KR20200040949A - Apparatus for testing performance of energy storage system and method thereof - Google Patents

Abstract

An object of the present invention is to provide a performance testing device of an energy storage system and a method thereof for performing automatic testing based on a performance testing algorithm with respect to a testing item selected through mobile test equipment in order to eliminate the inconvenience of manual testing and testing organization-site separation with respect to energy storage system performance testing. According to the present invention, the performance testing device of an energy storage system includes: mobile test equipment testing the performance of an energy storage system in connection with the energy storage system; a simulation model providing system and energy storage system simulation environments such that independent testing can be performed; a data storage device organizing data generated in the performance testing device and the mobile test equipment; a time synchronization device synchronizing time in connection with the performance testing device and applying time to input and output data; an electric power measuring device measuring and collecting electric power data necessary for performance testing; a wireless control device providing a tester interface for executing performance testing while confirming the state of the energy storage system during the testing through the mobile test equipment; and a testing control unit equipped with a testing algorithm with respect to a performance testing item for automatically executing performance testing with respect to a performance testing item selected from the wireless control device and operating the performance testing device while controlling the mobile test equipment and the energy storage system.

Description

Performance test device and method for energy storage device {APPARATUS FOR TESTING PERFORMANCE OF ENERGY STORAGE SYSTEM AND METHOD THEREOF}

The present invention relates to a performance test apparatus and method of an energy storage device, and more specifically, it is inconvenient to manually perform a performance test on an energy storage system (ESS) by dividing it into a test institution and a site. In order to solve the problem, it relates to a performance test apparatus and a method of an energy storage device that automatically tests a test item selected through a mobile test equipment (MOTES) based on a performance test algorithm.

In recent years, according to the proliferation of development and dissemination of new and renewable energy, electric energy produced through power generation means such as wind power, solar power, tidal power, etc. is stored to secure stable energy for the system of new and renewable energy that shows changes in power generation at every moment. In pursuit of, the function of the battery becomes more and more noticeable.

Accordingly, in order to prevent various circuit malfunctions, device deterioration, or damage that may occur during the charging and discharging stages of the battery, the battery inspection-related device and inspection system for inspecting whether the battery is defective and operating characteristics according to a prescribed scenario Research and development is also being conducted based on various technologies in related industries.

Background art of the present invention is disclosed in Korean Patent Registration No. 1483414 (2014.12.02. Announcement, functional inspection system of battery for energy storage device).

The general configuration of an energy storage system (hereinafter referred to as ESS) is a PMS (Power Management System), an operating system, a PCS (Power Conditioning System) that charges and discharges electricity in connection with the system, and a battery that stores power. Consists of. ESS is a test institute that has test equipment before field installation, and performs performance tests on some items that can be tested by wearing PCS and batteries as parts. After that, it moves to the site and completes the installation, and then performs a field test of the remaining items with test equipment that can be operated on the site.

To date, the test has been carried out in the field of the test institute using large-scale equipment held by the test institute and test equipment that can be moved to the field.The entire process of performance testing such as test progress, data collection, data analysis and judgment All of them are performed manually, so the test period is long and the manpower and test cost are high.

In the case of MW class ESS, it is impossible to move because the size of the test equipment is large, and it is tested by separating the battery and PCS, which are part of the ESS. As such, there is a problem that the test cannot be performed in a fully operable state, which is assembled in the field, and thus there is a limitation of the inspection test.

In addition, in the process of conducting the test, the tester must check the procedure individually and operate the test equipment, which is time consuming and may cause mistakes. And after performing the test, the acquisition and analysis of data from the test equipment is also manually performed. To acquire and analyze the data, the acquired data (Raw Data) is processed, edited, and then made into valid data that can be analyzed. Must go through. In the analysis process, the data is judged through the process of comparing it with the pass data, and finally, the process of writing a report and a report that can be checked by the equipment operator goes through a long time and there is a problem that reliability may be deteriorated.

The present invention has been devised to improve the above problems, and the object of the present invention according to one aspect is to manually perform a performance test for an energy storage device (ESS) by dividing it into a test institution and a site. It is to provide a performance test apparatus and method of an energy storage device that automatically tests based on a performance test algorithm for a selected test item through a mobile test equipment (MOTES) to solve the inconvenience. .

An apparatus for testing the performance of an energy storage device according to an aspect of the present invention includes a mobile test device that tests the performance of an energy storage device in connection with an energy storage device in a mobile type; A simulation model that provides a simulation environment of the system and the energy storage system so that the test can be independently performed; A data storage device that organizes data generated by the performance test device and portable test equipment; A time synchronization device that synchronizes the time with the performance test device and gives time to input / output data; A power measurement device that measures and collects power data necessary to conduct a performance test; A wireless controller providing a tester interface for performing a performance test while checking the state of the energy storage device during the test through the mobile test equipment; And a test control unit that loads a test algorithm for a performance test item to automatically perform a performance test on the performance test item selected from the wireless controller and controls the portable test equipment and energy storage device to operate the performance test device. It is characterized by.

The present invention is characterized in that it further comprises a driving workstation for providing a user with a driving screen of the performance test apparatus.

The present invention is characterized in that it further comprises a maintenance maintenance workstation providing a maintenance maintenance recovery function for the performance test apparatus.

The present invention is characterized in that it further comprises a power supply stabilizer for supplying stable power while operating the mobile test equipment.

In the present invention, the mobile test equipment is connected to the energy storage device to open and close the power supply and distribution switch function; A DC power supply unit connected to the energy storage device to supply DC power; A grid simulator that simulates a power system in connection with an energy storage device and outputs an AC voltage meeting test conditions; RLC load that simulates the load in connection with the energy storage device; And measurement equipment connected to the energy storage device to measure test data.

In the present invention, the measurement equipment is characterized in that it includes at least one of an oscilloscope, an insulation resistance meter and a power analyzer.

In the present invention, the performance test items are insulation resistance test, dielectric strength test, leakage current test, DC side overvoltage and undervoltage protection function test, AC side overvoltage and undervoltage protection function test, frequency rise and fall protection function test, single operation Prevention function test, DC side and AC side inrush current protection function test, DC side and AC side overcurrent protection function test, battery side overcurrent protection function test, input time prevention function test after power recovery, system voltage instantaneous power failure, instantaneous drop test, AC voltage and frequency tracking range test, efficiency test, power factor test, AC output current distortion test, grid voltage sudden change test, grid voltage phase change test, battery overcharge and overdischarge prevention test, round trip test It is characterized by the above.

A performance test method of an energy storage device according to an aspect of the present invention includes: a test control unit confirming a communication state and an initial state of the energy storage device and the mobile test equipment; After the test control unit confirms the communication state and the initial state, switching the energy storage device and the mobile test equipment to the remote control mode; After the test control unit switches to the remote control mode, performing a performance test sequentially by transmitting control commands to the energy storage device and mobile test equipment according to a test algorithm for a plurality of performance test items selected and receiving measurement information; And collecting the measured measurement information by the test control unit and outputting the measurement result.

In the present invention, the step of switching to the remote control mode, the control permission to command any one or more of the operation, stop, emergency stop, target output setting and overcurrent protection level adjustment of the energy storage device when the switch to the remote control mode, It is characterized in that the performance test device is given one or more control rights among the setting of the main parameters of the mobile test equipment, the execution and stop of the main functions.

The step of sequentially performing the performance test in the present invention is characterized in that the test control unit further comprises performing recovery control of the energy storage device whenever the performance test is performed according to a plurality of selected performance test items.

In the present invention, the performance test items are insulation resistance test, dielectric strength test, leakage current test, DC side overvoltage and undervoltage protection function test, AC side overvoltage and undervoltage protection function test, frequency rise and fall protection function test, single operation Prevention function test, DC side and AC side inrush current protection function test, DC side and AC side overcurrent protection function test, battery side overcurrent protection function test, input voltage prevention function test for a certain period of time after power recovery, system voltage instantaneous power failure, instantaneous drop test, AC voltage and frequency tracking range test, efficiency test, power factor test, AC output current distortion test, grid voltage sudden change test, grid voltage phase change test, battery overcharge and overdischarge prevention test, round trip test It is characterized by the above.

The performance test apparatus and method of the energy storage device according to an aspect of the present invention is to resolve the inconvenience of manually performing a performance test for an energy storage device (Energy Storage System; ESS) by dividing it into a test institution and a site. By automatically testing based on performance test algorithm for selected test items through MOTES (Mobile Test Equipment of ESS), it is possible to reduce manpower input, test period and cost for testing, and by ESS It can reduce the stable operation of the system and the cost of power generation, and can be used for performance tests after maintenance of existing facilities.

1 is a block diagram showing an apparatus for testing performance of an energy storage device according to an embodiment of the present invention.
2 is a flow chart for explaining a method for testing the performance of an energy storage device according to an embodiment of the present invention.
3 is a graph showing the progress of the AC-side insulation resistance test in the performance test method of the energy storage device according to an embodiment of the present invention.

Hereinafter, a performance test apparatus and a method of an energy storage device according to the present invention will be described with reference to the accompanying drawings. In this process, the thickness of the lines or the size of components shown in the drawings may be exaggerated for clarity and convenience. In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to a user's or operator's intention or practice. Therefore, the definition of these terms should be made based on the contents throughout the present specification.

1 is a block diagram showing an apparatus for testing performance of an energy storage device according to an embodiment of the present invention.

As shown in Figure 1, the performance test apparatus of the energy storage device according to an embodiment of the present invention, a mobile test equipment 110, a mock model 20, a data storage device 40, a time synchronization device 50 , Test control unit 60, power measuring device 70, wireless control device 90, as well as a driving workstation 10, maintenance maintenance workstation 30, power supply stabilizer 80 may be included. have.

The mobile test equipment 110 may test the performance of the energy storage device 120 in connection with the energy storage device 120 in a mobile type so that the energy storage device 120 can be easily moved and operated to the installation site.

Here, the energy storage device 120 may include a power conditioning system (PCS) 122 that charges and discharges electricity in connection with a system, and a battery 124 that stores power.

In addition, the mobile test equipment 110 is connected to the energy storage device 120 to open and close the power supply and switch function 114, a DC power supply unit 111 for supplying DC power, simulating the power system test conditions It may include a grid simulator 112 for outputting an AC voltage suitable for, RLC load to simulate the load 113, and measurement equipment 115 for measuring test data.

At this time, the measurement equipment 115 may include one or more of an oscilloscope, an insulation resistance meter, and a power analyzer.

The simulation model 20 can provide a simulation environment of the system and the energy storage device 120 so that the test can be independently performed, and can also be used for user education.

The data storage device 40 may have functions such as organizing, storing backup, and restoring data generated by the performance test device and the mobile test equipment 110.

The time synchronization device 50 may synchronize time with a performance test device based on GPS information and give time to input / output data.

The test control unit 60 is equipped with a test algorithm for a performance test item to automatically perform a performance test on the performance test item selected from the wireless controller 90, and the mobile test equipment 110 and the energy storage device 120 You can perform the performance test on the selected performance test item by operating the performance test device while controlling.

In this example, the performance test items that can perform the performance test include insulation resistance test, dielectric strength test, leakage current test, DC side overvoltage and undervoltage protection function test, AC side overvoltage and undervoltage protection function test, and frequency rise And deterioration protection function test, single operation prevention function test, DC side and AC side inrush current protection function test, DC side and AC side overcurrent protection function test, battery side overcurrent protection function test, fixed time input prevention function test after power recovery, system Voltage instantaneous power failure, instantaneous drop test, AC voltage and frequency tracking range test, efficiency test, power factor test, AC output current distortion test, grid voltage sudden change test, grid voltage phase change test, battery overcharge and overdischarge prevention test, round trip (Round Trip) may include any one or more of the test.

The power measuring device 70 may measure and collect power data such as voltage, current, electric power, and phase required to perform a performance test.

The wireless control device 90 is connected to a network through a wireless router 95, and a tester interface for performing a performance test while checking the state of the energy storage device 120 during the test through the mobile test equipment 110 Can provide.

In addition, the driving workstation 10 may provide a driving screen of the performance testing device to the user.

The maintenance cost workstation 30 may provide a maintenance test recovery function for the entire performance test apparatus.

The power supply stabilizer 80 may be installed to supply stable power of about 30 minutes to an hour when an unexpected failure occurs while operating the mobile test equipment 110.

Meanwhile, the mobile test equipment 110 and the energy storage device 120 may access the network through the network hub 100.

The performance test apparatus of the energy storage device made as described above checks the communication state and the initial state of the energy storage device 120 and the mobile test equipment 110 in the test control unit 60, and then the energy storage device 120 and the mobile test equipment ( 110) by switching to the remote control mode, the control authority that can command one or more of the operation, stop, emergency stop, target output setting and overcurrent protection level adjustment of the energy storage device 120, and mobile test equipment 110 The performance test device is given at least one control authority for setting the values of the main parameters, executing and stopping the main functions.

Thereafter, a control command is transmitted to the energy storage device 120 and the mobile test equipment 110 according to a test algorithm for a plurality of performance test items selected through the wireless controller 90, and measurement information is sequentially received to perform performance tests. While performing, it can be stored in the data storage device 40 and analyzed to output measurement results.

As described above, according to the apparatus for testing the performance of an energy storage device according to an embodiment of the present invention, it is inconvenient to manually perform a performance test for an energy storage system (ESS) by dividing it into a test institution and a site. To test the test items selected through the mobile test equipment (MOTES; Mobile Test Equipment of ESS) based on the performance test algorithm automatically, it is possible to reduce labor input, test duration and cost for testing. , Stable system operation by ESS and electricity production cost can be reduced, and it can be used for performance test after maintenance of existing facilities.

Figure 2 is a flow chart for explaining the performance test method of the energy storage device according to an embodiment of the present invention, Figure 3 is an AC side insulation resistance test in the performance test method of the energy storage device according to an embodiment of the present invention It is a graph showing the progress.

As illustrated in FIG. 2, first, in a performance test method of an energy storage device according to an embodiment of the present invention, first, the test control unit 60 communicates and the initial state of the energy storage device 120 and the mobile test equipment 110 Check (S10).

The test controller 60 checks the physical connection state connected to the network through an automatic ping test to check the communication state, and then checks the compatibility state of the hardware (communication module, cable, switching hub), IP collision, communication failure, etc. Thus, if there is a communication error between the energy storage device 120 and the mobile test equipment 110, the Fail signal is transmitted, and if there is no abnormality, the Ready signal is transmitted to the driving workstation 10 and the maintenance maintenance workstation 30.

In addition, if there is no physical abnormality, the communication protocol connection for exchanging data between the server and the client is completed, and when the protocol connection is completed, all defined in the address map between the performance test apparatus and the mobile test equipment 110. Conduct data transmission / reception test of I / O signals (communication loop test), and check whether the defined standard (Resolution, address) is met through data verification.

And when the communication status is finished, initialize the mobile test equipment 110 and the energy storage device 120, receive the current operating status value, and check the initial status to check whether it is possible to switch to the remote mode. do.

Initialization is performed because it may cause malfunction if the normal initial value is not stored in the global variable.

At this time, the initial state of the grid simulator 112 is a normal state (Non-Fault), the CB is a closed state, the nominal three-phase voltage is 440V (tolerance error: ± 5V), and the three-phase frequency is 60Hz (tolerance error: ± 0.1Hz), the three-phase phase is 0˚, -120˚, 120˚ (tolerance: ± 1˚), and the initial state of the PCS 122 is a normal state (Non-Fault) and a stopped state (Stop) ) to be.

Accordingly, the test control unit 60 switches to the remote control mode when the initial conditions are satisfied for the grid simulator 112 of the mobile test equipment 110 and the PCS 122 of the energy storage device 120 after confirming the initial state. (S20).

The initial operation mode of the mobile test equipment 110 is a local mode, which is a manual control mode through its own HMI or device button.

Here, when the remote control mode is switched, the control authority that can command any one or more of operation, stop, emergency stop, target output setting, and overcurrent protection level adjustment of the PCS 122, and main parameters of the grid simulator 112 The performance testing device is given at least one control of setting, executing and stopping the main functions.

After switching to the remote control mode in step S20, the test control unit 60 performs recovery control of the energy storage device 110 each time a plurality of selected performance test items are sequentially performed (S30).

This is a test preparation step that is commonly performed at the starting point of the repetition routine for each test when each performance test item is performed sequentially. Each test is started for a smooth continuous test by performing the SOC management function of the battery 124 Keep the entire SOC within the available range.

Most performance tests are performed with rated discharge operation. Therefore, in the case of a test in which the battery 124 is connected, if a plurality of performance test items are continuously operated, the limit of the range available to the SOC may be reached during the test.

If the SOC of the battery 124 is not monitored by the performance test apparatus, the PCS 122 operation is forcibly stopped by the overcharge or overdischarge protection function at the PCS 122 or battery 124 level, or the driver directly Even if the monitoring is performed, the test is interrupted in the middle and manual charge / discharge operation is required to recover the SOC, making it extremely inefficient and unable to perform the functions of automated continuous operation.

Therefore, it is desirable to perform SOC management before starting each performance test in order to implement smooth continuous test operation without interruption due to SOC.

After performing recovery control of the energy storage device 120 in step S30, the test control unit 60 transmits a control command to the energy storage device 120 and the mobile test equipment 110 according to the test algorithm for the selected performance test item. Then, the measurement information is sequentially received from the measurement equipment 115 such as an oscilloscope, an insulation resistance meter, and a power analyzer to perform a performance test (S40).

Here, the test methods and criteria for performance test items are outlined as follows.

◎ The test method and criteria for automatically conducting the insulation resistance test are as follows.

-Short-circuit the DC-side terminal and the AC-side terminal of the PCS 122, respectively.

-Surge protectors and noise filters can be tested separately.

-Set the measuring equipment 115 to the insulation resistance mode, and if the rated voltage is less than 500V, set the test voltage to 500V, and below 1000V, set the test voltage to 1000V.

-Measure the insulation resistance of the DC terminal and the earthing terminal of the enclosure.

-Measure the insulation resistance of the AC terminal and the ground terminal of the enclosure in the same way.

As illustrated in FIG. 3, when the insulation resistance is measured for 1 minute, when it is 1 MΩ or more, it may be determined as a pass.

◎ The test method and criteria for automatically conducting the dielectric strength test are as follows.

-Short-circuit the DC-side terminal and the AC-side terminal of the PCS 122, respectively.

-Surge protectors and noise filters can be tested separately.

-Set the instrumentation equipment 115 to the commercial frequency withstand voltage mode, and test the AC terminal at 1500V and the DC terminal at (2 × rated voltage + 1000) V.

-Apply the set AC voltage between the DC terminal and the enclosure.

-Apply the set AC voltage between the AC terminal and the enclosure in the same way.

At this time, when the test voltage is applied for 1 minute, it must be able to withstand the dielectric strength to be judged as a pass.

◎ The test method and criteria for automatically conducting the leakage current test are as follows.

-Enter the grid simulator 112 and the DC power supply 111 according to the PCS 122 rating.

-The PCS 122 is operated at rated power.

-Adjust the internal resistance of the leak ammeter to 1kΩ.

-Set the probe type to Enc-Enc.

-Measure leakage current.

At this time, when the leakage current is 5 mA or less, it can be judged as pass.

◎ The test methods and criteria for automatically conducting the DC side overvoltage and undervoltage protection function tests are as follows.

-Enter the grid simulator 112 and the DC power supply 111 according to the PCS 123 rating.

-The PCS 122 is operated at rated power.

-The DC voltage of the DC power supply 111 rises to 95% of the overvoltage protection rating in 5V increments, and then rises in 0.5V increments to measure the protection rating by logging with a power analyzer.

-The DC voltage of the DC power supply unit 111 is dropped to 5% by 105% of the undervoltage protection class, and then lowered by 0.5V, and the protection class is logged with a power analyzer to measure it.

-The DC voltage of the DC power supply 111 is raised to 110% of the overvoltage protection class in the form of a staircase function, and the time at which the PCS stops is measured with an oscilloscope.

At this time, if the result of the protection grade is within the manufacturer's set value of ± 2%, it can be judged as a pass, and if an abnormal voltage is detected and the PCS opens the CB within 0.5 second, it can be judged as a pass.

◎ The test methods and criteria for automatically conducting the AC overvoltage and undervoltage protection function tests are as follows.

-Enter the grid simulator 112 and the DC power supply 111 according to the PCS 122 rating.

-The PCS 122 is operated at rated power.

-The AC voltage of the grid simulator 112 rises up to 95% of the overvoltage protection class in 5V increments, and then rises in 0.5V increments, and the protection rating is measured by logging with a power analyzer.

-The AC voltage of the grid simulator 112 is dropped to 5% by 105% of the undervoltage protection class, and then lowered by 0.5V, and the protection class is measured by logging with a power analyzer.

-The AC voltage of the grid simulator 112 is dropped in the form of a staircase function up to 48% of the undervoltage protection class, and the time at which the PCS 122 stops is measured with an oscilloscope.

-The AC voltage of the grid simulator 112 is lowered to 86% of the undervoltage protection class in the form of a staircase function, and the time at which the PCS 122 stops is measured with an oscilloscope.

-The AC voltage of the grid simulator 112 is raised up to 112% of the overvoltage protection class in the form of a staircase function, and the time at which the PCS 122 stops is measured with an oscilloscope.

-The AC voltage of the grid simulator 112 is raised up to 122% of the overvoltage protection class in the form of a staircase function, and the time at which the PCS 122 stops is measured with an oscilloscope.

At this time, if the overvoltage protection rating result is within 110% ± 2% of the nominal voltage 440V, pass if the undervoltage protection rating result is within 88% ± 2% of the nominal voltage 440V, when adjusting the 49% of the undervoltage protection rating, If the protection operation time is within 0.16 seconds, when passing, when adjusting 96% of the undervoltage protection class, when the protection operation time is within 2 seconds, when adjusting, 112% of the overvoltage protection class, when the protection operation time is within 1 second When adjusting the pass and overvoltage protection rating by 120%, it can be judged as pass if the protection operation time is within 0.16 seconds.

◎ The test methods and criteria for automatically performing frequency rise and fall protection function tests are as follows.

-Enter the grid simulator 112 and the DC power supply 111 according to the PCS 122 rating.

-Rated output operation by discharging PCS (122).

-The frequency of the grid simulator 112 rises to 60.4 Hz in 1 Hz increments, and then rises in 0.05 Hz increments to measure the protection level by logging with a power analyzer.

-The frequency of the grid simulator 112 is dropped to 59.6 Hz in 1 Hz increments, and then, in 0.05 Hz increments, the protection level is logged by a power analyzer and measured.

-The frequency of the grid simulator 112 is increased to 60.6 Hz in the form of a staircase function, and the time at which the PCS 122 stops is measured with an oscilloscope.

-The frequency of the grid simulator 112 is lowered to 59.2 Hz in the form of a staircase function, and the time at which the PCS 122 stops is measured with an oscilloscope.

At this time, if the result of the protection grade is within the manufacturer's set value of ± 2%, it can be judged as a pass, and if the abnormal frequency is detected and the PCS 122 opens the CB within 0.16 seconds, it can be judged as a pass.

◎ The test methods and criteria for automatically conducting the DC and AC inrush current protection function tests are as follows.

-Enter the grid simulator 112 and the DC power supply 111 according to the PCS 122 rating.

-Start the PCS 122.

-Measure the inrush current of the DC side and AC side generated at startup.

-Repeat 3 measurements.

At this time, if the inrush current is less than or equal to the rated current, it can be determined as passing.

◎ The test methods and criteria for automatically conducting DC and AC overcurrent protection function tests are as follows.

-Enter the grid simulator 112 and the DC power supply 111 according to the PCS 122 rating.

-The PCS 122 is operated at rated discharge.

-Change the DC-side overcurrent protection class to 70%.

-The time at which the PCS 122 stops is measured with an oscilloscope.

-Perform the AC overcurrent protection function test in the same way.

At this time, if the overcurrent protection operation time is within 0.5 seconds, it may be determined as pass.

◎ The test methods and criteria for automatically conducting the battery-side overcurrent protection function test are as follows.

-Enter the grid simulator 112 and the DC power supply 111 according to the PCS 122 rating.

-The PCS 122 is operated at rated discharge.

-Change the DC-side overcurrent protection class to 70%.

-The time at which the PCS 122 stops is measured with an oscilloscope.

-Perform the AC overcurrent protection function test in the same way.

At this time, if the overcurrent protection operation time is within 0.5 seconds, it may be determined as pass.

◎ The test methods and criteria for automatically conducting an input prevention function test for a certain period of time after power recovery are as follows.

-Enter the grid simulator 112 and the DC power supply 111 according to the PCS 122 rating.

-The PCS 122 is operated at rated discharge.

-The grid simulator 112 adjusts the AC voltage to 0V to maintain a power failure for 10 seconds after generating a power failure.

-The grid simulator 112 inputs the AC voltage to the rated voltage to restore electricity.

-PCS (122) operation is measured with an oscilloscope.

At this time, if the protection operation time during power failure is within 0.16 seconds, it may be judged as a pass, and if the PCS 122 re-operation suspension is satisfied for 5 minutes after power recovery, it may be determined as a pass.

◎ The test methods and criteria for automatically conducting a grid voltage instantaneous power failure and instantaneous drop test are as follows.

-Enter the grid simulator 112 and the DC power supply 111 according to the PCS 122 rating.

-The PCS 122 is operated at rated discharge.

-The grid simulator 112 is adjusted to generate instantaneous power interruption at 0˚, 45˚, and 90˚ for 0.3 seconds, and the operation of the PCS 122 is measured with an oscilloscope for 5 minutes.

-After adjusting the grid simulator 112 to generate an instantaneous voltage drop of 0.3 seconds at 0˚, 45˚, and 90˚, the operation of the PCS 122 is measured with an oscilloscope for 5 minutes.

At this time, if it stops stably or maintains normal operation, it can be judged as a pass, and if it satisfies the suspension of re-operation of the PCS 122 for 5 minutes after power recovery, it can be judged as a pass.

◎ Test methods and criteria for automatically conducting AC voltage and frequency tracking range tests are as follows.

-Enter the grid simulator 112 and the DC power supply 111 according to the PCS 122 rating.

-The PCS 122 is operated at rated discharge.

-The voltage of the grid simulator 112 rises to + 8% of the nominal voltage in 1V increments. The power analyzer measures power, current total distortion ratio, distortion ratio by order, and power factor.

-The voltage of the grid simulator 112 is dropped to -10% of the nominal voltage in 1V increments. The power analyzer measures power, current total distortion ratio, distortion ratio by order, and power factor.

-The frequency of the grid simulator 112 is increased to 60.45 Hz in 0.05 Hz increments. The power analyzer measures power, current total distortion ratio, distortion ratio by order, and power factor.

-The frequency of the grid simulator 112 is dropped to 59.35 Hz in 0.05 Hz increments. The power analyzer measures power, current total distortion ratio, distortion ratio by order, and power factor.

At this time, it is necessary to maintain stable operation without stopping the PCS 122 protection, and if the total distortion rate is within 5%, within 3% of the distortion rate for each order, and if the power factor is 0.95, it can be judged as a pass.

◎ The test method and criteria for automatically performing the efficiency test are as follows.

-Operate within 20˚ ~ 30˚ ambient temperature.

-Enter the grid simulator 112 and the DC power supply 111 according to the PCS 122 rating.

-The PCS 122 is operated at rated discharge. Efficiency is measured three times at 15 minute intervals with a power analyzer.

-The PCS 122 is operated at rated charging. Efficiency is measured three times at 15 minute intervals with a power analyzer.

At this time, it can be judged as passing if the efficiency value declared by the manufacturer is higher.

◎ The test method and criteria for automatically performing the power factor test are as follows.

-Enter the grid simulator 112 and the DC power supply 111 according to the PCS 122 rating.

-Set the line impedance. (R: 0.24Ω + j0.15Ω S: 0.16Ω + j0.1Ω T: 0.4Ω + j0.25Ω)

-The PCS 122 is operated at rated discharge. Power factor is measured with a power analyzer.

-The PCS 122 is operated at rated charging. Power factor is measured with a power analyzer.

In this case, when the power factor is 0.95 or more during the operation of the charging and discharging modes, it may be determined as passing.

◎ The test method and criteria for automatically conducting AC output current distortion test are as follows.

-Enter the grid simulator 112 and the DC power supply 111 according to the PCS 122 rating.

-Set the line impedance. (R: 0.24Ω + j0.15Ω S: 0.16Ω + j0.1Ω T: 0.4Ω + j0.25Ω)

-The PCS 122 is operated at rated discharge.

-Measure the total distortion rate and the distortion rate for each order with a power analyzer.

At this time, if the total distortion rate of the AC output is within 5% and the distortion rate within each order is within 3%, it can be judged as a pass.

◎ The test method and criteria for automatically conducting the system voltage sudden change test are as follows.

-Enter the grid simulator 112 and the DC power supply 111 according to the PCS 122 rating.

-The PCS 122 is operated at rated discharge.

-Adjust the voltage of the grid simulator 112, rapidly change it to a staircase function up to 108% of the nominal voltage, and hold it for 10 seconds before returning. The operation of the PCS 122 is measured with an oscilloscope.

-Adjust the voltage of the grid simulator 112, rapidly change it to a staircase function up to 90% of the nominal voltage, and hold it for 10 seconds before returning. The operation of the PCS 122 is measured with an oscilloscope.

In this case, if the PCS 122 output is stably maintained by following the voltage even in the case of sudden voltage fluctuation, it may be determined as a pass.

◎ The test method and criteria for automatically conducting the grid voltage phase change test are as follows.

-Enter the grid simulator 112 and the DC power supply 111 according to the PCS 122 rating.

-The PCS 122 is operated at rated discharge.

-Adjust the phase of the grid simulator 112, rapidly change the staircase function from 0˚ to + 10˚, hold it for 10 seconds, and then return. Oscilloscope measures PCS 122 operation

-Adjust the phase of the grid simulator 112, rapidly change the staircase function from 0˚ to -10˚, and hold it for 10 seconds before returning. The operation of the PCS 122 is measured with an oscilloscope.

-Adjust the phase of the grid simulator 112, rapidly change the staircase function from 0˚ to + 120˚ for 10 seconds, and then return. The operation of the PCS 122 is measured with an oscilloscope.

At this time, if the PCS 122 output is stably maintained by following the phase in a sudden phase ± 10 ° fluctuation, it can be judged as a pass, and the PCS 122 output is stably maintained by following the phase in the sudden phase ± 120 ° fluctuation or If a stable protection stop is performed, it can be judged as a pass.

◎ Test methods and criteria for automatically conducting battery overcharge and overdischarge prevention function tests are as follows.

-Enter the grid simulator 112 and the DC power supply 111 according to the PCS 122 rating.

-It operates with rated discharge to the point of overdischarge prevention (minimum SOC limit) set in PCS 122.

-It operates with rated charging up to the point of overcharge prevention (maximum SOC limit) set in PCS 122.

-Check whether the function of overcharge and over-dust is performed.

At this time, if both the overdischarge function is performed at the minimum SOC limit point and the overcharge function is performed at the maximum SOC limit point, it may be determined as a pass.

◎ The test methods and criteria for automatically conducting a round trip test are as follows.

-Discharge to the minimum SOC according to the test standards specified by the manufacturer.

-Charge to the maximum SOC according to the charging conditions specified by the manufacturer. Measure and store the input energy including loss during charging.

-Keep it in Active Standby for 30 minutes.

-Discharge to the minimum SOC according to the discharge conditions specified by the manufacturer. Measure and store the discharge energy. The discharge conditions at this time must satisfy the rated capacity of the ESS (120).

-Keep it in Active Standby for 30 minutes.

-Repeat the process twice. The reference performance test value is the second measurement value excluding the first test result.

-The battery life should not be affected by the capacity measurement test. As a criterion for the capacity test, the output and discharge time (MW-Min) for the rated capacity of the ESS (120) must be checked and meet the specifications.

At this time, if the capacity and efficiency declared by the manufacturer are satisfied, it can be judged as a pass.

The test control unit 60 collects the received measurement information by performing a test according to an algorithm for each performance test item selected in this way, stores it in the data storage device 40, analyzes it, and outputs the measurement result (S50). .

Then, the test control unit 60 determines whether the test for the selected test item is completed (S60).

If the test of the selected test item in step S60 is not completed, the process returns to step S30 and the above process is repeated, and when the test of the test item is completed, the process ends.

As described above, according to the performance test method of the energy storage device according to the embodiment of the present invention, it is inconvenient to manually perform a performance test for the energy storage device (Energy Storage System; ESS) by dividing it into a test institution and a site. To test the test items selected through the mobile test equipment (MOTES; Mobile Test Equipment of ESS) based on the performance test algorithm automatically, it is possible to reduce labor input, test period and cost for testing. , Stable system operation by ESS and electricity production cost can be reduced, and it can be used for performance test after maintenance of existing facilities.

The present invention has been described with reference to the embodiment shown in the drawings, but this is merely exemplary, and those skilled in the art to which the art belongs can various modifications and equivalent other embodiments from this. Will understand.

Therefore, the true technical protection scope of the present invention should be defined by the following claims.

10: driving workstation 20: simulation model
30: maintenance cost workstation 40: data storage device
50: time synchronization device 60: test control unit
70: power measuring device 80: power supply stabilizer
90: wireless control device 95: wireless router
100: network hub 110: mobile test equipment
111: DC power supply 112: grid simulator
113: PLC load 114: switchgear
115: measuring equipment 120: energy storage device
122: PCS 124: battery

Claims (11)

A portable test equipment for testing the performance of the energy storage device in connection with the energy storage device as a portable type;
A simulation model that provides a simulation environment of the system and the energy storage device so that the test can be independently performed;
A performance storage device and a data storage device that organizes data generated by the mobile test equipment;
A time synchronization device that synchronizes time with the performance test device and gives time to input / output data;
A power measurement device that measures and collects power data necessary to conduct a performance test;
A wireless controller providing a tester interface for performing a performance test while checking the state of the energy storage device during a test through the mobile test equipment; And
A test algorithm for the performance test item for automatically performing the performance test for the performance test item selected from the wireless controller is mounted to operate the performance test device while controlling the mobile test equipment and the energy storage device. Test control unit; Performance testing device of the energy storage device comprising a.
The performance testing apparatus of claim 1, further comprising a driving workstation providing a driving screen of the performance testing apparatus to a user.
The performance testing apparatus of claim 1, further comprising a maintenance maintenance workstation providing a maintenance maintenance recovery function for the performance testing apparatus.
The performance test apparatus of claim 1, further comprising a power supply stabilization device for supplying stable power while operating the mobile test equipment.
According to claim 1, The mobile test equipment, Switchgear that is connected to the energy storage device to open and close the power supply and protection function;
A DC power supply unit connected to the energy storage device to supply DC power;
A grid simulator that simulates a power system in connection with the energy storage device and outputs an AC voltage meeting test conditions;
An RLC load simulating a load in connection with the energy storage device; And
It is connected to the energy storage device; measuring equipment for measuring test data; Performance testing device of the energy storage device comprising a.
The performance test apparatus of claim 5, wherein the measurement equipment includes at least one of an oscilloscope, an insulation resistance meter, and a power analyzer.
According to claim 1, The performance test items, insulation resistance test, dielectric strength test, leakage current test, DC side overvoltage and undervoltage protection function test, AC side overvoltage and undervoltage protection function test, frequency rise and fall protection function Test, single operation prevention function test, DC side and AC side inrush current protection function test, DC side and AC side overcurrent protection function test, battery side overcurrent protection function test, input protection function test for a certain period of time after power failure, system voltage instantaneous power failure, Instantaneous drop test, AC voltage and frequency tracking range test, efficiency test, power factor test, AC output current distortion test, grid voltage sudden change test, grid voltage phase change test, battery overcharge and overdischarge prevention test, round trip A device for testing the performance of an energy storage device, characterized in that at least one of the tests is performed.
A test control unit checking a communication state and an initial state of the energy storage device and the mobile test equipment;
After the test control unit checks the communication state and the initial state, switching the energy storage device and the mobile test device to a remote control mode;
After the test control unit switches to the remote control mode, a control command is transmitted to the energy storage device and the portable test equipment according to a test algorithm for a plurality of selected performance test items, and measurement information is received to sequentially perform performance tests. step; And
The test control unit collects and analyzes the received measurement information, and outputs a measurement result. Performance test method of the energy storage device comprising a.
10. The method of claim 8, wherein the step of switching to the remote control mode, when the switch to the remote control mode, the energy storage device operation, stop, emergency stop, target output setting and overcurrent protection level adjustment can be commanded any one or more. A performance test method of the energy storage device, characterized in that the performance test device is given one or more control rights, a value of key parameters of the mobile test equipment, and a control function execution and stop.
The method of claim 8, wherein the sequentially performing the performance test further comprises performing recovery control of the energy storage device whenever the test control unit performs a performance test according to a plurality of selected performance test items. Characterized in that the performance test method of the energy storage device.
According to claim 8, The performance test items, insulation resistance test, dielectric strength test, leakage current test, DC side overvoltage and undervoltage protection function test, AC side overvoltage and undervoltage protection function test, frequency rise and fall protection function Test, single operation prevention function test, DC side and AC side inrush current protection function test, DC side and AC side overcurrent protection function test, battery side overcurrent protection function test, input protection function test for a certain period of time after power failure, system voltage instantaneous power failure, Instantaneous drop test, AC voltage and frequency tracking range test, efficiency test, power factor test, AC output current distortion test, grid voltage sudden change test, grid voltage phase change test, battery overcharge and overdischarge prevention test, round trip Method for testing the performance of an energy storage device, characterized in that at least one of the tests.

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