CN214585890U - High-low voltage ride through testing equipment for energy storage system - Google Patents
High-low voltage ride through testing equipment for energy storage system Download PDFInfo
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- CN214585890U CN214585890U CN202023125975.7U CN202023125975U CN214585890U CN 214585890 U CN214585890 U CN 214585890U CN 202023125975 U CN202023125975 U CN 202023125975U CN 214585890 U CN214585890 U CN 214585890U
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Abstract
The application discloses energy storage system high-low voltage passes through test equipment. The high-low voltage ride through test equipment of the energy storage system comprises: the power supply input end, the power grid simulation device and the power supply output end are sequentially connected, and the testing device is in communication connection with the power grid simulation device; the power supply input end is used for connecting a power grid connected as a power supply; the power supply output end is used for taking the voltage output by the power grid simulation device as simulated power grid voltage to be connected into the energy storage system; the power grid simulation device is used for carrying out voltage transformation according to the received power grid simulation instruction so as to simulate a corresponding power grid voltage state; the energy storage system state acquisition module is used for acquiring the energy storage system state of the energy storage system to be tested from the power supply output end and sending the energy storage system state to the testing device; the testing device is used for determining a testing result of the tested energy storage system according to the state of the energy storage system and the standard operation state corresponding to the power grid simulation instruction. The high-low voltage ride through testing equipment for the energy storage system can fill the blank of power electronic equipment in the field of energy storage system testing.
Description
Technical Field
The application relates to the technical field of energy storage, in particular to high-low voltage ride through testing equipment for an energy storage system.
Background
In recent years, the operation condition of the power grid is more and more complicated, the condition of increasing load demand is more and more prominent, and therefore, the requirement on frequency modulation of the power grid is higher and higher. The current task of frequency modulation is mainly undertaken by a frequency modulation unit. The frequency modulation of the unit has the disadvantages of low speed, delay and the like, so that the load change which is more and more complicated nowadays can not be met, and the defect is just made up by the rising of an energy storage system. The energy storage system can rapidly assist the power grid to complete primary frequency modulation according to load fluctuation, and the running frequency of the power grid is stabilized.
For the condition of sending faults to the power grid, GB/T36548-2018 and GB/T34120-2017 put forward definite requirements on the energy storage system, but equipment for effectively testing the energy storage system is quite lacking nowadays.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present application is proposed to provide an energy storage system high-low voltage ride-through test device that overcomes or at least partially solves the above mentioned problems.
According to one aspect of the application, the high-voltage and low-voltage ride-through test equipment for the energy storage system comprises a power supply input end, a power grid simulation device and a power supply output end which are sequentially connected, and a test device which is in communication connection with the power grid simulation device; the power supply input end is used for connecting a power grid connected as a power supply and supplying the voltage of the power grid to the power grid simulation device; the power supply output end is used for taking the voltage output by the power grid simulation device as simulated power grid voltage to be connected into the energy storage system; the power grid simulation device is used for carrying out voltage transformation according to the received power grid simulation instruction so as to simulate the corresponding power grid state; the energy storage system state acquisition module is used for acquiring the energy storage system state of the energy storage system to be tested from the power supply output end and sending the energy storage system state to the testing device; the testing device is used for determining a testing result of the tested energy storage system according to the state of the energy storage system and the standard operation state corresponding to the power grid simulation instruction.
Optionally, the power grid simulation device includes a sensor module connected to the power output end, and is configured to acquire the state of the energy storage system to be tested according to the sensor module.
Optionally, the sensor module is further connected with a power input end; the power grid simulation device is also used for acquiring the power grid state according to the sensor module.
Optionally, the device further comprises a human-computer interaction device in communication connection with the power grid simulation device, and the power grid simulation device further comprises a controller; and the human-computer interaction terminal is used for generating a corresponding power grid simulation instruction according to the human-computer interaction request and sending the power grid simulation instruction to the controller of the power grid simulation device.
Optionally, the controller is connected with the sensor module, and the controller is further configured to send the state of the energy storage system and/or the state of the power grid acquired by the sensor module to the human-computer interaction device; the human-computer interaction device is also used for receiving and displaying the state of the energy storage system and/or the state of the power grid.
Optionally, the grid simulation instruction is sent based on a Modbus TCP protocol.
Optionally, the testing device is a wave recorder and is configured to draw an actual operation waveform according to the state of the energy storage system, compare the actual operation waveform with a standard waveform corresponding to the power grid simulation instruction, and determine a test result of the energy storage system to be tested according to the comparison result.
Optionally, the energy storage system state includes a voltage value and a current value, and the actual operating waveform includes at least one of a three-phase voltage waveform, a three-phase current waveform, an active power waveform, a reactive power waveform, and a frequency waveform.
Optionally, the grid simulation device is configured to increase the output voltage to a preset multiple of the rated voltage of the measured energy storage system according to the received grid simulation instruction to simulate a grid high-voltage fault and/or a grid low-voltage fault, and/or is configured to simulate a grid three-phase symmetric fault and/or a grid single-phase asymmetric fault and/or a grid two-phase asymmetric fault.
Optionally, the grid simulating device comprises an AC/DC/AC module, and AC-DC-AC conversion is performed according to the AC/DC/AC module to simulate the grid state.
According to the energy storage system high-voltage and low-voltage ride-through test equipment, the voltage state of the power grid can be simulated by using the power grid simulation device according to the received power grid simulation instruction, so that tests on aspects such as high-voltage ride-through and low-voltage ride-through of the energy storage system are completed before the energy storage system is connected with the power grid, the energy storage system is connected with the power grid after the performance of the energy storage system meets the requirement, the safety is improved, and the blank of power electronic equipment in the field of energy storage system test is filled.
The foregoing description is only an overview of the technical solutions of the present application, and the present application can be implemented according to the content of the description in order to make the technical means of the present application more clearly understood, and the following detailed description of the present application is given in order to make the above and other objects, features, and advantages of the present application more clearly understandable.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 shows a block diagram of a high-low voltage ride-through test device of an energy storage system;
FIG. 2 shows an interactive interface schematic for low voltage ride through testing;
fig. 3 shows a schematic of the interface for the high voltage ride through test.
Detailed Description
Exemplary embodiments of the present application will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
Fig. 1 shows a block diagram of an energy storage system high-low voltage ride-through test device, and as shown in fig. 1, the energy storage system high-low voltage ride-through test device 100 includes a power input terminal 110, a grid simulation apparatus 120, and a power output terminal 130, which are connected in sequence, and includes a test apparatus 140 communicatively connected to the grid simulation apparatus 120.
The power input terminal 110 is used for connecting to a power grid connected as a power source to provide a grid voltage to the grid simulating device 120, and the power output terminal 130 is used for connecting the voltage output by the grid simulating device 120 to the energy storage system as a simulated grid voltage.
The grid simulation device 120 is configured to perform voltage transformation according to the received grid simulation instruction to simulate a corresponding grid state; and is used for acquiring the energy storage system state of the energy storage system under test from the power output terminal 130 and sending the energy storage system state to the testing device 140.
Therefore, the voltage is transmitted from the power grid to the power grid simulation device 120 through the power input end 110, and after the voltage is subjected to alternating current-direct current-alternating current conversion, the converted voltage is provided to the energy storage system to be tested through the power output end 130, and the voltage conversion can be specifically voltage increase or voltage decrease.
The testing device 140 is configured to determine a testing result of the energy storage system to be tested according to the state of the energy storage system and the standard operating state corresponding to the power grid simulation instruction.
Specifically, the grid simulation instruction can enable the grid simulation device to simulate various states of grid faults so as to test whether the response condition of the energy storage system meets requirements or national standards, and more specifically, the test object can be an energy storage converter in the energy storage system.
Therefore, the energy storage system high-voltage and low-voltage ride-through test equipment shown in fig. 1 can simulate the voltage state of the power grid by using the power grid simulation device according to the received power grid simulation instruction, so that tests on aspects such as high-voltage ride-through, low-voltage ride-through and the like of the energy storage system are completed before the energy storage system is connected with the power grid, the energy storage system is connected with the power grid after the performance of the energy storage system meets the requirement, the safety is improved, and the blank of power electronic equipment in the field of energy storage system test is filled.
In some embodiments, in the energy storage system high-low voltage ride-through test apparatus, the grid simulator 120 includes a sensor module 121 connected to the power output 130, and is configured to collect the energy storage system state of the energy storage system under test according to the sensor module. In a specific embodiment, the sensor module 121 is also connected to the power input 110; the grid simulator 120 is further configured to collect a grid status according to the sensor module 121.
It can be seen that the connections between the power supply input 110, the power supply output 130 and the grid simulating means 120 may comprise not only circuit connections but also data connections.
Specifically, in some embodiments, the sensor module 121 may contain a voltage transformer and/or a current transformer to collect voltage and/or current on the grid side and/or the energy storage system side. In some embodiments, the energy storage system state includes a voltage value and a current value, and the actual operating waveform includes at least one of a three-phase voltage waveform, a three-phase current waveform, an active power waveform, a reactive power waveform, and a frequency waveform.
In some embodiments, the grid simulating device 120 is configured to increase the output voltage to a preset multiple of the rated voltage of the measured energy storage system according to the received grid simulation command to simulate a grid high voltage fault and/or a grid low voltage fault, and/or to simulate a three-phase symmetric fault and/or a single-phase asymmetric fault and/or a two-phase asymmetric fault. For example, the output voltage is increased to 1.1 times of the rated voltage of the tested energy storage system so as to test the high voltage ride through of the energy storage system.
In some embodiments, grid simulating device 120 includes an AC/DC/AC module 122, which converts AC to DC to AC according to AC/DC/AC module 122 to simulate grid conditions.
In some embodiments, the energy storage system high-low voltage ride-through test apparatus further includes a human-computer interaction device 150 communicatively connected to the grid simulator 120, and the grid simulator 120 further includes a controller 123; and the human-computer interaction terminal is used for generating a corresponding power grid simulation instruction according to the human-computer interaction request and sending the power grid simulation instruction to the controller 123 of the power grid simulation device 120.
The man-machine interaction device can be a mobile phone, a notebook computer and the like, and can realize communication with the controller in a way of pre-installing matched software or logging in a corresponding address and the like. For example, fig. 2 shows an interactive interface diagram of a low voltage ride through test, and fig. 3 shows an interactive interface diagram of a high voltage ride through test, in which a user can configure parameters of a grid simulation instruction, such as a test voltage value and a test duration.
The grid simulation command corresponds to a test scheme, for example, in the schemes shown in fig. 2 and 3, the test can be performed at a plurality of voltages, and the test duration of each voltage can be different. The power grid simulation instruction contains configuration parameters of a test scheme and can also comprise a test mode, and in some embodiments, the power grid simulation instruction is sent based on a Modbus TCP protocol.
In some embodiments, the controller 123 is connected to the sensor module 121, and the controller 123 is further configured to send the energy storage system status and/or the power grid status collected by the sensor module 121 to the human-computer interaction device 150; the human-computer interaction device 150 is further configured to receive and display the energy storage system status and/or the power grid status.
In some embodiments, the testing device 140 is a wave recorder, and is configured to draw an actual operating waveform according to the state of the energy storage system, compare the actual operating waveform with a standard waveform corresponding to the power grid simulation instruction, and determine a testing result of the energy storage system to be tested according to a comparison result.
It should be noted that the waveform drawing and comparing functions of the wave recorder can be implemented by using any one of the prior art, which is not limited in this application.
The following describes a specific use method of the energy storage system high-low voltage ride-through test device in combination with an embodiment.
After the energy storage system high-low voltage ride through testing equipment is started, if the controller does not receive a power grid simulation instruction, three-phase alternating current with unchanged voltage and frequency is output to the energy storage system to be tested through the power output end.
A user can edit a voltage value, duration and the like to be tested through the human-computer interaction device to generate a corresponding power grid simulation instruction, and the corresponding power grid simulation instruction is sent to the controller through the internet access communication based on the Modbus TCP protocol.
After the controller receives a power grid simulation instruction sent by the human-computer interaction device, the AC/DC/AC module 122 is used for performing AC-DC-AC conversion, such as voltage boosting and voltage reduction, and the voltage value and the duration are determined according to the specific power grid simulation instruction.
The voltage transformer and the current transformer collect the voltage and the current of the energy storage system and transmit the voltage and the current to the wave recorder and the human-computer interaction device through the secondary side, and a user can check the voltage and the current through an interaction interface of the human-computer interaction device.
The oscillograph draws corresponding waveforms, such as three-phase voltage waveform, three-phase current waveform, active power waveform, reactive power waveform, frequency waveform and the like, according to the voltage and the current of the energy storage system. And determining whether the response of the energy storage system to the simulated grid fault is expected based on the plotted waveform.
In summary, the energy storage system high-voltage and low-voltage ride-through test equipment designed by the application can simulate the voltage state of the power grid by using the power grid simulation device according to the received power grid simulation instruction, so that tests on aspects such as high-voltage ride-through and low-voltage ride-through of the energy storage system are completed before the energy storage system is connected with the power grid, the energy storage system is connected with the power grid after the performance of the energy storage system meets requirements, the safety is improved, and the blank of power electronic equipment in the field of energy storage system test is filled.
While the foregoing is directed to embodiments of the present application, other modifications and variations of the present application may be devised by those skilled in the art in light of the above teachings. It should be understood by those skilled in the art that the foregoing detailed description is for the purpose of better explaining the present application, and the scope of protection of the present application shall be subject to the scope of protection of the claims.
Claims (10)
1. The energy storage system high-low voltage ride-through test equipment is characterized by comprising a power supply input end, a power grid simulation device and a power supply output end which are sequentially connected, and a test device in communication connection with the power grid simulation device;
the power supply input end is used for being connected with a power grid connected as a power supply and supplying the power grid voltage to the power grid simulation device; the power supply output end is used for taking the voltage output by the power grid simulation device as simulated power grid voltage to be connected into the energy storage system;
the power grid simulation device is used for carrying out voltage transformation according to the received power grid simulation instruction so as to simulate the corresponding power grid state; the energy storage system state acquisition module is used for acquiring the energy storage system state of the energy storage system to be tested from the power supply output end and sending the energy storage system state to the testing device;
and the testing device is used for determining a testing result of the tested energy storage system according to the state of the energy storage system and the standard running state corresponding to the power grid simulation instruction.
2. The energy storage system high-low voltage ride-through test equipment as claimed in claim 1, wherein the grid simulating device comprises a sensor module connected to the power output terminal, and is used for acquiring the energy storage system state of the energy storage system to be tested according to the sensor module.
3. The energy storage system high-low voltage ride-through test device of claim 2, wherein the sensor module is further connected to the power input; the power grid simulation device is also used for acquiring the power grid state according to the sensor module.
4. The energy storage system high-low voltage ride-through test equipment as claimed in claim 2 or 3, wherein the energy storage system high-low voltage ride-through test equipment further comprises a human-computer interaction device in communication connection with the grid simulation device, the grid simulation device further comprising a controller;
and the human-computer interaction terminal is used for generating a corresponding power grid simulation instruction according to the human-computer interaction request and sending the power grid simulation instruction to the controller of the power grid simulation device.
5. The energy storage system high-low voltage ride-through test device of claim 4,
the controller is connected with the sensor module and is also used for sending the energy storage system state and/or the power grid state acquired by the sensor module to the human-computer interaction device;
the human-computer interaction device is also used for receiving and displaying the state of the energy storage system and/or the state of the power grid.
6. The energy storage system high-low voltage ride-through test device according to claim 4, wherein the grid simulation instruction is sent based on a Modbus TCP protocol.
7. The energy storage system high-low voltage ride-through test equipment according to claim 1, wherein the test device is a wave recorder and is configured to draw an actual operating waveform according to the state of the energy storage system, compare the actual operating waveform with a standard waveform corresponding to the power grid simulation instruction, and determine a test result of the energy storage system to be tested according to a comparison result.
8. The energy storage system high and low voltage ride through test device of claim 7, wherein the energy storage system state comprises a voltage value and a current value, and the actual operating waveform comprises at least one of a three-phase voltage waveform, a three-phase current waveform, an active power waveform, a reactive power waveform, and a frequency waveform.
9. The energy storage system high-low voltage ride-through test equipment according to claim 1, wherein the grid simulation device is used for increasing the output voltage to a preset multiple of the rated voltage of the energy storage system to be tested according to a received grid simulation command so as to simulate a grid high-voltage fault and/or a grid low-voltage fault, and/or is used for simulating a grid three-phase symmetric fault and/or a single-phase asymmetric fault and/or a two-phase asymmetric fault.
10. The energy storage system high-low voltage ride-through test equipment as claimed in claim 9, wherein the grid simulation device comprises an AC/DC/AC module, and AC-DC-AC conversion is performed according to the AC/DC/AC module to simulate the grid state.
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| CN202023125975.7U CN214585890U (en) | 2020-12-22 | 2020-12-22 | High-low voltage ride through testing equipment for energy storage system |
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