical energy storage system for the target charging duration at the frequency of each charging frequency value of the at least one charging frequency value by the power grid simulation device.

In one possible embodiment, the test specification data further includes at least one discharge frequency value and a target discharge time period;

referring to fig. 9, fig. 9 is a schematic structural diagram of another energy storage system detection apparatus provided in the second embodiment of the present invention, where the apparatus further includes:

the discharging module 901 is configured to, after determining, according to performance information of the electrochemical energy storage system, test specification data used for detecting the electrochemical energy storage system from a preset test specification database, for each discharge frequency value in the at least one discharge frequency value, perform, by the electrochemical energy storage system, discharging for the target discharge duration to the power grid simulation apparatus at the frequency of the discharge frequency value;

a second determining module 902, configured to determine whether the electrochemical energy storage system and the power grid simulation apparatus are disconnected after the electrochemical energy storage system discharges the power grid simulation apparatus for the target discharge duration at the frequency of the discharge frequency value;

a third marking module 903, configured to mark the state of the electrochemical energy storage system as abnormal if the electrochemical energy storage system is disconnected from the power grid simulation device after the electrochemical energy storage system discharges to the power grid simulation device for the target discharge duration at the frequency of the discharge frequency value.

In a possible implementation, referring to fig. 10, fig. 10 is a schematic structural diagram of another energy storage system detection apparatus provided in the second embodiment of the present invention, where the apparatus further includes:

a fourth marking module 1001, configured to, after determining whether the electrochemical energy storage system and the power grid simulation device are disconnected after performing the discharge for the target discharge duration to the power grid simulation device by the electrochemical energy storage system at the frequency of the discharge frequency value, mark the state of the electrochemical energy storage system as normal if neither the electrochemical energy storage system nor the power grid simulation device is disconnected after performing the discharge for the target discharge duration to the power grid simulation device by the electrochemical energy storage system at the frequency of each discharge frequency value of the at least one charge frequency value.

In one possible embodiment, the test specification data further includes at least one set of active power values and a target power on duration, wherein each set of active power values in the at least one set of active power values includes a negative power value;

referring to fig. 11, fig. 11 is a schematic structural diagram of another energy storage system detection apparatus provided in the second embodiment of the present invention, where the apparatus further includes:

the first power supply module 1101 is configured to, after determining test specification data used for detecting the electrochemical energy storage system from a preset test specification database according to the performance information of the electrochemical energy storage system, perform, for each active power value group in the at least one active power value group, power supply for the target power supply duration to the electrochemical energy storage system through the grid simulation device with the power of a negative power value in the active power value group;

a third determining module 1102, configured to determine whether a first active power deviation value exceeds a preset first standard deviation value after the electrochemical energy storage system is powered by the grid simulation device for the target power-up duration with the power of the negative power value in the active power value group, where the first active power deviation value is a difference between a power value of the time-series power output by the electrochemical energy storage system under the power supply of the grid simulation device and the negative power value in the active power value group;

a fifth marking module 1103, configured to mark a status of the electrochemical energy storage system as abnormal if the first active power deviation value exceeds the first standard deviation value;

a sixth labeling module 1104 for labeling a status of the electrochemical energy storage system as normal if the first active power deviation value does not exceed the first standard deviation value.

Referring to fig. 12, fig. 12 is a schematic structural diagram illustrating another energy storage system detection apparatus provided in the second embodiment of the present invention, where the apparatus further includes:

a second power supply module 1201, configured to, for each of the at least one set of active power values, perform, by the grid simulation apparatus, power supply to the electrochemical energy storage system for the target power supply duration at a power of a negative power value in the set of active power values, and then perform, for each of the at least one set of active power values, power supply to the electrochemical energy storage system for the target power supply duration at a power of a positive power value in the set of active power values;

a fourth determining module 1202, configured to determine whether a second active power deviation value exceeds a preset second standard deviation value after the electrochemical energy storage system is powered by the grid simulation device for the target power-up duration with the power of the positive power value in the active power value group, where the second active power deviation value is a difference between a power value of the time-series power output by the electrochemical energy storage system under the power supply of the grid simulation device and the positive power value in the active power value group;

a seventh marking module 1203, configured to mark the state of the electrochemical energy storage system as abnormal if the second active power deviation value exceeds the second standard deviation value;

an eighth marking module 1204 for marking a status of the electrochemical energy storage system as normal if the second active power deviation value does not exceed the second standard deviation value.

Referring to fig. 13, fig. 13 is a schematic structural diagram illustrating another energy storage system detection apparatus provided in the second embodiment of the present invention, where the apparatus further includes:

a fifth judging module 1301, configured to, after determining test specification data used for detecting the electrochemical energy storage system from a preset test specification database according to performance information of the electrochemical energy storage system, judge whether the electrochemical energy storage system is switched from a charging state to a discharging state after the power grid simulation apparatus charges the electrochemical energy storage system for the charge switching duration at the frequency of the charge switching frequency value, and judge whether the electrochemical energy storage system is switched from the discharging state to the charging state after the electrochemical energy storage system discharges the power grid simulation apparatus for the discharge switching duration at the frequency of the discharge switching frequency value;

a ninth marking module 1302, configured to mark the state of the electrochemical energy storage system as normal if the electrochemical energy storage system is switched from the charging state to the discharging state after the electrochemical energy storage system is charged to the electrochemical energy storage system for the charging switching duration at the frequency of the charging switching frequency value by the power grid simulation device, and the electrochemical energy storage system is switched from the discharging state to the charging state after the electrochemical energy storage system is discharged to the power grid simulation device for the discharging switching duration at the frequency of the discharging switching frequency value;

a tenth marking module 1303, configured to mark the state of the electrochemical energy storage system as abnormal if the electrochemical energy storage system is not switched from the charging state to the discharging state after the electrochemical energy storage system is charged to the electrochemical energy storage system for the charging switching duration at the frequency of the charging switching frequency value by the power grid simulation device, or if the electrochemical energy storage system is not switched from the discharging state to the charging state after the electrochemical energy storage system is discharged to the power grid simulation device for the discharging switching duration at the frequency of the discharging switching frequency value by the electrochemical energy storage system.

EXAMPLE III

Based on the same application concept, referring to fig. 14, fig. 14 shows a schematic structural diagram of a computer device provided in a third embodiment of the present invention, where as shown in fig. 14, a computer device 1400 provided in the third embodiment of the present invention includes:

a processor 1401, a memory 1402 and a bus 1403, wherein the memory 1402 stores machine readable instructions executable by the processor 1401, and when the computer device 1400 runs, the processor 1401 and the memory 1402 communicate via the bus 1403, and the machine readable instructions are executed by the processor 1401 to perform the steps of the energy storage system detection method according to the first embodiment.

Example four

Based on the same application concept, embodiments of the present application further provide a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program performs the steps of a method for detecting an energy storage system according to any of the foregoing embodiments.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the system and the apparatus described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

The computer program product for performing energy storage system detection provided in the embodiment of the present invention includes a computer-readable storage medium storing a program code, where instructions included in the program code may be used to execute the method described in the foregoing method embodiment, and specific implementation may refer to the method embodiment, which is not described herein again.

The energy storage system detection device provided by the embodiment of the invention can be specific hardware on equipment or software or firmware installed on the equipment. The device provided by the embodiment of the present invention has the same implementation principle and the same technical effects as those of the foregoing method embodiments, and for the sake of brief description, reference may be made to corresponding contents in the foregoing method embodiments for the parts of the device embodiments that are not mentioned. It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the foregoing systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described apparatus embodiments are merely illustrative, and for example, the division of the units into only one type of logical function may be implemented in other ways, and for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some communication interfaces, and may be in an electrical, mechanical or other form.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus once an item is defined in one figure, it need not be further defined and explained in subsequent figures, and moreover, the terms "first", "second", "third", etc. are used merely to distinguish one description from another and are not to be construed as indicating or implying relative importance.

Claims

1. An energy storage system detection method, the method comprising:

determining test specification data used for detecting the electrochemical energy storage system from a preset test specification database according to the performance information of the electrochemical energy storage system, wherein the test specification data comprises at least one charging frequency value and a target charging time;

judging whether the electrochemical energy storage system is disconnected with the power grid simulation device or not after the electrochemical energy storage system is charged for the target charging time length by the power grid simulation device at the frequency of the charging frequency value;

2. The method of claim 1, wherein after determining whether the electrochemical energy storage system is disconnected from the grid simulating device after the grid simulating device determines that the electrochemical energy storage system is charged to the electrochemical energy storage system for the target charging duration at the frequency of the charging frequency value, the method further comprises:

3. The method of claim 1, wherein the test specification data further comprises at least one discharge frequency value and a target discharge time duration;

judging whether the electrochemical energy storage system and the power grid simulation device are disconnected after the electrochemical energy storage system discharges the target discharge duration to the power grid simulation device at the frequency of the discharge frequency value;

4. The method of claim 3, wherein after determining whether the electrochemical energy storage system is disconnected from the grid simulating device after the electrochemical energy storage system discharges to the grid simulating device at the frequency of the discharge frequency value for the target discharge time period, the method further comprises:

5. The method of claim 1, wherein the test specification data further comprises at least one set of active power values and a target power on time period, wherein each set of active power values in the at least one set of active power values comprises a negative power value;

judging whether a first active power deviation value exceeds a preset first standard deviation value after the electrochemical energy storage system is powered on by the power grid simulation device for the target power-rise duration with the power of the negative power value in the active power value group, wherein the first active power deviation value is a difference value between a power value of time-sequence power output by the electrochemical energy storage system under the power supply of the power grid simulation device and the negative power value in the active power value group;

if the first active power deviation value exceeds the first standard deviation value, the state of the electrochemical energy storage system is marked as abnormal;

if the first active power deviation value does not exceed the first standard deviation value, the state of the electrochemical energy storage system is flagged as normal.

6. The method according to claim 5, wherein each of the at least one set of active power values further comprises a positive power value, and wherein the positive power value and the negative power value are opposite numbers of each other:

if the second active power deviation value exceeds the second standard deviation value, the state of the electrochemical energy storage system is marked as abnormal;

if the second active power deviation value does not exceed the second standard deviation value, the status of the electrochemical energy storage system is flagged as normal.

7. The method of claim 1, wherein the test specification data further comprises a charge switch frequency value, a charge switch duration, a discharge switch frequency value, and a discharge switch duration, and wherein after determining the test specification data for use in testing the electrochemical energy storage system from a pre-defined test specification database based on the performance information of the electrochemical energy storage system, the method further comprises:

judging whether the electrochemical energy storage system is switched from a charging state to a discharging state after the electrochemical energy storage system is charged for the charging switching time duration at the frequency of the charging switching frequency value by the power grid simulation device, and judging whether the electrochemical energy storage system is switched from the discharging state to the charging state after the electrochemical energy storage system is discharged for the discharging switching time duration at the frequency of the discharging switching frequency value by the power grid simulation device;

if the electrochemical energy storage system is switched from the charging state to the discharging state after the electrochemical energy storage system is charged for the charging switching time period by the power grid simulation device at the frequency of the charging switching frequency value, and the electrochemical energy storage system is switched from the discharging state to the charging state after the electrochemical energy storage system is discharged for the discharging switching time period by the power grid simulation device at the frequency of the discharging switching frequency value, the state of the electrochemical energy storage system is marked as normal;

and if the electrochemical energy storage system is not switched from the charging state to the discharging state after the electrochemical energy storage system is charged for the charging switching time by the power grid simulation device at the frequency of the charging switching frequency value, or the electrochemical energy storage system is not switched from the discharging state to the charging state after the electrochemical energy storage system is discharged for the discharging switching time by the power grid simulation device at the frequency of the discharging switching frequency value, the state of the electrochemical energy storage system is marked as abnormal.

8. An energy storage system testing apparatus, the apparatus comprising:

the first judging module is used for judging whether the electrochemical energy storage system and the power grid simulation device are disconnected after the electrochemical energy storage system is charged for the target charging time period by the power grid simulation device at the frequency of the charging frequency value;

9. A computer device, comprising: a processor, a memory and a bus, the memory storing machine-readable instructions executable by the processor, the processor and the memory communicating over the bus when a computer device is running, the machine-readable instructions when executed by the processor performing the steps of a method of energy storage system detection as claimed in any one of claims 1 to 7.

10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of a method for energy storage system detection according to any one of claims 1 to 7.