UPS configuration method and apparatus, and energy storage system

Abstract

The present application discloses a UPS configuration method and apparatus, and an energy storage system. The UPS configuration method comprises: determining first rated peak power on the basis of load power of each load unit in an energy storage system; determining target rated peak power on the basis of the first rated peak power and an overload parameter of a UPS subsystem; and determining a target UPS main unit in the UPS subsystem on the basis of the target rated peak power. The UPS configuration method of the present application can achieve accurate evaluation of the power of the required UPS main unit, so as to implement accurate UPS model selection, thereby improving the stability of the energy storage system and improving operation and maintenance efficiency.

Description

UPS configuration method, device and energy storage system

[0001] The present application claims priority to the Chinese patent application No. 202411320623.7, filed on September 20, 2024, to the Chinese Patent Office, the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of electric power and energy, in particular to a UPS configuration method, device and energy storage system. BACKGROUND

[0003] In the application of large energy storage container battery subsystem (BESS), the container battery subsystem includes multiple battery clusters, fire-fighting equipment, thermal management modules, etc. The multiple battery clusters are connected in parallel to the busbar cabinet and then connected to the energy storage converter DC side. Each battery cluster contains multiple battery packs and a high-voltage box, and a first-level battery management module (BMU) is arranged in the battery pack to collect temperature and voltage information of the battery. The high-voltage box is provided with a second-level battery management module (BCMU) and an electrical circuit, which is responsible for processing battery cluster information and turning on / off the battery cluster circuit. The busbar cabinet is provided with a third-level battery management module (BAMS) and an electrical circuit, which is responsible for processing overall battery system information and turning on / off the battery system circuit to ensure stable operation of the system. TECHNICAL PROBLEM

[0004] In order to ensure that important equipment such as fire-fighting equipment and BAMS in the large energy storage container battery subsystem can be continuously powered in the case of abnormal or power failure of the mains, an uninterruptible power supply system (UPS) is generally provided in the large energy storage container battery subsystem.

[0005] Therefore, the selection of the UPS has an important influence on the operation of the large energy storage container battery system. TECHNICAL SOLUTION

[0006] In a first aspect, the present application provides a UPS configuration method, which is configured as an energy storage system including a UPS subsystem, and the UPS configuration method comprises:

[0007] determining a first rated peak power according to the load power of each load unit in the energy storage system;

[0008] determine a target rated peak power according to the first rated peak power and an overload parameter of the UPS subsystem;

[0009] determine a target UPS host in the UPS subsystem according to the target rated peak power.

[0010] In a second aspect, the embodiments of the present application provide a UPS configuration device, which should be configured as an energy storage system, the energy storage system comprising a UPS subsystem, the device comprising:

[0011] an acquisition unit configured to determine a first rated peak power according to load power of each load unit in the energy storage system;

[0012] a determination unit configured to determine a target rated peak power according to the first rated peak power and an overload parameter of the UPS subsystem;

[0013] the determination unit is further configured to determine a target UPS host in the UPS subsystem according to the target rated peak power.

[0014] In a third aspect, the embodiments of the present application provide an energy storage system, comprising a UPS subsystem and a container battery subsystem, the system comprising: the container battery subsystem configured to acquire load power of each load unit in the energy storage system and transmit to the UPS subsystem; the UPS subsystem configured to determine a first rated peak power according to load power of each load unit in the energy storage system; further configured to determine a target rated peak power according to the first rated peak power and an overload parameter of the UPS subsystem; further configured to determine a target UPS host in the UPS subsystem according to the target rated peak power.

[0015] In a fourth aspect, the embodiments of the present application provide a computer readable storage medium, the computer readable storage medium storing a computer program, the computer program comprising program instructions, the program instructions causing a processor to execute the UPS configuration method of the first aspect when executed by the processor. Advantages

[0016] According to the load power of each load unit in the energy storage system, the first rated peak power is determined, then according to the first rated peak power and the overload parameter of the UPS subsystem, the target rated peak power is determined, and finally, according to the target rated peak power, the target UPS host in the UPS subsystem is determined. Therefore, according to the load power of each load unit in the energy storage system, the first rated peak power of the UPS host in the UPS subsystem can be accurately evaluated and determined, so that the UPS subsystem can more accurately match the actual demand of the energy storage system, avoiding the performance surplus or insufficient caused by improper selection, and further considering the combination evaluation of the first rated peak power and the overload parameter, the stable operation of the UPS subsystem under extreme or unstable conditions can be ensured, thereby ensuring the stable operation of the energy storage system. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 is a schematic diagram of an energy storage system in some embodiments of the present application;

[0018] Fig. 2 is a schematic diagram of a UPS configuration method in some embodiments of the present application;

[0019] Fig. 3 is a schematic diagram of a UPS configuration device in some embodiments of the present application;

[0020] Fig. 4 is a schematic diagram of an energy storage system in some embodiments of the present application. Embodiments of the present application

[0021] Referring to Fig. 1, Fig. 1 is a schematic diagram of an energy storage system provided by an embodiment of the present application, wherein the energy storage system 10 includes a UPS subsystem 20 and a container battery subsystem 30.

[0022] The container battery subsystem 30 is configured to obtain the load power of each load unit in the energy storage system 10 and transmit it to the UPS subsystem 20.

[0023] The UPS subsystem 20 is configured to determine the first rated peak power according to the load power of each load unit in the energy storage system 10, and is further configured to determine the target rated peak power according to the first rated peak power and the overload parameter of the UPS subsystem 10, and is further configured to determine the target UPS host in the UPS subsystem 10 according to the target rated peak power.

[0024] The container battery subsystem 30 includes a three-level battery management module 40.

[0025] The UPS (Uninterruptible Power Supply) subsystem 20 is configured to quickly switch and provide continuous power supply when the main power fails.

[0026] In some implementations, the UPS subsystem 20 includes a UPS host 201 configured to convert direct current to alternating current, and a backup battery 202 configured to provide continuous power supply when the main power is off. The backup battery 202 can be a lead-acid battery or a lithium battery, etc.

[0027] The container battery subsystem 30 is configured to store and release electrical energy to the power grid or directly to the load. The container battery subsystem 30 includes battery clusters, high-voltage boxes, battery collection panels, sensors, fire-fighting equipment, etc.

[0028] The container battery subsystem 30 includes multiple battery clusters, each of which includes multiple battery packs and a high-voltage box. Each battery pack contains multiple battery cells. A primary battery management module (BMU) is provided in the battery pack and is configured to collect temperature and voltage information of the battery. A secondary battery management module (BCMU) and an electrical circuit are provided in the high-voltage box and are configured to process information of the battery cluster and control the electrical circuit of the battery cluster. The battery collection panel (BCP) connects multiple battery clusters in parallel and then connects to the direct current side of the power conversion system (PCS). A tertiary battery management module (BAMS) and an electrical circuit are provided in the battery collection panel and are configured to process battery system information and control the on-off of the battery system circuit.

[0029] The tertiary battery management module 40 is configured for state monitoring, data processing, fault diagnosis, communication interface, alarm and protection. The state monitoring is to monitor the battery status in real time, including voltage, current, temperature, etc. The data processing is to analyze the monitoring data to predict the battery health and life. The fault diagnosis is to detect and diagnose faults in the battery subsystem. The communication interface is to exchange data with the UPS subsystem and other external systems (such as EMS, SCADA). The alarm and protection are to issue an alarm and take protective measures when an abnormal situation occurs.

[0030] There is a physical connection and a communication connection between the UPS subsystem 20 and the container battery subsystem 30. Through the physical connection and the communication connection, the UPS subsystem 20 and the container battery subsystem 30 can work cooperatively, for example, when the power grid is normally powered, the container battery subsystem 30 can charge according to the load condition and the electricity price strategy. When the power grid fails, the container battery subsystem 30 can automatically switch to the UPS mode to provide power through the UPS subsystem 20 to ensure the uninterrupted operation of the key equipment.

[0031] In some implementations, when the power grid is normally powered, the electrical energy stored by the container battery subsystem 30 is delivered to the UPS subsystem 20 through the physical connection (for example, a power transmission line). When the power demand increases or when the power supply is interrupted, the electrical energy provided by the container battery subsystem 30 is replaced by the UPS subsystem 20 to maintain the operation of the key equipment.

[0032] In some implementations, a communication connection is established between the UPS subsystem 20 and the container battery subsystem 30 to exchange state information and control commands. The communication connection includes wired communication and wireless communication. The wired communication can be connected and communicated through an RS485 interface, an Ethernet interface, etc. These interfaces are configured to transmit control commands and system state information such as battery capacity, load demand, system health, etc. The wireless communication can be Wi-Fi or Bluetooth, etc.

[0033] In the related art, when the UPS subsystem 20 is configured, at least the following situations exist: the load power of the container battery subsystem 30 cannot be accurately evaluated, leading to improper selection of the UPS host, causing poor system matching, resulting in increased cost or failure to meet project requirements; the influence of high-altitude areas on the standby time and output power of the UPS subsystem is not fully considered; the life of the backup battery (for example, a lead-acid battery) in the UPS subsystem is not monitored, and the remaining service life of the backup battery cannot be accurately determined, so that the replacement of the backup battery by the operation and maintenance personnel cannot be timely prompted, which may result in the backup battery being unable to provide support at a critical moment, thereby affecting the continuous power supply capability of the UPS subsystem.

[0034] Therefore, the present application provides a UPS configuration method. Please refer to FIG. 2, which is a flowchart of the UPS configuration method provided by the embodiment of the present application. The method comprises the following steps:

[0035] S10, determining a first rated peak power according to the load power of each load unit in the energy storage system.

[0036] Wherein, each load unit is located in the load set of the energy storage system, and the load set refers to the set of all load units that need to be powered in the energy storage system, and the specific location of the load set in the energy storage system is the container battery subsystem.

[0037] The load units can include, but are not limited to, battery clusters, switch cabinets, sensors, and fire-fighting equipment. That is, the load set can include, but is not limited to, battery clusters, switch cabinets, sensors, and fire-fighting equipment.

[0038] The load power of each load unit can be obtained from the technical specification of the equipment or the data provided by the manufacturer, which is not uniquely limited here. The first rated peak power is the rated peak power of the required UPS host in the UPS subsystem when a certain altitude threshold is reached. For example, the altitude threshold can be 5000 meters. The first rated peak power refers to the maximum power demand that the required UPS host in the UPS subsystem can bear when a certain altitude threshold is reached.

[0039] The first rated peak power can be calculated according to the load power of each load unit in the energy storage system and a preset altitude rule.

[0040] In some implementations, determining the first rated peak power according to the load power of each load unit in the energy storage system includes: determining a second rated peak power according to the load power of each load unit; and determining the first rated peak power according to the preset altitude rule and the second rated peak power, wherein the first rated peak power and the second rated peak power represent rated peak powers corresponding to different altitudes, and the altitude corresponding to the first rated peak power is greater than the altitude corresponding to the second rated peak power.

[0041] For example, when the load unit is a battery cluster, a switch cabinet, a sensor, or a fire-fighting equipment, the load power of each load unit can be as shown in Table 1 below:

[0042] Table 1

[0043]

[0044] As shown in the above figure, when the load unit is a switch cabinet, the switch cabinet contains components such as MBMU, HMI display screen, isolating switch, and indicator light, each of which corresponds to its own power, such as W1-W9 in Table 1, which respectively represent the power of the corresponding load. Therefore, the load power corresponding to the switch cabinet is the sum of the powers of all components. By analogy, when the load unit is a battery cluster, the battery cluster contains components such as BMU and high-voltage box (BCMU and control part), and therefore the load power corresponding to the battery cluster is the sum of the powers of all components.

[0045] In Table 1, * represents multiplication.

[0046] The second rated peak power represents the rated peak power of the UPS host corresponding to the reference altitude (assuming below 3000 meters), i.e., the maximum power demand that the UPS host can carry. The load powers of all load units can be added to obtain the total load power of the UPS host required in the UPS subsystem, and the total load power is taken as the second rated peak power. For example, taking the data in Table 1 as an example, the second rated peak power is W10.

[0047] The preset altitude rule can be set as follows: when the altitude is greater than the reference altitude of 3000 meters, the UPS output power decreases by 1% for every 100 meters of increase.

[0048] Further, in determining the first rated peak power according to the preset altitude rule and the second rated peak power, taking the data in Table 1 as an example, the UPS host corresponding to the reference altitude is W10, and assuming that W10 is 1728W, the first rated peak power when reaching a certain altitude threshold (which can be assumed to be 5000 meters) can be calculated according to 1728W and the preset altitude rule, and the first rated peak power is 2073.6W.

[0049] It can be seen that in the embodiment, the power demand of the load unit and the change of the operating environment (such as altitude) are comprehensively considered to ensure that the UPS subsystem can meet the expected power output requirement under different conditions, and further ensure that the entire system can still work stably when all load units are running at the same time, and ensure the uninterrupted operation of the key equipment when the power supply is interrupted or unstable.

[0050] S20, determining a target rated peak power according to the first rated peak power and an overload parameter of the UPS subsystem. The overload parameter describes the acceptable overload degree of the UPS subsystem under the maximum load condition.

[0051] In some embodiments, the overload parameter is expressed in percentage. For example, a certain UPS subsystem may need to be able to handle a load that is 20% higher than its nominal load, and the overload parameter of the UPS subsystem is 20%.

[0052] The overload parameter can be the overload parameter required by the UPS subsystem.

[0053] The target rated peak power is determined according to the first rated peak power and the overload parameter of the UPS subsystem, so as to meet the load capacity requirement of the UPS host. That is, in order to ensure that the UPS host can also stably run under overload, the first rated peak power needs to be adjusted according to the overload parameter to obtain the target rated peak power. The target rated peak power is the power that the UPS host can provide sufficient power supply under normal operation and overload.

[0054] The load capacity requirement of the UPS host can be understood as a power range that the UPS host can stably operate in design, which considers the rated power of the UPS host under normal working conditions and the additional overload capacity.

[0055] It can be seen that in the embodiment, the UPS host can not only meet the load demand under normal working conditions, but also continue to provide stable power support under certain overload conditions, thereby improving the stability and flexibility of the UPS subsystem.

[0056] In some implementations, determining the target rated peak power according to the first rated peak power and the overload parameter of the UPS subsystem includes: determining a target overload power coefficient corresponding to the overload parameter of the UPS subsystem according to a mapping relationship between the overload parameter of the UPS subsystem and a preset overload parameter and overload power coefficient; and obtaining the target rated peak power according to the target power coefficient and the first rated peak power.

[0057] The mapping relationship can be in the form of a table, a chart, or an algorithm, and is configured to convert the overload parameter into the corresponding overload power coefficient. The mapping relationship can be pre-set in a product manual, a technical specification, or a design standard, and maps different overload parameters to specific overload power coefficients.

[0058] The corresponding overload power coefficient is found in the preset mapping relationship according to the overload parameter of the UPS subsystem. This overload power coefficient reflects the additional power capacity that the UPS host needs to have under overload conditions.

[0059] The overload power coefficient indicates the maximum load increase ratio that the UPS can support under this overload parameter. For example, if the mapping relationship indicates that a 20% overload parameter corresponds to an overload power coefficient of 1.2, then 1.2 is the target overload power coefficient.

[0060] If the UPS subsystem needs to be able to handle a load that is 20% higher than its rated power, the target power coefficient corresponding to the overload parameter can be set to 1.2. This indicates that the UPS needs to be able to withstand 120% of the rated load.

[0061] In calculating the target rated peak power that meets the load capacity requirement of the UPS host according to the target power coefficient and the first rated peak power, the overload capacity needs to be considered to offset the instantaneous power consumption, so the first rated peak power needs to be subtracted by the instantaneous power consumption in each load unit to obtain a target difference, and the target difference is multiplied by the target power coefficient to obtain the target rated peak power.

[0062] The target rated peak power = (the first rated peak power - the instantaneous power consumption) * the target power coefficient

[0063] As an example of the data in Table 1, in each load unit in Table 1, the instantaneous power consumption of the disconnecting switch in the busbar cabinet is 450, the target power factor is 1.2, and the first rated peak power is 2073.6W. Therefore, the target rated peak power = (2073.6-450)*1.2, i.e., the target rated peak power is 1948.2W. This means that, after considering the instantaneous power consumption and the overload capacity, the UPS host should be able to provide at least 1948.2W of power to ensure the stability of the system when facing an additional 20% overload.

[0064] It can be seen that, in the embodiment, by considering the load capacity requirement, the target rated peak power that meets the load capacity requirement of the UPS host is obtained according to the overload parameter and the corresponding target overload power factor, so as to ensure that the UPS system not only meets the requirements under normal operating conditions, but also effectively deals with possible overload situations, thereby increasing the stability of the system.

[0065] S30, determining a target UPS host in the UPS subsystem according to the target rated peak power.

[0066] In this embodiment, a UPS host with corresponding or slightly higher output power capacity is selected as the target UPS host according to the target rated peak power. This ensures that the output power of the target UPS host not only meets the current load demand, but also has room to deal with possible expansion or unforeseen additional load.

[0067] In this embodiment, the target UPS host can be set as an online UPS with an accident switching time of 0.

[0068] It can be seen that, in the embodiment, the appropriate UPS host is selected to ensure that the UPS subsystem can work stably when the power grid is normally powered.

[0069] In this embodiment, the first rated peak power of the UPS host in the UPS subsystem is accurately evaluated and determined according to the load power of each load unit in the energy storage system, so that the UPS subsystem can more accurately match the actual demand of the energy storage system, avoiding the performance surplus or deficiency caused by improper selection. Further considering the combination evaluation of the first rated peak power and the overload parameter, the stable operation of the UPS subsystem under extreme or unstable conditions can be ensured, thereby ensuring the stable operation of the energy storage system.

[0070] In some implementations, determining a target UPS host in the UPS subsystem according to the target rated peak power includes: performing UPS host model matching according to the target rated peak power to obtain the target UPS host, and the UPS host model corresponding to the target UPS host has a power greater than or equal to the target rated peak power.

[0071] The UPS host model of the target UPS host corresponds to a power greater than or equal to the target rated peak power, so as to ensure that the UPS can sufficiently support the maximum expected load and leave a certain margin for possible overload situations.

[0072] The UPS host model matching process according to the target rated peak power is as follows: before the selection of the UPS host model, the model information of each UPS host and the output power corresponding to each model are collected and sorted, and all UPS host models with an output power greater than or equal to the target rated peak power are selected according to the target rated peak power.

[0073] It can be seen that in the embodiment, the appropriate UPS host is selected, so as to ensure that the UPS subsystem can work stably when the power grid normally supplies power.

[0074] In some implementations, after determining the target UPS host in the UPS subsystem according to the target rated peak power, the method further includes: determining the target discharge power of each candidate battery corresponding to the target UPS host according to the target rated peak power and the number of battery sections of the candidate battery; determining the discharge duration under the target discharge power according to the target discharge power and the nominal voltage of the candidate battery; and performing battery model matching according to the discharge duration and the target discharge power, to determine the target candidate battery corresponding to the target UPS host, the battery model of the target candidate battery corresponding to the battery parameters matching the discharge duration and the target discharge power.

[0075] In the determination of the target candidate battery, the backup power demand needs to be evaluated and the candidate battery configuration needs to be selected.

[0076] Specifically, the evaluation of the backup power demand is to determine the length of time during which the UPS needs to provide power during a power interruption. This length of time can be determined based on a business continuity plan or the operating requirements of critical equipment. Common backup power requirements vary from a few minutes to a few hours, sufficient to cover most short power interruptions or provide sufficient time for critical business to migrate to backup power.

[0077] Specifically, the selection of the candidate battery configuration can be based on the backup power demand and the specifications of the target UPS host, to select a corresponding candidate battery configuration, indicating the selection of an UPS with a built-in larger capacity battery, an additional battery module or a battery cabinet connected externally, so as to ensure that the backup time requirement can be met.

[0078] The target alternative battery can be set as a lead-acid storage battery. Since the UPS functions to turn on the power supply in an instant of power failure, when the lead-acid storage battery is in a long-time full-charge floating state, it is in the best state, and its cell capacity decays at the slowest speed, and when the power suddenly fails, it is just in the full-charge floating state to cope with it. Due to the memory effect, the performance of the lithium battery will quickly decay when it is in a long-term full-charge floating state. According to the statistics of relevant users, when the lithium battery is in a long-term full-charge state, the temperature is normal, and the capacity will decay by 40% within one year, and after two years, the capacity will greatly decay. In some embodiments, the target alternative battery can also be a lithium battery. In some embodiments, the lithium battery can be calibrated to float to 60% of the maximum capacity to prolong the standby life.

[0079] In some embodiments, the target discharge power of each section of the alternative battery corresponding to the target UPS host can be calculated according to a preset formula based on the target rated peak power and the number of battery sections of the alternative battery. The preset formula is:

[0080] W = target rated peak power * Φ / η / N,

[0081] Wherein, W is the battery section discharge power, Φ is the power factor, η is the inverter efficiency, and N is the number of battery sections.

[0082] In some embodiments, according to the actual load, Φ can be taken as 1; since η is related to the load rate, in this embodiment, it is taken as 0.9; according to the position matching of the energy storage electrical cabin, this embodiment can be set according to two battery packs, 8 battery sections in series and 2 parallel (2P8S), 8 battery sections inside the UPS host, so the final N = 8 + 2 * 16 = 40 battery sections (5P8S).

[0083] In some embodiments, the discharge duration at the target discharge power can be determined according to the target discharge power and the nominal voltage of the alternative battery. The target discharge power and the nominal voltage can be used as query identifiers to query a preset discharge power time table to obtain the discharge duration corresponding to the target discharge power at the nominal voltage. The preset discharge power time table is configured to represent the mapping relationship between the target discharge power, the nominal voltage, and the discharge duration.

[0084] The preset discharge power time table is a database or table established in advance, which records the discharge duration under different combinations of target discharge power and nominal voltage.

[0085] The nominal voltage refers to the ideal, standard voltage value designed by the battery or electrical device under normal operating conditions, marked on the specification book or product label. This voltage value is given by the manufacturer according to the design and expected use conditions of the product, configured to guide consumers or system designers to correctly use and configure electronic devices or batteries. The nominal voltage of a single cell lead-acid battery is 2.0V, which can be discharged to 1.5V and charged to 2.4V; in applications, 6 single cell lead-acid batteries are often connected in series to form a lead-acid battery block with a nominal voltage of 12V, 24V, 36V, 48V, etc.

[0086] The discharge duration indicates the time that the alternative battery can continue to supply power without external power supply.

[0087] According to the calculated discharge duration and target discharge power, the battery model is matched. The battery parameters corresponding to the selected target alternative battery model should be consistent with the calculated discharge duration and target discharge power, to ensure that the battery pack can meet the energy demand of the UPS system during power interruption.

[0088] It can be seen that in the embodiment, the UPS subsystem not only can work stably when the power grid is normally powered, but also can provide sufficient backup power when the power grid is interrupted, supporting the continuous operation of critical equipment until the power is restored or there is enough time for safe shutdown of the equipment. Further, the selection of appropriate UPS host and alternative battery takes into account the nature of the load (such as whether it contains a large amount of inductive or capacitive load), rated power and operating environment conditions (such as temperature, humidity, etc.), to ensure the stability and efficiency of the system.

[0089] In some implementations, according to the target discharge power and the nominal voltage of the alternative battery, the discharge duration under the target discharge power is determined, including: according to the target discharge power, the nominal voltage and a preset discharge power time table, obtaining the discharge duration corresponding to the target discharge power under the nominal voltage, the preset discharge power time table being configured to represent the mapping relationship between the target discharge power, the nominal voltage and the discharge duration.

[0090] In the specific process of obtaining the discharge duration corresponding to the target discharge power under the nominal voltage according to the target discharge power, the nominal voltage and the preset discharge power time table, the target discharge power and the nominal voltage can be set as query identifiers, and the preset discharge power time table can be queried to obtain the discharge duration corresponding to the target discharge power under the nominal voltage, the preset discharge power time table being configured to represent the mapping relationship between the target discharge power, the nominal voltage and the discharge duration.

[0091] The preset discharge power schedule is a database or table that records the discharge duration under different combinations of target discharge power and nominal voltage. The data in the table is usually provided by the battery manufacturer or professional testing institutions, reflecting the comprehensive parameters of battery discharge performance.

[0092] For example, assume that an electrical device requires a target discharge power of 200W, and the nominal voltage of the battery pack is 12 volts. In the preset discharge power schedule, find the row corresponding to the nominal voltage of 12 volts and the discharge power of 200W. The value in this row represents the expected discharge duration of the battery under this working condition.

[0093] As can be seen, in this embodiment, the optimal battery configuration is found through this method, ensuring that the battery can continuously provide sufficient power during the entire required backup power period of the UPS subsystem. At the same time, the appropriate type and quantity of batteries can be selected according to the discharge duration requirement, ensuring the stability and economy of the UPS subsystem, and ensuring that the UPS system can provide sufficient backup power during power interruption, while also optimizing the efficiency and cost-effectiveness of the entire system.

[0094] In some implementations, the method further includes testing the target UPS host and the target backup battery corresponding to the target UPS host to obtain a performance evaluation result of the target UPS host.

[0095] The purpose of testing the target UPS host and the target backup battery corresponding to the target UPS host is to obtain the performance of the target UPS host and its backup battery under different environmental conditions and loads. This is configured to evaluate whether the UPS subsystem can meet specific requirements, such as providing sufficient backup power during power interruption. By systematically testing and recording the results, it can be ensured that the performance of the UPS subsystem in actual application meets the expected standards, providing stable power support for critical equipment and operations. In addition, the performance evaluation result obtained through testing can also reveal potential performance bottlenecks or design flaws of the UPS subsystem, providing a basis for manufacturers or system designers to improve or adjust the product.

[0096] Optionally, in the step of testing the target UPS host and the target backup battery corresponding to the target UPS host to obtain a performance evaluation result of the target UPS host, discharging test is performed on the target UPS host and the target backup battery corresponding to the target UPS host under a preset test environment; when either of the target UPS host and the target backup battery reaches a discharge test termination condition, the current test discharge duration is obtained; and the performance evaluation result of the target UPS host is determined according to the test discharge duration.

[0097] Optionally, in the performance evaluation result of the target UPS host is determined according to the test discharge duration, it is determined whether the test discharge duration is greater than the discharge duration under the target discharge power; if the test discharge duration is greater than or equal to the discharge duration under the target discharge power, it is determined that the target UPS host meets the selection requirement; if the test discharge duration is less than the discharge duration under the target discharge power, it is determined that the target UPS host does not meet the selection requirement.

[0098] The discharge test termination condition is that the target UPS host and the target candidate battery discharge at the same time, and when any one of the electric quantity of the target UPS host and the electric quantity of the target candidate battery is 0, the discharge test termination condition is reached.

[0099] The performance evaluation result can be whether the UPS host meets the selection requirement or the state of the host after the test is completed, which is not limited herein.

[0100] The preset test environment can include but is not limited to altitude, temperature, relative humidity and other environmental factors.

[0101] For example, in an environment of an altitude of 5000 meters (test air pressure value 54kpa), 25℃±2, relative humidity ≤80%, the target UPS host A and the target candidate battery B corresponding to the target UPS host are tested, the host A and the candidate battery B are fully charged at the beginning of the test; after a period of monitoring, it is found that the electric quantity of A is 0 and the electric quantity of B is not 0, at this time, the discharge test termination condition is reached, and the current test discharge duration is 2 hours; assuming that the discharge duration under the target discharge power is 1.5 hours, since the actual measured test discharge duration is 2 hours, which exceeds the theoretical expectation, it can be obtained that A meets the selection requirement.

[0102] It can be seen that in the embodiment, the reliability of the UPS host and the candidate battery under each working condition is further verified through the test, so that stable power support can be provided in actual application, and in the test process, potential conditions of the UPS host or the candidate battery can be found, so that the potential conditions can be found and solved in time to avoid the risk of existing faults.

[0103] In some implementations, the method further includes: acquiring the battery health state corresponding to the target candidate battery in real time; and prompting according to the battery health state of the target candidate battery.

[0104] The energy storage system further includes a third-level battery management module, and in the prompting according to the battery health state of the target candidate battery, the battery health state is transmitted to the third-level battery management module to prompt the battery health state of the target candidate battery. The third-level battery management module is responsible for collecting and analyzing the state data of the battery, including voltage, current, temperature, charging and discharging state, and the health state of the battery.

[0105] The UPS subsystem and the tertiary battery management module are connected in communication to exchange data and information in real time. The connection can be a physical connection (such as a cable) or a network connection (such as Ethernet). In some implementations, the UPS subsystem and the tertiary battery management module can communicate through RS485.

[0106] After the target UPS host and its corresponding target candidate battery are determined, the UPS subsystem monitors the health status of the candidate battery in real time. This includes key parameters such as the charging and discharging efficiency, capacity decay, internal temperature, and voltage of the battery.

[0107] The process of obtaining the battery health status of the target candidate battery in real time is as follows: a communication connection is established between the UPS subsystem and the tertiary battery management module, and the same communication protocol and parameters are configured on the UPS subsystem and the tertiary battery management module, such as the baud rate, data bits, stop bits, and parity bits of RS485; next, the battery management module or similar module in the UPS subsystem monitors the parameters of the target candidate battery in real time, including but not limited to voltage, current, temperature, state of charge (SOC), state of health (SOH), etc.; then, the battery management unit collects the battery health status data at a preset time interval (such as every second or every minute); finally, the collected battery health status data is transmitted to the tertiary battery management module in real time through the established communication connection.

[0108] The battery health status obtained in real time is transmitted to the tertiary battery management module, which analyzes and evaluates the status of the battery in real time and provides prompts to the UPS subsystem or the operator as necessary. These prompts can include that the battery is about to reach its service life, needs to be replaced or maintained, etc.

[0109] As can be seen, in this embodiment, the battery health status of the target candidate battery is monitored to ensure timely response to the health status of the battery and take appropriate measures, thereby ensuring that the UPS subsystem and its candidate battery can operate stably for a long time and improving the overall stability and safety of the system.

[0110] It should be noted that in each embodiment, there is no necessary sequence between each step, and those skilled in the art can understand from the description of the embodiments of the present application that each step in different embodiments can have different execution sequences, i.e., can be executed in parallel, can be exchanged, etc.

[0111] As another aspect of the embodiments of the present application, the embodiments of the present application provide a UPS configuration device. The UPS configuration device can be a software module including a plurality of instructions stored in a memory accessible by a processor to execute the instructions to perform the UPS configuration method described in each embodiment.

[0112] Referring to FIG. 3, FIG. 3 is a structural schematic diagram of a UPS configuration device provided by the embodiments of the present application. The UPS configuration device 300 should be configured as an energy storage system including a UPS subsystem, as shown in FIG. 3, the UPS configuration device 300 includes:

[0113] The obtaining unit 301 is configured to determine a first rated peak power according to the load power of each load unit in the energy storage system;

[0114] The determining unit 302 is configured to determine a target rated peak power according to the first rated peak power and an overload parameter of the UPS subsystem;

[0115] The determining unit 302 is further configured to determine a target UPS host in the UPS subsystem according to the target rated peak power.

[0116] The embodiments of the present application can accurately evaluate and determine the first rated peak power of the UPS host in the UPS subsystem according to the load power of each load unit in the energy storage system, so that the UPS subsystem can more accurately match the actual demand of the energy storage system, and avoid the performance surplus or deficiency caused by improper selection. Further considering the combination evaluation of the first rated peak power and the overload parameter, the stable operation of the UPS subsystem under extreme or unstable conditions can be ensured, thereby ensuring the stable operation of the energy storage system.

[0117] In some implementations, in the determination of the first rated peak power according to the load power of each load unit in the energy storage system, the determining unit 302 is further configured to: determine a second rated peak power according to the load power of each load unit; and determine the first rated peak power according to a preset altitude rule and the second rated peak power, wherein the first rated peak power and the second rated peak power represent rated peak powers corresponding to different altitudes, and the altitude corresponding to the first rated peak power is greater than the altitude corresponding to the second rated peak power.

[0118] In some implementations, in the determining the target rated peak power according to the first rated peak power and the overload parameter of the UPS subsystem, the determining unit 302 is further configured to: determine a target overload power coefficient corresponding to the overload parameter of the UPS subsystem according to a mapping relationship between the overload parameter of the UPS subsystem and a preset overload parameter-overload power coefficient mapping relationship; and obtain the target rated peak power according to the target power coefficient and the first rated peak power.

[0119] In some implementations, in the determining the target UPS host in the UPS subsystem according to the target rated peak power, the determining unit 302 is further configured to: perform UPS host model matching according to the target rated peak power to obtain the target UPS host, wherein a power corresponding to a UPS host model of the target UPS host is greater than or equal to the target rated peak power.

[0120] In some implementations, after the determining the target UPS host in the UPS subsystem according to the target rated peak power, the determining unit 302 is further configured to: determine a target discharge power of each section of the target UPS host corresponding to the alternative battery according to the target rated peak power and the number of battery sections of the alternative battery; determine a discharge duration under the target discharge power according to the target discharge power and a nominal voltage of the alternative battery; and determine the target alternative battery corresponding to the target UPS host according to the discharge duration and the target discharge power, wherein a battery model of the target alternative battery corresponds to battery parameters that are consistent with the discharge duration and the target discharge power.

[0121] In some implementations, in the determining the discharge duration under the target discharge power according to the target discharge power and the nominal voltage of the alternative battery, the determining unit 302 is further configured to: obtain the discharge duration corresponding to the target discharge power under the nominal voltage according to the target discharge power, the nominal voltage, and a preset discharge power schedule, wherein the preset discharge power schedule is configured to represent a mapping relationship between the target discharge power, the nominal voltage, and the discharge duration.

[0122] In some implementations, the UPS configuration apparatus 300 further includes a testing unit 303 configured to: test the target UPS host and the target alternative battery corresponding to the target UPS host to obtain a performance evaluation result of the target UPS host.

[0123] In some implementations, in the determining the target UPS host in the UPS subsystem, the determining unit 302 is further configured to: obtain a battery health status corresponding to the target alternative battery in real time; and perform prompting according to the health status of the target alternative battery.

[0124] It should be noted that the UPS configuration apparatus can execute the UPS configuration method provided by the embodiments of the present application, and has the corresponding function modules and beneficial effects of the execution method. Technical details not described in detail in the UPS selection configuration embodiments can be referred to the UPS configuration method provided by the embodiments of the present application.

[0125] Referring to FIG. 4, FIG. 4 is a structural schematic diagram of an energy storage system provided by the embodiments of the present application. As shown in FIG. 4, the energy storage system 400 includes a processor 401 and a memory 402. The processor 401 is in communication connection with the memory 402.

[0126] The processor 401 is configured to support the energy storage system to perform the corresponding functions in the UPS configuration method in the method embodiments. The processor 401 can be a central processing unit (CPU), a network processor (NP), a hardware chip, or any combination thereof. The hardware chip can be an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The PLD can be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic array logic (GAL), or any combination thereof.

[0127] Specifically, the processor 401 can include a sending card, a receiving card, and a drive chip.

[0128] The memory 402 is configured to store program codes and the like. The memory 402 can include a volatile memory (VM), such as a random access memory (RAM); the memory 402 can also include a non-volatile memory (NVM), such as a read-only memory (ROM), a flash memory, a hard disk drive (HDD), or a solid-state drive (SSD); and the memory 402 can further include a combination of various types of memories.

[0129] The embodiment of the present application further provides a computer readable storage medium, which stores a computer program, and the computer program comprises program instructions, which, when executed by a computer, cause the computer to perform the UPS configuration method according to the foregoing embodiment.

[0130] Those skilled in the art can understand that all or part of the processes in the method embodiments can be completed by a computer program instructing related hardware, and the program can be stored in a computer readable storage medium, and when the program is executed, the processes of each embodiment of the method can be included. The storage medium can be a magnetic disc, an optical disc, a read-only memory (ROM) or a random access memory (RAM), etc.

Claims

1. A method of configuring a UPS, to be configured as an energy storage system, said energy storage system comprising a UPS subsystem, characterized in that, The method comprises: determining a first rated peak power according to load power of each load unit in the energy storage system; determining a target rated peak power according to the first rated peak power and an overload parameter of the UPS subsystem; determining a target UPS host in the UPS subsystem according to the target rated peak power.

2. The UPS configuration method of claim 1, wherein, The determining of the first rated peak power according to the load power of each load unit in the energy storage system comprises: determining a second rated peak power according to the load power of each load unit; determining the first rated peak power according to a preset altitude rule and the second rated peak power, wherein the first rated peak power and the second rated peak power represent rated peak powers corresponding to different altitudes, and the altitude corresponding to the first rated peak power is greater than the altitude corresponding to the second rated peak power.

3. The UPS configuration method of claim 1, wherein, The determining of the target rated peak power according to the first rated peak power and the overload parameter of the UPS subsystem comprises: determining a target overload power coefficient corresponding to the overload parameter of the UPS subsystem according to a mapping relationship between the overload parameter of the UPS subsystem and a preset overload parameter and overload power coefficient; obtaining the target rated peak power according to the target power coefficient and the first rated peak power.

4. The UPS configuration method of claim 1, wherein, The determining of the target UPS host in the UPS subsystem according to the target rated peak power comprises: performing UPS host model matching according to the target rated peak power to obtain a target UPS host, wherein the power corresponding to the UPS host model of the target UPS host is greater than or equal to the target rated peak power.

5. The UPS configuration method of claim 1, wherein, After the determining of the target UPS host in the UPS subsystem according to the target rated peak power, the method further comprises: determining a target discharge power of each candidate battery corresponding to the target UPS host according to the target rated peak power and the number of battery sections of the candidate battery; determining a discharge duration under the target discharge power according to the target discharge power and a nominal voltage of the candidate battery; performing battery model matching according to the discharge duration and the target discharge power to determine a target candidate battery corresponding to the target UPS host, wherein the battery parameters corresponding to the battery model of the target candidate battery are consistent with the discharge duration and the target discharge power.

6. The UPS configuration method of claim 5, wherein, The determining of the discharge duration under the target discharge power according to the target discharge power and the nominal voltage of the candidate battery comprises: obtaining the discharge duration corresponding to the target discharge power under the nominal voltage according to the target discharge power, the nominal voltage and a preset discharge power schedule, wherein the preset discharge power schedule is configured to represent a mapping relationship among target discharge power, nominal voltage and discharge duration.

7. The UPS configuration method of claim 5, further comprising: testing the target UPS host and the target candidate battery corresponding to the target UPS host to obtain a performance evaluation result of the target UPS host. 8.The UPS configuration method of claim 5, further comprising: acquiring a battery health state corresponding to the target candidate battery in real time; prompting according to the health state of the target candidate battery. 9.A UPS configuration apparatus, which should be configured as an energy storage system, the energy storage system comprising a UPS subsystem, the apparatus comprising: an acquisition unit configured to determine a first rated peak power according to load power of each load unit in the energy storage system; a determination unit configured to determine a target rated peak power according to the first rated peak power and an overload parameter of the UPS subsystem; the determination unit is further configured to determine a target UPS host in the UPS subsystem according to the target rated peak power. 10.An energy storage system comprising a UPS subsystem and a container battery subsystem, the system comprising: the container battery subsystem is configured to acquire load power of each load unit in the energy storage system and transmit to the UPS subsystem; the UPS subsystem is configured to determine a first rated peak power according to load power of each load unit in the energy storage system; is further configured to determine a target rated peak power according to the first rated peak power and an overload parameter of the UPS subsystem; is further configured to determine a target UPS host in the UPS subsystem according to the target rated peak power. 11.A computer readable storage medium, the computer readable storage medium storing a computer program, the computer program comprising program instructions, the program instructions causing a processor to execute the UPS configuration method of any one of claims 1-8 when executed by the processor.

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