A combined power supply system of energy storage and diesel generator

Abstract

This utility model relates to a combined energy storage and diesel generator power supply system, belonging to the field of power, and includes: an energy storage system, a load, and a diesel generator; the energy storage system includes: an energy storage battery, a power converter, a synchronous switch, an output protection switch, an input protection switch, and a local energy manager; the power converter is controlled to the energy storage battery; the power converter is controlled to the synchronous switch; the diesel generator is controlled to the synchronous switch via the input protection switch; the load is controlled to both the power converter and the synchronous switch via the output protection switch; the local energy manager is controlled to both the diesel generator and the synchronous switch; the load is controlled to both the power converter and the diesel generator of the energy storage system via the output protection switch. The local energy manager enables hybrid power supply from non-parallel diesel generators, and the hybrid system of the energy storage system and the diesel generator ensures timely replenishment of the energy storage battery.

Description

Technical Field

[0001] This utility model relates to the field of power, specifically to an energy storage and diesel generator combined power supply system. Background Technology

[0002] With the increasing penetration rate of new energy power generation systems such as photovoltaics and wind power, the mismatch between peak power generation and consumption and the instability of the power grid have intensified. Under the background of new energy distribution and storage, the demand for electrochemical energy storage is growing rapidly.

[0003] Driven by the global demand for low-carbon emission reduction, electrochemical energy storage, as a green, convenient, low-noise, and dispatchable power supply method, has broad application prospects. When electrochemical energy storage systems are used in scenarios without external power sources, rapid recharging will enhance the application capabilities of the energy storage system.

[0004] Mobile power supply equipment is generally used in remote field operations or camping areas, desert regions, and other areas where the land is sparsely populated and the power grid cannot cover the area. Diesel generator sets are mostly located in remote areas such as mountains and deserts where the power grid cannot reach, operating independently to output electricity. Existing diesel generator sets are designed in a box-like form for easy mobility.

[0005] Under the above circumstances, at least the following technical problems will exist: the diesel generator set may malfunction, resulting in a lack of power. To ensure the reliability and stability of power supply, the overall load rate of the diesel generator set is typically maintained at around 70% to leave a margin for backup capacity. This excessive load will lead to relatively low power generation efficiency, high fuel consumption per unit of power generation, and environmental pollution. Utility Model Content

[0006] This utility model is proposed to alleviate or solve at least one aspect or point of the above-mentioned problems.

[0007] This utility model discloses a combined energy storage and diesel generator power supply system, characterized in that it includes: an energy storage system, a load, and a diesel generator;

[0008] The energy storage system includes: energy storage battery, power converter, synchronous switch, output protection switch, input protection switch, and local energy manager;

[0009] The power converter is connected to the energy storage battery control system; the power converter is connected to the synchronous switch control system.

[0010] The power converter and synchronous switch are respectively connected to the load control, and an output protection switch is also provided between the power converter, synchronous switch and the load;

[0011] The diesel generator is connected to the synchronous switch for control, and an input protection switch is also provided between the diesel generator and the synchronous switch.

[0012] The local energy manager is connected to both the diesel generator and the synchronous switch control.

[0013] Preferably, the energy storage battery can supply power to the load independently via a power converter.

[0014] Preferably, the local energy manager can monitor the battery charge and load power in real time.

[0015] Preferably, the local energy manager can start the diesel generator via hotline or communication.

[0016] Preferably, the energy storage battery can be used in conjunction with a diesel generator to supply power to the load.

[0017] Preferably, the diesel generator can supply power to the load while simultaneously charging the energy storage battery.

[0018] Preferably, it also includes a startup power supply, which provides the energy required for the local energy manager to start up; after the local energy manager starts up, the energy storage battery provides the operating power for the local energy manager.

[0019] Preferably, the energy storage system is integrated into a single cabinet.

[0020] Preferably, the synchronizing switch is used to synchronize the output voltage of the diesel generator set with the output voltage of the power converter.

[0021] Preferably, the power converter includes a DC / AC bidirectional inverter.

[0022] This utility model discloses a combined energy storage and diesel generator power supply system, which has the following advantages: The local energy manager can achieve hybrid power supply from non-parallel diesel generators. The local energy manager can also achieve hybrid power supply from parallel diesel generators, and the hybrid system of energy storage and diesel generators ensures timely replenishment of the energy storage battery.

[0023] Compared to systems powered solely by diesel generators, this system operates quietly, smoothly, and fuel-efficiently. Compared to power systems powered solely by energy storage systems, it ensures timely recharging of the energy storage batteries, saving time and costs associated with transporting and charging them. Attached Figure Description

[0024] Figure 1 This is a schematic block diagram of an energy storage and diesel generator combined power supply system, which is an exemplary embodiment of the present invention.

[0025] Figure 2 This is a schematic block diagram of an energy storage and diesel generator combined power supply system, which is another exemplary embodiment of the present invention.

[0026] Among them: 100-Energy storage system, 101-Power converter, 102-Energy storage battery, 103-Local energy manager, 104-Synchronization switch, 105-Output protection switch, 106-Input protection switch, 107-Starting power supply; 200-Diesel generator, 300-Load. Detailed Implementation

[0027] The following description of embodiments of the present invention with reference to the accompanying drawings is intended to explain the overall inventive concept of the present invention and should not be construed as a limitation thereof. In this invention, the same reference numerals denote the same or similar components.

[0028] The features described herein may be implemented in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein are provided only to illustrate some of the many feasible ways of implementing the methods, apparatus, and / or systems described herein, which will become clear upon understanding the disclosure of this utility model.

[0029] Although terms such as “first,” “second,” and “third” may be used herein to describe various components, assemblies, regions, layers, or parts, these components, assemblies, regions, layers, or parts should not be limited by these terms. Rather, these terms are used only to distinguish one component, assembly, region, layer, or part from another.

[0030] In the specification, when an element (such as a layer, region, or substrate) is described as being "on" another element, "connected to," or "bonded to" another element, the element may be directly "on" another element, directly "connected to," or "bonded to" the other element, or one or more other elements may be present in between. Conversely, when an element is described as being "directly on" another element, "directly connected to," or "directly bonded to" another element, no other elements may be present in between.

[0031] The terminology used herein is for the purpose of describing various examples only and is not intended to limit disclosure. Unless the context clearly indicates otherwise, the singular form is intended to include the plural form as well. The terms “comprising,” “including,” and “having” indicate the presence of the described features, quantities, operations, components, elements, and / or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0032] To enable those skilled in the art to use the content of this utility model, the following exemplary embodiments may be provided in conjunction with specific application scenarios, specific systems, device and component parameters, and specific connection methods. However, these embodiments are merely examples for those skilled in the art, and the general principles defined herein can be applied to other embodiments and application scenarios without departing from the spirit and scope of this utility model.

[0033] According to an exemplary embodiment of the present invention: as follows Figure 1 As shown, a diesel engine energy storage and power generation system includes: an energy storage system 100, a load 300, and a diesel generator 200.

[0034] The energy storage system 100 includes: an energy storage battery 102, a power converter 101, a synchronization switch 104, an output protection switch 105, an input protection switch 106, and a local energy manager 103. The power converter 101 converts the direct current (DC) output from the energy storage battery 102 into alternating current (AC), and can also convert externally input AC power into DC. In some alternative embodiments, the power converter 101 may be a DC / AC bidirectional inverter.

[0035] The power converter 101 is controlled / electrically connected to the energy storage battery 102; the power converter 101 is controlled / electrically connected to the synchronous switch 104.

[0036] The diesel generator 200 is controlled and connected to the synchronization switch 104 via the input protection switch 106, and the load 300 is controlled and connected to the power converter 101 and the synchronization switch 104 via the output protection switch 105. The input protection switch 106 and the output protection switch 105 can prevent the risks caused by overload or short circuit. When protection functions are not required, ordinary switches can also be used.

[0037] Synchronous switch 104 is used to adjust the frequency, phase, and other parameters of the output voltage of diesel generator 200. The local energy manager is connected to both diesel generator 200 and synchronous switch 104.

[0038] The local energy manager 103 can monitor the charge level of the energy storage battery 102 and the power of the load 300 in real time. The local energy manager 103 can start the diesel generator 200 via hotline or communication. The energy storage battery 102 can work in conjunction with the diesel generator 200 to supply power to the load 300. The diesel generator 200 can supply power to the load 300 while simultaneously charging the energy storage battery 102.

[0039] like Figure 2As shown, another alternative embodiment of this utility model differs from the previous embodiment in that it further includes a starting power supply 107, which provides the energy required for starting the local energy manager 103. When the local energy manager 103 is running, the energy storage battery 102 provides it with operating power. The starting power supply 107 can be used to directly start the energy storage system 100, which is more convenient than the existing method of starting via an external power grid. The starting power supply 107 is electrically connected to the local energy manager 103 and is used to start the local energy manager 103, thereby starting the energy storage system 100. To conserve the power of the starting power supply 107, after the energy storage system 100 is started, the energy storage battery 102 provides power to the local energy manager 103.

[0040] The following is in conjunction with the appendix Figure 1 2. Briefly describe the working mode of this utility model:

[0041] like Figure 1 As shown in Figure 2, under normal circumstances, the energy storage battery 102 can supply power to the load 300 independently through the power converter 101. At this time, the output protection switch 105 is closed, the input protection switch 106 and the synchronization switch 104 are open.

[0042] The local energy manager 103 monitors the status of the energy storage battery 102 and the load 300 power in real time. When the energy storage battery 102's charge is below a first threshold or the load 300 power is above a second threshold, the local energy manager 103 starts the diesel generator 200 via hotline or communication. The local energy manager 103 closes the synchronization switch 104, controlling the output voltage of the diesel generator 200 to synchronize with the output voltage of the energy storage battery 102, that is, controlling its amplitude, frequency, and phase to be within the preset threshold range of the amplitude, frequency, and phase of the voltage established by the energy storage system 100. At this time, the energy storage system 100 and the diesel generator 200 jointly supply power.

[0043] When the output power of the diesel generator 200 is greater than the power required by the load 300, the excess power is used to charge the battery of the energy storage system 100. When the instantaneous power required by the load 300 is greater than the output power of the diesel generator 200, the insufficient power is supplemented by the discharge of the energy storage battery 102 of the energy storage system 100.

[0044] In the event of an unexpected shutdown of the energy storage system 100, the starting power supply 107 can be used to restart the energy storage system 100.

[0045] Compared with existing technologies, the energy storage and diesel generator 200 combined power supply system of this utility model has the following advantages: the local energy manager 103 can realize the mixed power supply of non-parallel diesel generators 200. The local energy manager 103 can realize the mixed power supply of parallel diesel generators 200, and the mixed system of energy storage system 100 and diesel generator 200 can ensure timely replenishment of energy storage battery 102.

[0046] Compared to systems powered only by the diesel generator 200, this system operates quietly, smoothly, and fuel-efficiently. Compared to power systems powered only by the energy storage system 100, it ensures timely recharging of the energy storage battery 102, saving time and costs associated with transporting and charging it.

[0047] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that variations and combinations of elements may be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A combined energy storage and diesel generator power supply system, characterized by: include: Energy storage systems, loads, and diesel generators; The energy storage system includes: energy storage battery, power converter, synchronous switch, output protection switch, input protection switch, and local energy manager; The power converter is connected to the energy storage battery control system; the power converter is connected to the synchronous switch control system. The power converter and synchronous switch are respectively connected to the load control, and an output protection switch is also provided between the power converter, synchronous switch and the load; The diesel generator is connected to the synchronous switch for control, and an input protection switch is also provided between the diesel generator and the synchronous switch. The local energy manager is connected to both the diesel generator and the synchronous switch control.

2. The power supply system of claim 1, wherein: Energy storage batteries can supply power to loads independently via power converters.

3. The power supply system of claim 1, wherein: The local energy manager can monitor the battery charge and load power in real time.

4. The power supply system of claim 1, wherein: The local energy manager can start the diesel generator via hotline or communication.

5. The power supply system of claim 1, wherein: Energy storage batteries can be used in conjunction with diesel generators to supply power to the load.

6. The power supply system of claim 1, wherein: Diesel generators can supply power to the load and charge the energy storage battery at the same time.

7. The power supply system of claim 1, wherein: It also includes a startup power supply, which provides the energy needed to start the local energy manager; after the local energy manager starts, the energy storage battery provides the operating power for the local energy manager.

8. The power supply system of claim 1, wherein: The energy storage system is integrated into a single cabinet.

9. The power supply system of claim 1, wherein: Synchronization switches are used to synchronize the output voltage of the diesel generator set with the output voltage of the power converter.

10. The power supply system of claim 1, wherein: Power converters include DC / AC bidirectional inverters.

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