Power supply control method and device and electronic equipment

Abstract

The invention provides a power supply control method and device and electronic equipment. The method is applied to a power supply control system, the power supply control system comprises a diesel generator and an energy storage assembly, the diesel generator and the energy storage assembly are used for supplying power to a load, and the method comprises the following steps: when commercial power is interrupted, controlling a target battery in the energy storage assembly to supply power to the load; when the target battery in the energy storage assembly supplies power to the load, the use state of the target battery in the energy storage assembly is detected; determining the starting time of the diesel generator according to the use state of the target battery in the energy storage assembly; and starting the diesel generator according to the starting time of the diesel generator, so as to switch the diesel generator in a preset power generation state to supply power to a load after the residual electric quantity of the target battery in the energy storage assembly meets a preset residual electric quantity requirement. The method is used for improving the power supply effect.

Description

Technical Field

[0001] The present application relates to the field of electric power technology, and in particular to a power supply control method, device and electronic equipment. Background Art

[0002] The power supply system is a combination of a series of facilities and equipment designed to meet the power needs of a specific area or facility. The design and operation of the power supply system need to consider factors such as load demand, power supply reliability, and power quality.

[0003] In the prior art, when the mains power is cut off or other problems occur, a backup power supply is generally used to ensure that the corresponding load can operate normally. However, the existing backup power supply has the problem of poor use effect when used. Summary of the invention

[0004] The present application provides a power supply control method, device and electronic equipment to solve the problem of poor use effect existing in the prior art.

[0005] In a first aspect, the present application provides a power supply control method, which is applied to a power supply control system, wherein the power supply control system includes a diesel generator and an energy storage component, and the diesel generator and the energy storage component are used to supply power to a load, and the method includes:

[0006] When the mains power is interrupted, the target battery in the energy storage component is controlled to supply power to the load;

[0007] When the target battery in the energy storage component supplies power to the load, detecting the usage status of the target battery in the energy storage component;

[0008] Determine the start time of the diesel generator according to the usage status of the target battery in the energy storage component;

[0009] According to the start-up time of the diesel generator, the diesel generator is started, and after the remaining power of the target battery in the energy storage component meets the preset remaining power requirement, the diesel generator in the predetermined power generation state is switched to supply power to the load.

[0010] In a possible implementation, controlling a target battery in an energy storage assembly to supply power to a load includes:

[0011] Determine the remaining charge of the batteries in the energy storage assembly;

[0012] Determine a target battery in the battery according to the remaining power of the battery in the energy storage component;

[0013] The target battery in the control battery supplies power to the load.

[0014] In a possible implementation, determining a target battery in the battery according to the remaining power of the battery in the energy storage assembly includes:

[0015] Determine the power demand information of the load and the first initial screening range of the remaining power of the battery in the energy storage component;

[0016] According to the power demand information of the load, a first initial screening range of the remaining power of the battery in the energy storage component is adjusted to obtain a target screening range;

[0017] According to the target screening range and the remaining power of the batteries in the energy storage component, the target battery in the battery is determined.

[0018] In a possible implementation, the energy storage component further includes a monitor;

[0019] When the target battery supplies power to the load, the monitor monitors the target battery in real time;

[0020] If the real-time monitoring result indicates that the target battery has failed, other target batteries or diesel generators in the energy storage assembly are switched to supply power to the load.

[0021] In a possible implementation, the power supply control system further includes a backup diesel generator.

[0022] After starting the diesel generator according to the start time of the diesel generator, and switching the diesel generator in a predetermined power generation state to supply power to the load after the remaining power of the battery in the energy storage component meets the preset remaining power requirement, the method further includes:

[0023] Determine the time the diesel generator supplies power to the load;

[0024] If the time for the diesel generator to supply power to the load meets the preset time requirement, the standby diesel generator is started, and after the standby diesel generator is in a predetermined power generation state, the standby diesel generator is switched to supply power to the load.

[0025] In a possible implementation, when the mains power is normal, the mains power is controlled to charge the battery in the energy storage assembly.

[0026] In a possible implementation, controlling the mains to charge the battery in the energy storage assembly includes:

[0027] According to the operation status of the mains and the remaining power of the batteries in the energy storage components, determine the batteries to be charged, the charge amount of the batteries to be charged, and the charging priority of the batteries to be charged;

[0028] According to the charging priorities of the batteries to be charged, the batteries to be charged are connected to the mains respectively to charge the batteries to be charged.

[0029] In a possible implementation, determining the battery to be charged and the charging priority of the battery to be charged in the battery according to the operation status of the mains and the remaining power of the battery in the energy storage assembly includes:

[0030] According to the operation status of the mains, the initial screening range of the remaining power of the battery in the energy storage component is adjusted to obtain other target screening ranges;

[0031] According to other target screening ranges, determine the batteries to be charged in the battery;

[0032] The charging priority of the battery to be charged is determined according to the relationship between the battery to be charged in the battery and the range boundary values ​​in other target screening ranges.

[0033] In a second aspect, the present application provides a power supply control device, which is applied to a power supply control system. The power supply control system includes a diesel generator and an energy storage component. The diesel generator and the energy storage component are used to power a load. The device includes:

[0034] A first power supply module is used to control the target battery in the energy storage component to supply power to the load when the mains power is interrupted;

[0035] A detection module, used to detect the usage status of the target battery in the energy storage component when the target battery in the energy storage component supplies power to the load;

[0036] A determination module, used to determine the start time of the diesel generator according to the use status of the target battery in the energy storage component;

[0037] The second power supply module is used to start the diesel generator according to the start-up time of the diesel generator, so as to switch the diesel generator in a predetermined power generation state to supply power to the load after the remaining power of the target battery in the energy storage component meets the preset remaining power requirement.

[0038] In a third aspect, the present application provides a power supply control device, including: a memory, a processor;

[0039] Memory stores computer-executable instructions;

[0040] The processor executes the computer-executable instructions stored in the memory, so that the processor executes the above first aspect and / or various possible implementations of the first aspect.

[0041] In a fourth aspect, the present application provides a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement the above first aspect and / or various possible implementations of the first aspect.

[0042] In a fifth aspect, the present application provides a computer program product, including a computer program, which, when executed by a processor, implements the above first aspect and / or various possible implementations of the first aspect.

[0043] The present application provides a power supply control method, device and electronic equipment. When the city power is interrupted, the battery in the energy storage component is first used to power the load, and the start time of the diesel generator is determined according to the usage status of the battery, and the diesel generator is started in advance before this time, so that when switching is required, the diesel generator can directly power the load, thereby improving the power supply reliability and the use effect of the power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0045] Figure 1a A schematic diagram of the structure of a power supply control system provided in this application;

[0046] Figure 1b A schematic diagram of the control system architecture of a microgrid controller provided in this application;

[0047] Figure 2 A flowchart of a power supply control method provided in this application is shown in FIG1 ;

[0048] Figure 3 Schematic diagram of the power supply control method provided in this application Figure 2 ;

[0049] Figure 4 Schematic diagram of the power supply control method provided in this application Figure 3 ;

[0050] Figure 5 A schematic diagram of the structure of a power supply control device provided in this application;

[0051] Figure 6 A schematic diagram of the structure of a power supply control device provided in this application.

[0052] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0053] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0054] First, the terms involved in this application are explained:

[0055] Mains electricity: may refer to the electricity provided by the city's power supply system, which provides electricity to households, commercial and industrial users, usually alternating current;

[0056] Energy storage components: can refer to equipment or technology that can store electrical energy. Energy storage components can store energy when electricity demand is low and release energy when demand peaks.

[0057] Battery State of Charge (SOC): refers to the ratio of the battery's current remaining power to its fully charged state power. The SOC value range is 0% to 100%, where 0% means the battery is fully discharged and 100% means the battery is fully charged. It is used to reflect the battery's remaining capacity and the battery's ability to continue working.

[0058] Depth of Discharge (DOD): It can be used to measure the percentage between the battery discharge amount and the rated capacity of the battery.

[0059] In the prior art, when there is a power outage in the mains, a backup power supply is generally used to ensure the normal operation of the corresponding load. When the existing backup power supply is in use, it is generally powered by a diesel generator to ensure the power supply needs of the load in some scenarios. However, since it takes a certain amount of time to start the diesel generator, when using the diesel generator for power supply, there may be a problem of poor power supply reliability due to the inability to provide uninterrupted power supply to all loads.

[0060] In order to solve the problem of poor power supply reliability in the prior art, the present application provides a power supply control method, device and electronic equipment. When the city power is interrupted, the battery in the energy storage component is first used to power the load, and the start time of the diesel generator is determined according to the usage status of the battery. The diesel generator is started in advance before this time, so that when switching is required, the diesel generator can directly power the load, thereby ensuring the reliability of power supply to the load.

[0061] Figure 1a A schematic diagram of a power supply control system provided in this application, such as Figure 1aAs shown, the scenario of the method can be a power supply control system, which includes an AC bus, an energy storage component and a diesel generator, wherein the AC bus is used for AC collection of AC power sources such as the energy storage component and the diesel generator and power supply of the AC load, and is operated off-grid, so as to power the load; the energy storage component can be connected to the AC bus through a spare interval through an energy storage inverter and an isolation transformer, and a plurality of batteries are arranged in the energy storage component, and the battery can be a solid-state lithium iron phosphate energy storage battery, and the energy storage inverter can select a DC / AC centralized conversion topology in which battery clusters are directly connected in parallel, a DC / AC centralized conversion topology in which battery clusters are controlled by DC / DC, or a DC / AC modular conversion topology configured according to the battery cluster; there are at least two diesel generators, which are directly connected to the AC bus through intervals. In the present application, the power supply control system can control the connection between the energy storage component and the diesel generator and the AC bus in the power supply control system through a switch by a microgrid controller. When the city power is interrupted, the microgrid controller can control the connection between the energy storage component and the AC bus through a switch, so that the battery in the energy storage component supplies power to the load, and can also control the connection between the diesel generator and the AC bus through a switch, so that the battery in the diesel generator supplies power to the load.

[0062] Figure 1b A schematic diagram of the architecture of a microgrid controller provided in this application, such as Figure 1b As shown, the power supply control system architecture of the method can adopt a hierarchical distributed design, which is divided into a coordination control layer and a local control layer. Among them, the coordination control layer mainly includes a microgrid coordination control device, which collects information about energy storage, diesel generators and important loads through communication. When a large disturbance occurs in the microgrid, it coordinates and controls energy storage converters, diesel generators and other equipment to maintain the stable operation of the system. The local control layer mainly includes energy storage converter controllers, diesel generator controllers, etc., and the devices do not rely on communication and have a fast response speed. When a small disturbance or short-circuit fault occurs in the system, the rapid action of the energy storage converter's own regulation or protection can quickly smooth out system fluctuations and restore stable power supply. The characteristics and interfaces of the local control layer equipment are as follows: Energy storage converter controller: mainly used to realize information access and coordinated control of energy storage converters, respond to and execute the control instructions of the microgrid coordination controller, and realize rapid coordinated control of energy storage components. Diesel generator controller: collects the power generation status and information of a single diesel generator unit, and uploads it to the microgrid coordination control device. On the basis of satisfying its own stable operation, it responds to the instructions of the microgrid control system to start or shut down.

[0063] The microgrid controller in the power supply control system in this application combines the advantages of high reliability of distributed control systems and easy expansion of centralized control systems through a hierarchical distributed control system. By effectively coordinating and coordinating between control and protection at different levels, the stable and economical operation of the power supply control system is achieved. The control layer network is redundantly designed, independent of each other, safe and reliable. The high-performance microgrid coordination control device has a millisecond-level response speed and can achieve seamless switching between different operating modes of the microgrid.

[0064] Therefore, in the present application, the microgrid controller in the power supply control system first uses the battery in the energy storage component to power the load, and then determines the start time of the diesel generator according to the battery usage status, and starts the diesel generator in advance before this time, so that when switching is required, the microgrid controller controls the diesel generator to power the load.

[0065] The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0066] Figure 2 A flow chart of a power supply control method provided in this application is shown in FIG. Figure 2 As shown, the method includes:

[0067] S201. When the city power is interrupted, control the target battery in the energy storage assembly to supply power to the load.

[0068] Among them, the mains power outage may refer to an interruption in the power supply system, resulting in a state of power supply suspension. There are many reasons for the mains power outage, including but not limited to sudden failure of the mains power, load overload, etc.

[0069] In this application, when the city power is interrupted, the microgrid controller in the power supply control system collects the upper bus voltage through the microgrid coordination controller, so that when it detects that the bus voltage disappears, it switches the energy storage to VSG mode and controls the energy storage components to establish a voltage source to provide power to important loads.

[0070] Among them, in this application, controlling the target battery in the energy storage component to supply power to the load includes:

[0071] Determine the remaining charge of the batteries in the energy storage assembly;

[0072] Determine a target battery in the battery according to the remaining power of the battery in the energy storage component;

[0073] The target battery in the control battery supplies power to the load.

[0074] The remaining capacity of a battery may refer to the current electrical energy of the battery. In this application, the remaining capacity of a battery may refer to the SOC of the battery. In this application, the SOC of a battery may be estimated by measuring the open circuit voltage (OCV) of the battery, or by recording the amount of charge passed or injected during the battery charging and discharging process, integrating the battery capacity, and thereby estimating the SOC.

[0075] The target battery may refer to a battery in an energy storage component whose remaining power meets an initial screening range, wherein the initial screening range may represent a remaining power range within which the battery can supply power normally.

[0076] Among them, in this application, according to the remaining power of the battery in the energy storage component, determining the target battery in the battery includes:

[0077] Determine the power demand information of the load and the first initial screening range of the remaining power of the battery in the energy storage component;

[0078] According to the power demand information of the load, a first initial screening range of the remaining power of the battery in the energy storage component is adjusted to obtain a target screening range;

[0079] According to the target screening range and the remaining power of the batteries in the energy storage component, the target battery in the battery is determined.

[0080] Among them, the power demand information may refer to the amount of power that the load needs to consume within a certain period of time. After determining the power demand information, it is possible to preliminarily determine which batteries may be suitable for meeting the first initial screening range of the power demand of the above-mentioned load. After determining the first initial screening range, considering the specific conditions in actual applications (for example, the actual working mode of the load, ambient temperature and other influencing factors), the first initial screening range can be adjusted to obtain the target screening range. In this way, a target battery that better meets actual needs can be selected to ensure that it can effectively support the operation of the load without causing waste of resources.

[0081] In some embodiments, the first initial screening range may also refer to a range to avoid problems affecting battery safety and service life when the battery is discharged due to excessively high or low remaining power. In the present application, the remaining power of the battery may be determined according to the battery type, manufacturer regulations, and battery usage requirements.

[0082] For example, the first initial screening range can be determined by constructing a machine learning model based on the battery usage, wherein the training samples of the machine learning model include the performance of the battery in supplying power at various remaining powers, and the battery usage is determined based on the remaining power and the corresponding performance, that is, the remaining power and the corresponding performance are fit, and the battery usage at various remaining powers is determined based on the fitted relationship, and the first initial screening range of the remaining power of each battery is determined based on the usage, wherein, in some embodiments, when the battery usage frequency is less than a preset frequency, the first initial screening range of the battery's remaining power can be enlarged, and when the battery usage frequency is less than or equal to the preset frequency, the first initial screening range of the battery's remaining power can be narrowed.

[0083] In some embodiments, when adjusting the first initial screening range, the voltage change and frequency change of the mains power before and after the interruption may also be referred to.

[0084] In order to better simulate the situation where power is supplied by the mains, the first initial screening range of the remaining power of the battery in the energy storage component can be adjusted according to the voltage and frequency changes of the mains, so that suitable batteries in the energy storage component can be selected for power supply. At the same time, it can also avoid the instability of the mains caused by frequent battery replacement and the problem of short battery life due to frequent battery use.

[0085] For example, the voltage change and frequency change of the mains power can be determined by real-time monitoring of the mains power supply, recording parameters such as power fluctuation and stability, and analyzing the changing trend of the mains power to understand the impact of the mains power supply on the energy storage components. After determining the voltage change and frequency change of the mains power, the first initial screening range of the remaining battery power can be adjusted according to the voltage change and frequency change of the mains power. For example, when the mains power is unstable or fluctuates greatly, the retention range of the remaining battery power can be appropriately increased to cope with emergencies.

[0086] In some embodiments, the AC power data can also be integrated into the existing machine learning model as an additional feature, and the model can be retrained based on the new data features to better predict the remaining battery power and respond to changes in the AC power. The model can then be updated in real time based on changes in the AC power, and the target screening range of the remaining battery power can be dynamically adjusted. The target screening range can be optimized using a machine learning algorithm to ensure battery safety and reliability under AC power fluctuations.

[0087] Among them, in this application, according to the voltage change and frequency change of the mains, the first initial screening range of the remaining power of the battery in the energy storage component is adjusted to obtain the target screening range, including:

[0088] Determine the usage status of the mains power and the load operation status corresponding to the usage status according to the voltage change and frequency change of the mains power;

[0089] According to the usage status of the mains power and the operating status of the load, the initial screening range of the remaining power of the battery in the energy storage component is adjusted to obtain a target screening range.

[0090] The usage status of the mains power may refer to whether the mains power is stable before the mains power is cut off, whether the voltage and frequency are within the normal range, meet the standard requirements, and have no obvious fluctuations.

[0091] The load operation status corresponding to the usage status may refer to the operation status of the load equipment and the system that matches the mains power status.

[0092] Among them, according to the change of the electric energy of the mains, the first initial screening range of the remaining power of the battery in the energy storage component is adjusted, and the process of obtaining the target screening range can also be: through sensors and monitoring equipment connected to the power grid, the state of the mains, including voltage, frequency and continuity of power supply, is monitored in real time. According to the state of the mains and the load operation state corresponding to the use state, the energy storage component evaluates the remaining power of the battery, adjusts its initial screening range, and determines the target screening range. At this time, the target screening range reflects the state of charge and discharge depth level that the battery should maintain under the current mains and load conditions. This range is used to guide the battery management system to manage the charge and discharge of the battery to ensure the service life of the battery and the overall performance of the system.

[0093] Among them, in the present application, since the target screening range of each battery is different, the method for determining the target battery in the battery according to the target screening range may also include:

[0094] Determining a target screening range for each battery and a preferred range within the target screening range;

[0095] Obtaining a battery score according to a preferred range in a target screening range and the number of times the battery has been used;

[0096] Based on the ratings of the cells, the target cells in the battery are determined.

[0097] Among them, the battery score can be satisfied according to the formula:

[0098] Score=w1*a1+w2*a2+w3*a3+w4*a4+w5*a5+w6*a6+w7*a7+w8*a8;

[0099] Among them, a1 represents the absolute deviation of the remaining battery power from the preferred range, a2 represents the relative deviation of the remaining battery power from the preferred range, a3 represents the cycle depth and number of cycles of the battery, a4 represents the number of charge and discharge times of the battery, a5 represents the influence of the battery operating temperature on the performance, a6 represents the internal resistance of the battery, a7 represents the battery voltage stability index, and a8 represents the battery charging efficiency and power loss.

[0100] After determining the scores of the batteries, the batteries are sorted according to the scores, and at least two corresponding batteries are selected as needed.

[0101] In some embodiments, when controlling the target battery to power the load, at least two batteries can be used to power the load. When the remaining power of one of the batteries is outside the preferred range in the target screening range, the other battery can be used to power the load first. When the remaining power of the other battery is outside the preferred range in the target screening range, other batteries can be selected or the last battery in the target screening range can be used to power the load.

[0102] Among them, in the present application, the energy storage component also includes a monitor;

[0103] When the target battery supplies power to the load, the monitor monitors the target battery in real time;

[0104] If the real-time monitoring result indicates that the target battery has failed, other target batteries or diesel generators in the energy storage assembly are switched to supply power to the load.

[0105] Among them, when the target battery fails, other target batteries or diesel generators in the energy storage component can be selected to power the load.

[0106] S202: When the target battery in the energy storage assembly supplies power to the load, detect the usage status of the target battery in the energy storage assembly.

[0107] The usage status of the target battery may refer to how long the target battery can supply power to the load, that is, the time for which the battery can continue to supply power to the load is estimated based on the current SOC of the battery and the power demand of the load.

[0108] S203, determining the start time of the diesel generator according to the usage status of the target battery in the energy storage assembly;

[0109] S204, starting the diesel generator according to the start time of the diesel generator, and switching the diesel generator in a predetermined power generation state to supply power to the load after the remaining power of the target battery in the energy storage component meets the preset remaining power requirement.

[0110] Among them, the start time of the diesel generator can be the time after the target battery usage status meets the preset remaining power requirement, that is, the time before the remaining power of the target battery will not be able to guarantee the power supply demand of the load. Before the remaining power of the target battery will not be able to guarantee the power supply demand of the load, the diesel generator is started in advance and ensured to be in the predetermined power generation state to power the load.

[0111] The predetermined power generation state may refer to a power generation state that meets the load demand. In the present application, the predetermined power generation state may be predetermined or determined according to the power supply demand of the load.

[0112] In some embodiments, when the power supply demand of the load cannot be determined (for example, the power supply demand may change at a specific time), the predetermined power generation state can also be determined based on the changes in electric energy before and after the mains interruption. For example, based on the monitored changes in electric energy before the mains interruption, an algorithm (for example: statistical models, machine learning algorithms, time series analysis methods) can be used to predict future load demands, and based on the load demand, the predetermined power generation state can be determined.

[0113] After the target battery supplies power to the load, when the power generation of the diesel generator matches the change in electric energy, the diesel generator is controlled to supply power to the load, and the target battery stops supplying power to the load. At this time, the power generation of the diesel generator can meet the power demand of the load, so the target battery stops supplying power.

[0114] In the present application, when controlling the target battery to supply power to the load, in addition to controlling the diesel generator to supply power to the load when the diesel generator is in the power generation state, it can also be controlled according to the global remaining power of the battery in the energy storage component. For example, after the global remaining power in the energy storage component is used up to the target remaining power threshold, the diesel generator can be controlled to supply power to the load.

[0115] The present application provides a power supply control method, which sets an initial screening range for the remaining battery power, adjusts the initial screening range according to the change in electric energy, determines a target screening range, and thereby determines a target battery for power supply, thereby minimizing the number of batteries used, and determines the power supply equipment through load demand prediction and judgment of the power status of the diesel generator, thereby improving the power supply efficiency and reducing the working pressure of the battery. After the power supply is completed, the batteries to be charged with a higher priority are preferentially connected to the mains for charging, thereby extending the battery life.

[0116] Figure 3 Schematic diagram of the power supply control method provided in this application Figure 2 ,like Figure 3 As shown, in this embodiment Figure 2Based on the embodiment, a power supply control method is described in detail after starting the diesel generator according to the start time of the diesel generator, so that after the remaining power of the battery in the energy storage component meets the preset remaining power requirement, the diesel generator in a predetermined power generation state is switched to supply power to the load. The method includes:

[0117] S301, determining the time for the diesel generator to supply power to the load.

[0118] The time during which the diesel generator supplies power to the load may refer to the usage time during which the diesel generator supplies power to the load.

[0119] S302: If the time for the diesel generator to supply power to the load meets the preset time requirement, the standby diesel generator is started, and after the standby diesel generator is in a predetermined power generation state, the standby diesel generator is switched to supply power to the load.

[0120] The preset time requirement may refer to the requirement that the diesel generator is about to reach the maximum operating time for supplying power to the load, and the maximum operating time may be preset according to the diesel generator, or may be precisely controlled according to the load demand. The preset time requirement may be adjusted according to the time it takes for the standby diesel generator to reach a predetermined power generation state after starting.

[0121] After the time for the diesel generator to supply power to the load meets the preset time requirement, the standby diesel generator is started, and after the standby diesel generator is in a predetermined power generation state, the standby diesel generator is switched to supply power to the load.

[0122] Figure 4 Schematic diagram of the power supply control method provided in this application Figure 3 ,like Figure 4 As shown, in this embodiment Figure 2 Based on the embodiment, a power supply control method is described in detail, and the method includes:

[0123] S401, when the mains power is normal, according to the operation of the mains power, adjusting the second initial screening range of the remaining power of the battery in the energy storage assembly to obtain other target screening ranges;

[0124] S402, determining the battery to be charged in the battery according to other target screening ranges;

[0125] S403, determining the charging priority of the battery to be charged according to the relationship between the battery to be charged in the battery and the range boundary values ​​in other target screening ranges;

[0126] S404 , connecting the batteries to be charged to the mains respectively according to the charging priorities of the batteries to be charged, so as to charge the batteries to be charged.

[0127] Among them, when the mains power is in a normal state, the energy storage component can also be charged by the mains power. When charging, the charging priority of different batteries can also be determined according to the remaining power of the batteries in the energy storage component.

[0128] For example, after the battery is charged, the upper and lower limits of the battery state of charge (SOC) screening range are adjusted according to the operation of the AC power supply. The batteries to be charged are screened according to the relationship between the power of the batteries to be charged and the boundary value of the screening range to obtain the target batteries to be charged. The target batteries to be charged are sorted in order from small to large power. The battery with the least power is given the highest priority, and the battery with the most power is given the lowest priority.

[0129] The charging sequence is determined according to the priority of the batteries, and the batteries to be charged are connected to the mains in turn to charge the batteries.

[0130] In another feasible embodiment, the priority of charging can be determined according to the current SOC and DOD of the battery. For example, if the SOC of the battery is low, it means that it needs to be charged, and if the DOD of the battery is high, then the battery needs to be charged first because it has been discharged relatively more, and if the DOD of the battery is low, it proves that it has more remaining power and can be charged later.

[0131] The configuration principle of the power supply control system in the power supply control method provided in the present application may include: the energy storage system ratio principle, the diesel generator system ratio principle, wherein the energy storage system ratio principle may refer to that in the grid-connected mode, the energy storage system can smoothly adjust the power exchange with the power grid according to the load change, and use the peak-valley electricity price difference to achieve economic benefits; while in the off-grid state, it can be used as an emergency rapid response power supply, and immediately provide power support when the main power supply fails, ensuring that the critical load is at least 2 hours and the entire load is at least 1 hour of continuous operation, thereby significantly improving the power supply reliability and emergency handling capabilities. Optimizing the application of energy storage through an intelligent energy management system not only improves the efficiency and economy of the system, but also enhances the safety and stability of the overall power supply. In the diesel generator system ratio principle, the diesel generator is a diesel generator that has been put into use, and the diesel generator capacity selection needs to fully consider the working environment and load type. If the selected capacity is too small, it will not be able to carry all the loads or cause a sudden shutdown when starting a high-power load; if the capacity is too large, the investment and maintenance costs are high, and long-term operation under a small load will cause serious carbon deposition on the piston ring and the injector nozzle, increased cylinder wear and other adverse consequences of damaging the unit. The working environment needs to consider multiple factors such as ambient temperature, altitude and relative humidity. When the environment is harsh, the capacity of diesel generators is generally larger than usual. Different types of loads have different requirements for diesel generator capacity. For linear loads, non-linear loads, resistive loads, inductive loads and other types, it is necessary to consider the differences in their starting power and operating power and determine the capacity accordingly.

[0132] In the power supply characteristics of the power supply control system in the power supply control method provided in the present application, there can be two diesel generators, one of which is in operation and the other is in standby, and the mutual standby control of the two machines is realized through the diesel engine parallel controller. The diesel generator system is connected to the AC400V microgrid AC bus and is uniformly controlled by the microgrid energy management system. The diesel generator and controller must be connected to the microgrid energy management system for unified control, and send analog information such as AC side voltage, current, active power, reactive power, and switch quantity information such as switch position, operating status, and alarm signal. In addition, the diesel engine operating parameters can be modified through the microgrid energy management system. The diesel generator can provide stable voltage, frequency and power factor according to the set value, and can realize multiple modes of operation through its own controller, such as stand-alone mode, main and standby mode, etc., which is a high-quality and reliable power supply in the system.

[0133] The energy storage system of the power supply control system in the power supply control method provided in the present application can be a lithium battery energy storage system. The rated output power of the energy storage converter can be set as needed. The lithium battery is placed in a special energy storage system battery cabinet, and the fire protection and BMS systems are integrated. The battery energy storage system is equipped with a BMS system. The energy storage converter and BMS must be connected to the microgrid energy management system for unified control, and send analog information such as the voltage, current, and active power of the battery side and the grid side DC side, as well as switch quantity information such as switch position, operating status, and alarm signal. In addition, the converter operating parameters can be modified through the microgrid energy management system. The energy storage system can realize bidirectional transmission and conversion of power, with high conversion efficiency, and can perform rapid power response when the system needs it, with a response time of less than 100ms. At the same time, it also has an additional control mode as a voltage source when operating off-grid, and has the characteristics of stable discharge voltage, high energy density, and long life. It usually exists as a key element in the microgrid system.

[0134] Among them, lithium-ion batteries can be given priority in energy storage battery selection based on cycle life, energy density, and overall efficiency. In some scenarios where battery safety and life requirements are lower, lead-acid batteries can also be used.

[0135] When selecting a converter for an energy storage system, the topology of the energy storage power conversion unit may be determined first, wherein the topology may include:

[0136] 1. DC / AC centralized conversion topology with direct parallel connection of battery clusters:

[0137] The power conversion unit uses a single centralized DC / AC converter, such as a centralized converter. After the batteries are clustered, they are directly connected in parallel to form a pile through the high-voltage box, and then connected to the DC side of the centralized converter through the DC bus switch, and converted into AC through the centralized DC / AC converter. The high-voltage box is mainly composed of contactors, DC switches, fuses, etc. at the cluster outlet, and also integrates a secondary equipment cluster management unit. Under this topology, power conversion is centrally controlled by a converter, and power conversion is managed by stacks; multiple battery clusters in a stack are directly connected in parallel, and the distribution of stack current in each cluster depends entirely on the potential and resistance size in each cluster, and is naturally distributed; the inconsistent resistance of each cluster leads to current differences, and the cluster with small internal resistance and large current will be fully charged first, and the cluster with large internal resistance and small current will be discharged first, which will produce a barrel effect, resulting in other clusters not being able to fully charge or discharge, causing system capacity loss. In addition, direct parallel connection of multiple clusters will produce a circulating effect. At the same time, when a DC short circuit fault occurs on the DC bus switch system side, the short circuit currents of multiple battery clusters are all collected through the DC bus switch, and the short circuit current is large; when a short circuit fault occurs on the battery side of the cluster switch of the high-voltage box, the short circuit currents of other multiple battery clusters in parallel are all collected through the cluster switch, and the short circuit current is large. In addition, under this topology, faults and routine maintenance within the centralized converter unit will cause multiple clusters to be out of power at the same time, and the outage capacity is large.

[0138] 2. DC / AC centralized conversion topology of battery cluster controlled by DC / DC:

[0139] The power conversion unit uses a single centralized DC / AC converter, such as a centralized converter. After the batteries are clustered, they are not directly connected in parallel, but are connected in parallel through a DC / DC converter, connected to the DC side of the centralized converter through a DC bus switch, and then converted into AC through a centralized DC / AC converter. DC switches, contactors, etc. are set in the DC / DC converter, and cluster management equipment is also provided. Some manufacturers have replaced the DC / DC converter with an intelligent cluster management device containing a DC conversion circuit, which also realizes partial control and management functions of a single cluster. In this topology, power conversion is controlled by a DC / AC converter and multiple DC / DC converters. Power conversion is managed by clusters. Through the regulation and control of the DC / DC converter (or intelligent cluster management equipment), it can ensure that the capacity of each cluster is charged and discharged to the extreme, avoiding the system capacity loss caused by the barrel effect. In addition, cluster management can also avoid parallel circulation. At the same time, when a DC short circuit fault occurs on the DC bus switch system side, the short circuit currents of multiple battery clusters are all collected through the DC bus switch, but are protected and controlled by the DC / DC converter (or intelligent cluster management device), so the short circuit current is not large; when a short circuit fault occurs on the battery side of the cluster switch of the high-voltage box, the short circuit currents of other multiple battery clusters in parallel are all collected through the cluster switch, but are also protected and controlled by the DC / DC converter (or intelligent cluster management device), so the short circuit current is not large. In addition, under this topology, the common part faults and routine maintenance of multiple clusters in the centralized converter will cause multiple clusters to be out of power at the same time, with a large outage capacity; when a single cluster has an internal fault or routine maintenance, the single cluster can be exited through complex control protection, while other clusters continue to operate, with a small outage capacity.

[0140] 3. DC / AC modular conversion topology configured by battery cluster:

[0141] The power conversion unit uses a modular DC / AC converter configured in clusters. After the batteries are clustered, they are not connected in parallel, but directly converted into AC through the DC / AC converter. One cluster is a pile. DC switches, contactors, etc. are set in the DC / AC converter, and cluster management equipment is also provided. In this topology, the power conversion is controlled separately by the DC / AC converter configured in each cluster. Cluster management can ensure that the capacity of each cluster is charged and discharged to the extreme, avoiding the system capacity loss caused by the barrel effect. In addition, cluster management can also avoid parallel circulation. In this topology, the DC side is not connected in parallel, and the DC short-circuit current is limited to the short-circuit current of a single cluster. For example, after 280Ah batteries are connected in series to form a cluster, the cluster DC short-circuit current is about 10kA. The switch selection is easy, and there is no risk of short-circuit protection on the DC side. In this topology, the distributed converter acts as an independent power management unit. Internal faults and routine maintenance do not affect the operation of other clusters. The power outage capacity is small and the system operation and maintenance availability is high.

[0142] The control strategy of the microgrid controller provided in this application is reflected in the off-grid operation state when the mains power disappears. During off-grid operation, the microgrid coordination control device adjusts the energy storage charging and discharging and the start and stop of the diesel generator according to the changes in voltage and frequency in the system through a fast control network, thereby achieving real-time power balance of the off-grid microgrid system and improving the power supply stability and sustainability of the microgrid system.

[0143] Among them, the control strategy of the microgrid controller in the off-grid state includes:

[0144] 1. Frequency and voltage emergency control: In order to cope with the rapid changes in frequency and voltage caused by power shortage or surplus, and avoid affecting the normal operation of the load in the microgrid or even causing the system to crash, the power demand in the microgrid is balanced by controlling the energy storage output, so that the frequency and voltage are restored to the allowable operating range.

[0145] 2. Black start: When the microgrid is completely black, it can use its own micro-source to boost voltage from zero and smoothly restore system power supply. The specific steps are:

[0146] Disconnect the local load in the microgrid to ensure that the black start power supply starts in a no-load state. It is also necessary to consider the power supply problem of each part of the black start control system. Configure a certain amount of uninterruptible power supply or have a reliable temporary external power supply to power key parts such as controllers, switches, energy storage battery cluster switches and other power supply equipment;

[0147] Select a black start power source. The selection principles include the ability to regulate voltage and frequency, energy storage units with sufficient backup capacity, and sufficient power generation;

[0148] Start the black start power supply. When the energy storage is used as the black start power supply, the voltage is increased from zero to establish a stable power supply;

[0149] Increase the local load of the microgrid. According to the load capacity of the microgrid, add local load accordingly to complete the black start process.

[0150] 3. Energy storage battery SOC management: In order to ensure the safe and stable off-grid operation of the microgrid, it is necessary to ensure the normal operation of key power sources in the microgrid. For microgrid systems that are equipped with energy storage and act as a system voltage source, it is necessary to ensure that the energy storage has a certain SOC (remaining power percentage). If the SOC is too high, the energy storage cannot be charged. In the case of excess system power, the system frequency increases, and the equipment trips at an excessive frequency; if the SOC is too low, the energy storage cannot be discharged. In the case of insufficient power, the system frequency decreases, and the equipment trips at a low frequency. Therefore, it is necessary to use the microgrid coordination control device to adjust the energy storage power in real time according to the energy storage power and power, power output, and load operation conditions, transfer the energy storage power, maintain the energy storage power and power within a certain range, and ensure that the energy storage has a certain spare capacity and appropriate power.

[0151] The control modes of the power supply control system in this application may include virtual synchronous diesel generator control mode (VSG control), frequency and voltage regulation control mode (VF control), power control mode (PQ control), etc. Among them, in the energy storage system control mode, when the diesel generator is the main power source, the energy storage system adopts the power control mode to control the power direction according to its own power situation; if the diesel generator needs to be shut down, the energy storage system adopts the virtual synchronous diesel generator control mode to maintain the voltage and frequency of the system according to the load situation. In the diesel generator control mode, the diesel generator has a frequency and voltage regulation control mode and is used as a voltage source.

[0152] The system operation mode of the power supply control system in the present application can be that when the mains power source of the system disappears, since it takes a long time to directly switch to the diesel generator for power supply, the microgrid coordination controller is used to collect the upper bus voltage. When the bus voltage disappears, the energy storage is switched to the VSG mode, and the voltage source is established by the energy storage to provide power to important loads. If the diesel generator meets the operating conditions, the operator can manually control the microgrid controller button to switch to the diesel generator mode: first disconnect the diesel generator parallel switch, start the diesel generator to run at no load, and the microgrid controller collects the diesel generator outlet and the 400V load bus voltage to determine whether to close the diesel generator switch at the same time. The energy storage can maintain the VSG operation mode or switch to the PQ mode. If the diesel generator itself has the function of synchronous grid connection, the switch is kept closed. In the diesel generator mode, the energy storage can control the charging and discharging according to its own battery power. When the diesel generator has been running for too long and there may be an exposure risk, the operator can manually control the microgrid controller button to switch to energy storage mode: the energy storage is switched from PQ mode to VSG mode. At this time, the diesel generator shutdown command can be directly sent, and the diesel generator can be disconnected and connected to complete the switch.

[0153] Among them, the process of power conversion in the power supply control system can be: 1. Mains operation: the load is entirely borne by the mains. After the PCS charges the battery to the specified SOC at the specified power, it switches to hot standby mode. 2. Mains to energy storage: When the mains is in operation, the operator manually controls the microgrid controller button to switch to energy storage mode, or manually opens the grid connection point switch, and the PCS switches to VSG operation. 3. Energy storage with load: The grid connection point switch is in the open position, the PCS operates in the VSG state, and the load is entirely borne by the energy storage.

[0154] 4. Energy storage to diesel generator: When the energy storage is under load, the ATS position is set to the diesel generator side, and the operator manually controls the microgrid controller button to switch to the diesel generator mode, and sends a start command to the diesel generator. After the diesel generator starts, the microgrid controller checks the synchronization, merges the network switch, and the diesel generator and energy storage run in parallel. 5. Diesel generator with load: When the diesel and storage are in parallel operation, the load is entirely borne by the diesel generator. After the PCS charges the battery to the specified SOC at the specified power, it switches to hot standby state. 6. Diesel generator to energy storage: When the diesel and storage are in parallel operation, the operator manually controls the microgrid controller button to switch to energy storage mode, or manually opens the grid connection point switch, and the PCS switches to VSG operation. 7. Energy storage to mains: When the energy storage is under load, after the mains power is normal, the ATS position is set to the mains side, the grid connection point switch is open, and the operator manually controls the microgrid controller button to switch to mains mode, checks the synchronization, and merges the network switch PCS to PQ operation.

[0155] In order to solve the problem of manual power-on when the city power is cut off, a microgrid emergency power supply energy storage system can also be connected to the system. Among them, the PCS cabinet mainly realizes the following functions: using the converter of the virtual synchronous diesel generator, the PCS can operate in both grid-connected mode and off-grid mode, and can realize planned seamless switching between grid-connected and off-grid conditions. Among them:

[0156] During grid-connected operation: on the one hand, the battery charging and discharging operations can be realized through power control instructions; on the other hand, by simulating the primary frequency regulation, inertia support, and excitation voltage regulation characteristics of the synchronous diesel generator, when interference occurs, the converter will immediately increase or decrease its output power to balance the load and maintain the stability of voltage and frequency. There is no significant delay between the change in output power and the change in frequency, and the response speed to emergencies is significantly accelerated, which can prevent system frequency changes before triggering machine cutting / load reduction.

[0157] When switching between grid-connected and off-grid: The converter based on virtual synchronous diesel generator control has external characteristics comparable to synchronous diesel generators. In planned or unplanned islanding, after the grid is cut off, the virtual synchronous diesel generator still maintains the initial state when connected to the grid (virtual diesel generator potential and phase), and no obvious transient process will occur during the switching process of the grid-connected and off-grid modes. Therefore, seamless (unplanned failure probability) and smooth switching of the grid-connected and off-grid modes can be achieved naturally.

[0158] When operating off-grid: PCS operates without the main power grid, providing stable voltage and frequency support for the load. In this mode, it is necessary to ensure that the power of the load does not exceed the capacity range of the PCS and the battery.

[0159] During the off-grid / grid switching: During the off-grid to grid switching process, when the virtual synchronous diesel generator is in off-grid operation, due to the voltage and frequency regulation, there will be a certain deviation between its operating voltage amplitude and frequency and the real value of the grid. As time accumulates, the amplitude and phase between the microgrid voltage and the grid voltage will deviate. Putting the microgrid into the grid at an inappropriate time of grid connection may cause excessive impact current, resulting in off-grid / grid failure. It is necessary to achieve the grid connection of the converter through a pre-synchronization (quasi-synchronous closing) link similar to the traditional synchronous diesel generator before grid connection. Different from the traditional synchronization scheme, NR adopts key state memory, voltage source grid connection stabilization and other technologies to achieve smooth switching between off-grid and grid connection, without the need to phase-lock the grid voltage, easy to implement, high synchronization accuracy and fast speed.

[0160] When there are multiple PCS converters, the coordinated control system communicates quickly at the millisecond level and has the function of simultaneously starting from zero and boosting the voltage of multiple machines. The start-up time can be set online, and the power oscillation problem of multiple machines in parallel is solved.

[0161] When multiple VSG machines are controlled in parallel + multiple auxiliary controls are used: the operation mode is switched seamlessly, the frequency and voltage regulation are actively participated in, the system damping and inertia are increased, and the dynamic and steady-state processes of multiple machines in parallel achieve balanced power distribution, avoiding oscillation and reducing impact.

[0162] The PCS cabinet in this application can adopt the AC and DC side self-powering mode. The working power of the battery cabinet is taken from the UPS power.

[0163] The main components of the monitoring and communication system of the PCS cabinet are the monitoring host and 485 / high-speed optical fiber communication terminal, which can upload information to the superior monitoring system in real time through the Ethernet communication terminal.

[0164] The monitoring and communication system of the PCS cabinet can collect and process data such as telesignaling, telemeasurement, remote control, and remote regulation. The monitoring and communication system of the PCS cabinet can process the collected real-time data and send it to the real-time database. It can also process other data (such as management information, operation information) as needed (scale conversion or limit check, etc.) and store them in the corresponding database.

[0165] The microgrid coordination control device of the microgrid controller in the present application can be used as a flexible interface between the energy storage battery and the power grid to realize the bidirectional flow of energy between the AC system and the DC system, wherein the microgrid coordination control device can: 1. Convert DC power into AC power consistent with the requirements of the power grid in the installed area, supply it to the local load or feed it into the power grid; 2. Provide a CAN or Ethernet interface to realize real-time communication with the battery management system (BMS), and accurately monitor the current battery operation information. It can not only control the charging and discharging state of the converter, but also easily switch to a variety of charging and discharging modes such as constant current, constant voltage or constant power, so as to realize the charging and discharging control of the battery with the most optimized strategy. 3. It can realize energy exchange with the power grid in the grid-connected operation mode, and can also serve as the main power supply to support the off-grid operation in the isolated grid operation mode. The two operation modes can be switched freely. 4. According to the grid voltage information monitored online, the output voltage of the converter is controlled in real time and accurately, which can eliminate static and dynamic errors and realize impact-free grid connection. 5. By integrating the harmonic online monitoring function, there is no need to set up an independent data acquisition unit. By sharing data through the communication bus and adding an independent harmonic analysis software module, all analysis data calculation functions can be completed to improve the power supply effect. 6. The scope of self-test covers control systems, power modules, buses and other related equipment. The self-diagnosis cycle ensures that internal faults in the system are detected within 1ms, and corresponding lock trigger pulses or trip responses are made. Various perfect relay protection functions effectively ensure the safe operation of the converter. 7. When the converter fails or detects an external system fault, it can continuously record the signals before and after the fault for a period of time, so that fault analysis can be performed.

[0166] The monitor provided in the present application may include a smoke detector, a temperature control detector, and an audible and visual alarm. In addition, a perfluorohexanone fire extinguishing device corresponding to the monitor may be provided. When a fire occurs, after receiving an electric start signal or an open flame ignites the thermistor, the electric initiator or the thermistor burns and activates the perfluorohexanone generator in the fire extinguishing device. The heat released by the oxidation-reduction reaction of the perfluorohexanone generator decomposes the chemical coolant, so that the perfluorohexanone generator and the coolant jointly participate in the fire extinguishing.

[0167] In the present application, when a fire occurs due to thermal runaway of a battery cell or a short circuit of an electronic component, when the combustible gas detector detects 25% of the lower limit of the explosion concentration of the combustible gas, it outputs a dry contact signal to the EMS for fire determination; when the smoke detector detects a fire, it outputs an electrical signal, activates the sound and light alarm to notify personnel to take action; when the smoke and temperature detectors detect a fire at the same time, they output an electrical signal, link the sound and light alarm, activate the fire extinguishing device, implement fire extinguishing, and synchronously output a feedback signal to the EMS to notify personnel to take timely action.

[0168] Figure 5 A schematic diagram of the structure of a power supply control device provided in this application, such as Figure 5 As shown, the power supply control device 50 provided in this embodiment includes: a first power supply module 501, a detection module 502, a determination module 503, and a second power supply module 504.

[0169] The first power supply module 501 is used to control the target battery in the energy storage assembly to supply power to the load when the city power is interrupted;

[0170] A detection module 502 is used to detect the usage status of the target battery in the energy storage component when the target battery in the energy storage component supplies power to the load;

[0171] A determination module 503 is used to determine the start time of the diesel generator according to the use status of the target battery in the energy storage component;

[0172] The second power supply module 504 is used to start the diesel generator according to the start-up time of the diesel generator, so as to switch the diesel generator in a predetermined power generation state to supply power to the load after the remaining power of the target battery in the energy storage component meets the preset remaining power requirement.

[0173] In a possible implementation, the first power supply module 501 may also be used for:

[0174] Determine the remaining charge of the batteries in the energy storage assembly;

[0175] Determine a target battery in the battery according to the remaining power of the battery in the energy storage component;

[0176] The target battery in the control battery supplies power to the load.

[0177] In a possible implementation, the first power supply module 501 may also be used for:

[0178] Determine the power demand information of the load and the first initial screening range of the remaining power of the battery in the energy storage component;

[0179] According to the power demand information of the load, a first initial screening range of the remaining power of the battery in the energy storage component is adjusted to obtain a target screening range;

[0180] According to the target screening range and the remaining power of the batteries in the energy storage component, the target battery in the battery is determined.

[0181] In a possible implementation, the first power supply module 501 may also be used for:

[0182] When the target battery supplies power to the load, the monitor monitors the target battery in real time;

[0183] If the real-time monitoring result indicates that the target battery has failed, other target batteries or diesel generators in the energy storage assembly are switched to supply power to the load.

[0184] In a possible implementation, the second power supply module 504 may also be used for:

[0185] Determine the time the diesel generator supplies power to the load;

[0186] If the time for the diesel generator to supply power to the load meets the preset time requirement, the standby diesel generator is started, and after the standby diesel generator is in a predetermined power generation state, the standby diesel generator is switched to supply power to the load.

[0187] In a possible implementation, the second power supply module 504 may also be used to: when the mains power is normal, control the mains power to charge the battery in the energy storage assembly.

[0188] In a possible implementation, the second power supply module 504 may also be used to: determine the battery to be charged, the charge amount of the battery to be charged, and the charging priority of the battery to be charged according to the operation status of the mains and the remaining power of the battery in the energy storage component;

[0189] According to the charging priorities of the batteries to be charged, the batteries to be charged are connected to the mains respectively to charge the batteries to be charged.

[0190] In a possible implementation, the second power supply module 504 may also be used to: adjust the initial screening range of the remaining power of the battery in the energy storage assembly according to the operation status of the mains power to obtain other target screening ranges;

[0191] According to other target screening ranges, determine the batteries to be charged in the battery;

[0192] The charging priority of the battery to be charged is determined according to the relationship between the battery to be charged in the battery and the range boundary values ​​in other target screening ranges.

[0193] A power supply control device provided in this embodiment can execute the method provided in the above method embodiment. Its implementation principle and technical effect are similar, and this embodiment will not be described in detail here.

[0194] Figure 6 This is a schematic diagram of the structure of a power supply control device provided in this application. Figure 6 As shown, the electronic device 60 provided in this embodiment includes: at least one processor 601 and a memory 602. Optionally, the device 60 also includes a communication component 603. The processor 601, the memory 602 and the communication component 603 are connected via a bus 604.

[0195] In a specific implementation process, at least one processor 601 executes the computer execution instructions stored in the memory 602, so that at least one processor 601 executes the above method.

[0196] The specific implementation process of the processor 601 can be found in the above method embodiment, and its implementation principle and technical effect are similar, so this embodiment will not be repeated here.

[0197] In the above embodiments, it should be understood that the processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), etc. A general-purpose processor may be a microprocessor or any conventional processor. The steps of the method disclosed in the invention may be directly implemented as being executed by a hardware processor, or may be executed by a combination of hardware and software modules in the processor.

[0198] The memory may include a high-speed memory (Random Access Memory, RAM), and may also include a non-volatile memory (Non-volatile Memory, NVM), such as at least one disk memory.

[0199] The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, the bus in the drawings of the present application is not limited to only one bus or one type of bus.

[0200] The present application also provides a computer program product, including a computer program, which implements the above method when executed by a processor.

[0201] The present application also provides a computer-readable storage medium, in which computer-executable instructions are stored. When a processor executes the computer-executable instructions, the above method is implemented.

[0202] The above-mentioned readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk. The readable storage medium can be any available medium that can be accessed by a general or special-purpose computer.

[0203] An exemplary readable storage medium is coupled to a processor so that the processor can read information from the readable storage medium and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can be located in an application specific integrated circuit (Application Specific Integrated Circuits, referred to as: ASIC). Of course, the processor and the readable storage medium can also exist in the device as discrete components.

[0204] The division of units is only a logical function division, and there may be other divisions in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interface, device or unit, which can be electrical, mechanical or other forms.

[0205] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0206] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0207] If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods of each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0208] Those skilled in the art can understand that all or part of the steps of implementing the above-mentioned method embodiments can be completed by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, the steps of the above-mentioned method embodiments are executed; and the aforementioned storage medium includes: ROM, RAM, disk or optical disk and other media that can store program codes.

[0209] Finally, it should be noted that those skilled in the art will readily conceive of other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. The present invention is intended to cover any variations, uses or adaptations of the present invention, which follow the general principles of the present invention and include common knowledge or customary technical means in the art not disclosed by the present invention, are not limited to the precise structure described above and shown in the drawings, and may be modified and changed in various ways without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A power supply control method, characterized in that: Applied to a power supply control system, the power supply control system includes a diesel generator and an energy storage component, the diesel generator and the energy storage component are used to supply power to a load, the method includes: When the mains power is interrupted, controlling the target battery in the energy storage assembly to supply power to the load; When the target battery in the energy storage assembly supplies power to a load, detecting a usage status of the target battery in the energy storage assembly; Determining the start time of the diesel generator according to the usage status of the target battery in the energy storage assembly; The diesel generator is started according to the start-up time of the diesel generator, and after the remaining power of the target battery in the energy storage component meets the preset remaining power requirement, the diesel generator in the predetermined power generation state is switched to supply power to the load.

2. The method according to claim 1, characterized in that The controlling the target battery in the energy storage assembly to supply power to the load comprises: Determining the remaining power of the battery in the energy storage assembly; Determining a target battery in the battery according to the remaining power of the battery in the energy storage assembly; A target battery among the batteries is controlled to supply power to the load.

3. The method according to claim 2, characterized in that The step of determining a target battery in the battery according to the remaining power of the battery in the energy storage assembly comprises: Determine the power demand information of the load and a first initial screening range of the remaining power of the battery in the energy storage component; According to the power demand information of the load, adjusting a first initial screening range of the remaining power of the battery in the energy storage component to obtain a target screening range; A target battery in the batteries is determined according to the target screening range and the remaining power of the batteries in the energy storage assembly.

4. The method according to any one of claims 1 to 3, characterized in that The energy storage assembly also includes a monitor; When the target battery supplies power to the load, the monitor monitors the target battery in real time; If the result of real-time monitoring indicates that the target battery fails, other target batteries or diesel generators in the energy storage assembly are switched to supply power to the load.

5. The method according to claim 1, characterized in that: The power supply control system also includes a backup diesel generator, After starting the diesel generator according to the start-up time of the diesel generator, and switching the diesel generator in a predetermined power generation state to supply power to the load after the remaining power of the battery in the energy storage assembly meets the preset remaining power requirement, the method further includes: Determining the time for the diesel generator to supply power to the load; If the time for the diesel generator to supply power to the load meets the preset time requirement, the standby diesel generator is started, and after the standby diesel generator is in a predetermined power generation state, the standby diesel generator is switched to supply power to the load.

6. The method according to claim 1, characterized in that When the mains power is normal, the mains power is controlled to charge the battery in the energy storage assembly.

7. The method according to claim 6, characterized in that The controlling the mains to charge the battery in the energy storage assembly includes: Determining the battery to be charged in the battery, the charge amount of the battery to be charged, and the charging priority of the battery to be charged according to the operation status of the mains power and the remaining power of the battery in the energy storage assembly; According to the charging priorities of the batteries to be charged, the batteries to be charged are respectively connected to the mains to charge the batteries to be charged.

8. The method according to claim 7, characterized in that The step of determining the battery to be charged and the charging priority of the battery to be charged according to the operation status of the mains power and the remaining power of the battery in the energy storage assembly comprises: According to the operation status of the mains electricity, the initial screening range of the remaining power of the battery in the energy storage assembly is adjusted to obtain other target screening ranges; Determining the batteries to be charged among the batteries according to the other target screening ranges; The charging priority of the battery to be charged is determined according to the relationship between the battery to be charged in the battery and the range boundary value in the other target screening range.

9. A power supply control device, characterized in that: Applied to a power supply control system, the power supply control system includes a diesel generator and an energy storage component, the diesel generator and the energy storage component are used to supply power to a load, and the device includes: A first power supply module, used for controlling the target battery in the energy storage assembly to supply power to the load when the mains power is interrupted; A detection module, used to detect the use status of the target battery in the energy storage assembly when the target battery in the energy storage assembly supplies power to the load; A determination module, used to determine the start time of the diesel generator according to the use status of the target battery in the energy storage assembly; The second power supply module is used to start the diesel generator according to the start-up time of the diesel generator, so as to switch the diesel generator in a predetermined power generation state to power the load after the remaining power of the target battery in the energy storage component meets the preset remaining power requirement.

10. A power supply control device, characterized in that: include: Memory, processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory, so that the processor performs the method according to any one of claims 1 to 8.

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