Photovoltaic energy storage diesel engine comprehensive micro-grid power supply system

Abstract

The invention discloses a photovoltaic energy storage diesel engine comprehensive micro-grid power supply system which comprises a photovoltaic array, an inverter cabinet, a first alternating current confluence cabinet, a second alternating current confluence cabinet, a liquid cooling energy storage alternating current integrated cabinet, an electrical cabinet and an energy management system. The system has the technical effects and advantages that the system is innovative in integrated and modular design; a highly integrated and modular system architecture is adopted, and equipment such as a photovoltaic module, an energy storage battery pack, a diesel generator, an inverter and a controller is integrated into a standardized module; the modules can be flexibly combined and rapidly mounted and dismounted, expansion, upgrading and maintenance of the system are facilitated, the site construction time is greatly shortened, the mounting time is shortened by 30% compared with a traditional non-modular system, and follow-up maintenance work is greatly facilitated.

Description

Technical Field

[0001] The present invention relates to the field of power supply technology, and more specifically to an overseas photovoltaic energy storage diesel engine integrated microgrid power supply system. Specifically, it belongs to the intersection of distributed energy systems and microgrid technology. This field focuses on integrating a variety of energy resources to ensure reliable power supply under different geographical and climatic conditions overseas. It covers solar photovoltaic technology, which is used to convert light energy into electrical energy; energy storage technology, including various forms such as battery energy storage, to achieve storage and release regulation of electrical energy; and diesel engine power generation technology, which serves as an emergency or supplementary energy source when photovoltaic and energy storage are insufficient, and together builds a stable microgrid power supply environment. Background Art

[0002] In many overseas regions, power supply issues face many challenges. On the one hand, the weak grid infrastructure in some areas makes it difficult to meet the growing local electricity demand. The traditional centralized power supply method has extremely high construction costs in remote areas, and the power transmission loss is large. On the other hand, some overseas regions have complex geographical environments and frequent natural disasters, which seriously threatens the stability of power supply. At the same time, the lack of diversity in energy supply is also a key issue. When facing energy shortages or specific faults, the single energy power supply method is prone to power outages.

[0003] With the development of renewable energy technology, photovoltaic energy has attracted attention for its clean and sustainable advantages, but photovoltaic energy has the problem of intermittent power generation. The progress of energy storage technology has made it possible to solve this problem, but the energy storage capacity is limited. Diesel engine power generation technology is mature and reliable, and can be used as an effective supplement in emergencies or when photovoltaic and energy storage are insufficient. Therefore, the development of a photovoltaic energy storage diesel engine integrated microgrid power supply system is of great significance for stable power supply in complex overseas environments. Summary of the invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a photovoltaic energy storage diesel engine integrated microgrid power supply system.

[0005] The technical solution of the present invention is as follows:

[0006] A photovoltaic energy storage diesel engine integrated microgrid power supply system, comprising a photovoltaic array, an inverter cabinet, a first AC combiner cabinet, a second AC combiner cabinet, a liquid-cooled energy storage AC integrated cabinet, an electrical cabinet, and an energy management system;

[0007] The photovoltaic array is connected to the input end of the first AC combiner cabinet through the inverter cabinet, and the output end of the first AC combiner cabinet is connected to one of the input ends of the second AC combiner cabinet; the second AC combiner cabinet is connected to the liquid-cooled energy storage AC integrated cabinet through the transformer cabinet; one of the second input ends of the second AC combiner cabinet is connected to the generator; the output end of the second AC combiner cabinet is connected to the input end of the electrical cabinet.

[0008] Furthermore, a plurality of control circuits are arranged in the electrical cabinet, and the output ends of the control circuits are connected to corresponding electrical equipment.

[0009] Furthermore, the first AC junction box and the second AC junction box are both provided with multiple sets of current transformers, surge protectors and circuit breakers, and the current entering the first AC junction box and the second AC junction box passes through the current transformers, circuit breakers and surge protectors in sequence and then converges.

[0010] Furthermore, a plurality of battery packs are placed in the liquid-cooled energy storage AC integrated cabinet, and the battery packs are connected to the transformer in the transformer cabinet through an inverter.

[0011] Furthermore, the energy management system is connected to a photovoltaic array switching control module for controlling the photovoltaic array.

[0012] Furthermore, the energy management system is connected to a battery pack charge and discharge control module for controlling the charge and discharge of the battery pack.

[0013] Furthermore, the energy management system is connected to a diesel engine switching control module for controlling the diesel generator.

[0014] Furthermore, the energy management system is connected to a signal processing module, and a plurality of sensors are provided at the input end of the signal processing module, and the plurality of sensors are respectively located at each position of the photovoltaic energy storage diesel engine integrated microgrid power supply system.

[0015] Furthermore, the output end of the signal processing module is connected to a real-time monitoring module, and the real-time monitoring module includes a real-time data display unit, a fault alarm unit, a data analysis unit, and a monitoring and analysis unit.

[0016] Furthermore, the energy management system is connected to a historical database, and the historical database interacts with a historical data display unit in a real-time monitoring module.

[0017] Technical effects and advantages of the present invention:

[0018] Integration and modular design innovation: A highly integrated and modular system architecture is adopted to integrate photovoltaic modules, energy storage battery packs, diesel generators, inverters, controllers and other equipment into standardized modules. These modules can be flexibly combined and quickly installed and disassembled, which is convenient for system expansion, upgrading and maintenance, greatly shortening the on-site construction time, reducing the installation time by 30% compared with traditional non-modular systems, and greatly facilitating subsequent maintenance work. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall circuit structure of the present invention.

[0020] Figure 2 This is the energy flow chart of the integrated photovoltaic, storage and diesel microgrid.

[0021] Markings in the figure: +E1: first AC combiner cabinet; +E2: second AC combiner cabinet; +E3: electrical cabinet; +E4: inverter cabinet; +E5: liquid-cooled energy storage AC integrated cabinet; +E6: transformer cabinet;

[0022] -PV01…-PV0X photovoltaic array; -INT inverter; DC / AC direct current / alternating current; -TA current transformer; -QF circuit breaker; -SPD surge protector; GB battery pack; -G diesel generator. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Embodiment 1

[0025] like Figure 1 As shown, a photovoltaic energy storage diesel engine integrated microgrid power supply system includes a photovoltaic array-PV01...-PV0X, an inverter cabinet + E4, a first AC junction cabinet + E1, a second AC junction cabinet + E2, a liquid-cooled energy storage AC integrated cabinet + E5, an electrical cabinet + E3, and an energy management system EMS;

[0026] The photovoltaic array is connected to the input end of the first AC combiner cabinet through the inverter cabinet, and the output end of the first AC combiner cabinet is connected to one of the input ends of the second AC combiner cabinet; the second AC combiner cabinet is connected to the liquid-cooled energy storage AC integrated cabinet through the transformer cabinet; one of the second input ends of the second AC combiner cabinet is connected to the generator; the output end of the second AC combiner cabinet is connected to the input end of the electrical cabinet.

[0027] A plurality of control circuits are arranged in the electrical cabinet, and the output ends of the control circuits are connected to corresponding electrical equipment.

[0028] The first AC junction box and the second AC junction box are both provided with multiple sets of current transformers, surge protectors and circuit breakers. The currents entering the first AC junction box and the second AC junction box pass through the current transformers, circuit breakers and surge protectors in sequence and then converge.

[0029] A plurality of battery packs are placed in the liquid-cooled energy storage AC integrated cabinet, and the battery packs are connected to the transformer in the transformer cabinet through an inverter.

[0030] Embodiment 2

[0031] like Figure 2 As shown, the energy management system is connected to a photovoltaic array switching control module for controlling the photovoltaic array.

[0032] The energy management system is connected to the battery pack charge and discharge control module and is used to control the charge and discharge of the battery pack.

[0033] The energy management system is connected to the diesel engine switching control module and is used to control the diesel generator.

[0034] The energy management system is connected to a signal processing module, and a plurality of sensors are provided at an input end of the signal processing module. The plurality of sensors are respectively located at each position of the photovoltaic energy storage diesel engine integrated microgrid power supply system.

[0035] The output end of the signal processing module is connected to the real-time monitoring module, which includes a real-time data display unit, a fault alarm unit, a data analysis unit, and a monitoring and analysis unit.

[0036] The energy management system is connected to a historical database, and the historical database interacts with a historical data display unit in a real-time monitoring module.

[0037] The present invention is innovative in its integrated and modular design: it uses a highly integrated and modular system architecture to integrate photovoltaic modules, energy storage battery packs, diesel generators, inverters, controllers and other equipment into standardized modules. These modules can be flexibly combined and quickly installed and disassembled, facilitating system expansion, upgrading and maintenance, greatly shortening on-site construction time, reducing installation time by 30% compared to traditional non-modular systems, and greatly facilitating subsequent maintenance work.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A photovoltaic energy storage diesel engine integrated microgrid power supply system, characterized by: It includes photovoltaic array, inverter cabinet, first AC combiner cabinet, second AC combiner cabinet, liquid-cooled energy storage AC integrated cabinet, electrical cabinet, and energy management system; The photovoltaic array is connected to the input end of the first AC combiner cabinet through the inverter cabinet, and the output end of the first AC combiner cabinet is connected to one of the input ends of the second AC combiner cabinet; the second AC combiner cabinet is connected to the liquid-cooled energy storage AC integrated cabinet through the transformer cabinet; one of the second input ends of the second AC combiner cabinet is connected to the generator; the output end of the second AC combiner cabinet is connected to the input end of the electrical cabinet.

2. A photovoltaic energy storage diesel engine integrated microgrid power supply system according to claim 1, characterized in that: A plurality of control circuits are arranged in the electrical cabinet, and the output ends of the control circuits are connected to corresponding electrical equipment.

3. A photovoltaic energy storage diesel engine integrated microgrid power supply system according to claim 1, characterized in that: The first AC junction box and the second AC junction box are both provided with multiple sets of current transformers, surge protectors and circuit breakers. The currents entering the first AC junction box and the second AC junction box pass through the current transformers, circuit breakers and surge protectors in sequence and then converge.

4. A photovoltaic energy storage diesel engine integrated microgrid power supply system according to claim 1, characterized in that: A plurality of battery packs are placed in the liquid-cooled energy storage AC integrated cabinet, and the battery packs are connected to the transformer in the transformer cabinet through an inverter.

5. The photovoltaic energy storage diesel engine integrated microgrid power supply system according to claim 1 is characterized by: The energy management system is connected to the photovoltaic array switching control module and is used to control the photovoltaic array.

6. A photovoltaic energy storage diesel engine integrated microgrid power supply system according to claim 1, characterized in that: The energy management system is connected to the battery pack charge and discharge control module and is used to control the charge and discharge of the battery pack.

7. The photovoltaic energy storage diesel engine integrated microgrid power supply system according to claim 1 is characterized by: The energy management system is connected to the diesel engine switching control module and is used to control the diesel generator.

8. The photovoltaic energy storage diesel engine integrated microgrid power supply system according to claim 1 is characterized by: The energy management system is connected to a signal processing module, and a plurality of sensors are provided at an input end of the signal processing module. The plurality of sensors are respectively located at each position of the photovoltaic energy storage diesel engine integrated microgrid power supply system.

9. A photovoltaic energy storage diesel engine integrated microgrid power supply system according to claim 8, characterized in that: The output end of the signal processing module is connected to the real-time monitoring module, which includes a real-time data display unit, a fault alarm unit, a data analysis unit, and a monitoring and analysis unit.

10. The photovoltaic energy storage diesel engine integrated microgrid power supply system according to claim 1, characterized in that: The energy management system is connected to a historical database, and the historical database interacts with a historical data display unit in a real-time monitoring module.

Images