Hybrid power supply control method and hybrid power supply system

Abstract

The invention provides a hybrid power supply control method and a hybrid power supply system, a power supply of the system comprises a mains supply, an energy storage battery pack and a diesel generator, the hybrid power supply system uses the mains supply as a main power supply to supply power to a load, the energy storage battery pack and the diesel generator are used as standby power supplies, and the priority of the energy storage battery pack is higher than that of the diesel generator; according to the method, when a diesel generator needs to be started for power supply, the diesel generator is controlled to work within a first working power range; in the power supply process of the diesel generator, the real-time electric power of the load is monitored; and the charging power or the discharging power of the energy storage battery pack is adjusted according to the real-time electric power of the load, so that the diesel generator works within the first working power range. According to the method, the problem that the output power of the diesel generator is difficult to stabilize in the first working power range of the diesel generator due to unstable required power of the load is relieved.

Description

Technical Field

[0001] This application relates to the technical field of power supply, and more particularly, to a hybrid power supply control method and a hybrid power supply system. Background Art

[0002] For the mains power supply, it is inevitable that due to factors such as grid structure, load changes, equipment aging, weather effects, and operation management, the mains power supply cannot be stably provided, that is, power outages occur from time to time.

[0003] In order to improve the stability of power supply, a hybrid power supply system is generally used for power supply. In a current implementation, a diesel generator and the mains power supply can be used for hybrid power supply, with the mains power supply as the main power source and the diesel generator as the backup power source.

[0004] However, in actual applications, the load is uncontrollable, which makes it necessary to control the output power of the diesel generator to change with the change of the load power when using the diesel generator for power supply. Since the diesel engine is a mechanical structure, its control accuracy is relatively low. In addition, frequently changing the output power of the diesel engine also results in a relatively low thermal efficiency of the diesel engine. Summary of the Invention

[0005] The purpose of the embodiments of this application is to provide a hybrid power supply control method, device, and hybrid power supply system, which can, when the load power is unstable, adjust the charging power or discharging power of the energy storage battery pack to make the diesel generator operate within the first working power range, shorten the working duration of the diesel generator, and improve the thermal efficiency of the diesel engine.

[0006] In a first aspect, the embodiments of this application provide a hybrid power supply control method, which is applied to a hybrid power supply system. The power sources of the hybrid power supply system include the mains power supply, an energy storage battery pack, and a diesel generator. The hybrid power supply system uses the mains power supply as the main power source to supply power to a load, and the energy storage battery pack and the diesel generator are used as backup power sources, with the priority of the energy storage battery pack being higher than that of the diesel generator. The method includes: when it is necessary to enable the diesel generator to supply power, controlling the diesel generator to operate within the first working power range; wherein, during the power supply process of the diesel generator, monitoring the real-time power consumption of the load; and adjusting the charging power or discharging power of the energy storage battery pack according to the real-time power consumption of the load, so that the diesel generator operates within the first working power range.

[0007] In a possible implementation, it further includes: when the mains power is connected to the hybrid power supply system, monitoring the current state of charge (SOC) of the energy storage battery pack; when the current SOC of the energy storage battery pack is less than the charging threshold, charging the energy storage battery pack through the mains power.

[0008] In a possible implementation, it further includes: monitoring the power supply state of the mains power; when the mains power is not connected to the hybrid power supply system, determining whether the current SOC of the energy storage battery pack is greater than the discharge threshold; when the current SOC of the energy storage battery pack is greater than the discharge threshold, determining whether the energy storage battery pack meets the power demand of the load; when the energy storage battery pack does not meet the power demand of the load, enabling the energy storage battery pack and the diesel generator to supply power to the load, wherein during the power supply process of the diesel generator, monitoring the real-time power consumption of the load; adjusting the discharge power of the energy storage battery pack according to the power consumption of the load so that the diesel generator operates within the first working power range.

[0009] In a possible implementation, it further includes: when the current SOC of the energy storage battery pack is not greater than the discharge threshold, determining whether the rated power of the diesel generator is greater than the power demand of the load; when the rated power of the diesel generator is greater than the power demand of the load, controlling the diesel generator to supply power to the load and the energy storage battery pack at a working power within the first working power range, wherein during the power supply process of the diesel generator, monitoring the real-time power consumption of the load; adjusting the charging power of the energy storage battery pack according to the power consumption of the load so that the diesel generator operates within the first working power range.

[0010] In a possible implementation, it further includes: when the rated power of the diesel generator is not greater than the power demand of the load, controlling the diesel generator to adapt to the power demand of the load.

[0011] In a possible implementation, it further includes: during the power supply of the diesel generator and the charging of the energy storage battery pack, monitoring the current SOC of the energy storage battery pack; when the current SOC of the energy storage battery pack is greater than the discharge threshold, controlling the diesel generator to stop and enabling the energy storage battery pack to supply power to the load.

[0012] In a possible implementation, the hybrid power supply system includes a power conversion system (PCS) for energy storage and a power distribution device; wherein, the commercial power and the diesel generator respectively charge the energy storage battery pack through the PCS; the power distribution device is used to monitor the load, the commercial power, the energy storage battery pack and the diesel generator, switch the power supply circuit, and control the charging power or discharging power of the energy storage battery pack through the PCS.

[0013] In a possible implementation, the hybrid power supply system further includes a first circuit for the commercial power to supply the load, a second circuit for the commercial power and the energy storage battery pack to supply the load, a third circuit for the energy storage battery pack to supply the load, a fourth circuit for the energy storage battery pack and the diesel generator to supply the load in a hybrid manner, a fifth circuit for the diesel generator and the energy storage battery pack to supply the load, and a sixth circuit for the diesel generator to supply the load; in the second, third, fourth, and fifth circuits, they are all connected to the energy storage battery pack through the PCS; wherein, the power distribution device is used to control the switching between the circuits.

[0014] In a second aspect, an embodiment of the present application provides a hybrid power supply system. The power sources of the hybrid power supply system include commercial power, an energy storage battery pack, and a diesel generator. The hybrid power supply system uses the commercial power as the main power source to supply power to the load, and the energy storage battery pack and the diesel generator are used as backup power sources. The priority of the energy storage battery pack is higher than that of the diesel generator;

[0015] The system includes: a PCS for energy storage and a power distribution device; wherein, the commercial power and the diesel generator respectively charge the energy storage battery pack through the PCS; the power distribution device is used to control the diesel generator to operate within a first operating power range when it is necessary to enable the diesel generator to supply power; wherein, during the power supply process of the diesel generator, the real-time power consumption of the load is monitored; the charging power or discharging power of the energy storage battery pack is adjusted according to the power consumption of the load, so that the diesel generator operates within the first operating power range.

[0016] In a possible implementation, the hybrid power supply system further includes a first circuit for the commercial power to supply the load, a second circuit for the commercial power and the energy storage battery pack to supply the load, a third circuit for the energy storage battery pack to supply the load, a fourth circuit for the energy storage battery pack and the diesel generator to supply the load in a hybrid manner, a fifth circuit for the diesel generator and the energy storage battery pack to supply the load, and a sixth circuit for the diesel generator to supply the load; in the second, third, fourth, and fifth circuits, they are all connected to the energy storage battery pack through the PCS; wherein, the power distribution device is used to control the switching between the circuits.

[0017] In a third aspect, an embodiment of the present application provides a computer device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the computer program, the method steps described in any one of the above first aspects are implemented.

[0018] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, in which a computer program is stored. When the computer program is executed by a processor, the method steps described in any one of the above first aspects are implemented.

[0019] In a hybrid power supply control method and a hybrid power supply system provided by an embodiment of the present application, the power supply of the system includes a commercial power supply, an energy storage battery pack, and a diesel generator. The hybrid power supply system uses the commercial power supply as the main power supply to supply power to the load, and the energy storage battery pack and the diesel generator are used as backup power supplies. The priority of the energy storage battery pack is higher than that of the diesel generator; correspondingly, in this method, when it is necessary to enable the diesel generator to supply power, the diesel generator is controlled to operate within a first operating power range; during the power supply process of the diesel generator, the real-time power consumption of the load is monitored; according to the real-time power consumption of the load, the charging power or discharging power of the energy storage battery pack is adjusted so that the diesel generator operates within the first operating power range. This method can adjust the charging power or discharging power of the energy storage battery pack to keep the output power of the diesel generator stable at the optimal power when the required power of the load is unstable, shorten the working duration of the diesel generator, and improve the thermal efficiency of the diesel engine. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 It is a schematic structural diagram of a hybrid power supply system provided by an embodiment of the present application;

[0022] Figure 2 It is a schematic flow diagram of a hybrid power supply control method provided by an embodiment of the present application. Detailed Embodiments

[0023] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present application. Unless otherwise defined, the technical terms or scientific terms used in the present application shall have the ordinary meaning understood by those of ordinary skill in the art to which the present invention pertains. Words such as "including" or "comprising" mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connected", "coupled" or "linked" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0024] For the convenience of understanding, the nouns involved in the embodiments of the present application are explained below:

[0025] The upper power limit value in the first working power range of the diesel generator can be 85% of the rated power of the diesel generator, and the lower power limit value can be 65% of the rated power of the diesel generator. That is, the first working power range can be 65% - 85% of the rated power of the diesel generator. Preferably, the first working power range can be 70% - 80% of the rated power of the diesel generator. When the diesel generator operates at any working power within the first working power range, the combustion process of the diesel engine is the most stable, with high combustion efficiency, low fuel consumption rate, less heat loss, that is, the highest thermal efficiency, and the minimum mechanical wear. Among them, any working power within the first working power range can be called the optimal working power of the corresponding diesel generator.

[0026] The minimum charging power of the energy storage battery pack is determined according to the configured charging voltage and the minimum charging current at this charging voltage.

[0027] The hybrid power supply control method provided by the embodiments of the present application is applied to Figure 1In the shown hybrid power supply system, the hybrid power supply system may include a power source, an energy storage inverter PCS, and power distribution equipment; the power source of the hybrid power supply system may include the commercial power, an energy storage battery pack, and a diesel generator. The hybrid power supply system may use the commercial power as the main power source to supply power to the load, and the energy storage battery pack and the diesel generator may be used as backup power sources. Among them, the power supply priorities of the commercial power, the energy storage battery pack, and the diesel generator are: the priority of the commercial power is higher than that of the energy storage battery pack, and the priority of the energy storage battery pack is higher than that of the diesel generator. The commercial power and the diesel generator respectively charge the energy storage battery pack through the energy storage inverter PCS; the priorities of battery pack charging and load power supply are: the priority of load power supply is higher than that of battery pack charging. Therefore, when the required power of the load and the charging power of the battery pack exceed the maximum output power of the diesel generator, the power supply demand of the load is preferentially satisfied.

[0028] The power distribution equipment is used to monitor the load, the commercial power, the energy storage battery pack, and the diesel generator, switch the power supply circuit, and control the charging power or discharging power of the energy storage battery pack through the PCS. Among them, the power supply circuit may include a first circuit for the commercial power to supply power to the load, a second circuit for the commercial power to supply power to the load and the energy storage battery pack, a third circuit for the energy storage battery pack to supply power to the load, a fourth circuit for the energy storage battery pack and the diesel generator to supply power to the load together, a fifth circuit for the diesel generator to supply power to the load and the energy storage battery pack, and a sixth circuit for the diesel generator to supply power to the load; in the second, third, fourth, and fifth circuits, they are all connected to the energy storage battery pack through the energy storage inverter PCS. The power distribution equipment includes a control board and a switching board (such as a relay). Among them, the control board is used to communicate with the PCS to obtain real-time information of the energy storage battery pack, the real-time power consumption of the load, and execute the start and stop of the diesel generator, and communicate with the switching board to control the switching of the power supply circuit; the switching board is used to receive the level signal from the control board and switch the power supply circuit; the connection method of the hybrid power supply system may include: communication connection and power connection between the energy storage battery pack and the PCS; power connection between the PCS and the switching board; communication connection between the control board and the PCS; power connection and communication connection between the switching board and the control board.

[0029] Furthermore, the power source of the hybrid power supply system may also include power supply equipment of renewable energy sources such as photovoltaic power supply equipment and wind power supply equipment to improve the utilization rate of renewable energy, and realize the switching of multiple power supply equipment through the hybrid power supply control method of this application.

[0030] In the hybrid power supply control system provided by the embodiments of the present application, through the power supplies of the commercial power, the energy storage battery pack, and the diesel generator and the corresponding power supply circuits, in scenarios with unstable power, the continuity and reliability of power supply can be ensured through the switching control of the commercial power, the diesel generator, and the energy storage battery pack. When the diesel generator is enabled for power supply, as the load power changes, through the power resource allocation of adjusting the charging power or the discharging power of the energy storage battery pack, the output power of the diesel generator can be accurately controlled at any working power (i.e., the optimal working power) within the first working power range, shortening the working duration of the diesel generator and improving the thermal efficiency of the diesel engine.

[0031] The following describes the preferred embodiments of the present application with reference to the accompanying drawings of the specification. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present application and are not used to limit the present application. And without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0032] Figure 2 It is a schematic flowchart of a hybrid power supply control method provided by the embodiments of the present application. As Figure 2 shown, the method may include:

[0033] Step S210, detect whether it is necessary to enable the diesel generator for power supply.

[0034] If it is detected that the commercial power voltage is stable, it indicates that it is not necessary to enable the diesel generator for power supply;

[0035] If it is detected that the commercial power does not exist or the commercial power voltage is unstable, it indicates that it is necessary to enable the diesel generator for power supply; among them, the situation of unstable commercial power voltage includes that the commercial power frequently trips (such as the commercial power is sometimes available and sometimes not), or the commercial power voltage is lower than the preset value (such as 170v) for a preset duration.

[0036] Step S220, when it is necessary to enable the diesel generator for power supply, control the diesel generator to work within the first working power range.

[0037] Specifically, during the power supply process of the diesel generator, monitor the real-time power consumption of the load; adjust the charging power or the discharging power of the energy storage battery pack according to the real-time power consumption of the load, so that the diesel generator works within the first working power range.

[0038] When the hybrid power supply control method provided by the embodiments of the present application detects that it is necessary to enable the diesel generator for power supply, as the load power changes, by adjusting the charging power or the discharging power of the energy storage battery pack, the output power of the diesel generator can be accurately controlled at any working power within the first working power range, shortening the working duration of the diesel generator and improving the thermal efficiency of the diesel engine.

[0039] In some embodiments, it is possible to detect whether it is necessary to enable a diesel generator for power supply by monitoring the power supply state of the mains electricity. This power supply state may include the state where the mains electricity is connected to the hybrid power supply system and the state where the mains electricity is not connected to the hybrid power supply system. The method of the present application may further include:

[0040] 1) When the mains electricity is connected to the hybrid power supply system, monitor the current state of charge (SOC) of the energy storage battery pack;

[0041] If the current SOC of the energy storage battery pack is less than the charging threshold, charge the energy storage battery pack through the mains electricity, and at the same time, the mains electricity also powers the load.

[0042] If the current SOC of the energy storage battery pack is greater than the discharge threshold, power the load through the mains electricity.

[0043] Among them, the charging threshold is a preset SOC threshold for which charging is required, such as 5%; the discharge threshold is a preset SOC threshold for which discharging is required, such as 90%;

[0044] 2) When the mains electricity is not connected to the hybrid power supply system, determine whether the current SOC of the energy storage battery pack is greater than the discharge threshold;

[0045] If the current SOC of the energy storage battery pack is greater than the discharge threshold, determine whether the energy storage battery pack meets the power demand of the load, that is, whether the rated power of the battery pack of the energy storage battery pack is greater than the power demand of the load;

[0046] When the energy storage battery pack meets the power demand of the load, only enable the energy storage battery pack to power the load.

[0047] When the energy storage battery pack does not meet the power demand of the load, enable the energy storage battery pack and the diesel generator to power the load. Specifically: during the power supply process of the diesel generator, monitor the real-time power consumption of the load; adjust the discharge power of the energy storage battery pack according to the power consumption of the load, so that the diesel generator operates within the first working power range.

[0048] If the current SOC of the energy storage battery pack is not greater than the discharge threshold, determine whether the rated power of the diesel generator is greater than the power demand of the load;

[0049] When the rated power of the diesel generator is greater than the power demand of the load, control the diesel generator to supply power to the load and the energy storage battery pack at any working power within the first working power range. Specifically: during the power supply process of the diesel generator, monitor the real-time power consumption of the load; adjust the charging power of the energy storage battery pack according to the power consumption of the load, so that the diesel generator operates within the first working power range.

[0050] When the rated power of the diesel generator is not greater than the power demand of the load, control the diesel generator to adapt to the power demand of the load.

[0051] Furthermore, during the process of the diesel generator supplying power and charging the energy storage battery pack, monitor the current SOC of the energy storage battery pack;

[0052] If the current SOC of the energy storage battery pack is greater than the discharge threshold, control the diesel generator to shut down and enable the energy storage battery pack to supply power to the load.

[0053] In one example, the hybrid power supply control method of the present application includes the case of not considering power optimization allocation and the case of considering power optimization allocation. Among them, the case of power optimization allocation refers to the case where the diesel generator is controlled to operate within the first operating power range.

[0054] 1. Without considering power optimization allocation, the power supply state of the commercial power and the current SOC of the energy storage battery pack can be monitored in real time. Based on different power supply states and different current battery pack SOCs, the hybrid power supply system controls different circuits to supply power to the load, including:

[0055] (1) When the commercial power is connected to the hybrid power supply system and the battery pack SOC is greater than the discharge threshold, supply power to the load through the first circuit, that is, supply power to the load through the commercial power;

[0056] (2) When the commercial power is connected to the hybrid power supply system and the battery pack SOC is less than the charging threshold, supply power to the load through the second circuit, that is, supply power to the load through the commercial power and charge the battery pack at the same time;

[0057] (3) When the commercial power is not connected to the hybrid power supply system and the battery pack SOC is greater than the discharge threshold, supply power to the load through the third circuit, that is, the battery pack discharges to supply power to the load;

[0058] (4) When the commercial power is not connected to the hybrid power supply system and the battery pack SOC is less than the charging threshold, supply power to the load through the fifth circuit, that is, the diesel generator charges the battery pack and supplies power to the load at the same time;

[0059] Through the above power supply control strategy, the uninterrupted power supply of the system is ensured. Since the distribution equipment includes relays, when the power supply of the power grid is unstable, the system can switch the power supply source within 20 milliseconds. Among them, 20 ms is the delay time of the switching action of the relay.

[0060] In addition, considering that the fuel consumption per kilowatt-hour of a diesel generator during operation is related to the load power, that is, when the diesel generator load is closer to the rated power of the diesel generator, the fuel consumption per kilowatt-hour is lower. To ensure that the fuel consumption of the diesel generator is as low as possible, the diesel generator must operate constantly near the rated power. However, in actual applications, the load power fluctuates greatly and it is difficult to stay stable near the rated power of the diesel generator for a long time. In addition, when the diesel generator operates at the rated power for a long time, its flywheel wears out significantly.

[0061] II. This application can automatically adjust the output power of the diesel generator through PCS based on the required power of the load and the rated power of the diesel generator. When P 柴发额定 -P 负载 >P 电池最小充电 , P 电池充电功率 =P 柴发额定 -P 负载 ; when P 柴发额定 -P 负载 <P 电池最小充电 , P 电池充电功率 =0. Thus, it is ensured that P 负载 +P 电池充电功率 =P 柴发额定 .

[0062] Therefore, considering power optimization distribution, the power supply status of the mains power and the current SOC of the energy storage battery pack can be monitored in real time. Based on different power supply statuses and different current battery pack SOCs, the hybrid power supply system controls different circuits to supply power to the load, including:

[0063] (1) When the mains power is connected to the hybrid power supply system and the battery pack SOC is greater than the discharge threshold, supply power to the load through the first circuit;

[0064] (2) When the mains power is connected to the hybrid power supply system and the battery pack SOC is less than the charging threshold, supply power to the load through the second circuit, that is, supply power to the load through the mains power and charge the battery pack at the same time;

[0065] (3) When the mains power is not connected to the hybrid power supply system and the battery pack SOC is greater than the discharge threshold, including:

[0066] If the power demand of the load is less than the rated power of the battery pack, that is, the energy storage battery pack meets the power demand of the load, supply power to the load through the third circuit;

[0067] If the power demand of the load is not less than the rated power of the battery pack, that is, the energy storage battery pack does not meet the power demand of the load, supply power to the load through the fourth circuit; at this time, if the load power is less than the rated power of the battery pack plus the optimal operating power of the diesel generator, the diesel generator will operate stably at the optimal power;

[0068] (4) When the mains power is not connected to the hybrid power supply system and the SOC of the battery pack is less than the charging threshold, it includes:

[0069] A. When the power demand of the load is less than the rated power of the diesel generator, the load is powered through the fifth circuit, and the battery pack is charged at the same time; among them, in the case where the power demand of the load is less than the rated power of the diesel generator, there are the following two situations:

[0070] If the power demand of the load power is less than the optimal operating power of the diesel generator minus the minimum charging power of the battery pack, at this time, since the battery pack is in the charging state, this increases the total load power at the output end of the diesel generator, and the diesel generator will operate stably at the optimal power.

[0071] If the power demand of the load power is greater than the optimal operating power of the diesel generator minus the minimum charging power of the battery pack and less than the rated power of the diesel generator, the output power of the diesel generator will increase as the load power increases.

[0072] B. When the power demand of the load is greater than the rated power of the diesel generator, the load is powered through the sixth circuit.

[0073] Since the charging priority of the battery pack is higher than the power supply priority of the load, when the demand power of the load and the charging power of the battery pack exceed the maximum output power of the diesel generator, the power supply demand of the load is preferentially satisfied.

[0074] The hybrid power supply control method provided by the embodiment of the present application through adaptive power control management takes the energy storage battery pack during charging as one of the diesel generator loads, dynamically adjusts the charging power of the battery pack to control the overall output power of the diesel generator, so that the output power of the diesel generator is controlled within the first operating power range, and at the same time the battery pack can store excess power, reducing the running time of the diesel generator under low load and improving the fuel use efficiency; the excess power stored in the battery pack can be used to power the load alone, thereby shortening the overall working duration of the diesel generator.

[0075] Those skilled in the art should understand that the embodiments in the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the embodiments in the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the embodiments in the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0076] Embodiments of the present application are described with reference to the flowcharts and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present application. It should be understood that each flow and / or block in the flowchart and / or block diagram, and the combination of flows and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, such that the instructions executed by the processor of the computer or other programmable data processing device produce means for implementing the functions specified in one flow Figure 1 one flow or multiple flows and / or blocks Figure 1 or multiple blocks.

[0077] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, such that the instructions stored in the computer-readable memory produce a manufactured article including instruction means that implement the functions specified in one flow Figure 1 one flow or multiple flows and / or blocks Figure 1 or multiple blocks.

[0078] These computer program instructions can also be loaded onto a computer or other programmable data processing device, such that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process, and thus the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one flow Figure 1 one flow or multiple flows and / or blocks Figure 1 or multiple blocks.

[0079] Although the preferred embodiments in the embodiments of the present application have been described, those skilled in the art can make additional changes and modifications once they know the basic creative concepts. Therefore, the appended claims are intended to be construed to include the preferred embodiments and all changes and modifications falling within the scope of the embodiments of the present application.

[0080] Obviously, those skilled in the art can make various changes and variations to the embodiments in the embodiments of the present application without departing from the spirit and scope of the embodiments in the embodiments of the present application. Thus, if these modifications and variations of the embodiments in the embodiments of the present application fall within the scope of the claims of the embodiments of the present application and their equivalent technologies, the embodiments of the present application are also intended to include these changes and variations.

Claims

1. A hybrid power supply control method, characterized in that: Applied to a hybrid power supply system, the power source of the hybrid power supply system includes mains electricity, energy storage battery pack and diesel generator, the hybrid power supply system uses the mains electricity as the main power source to supply power to the load, the energy storage battery pack and the diesel generator are used as backup power sources, and the energy storage battery pack has a higher priority than the diesel generator; The method comprises: When the diesel generator needs to be enabled to supply power, controlling the diesel generator to operate within a first operating power range; Wherein, during the power supply process of the diesel generator, the real-time power consumption of the load is monitored; the charging power or discharging power of the energy storage battery pack is adjusted according to the real-time power consumption of the load, so that the diesel generator operates within the first working power range.

2. The method according to claim 1, characterized in that Also includes: When the mains is connected to the hybrid power supply system, the current remaining power SOC of the energy storage battery pack is monitored; When the current SOC of the energy storage battery pack is less than a charging threshold, the energy storage battery pack is charged by the mains power.

3. The method according to claim 1, characterized in that Also includes: Monitoring the power supply status of the mains electricity; When the mains is not connected to the hybrid power supply system, determining whether the current SOC of the energy storage battery pack is greater than a discharge threshold; When the current SOC of the energy storage battery pack is greater than a discharge threshold, determining whether the energy storage battery pack meets the power demand of the load; When the energy storage battery pack cannot meet the power demand of the load, the energy storage battery pack and the diesel generator are enabled to power the load, wherein during the power supply process of the diesel generator, the real-time power consumption of the load is monitored; and the discharge power of the energy storage battery pack is adjusted according to the power consumption of the load so that the diesel generator operates within a first operating power range.

4. The method according to claim 3, characterized in that: Also includes: When the current SOC of the energy storage battery pack is not greater than the discharge threshold, determining whether the rated power of the diesel generator is greater than the power demand of the load; When the rated power of the diesel generator is greater than the power demand of the load, the diesel generator is controlled to supply power to the load and the energy storage battery pack at an operating power within a first operating power range, wherein during the power supply process of the diesel generator, the real-time power consumption of the load is monitored; and the charging power of the energy storage battery pack is adjusted according to the power consumption of the load so that the diesel generator operates within the first operating power range.

5. The method according to claim 4, characterized in that Also includes: When the rated power of the diesel generator is not greater than the power demand of the load, the diesel generator is controlled to adapt to the power demand of the load.

6. The method according to claim 4, characterized in that Also includes: During the process of the diesel generator supplying power and charging the energy storage battery pack, monitoring the current SOC of the energy storage battery pack; When the current SOC of the energy storage battery pack is greater than a discharge threshold, the diesel generator is controlled to shut down, and the energy storage battery pack is enabled to supply power to the load.

7. The method according to any one of claims 1 to 6, characterized in that: The hybrid power supply system includes an energy storage inverter PCS and a power distribution device; wherein the AC power and the diesel generator charge the energy storage battery pack through the energy storage inverter PCS respectively; the power distribution device is used to monitor the load, the AC power, the energy storage battery pack and the diesel generator, switch the power supply circuit and control the charging power or discharging power of the energy storage battery pack through the PCS.

8. The method according to claim 7, characterized in that The hybrid power supply system also includes a first circuit for mains power supply loads, a second circuit for mains power supply loads and energy storage battery packs, a third circuit for energy storage battery pack power supply loads, a fourth circuit for energy storage battery pack and diesel generator hybrid power supply loads, a fifth circuit for diesel generator power supply loads and energy storage battery packs, and a sixth circuit for diesel generator power supply loads; the second circuit, the third circuit, the fourth circuit, and the fifth circuit are all connected to the energy storage battery pack through the energy storage inverter PCS; The power distribution equipment is used to control the switching between various circuits.

9. A hybrid power supply system, characterized in that: The power source of the hybrid power supply system includes mains electricity, energy storage battery pack and diesel generator. The hybrid power supply system uses the mains electricity as the main power source to supply power to the load, and the energy storage battery pack and the diesel generator are used as backup power sources. The energy storage battery pack has a higher priority than the diesel generator. The system includes: an energy storage inverter PCS and a power distribution device; wherein the mains power and the diesel generator charge the energy storage battery pack respectively through the energy storage inverter PCS; the power distribution device is used to control the diesel generator to operate within a first working power range when it is necessary to enable the diesel generator to supply power; wherein, during the power supply process of the diesel generator, the real-time power consumption of the load is monitored; and the charging power or discharging power of the energy storage battery pack is adjusted according to the power consumption of the load, so that the diesel generator operates within the first working power range.

10. The hybrid power supply system according to claim 9, characterized in that: The hybrid power supply system also includes a first circuit for mains power supply loads, a second circuit for mains power supply loads and energy storage battery packs, a third circuit for energy storage battery pack power supply loads, a fourth circuit for energy storage battery pack and diesel generator hybrid power supply loads, a fifth circuit for diesel generator power supply loads and energy storage battery packs, and a sixth circuit for diesel generator power supply loads; the second circuit, the third circuit, the fourth circuit, and the fifth circuit are all connected to the energy storage battery pack through the energy storage inverter PCS; The power distribution equipment is used to control the switching between various circuits.

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