Photovoltaic, energy storage and diesel generating set combined power supply system on oil testing site

Abstract

The invention relates to the technical field of micro-grid application, in particular to an oil testing field photovoltaic, energy storage and diesel generating set combined power supply system which comprises a photovoltaic power generation system, an energy storage system, a diesel power generation system, a controller and a load end. The controller is electrically connected with the photovoltaic power generation system, the energy storage system and the diesel power generation system through communication buses, the photovoltaic power generation system is electrically connected with the energy storage system, the energy storage system is connected with the diesel power generation system in parallel, the energy storage system and the diesel power generation system are electrically connected with the load end, and a load switch is arranged on a circuit of the input side of the load end. The load switch is electrically connected with the controller through a communication bus. The photovoltaic power generation system, the energy storage system and the diesel power generation system are organically combined, so that the photovoltaic power generation system and the energy storage system are utilized to the maximum extent, the utilization rate of the diesel generator set is reduced, and the goals of greenness, environmental protection and energy conservation are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of microgrid application, and is a photovoltaic, energy storage and diesel generator set combined power supply system at an oil testing site. Background Art

[0002] In some applications that require self-generation, diesel generators are often used as a single power generation method to obtain electricity. Diesel generators are reliable, not affected by geographical location and environmental factors, and can operate around the clock. However, this power generation method not only has high energy consumption and high power generation costs, but also has high carbon emissions and a relatively large impact on the environment.

[0003] With the continuous progress and development of science and technology, photovoltaic power generation systems and energy storage systems have been favored by people for their green, clean and zero-pollution characteristics. However, photovoltaic power generation systems are greatly affected by geographical location and environmental factors. Rainy, snowy, cloudy, foggy and even cloud changes will seriously affect the power generation status of the system.

[0004] Therefore, it is necessary to develop and design a power supply system that can meet all-weather operation and energy conservation and environmental protection to solve the above technical problems. Summary of the invention

[0005] The present invention provides a photovoltaic, energy storage and diesel generator set combined power supply system at the oil test site, which overcomes the shortcomings of the above-mentioned prior art and can effectively solve the problem that the photovoltaic power generation system and the energy storage system are greatly affected by geographical location and environmental factors, and the rainy, snowy, cloudy, foggy and even cloud changes will seriously affect the power generation status of the system.

[0006] The technical solution of the present invention is achieved through the following measures: a photovoltaic, energy storage and diesel generator set combined power supply system at an oil test site, including a photovoltaic power generation system, an energy storage system, a diesel power generation system, a controller and a load end; the controller is electrically connected to the photovoltaic power generation system, the energy storage system and the diesel power generation system through a communication bus, the photovoltaic power generation system is electrically connected to the energy storage system, the energy storage system and the diesel power generation system are connected in parallel, the energy storage system and the diesel power generation system are electrically connected to the load end respectively, a load switch is provided on the circuit on the input side of the load end, and the load switch is electrically connected to the controller through the communication bus.

[0007] The following are further optimizations and / or improvements to the above technical solutions: The controller may be a programmable controller, and an energy management system is provided inside the controller for performing energy management on the power supply system.

[0008] An operation terminal may also be included, and the operation terminal is electrically connected to the controller.

[0009] The above-mentioned operation terminal can be an operation screen or a computer.

[0010] The diesel power generation system may include a diesel generator set and a grid-connected switch, the diesel generator set is electrically connected to the grid-connected switch, and the grid-connected switch and the diesel generator set are electrically connected to the controller via a communication bus, respectively.

[0011] The photovoltaic power generation system may include a photovoltaic controller, a photovoltaic switch and a photovoltaic panel assembly. The photovoltaic controller is electrically connected to the photovoltaic panel assembly via the photovoltaic switch. The photovoltaic controller and the photovoltaic switch are electrically connected to the controller via a communication bus.

[0012] The energy storage system may include an energy storage battery, a battery switch and an energy storage inverter. The energy storage battery is electrically connected to the energy storage inverter via the battery switch. The battery switch and the energy storage inverter are electrically connected to the controller via a communication bus.

[0013] The present invention is a joint application solution of photovoltaic, energy storage and diesel generator sets, which organically combines the above three power generation systems, and uses the energy management system to maximize the use of photovoltaic and energy storage, reduce the utilization rate of diesel generators, and achieve the goals of green, environmental protection and energy saving. The present invention coordinates and manages the photovoltaic controller, energy storage inverter, energy storage battery and diesel generator set through the energy management system in the controller, so that they can work in a coordinated manner, optimize and maximize the energy transfer and utilization rate of each system, and organically combines the above photovoltaic power generation system, energy storage system and diesel power generation system to maximize the use of photovoltaic power generation system and energy storage system, reduce the utilization rate of diesel generator sets, and achieve the goals of green, environmental protection and energy saving. The present invention can not only achieve the purpose of being unaffected by geographical location and environmental factors, and can operate and supply power around the clock, but also save energy and protect the environment, and conveniently and quickly provide a steady stream of green electric power. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Attached Figure 1 Schematic diagram of the system structure of an embodiment of the present invention.

[0015] Attached Figure 2 It is a schematic diagram of the specific structure of an embodiment of the present invention. DETAILED DESCRIPTION

[0016] The present invention is not limited by the following embodiments, and specific implementation methods can be determined based on the technical solution of the present invention and actual conditions.

[0017] In the present invention, for the convenience of description, the description of the relative position relationship of each component is described according to the layout of the drawings in the specification, such as: the position relationship of front, back, up, down, left, right, etc. is determined according to the layout direction of the drawings in the specification.

[0018] The present invention will be further described below in conjunction with embodiments and drawings: Embodiment 1: As attached Figure 1As shown, the photovoltaic, energy storage and diesel generator combined power supply system at the oil test site includes a photovoltaic power generation system, an energy storage system, a diesel power generation system, a controller and a load end; the controller is electrically connected to the photovoltaic power generation system, the energy storage system and the diesel power generation system through a communication bus, the photovoltaic power generation system is electrically connected to the energy storage system, the energy storage system and the diesel power generation system are connected in parallel, the energy storage system and the diesel power generation system are electrically connected to the load end respectively, a load switch is provided on the circuit on the input side of the load end, and the load switch is electrically connected to the controller through a communication bus.

[0019] When there is sufficient sunlight during the day, the photovoltaic power generation system absorbs solar energy to generate electricity and stabilizes the voltage within the voltage range where the energy storage system can work normally. The energy storage system inverts the DC voltage into AC power and then transforms it into AC400V voltage through an isolation transformer to provide power to the load end. At the same time, the excess power generated by the photovoltaic power generation system can be stored in the energy storage system. When there is no sunlight, the energy storage system inverts the DC voltage into AC power and then transforms it into AC400V voltage through an isolation transformer to provide power to the load end. When there is no sunlight and the power of the energy storage battery is lower than the discharge voltage value that allows normal operation, the controller sends a power supply instruction to the diesel power generation system. The diesel power generation system is combined with the photovoltaic power generation system to provide power to the load end, and the AC voltage is rectified into DC power to supplement the energy storage battery, stabilizing the load rate of the diesel power generation system at the optimal power point. When the energy storage battery is fully charged, the controller automatically sends a stop power supply instruction to the diesel power generation system, and the diesel generator set automatically exits the grid-connected operation and shuts down. The load end power continues to be provided by the photovoltaic power generation system and the energy storage system.

[0020] The embodiment of the present invention is a joint application solution of photovoltaic, energy storage and diesel generator sets, which organically combines the above three power generation systems to maximize the use of photovoltaic and energy storage, reduce the utilization rate of diesel generators, and achieve the goals of green, environmental protection and energy saving. The embodiment of the present invention coordinates and manages the photovoltaic controller, energy storage inverter, energy storage battery and diesel generator set through a controller, so that they can work in a coordinated manner, optimize and maximize the energy transfer and utilization rate of each system, and organically combines the above photovoltaic power generation system, energy storage system and diesel power generation system to maximize the use of photovoltaic power generation system and energy storage system, reduce the utilization rate of diesel generator sets, and achieve the goals of green, environmental protection and energy saving.

[0021] Embodiment 2: As attached Figure 2As shown, the controller of the photovoltaic, energy storage and diesel generator set combined power supply system at the oil test site is a programmable controller, and an energy management system (EMS) is provided in the controller for energy management of the power supply system. The photovoltaic, energy storage and diesel generator set combined power supply system at the oil test site also includes an operation terminal, which is electrically connected to the controller. In an embodiment of the present invention, the operation terminal is an operation screen or a computer, and an operation interface of the energy management system (EMS) is provided on the operation terminal.

[0022] When there is no sunlight and the energy storage battery power is lower than the discharge voltage value that allows normal operation, the energy management system (EMS) in the controller sends a power supply command to the diesel generator system. The diesel generator system is connected to the photovoltaic power generation system to provide power to the load end. At the same time, the AC voltage is rectified into DC power to supplement the energy storage battery, stabilizing the load rate of the diesel generator system at the optimal power point. When the energy storage battery is fully charged, the controller automatically sends a stop power supply command to the diesel generator system through the energy management system (EMS), and the diesel generator set automatically exits the grid-connected operation and shuts down. The load end power continues to be provided by the photovoltaic power generation system and the energy storage system.

[0023] The embodiment of the present invention coordinates and manages the photovoltaic controller, energy storage inverter, energy storage battery and diesel generator set in a unified manner through the energy management system (EMS) in the controller, so that they can work in a coordinated manner, optimize and maximize the energy transfer and utilization of each system, and organically combine the above-mentioned photovoltaic power generation system, energy storage system and diesel power generation system to maximize the use of the photovoltaic power generation system and the energy storage system and reduce the utilization rate of the diesel generator set.

[0024] Embodiment 3: As attached Figure 2 As shown, the diesel power generation system of the photovoltaic, energy storage and diesel generator set combined power supply system at the oil test site includes a diesel generator set and a grid-connected switch. The diesel generator set is electrically connected to the grid-connected switch, and the grid-connected switch and the diesel generator set are electrically connected to the controller through a communication bus respectively.

[0025] When there is no sunlight and the energy storage battery is lower than the discharge voltage value that allows normal operation, the energy management system (EMS) in the controller sends a power supply command to the diesel generator set. The diesel generator set is connected to the photovoltaic power generation system to provide power to the load end. At the same time, the energy storage converter rectifies the AC voltage into DC power to replenish the energy storage battery, stabilizing the load rate of the diesel generator set at the optimal power point. When the energy storage battery is fully charged, the controller automatically sends a stop power supply command to the diesel generator set through the energy management system (EMS), and the diesel generator set automatically exits the grid-connected operation and shuts down. The load end power continues to be provided by the photovoltaic power generation system and the energy storage system.

[0026] Embodiment 4: As attached Figure 2As shown, the photovoltaic power generation system of the photovoltaic, energy storage and diesel generator set combined power supply system at the oil test site includes a photovoltaic controller, a photovoltaic switch and a photovoltaic panel assembly. The photovoltaic controller is electrically connected to the photovoltaic panel assembly through the photovoltaic switch, and the photovoltaic controller and the photovoltaic switch are electrically connected to the controller through a communication bus.

[0027] When there is sufficient sunlight during the day, the photovoltaic panel components absorb solar energy to generate electricity. The photovoltaic controller stabilizes the voltage within the voltage range where the energy storage inverter can work normally. The energy storage inverter converts the DC voltage into AC power and then transforms it into AC400V voltage through the isolation transformer to provide power to the load end. At the same time, the excess power generated by the photovoltaic power generation system can be stored in the energy storage battery after being stabilized by the photovoltaic controller. When the energy storage battery is fully charged, the controller automatically sends a stop power supply command to the diesel generator set through the energy management system (EMS), and the diesel generator set automatically exits the grid-connected operation and shuts down. The load end power continues to be provided by the photovoltaic power generation system and the energy storage system.

[0028] Embodiment 5: As attached Figure 2 As shown, the energy storage system of the photovoltaic, energy storage and diesel generator combined power supply system at the oil test site includes an energy storage battery, a battery switch and an energy storage inverter. The energy storage battery is electrically connected to the energy storage inverter through the battery switch, and the battery switch and the energy storage inverter are electrically connected to the controller through a communication bus.

[0029] When there is sufficient sunlight during the day, the photovoltaic panel assembly absorbs solar energy to generate electricity. The photovoltaic controller stabilizes the voltage within the voltage range where the energy storage inverter can work normally. The energy storage inverter inverts the DC voltage into AC power and then transforms it into AC400V voltage through the isolation transformer to provide power to the load end. At the same time, the excess power generated by the photovoltaic power generation system can be stored in the energy storage battery after being stabilized by the photovoltaic controller. When there is no sunlight, the energy storage battery inverts the DC voltage into AC power through the energy storage inverter and then transforms it into AC400V voltage through the isolation transformer to provide power to the load end. When there is no sunlight and the power of the energy storage battery is lower than the discharge voltage value that allows normal operation, the energy management system (EMS) in the controller sends a power supply instruction to the diesel generator set. The diesel generator set is incorporated into the photovoltaic power generation system to provide power to the load end. At the same time, the AC voltage is rectified into DC power through the energy storage inverter to supplement the energy storage battery, stabilizing the load rate of the diesel generator set at the optimal power point. When the energy storage battery is fully charged, the controller automatically sends a stop power supply command to the diesel generator set through the energy management system (EMS). The diesel generator set automatically exits the grid-connected operation and shuts down. The load-side power continues to be provided by the photovoltaic power generation system and the energy storage system.

[0030] The above technical features constitute the embodiments of the present invention, which have strong adaptability and implementation effect. Non-essential technical features can be added or reduced according to actual needs to meet the requirements of different situations.

Claims

1. A photovoltaic, energy storage and diesel generator combined power supply system at the oil test site, characterized in that It includes a photovoltaic power generation system, an energy storage system, a diesel power generation system, a controller and a load end; the controller is electrically connected to the photovoltaic power generation system, the energy storage system and the diesel power generation system through a communication bus, the photovoltaic power generation system is electrically connected to the energy storage system, the energy storage system and the diesel power generation system are connected in parallel, the energy storage system and the diesel power generation system are electrically connected to the load end respectively, a load switch is provided on the circuit on the input side of the load end, and the load switch is electrically connected to the controller through a communication bus.

2. The photovoltaic, energy storage and diesel generator combined power supply system at the oil test site according to claim 1 is characterized in that The controller is a programmable controller, and an energy management system is arranged inside the controller for performing energy management on the power supply system.

3. The photovoltaic, energy storage and diesel generator combined power supply system at the oil test site according to claim 1 or 2 is characterized in that It also includes an operation terminal, which is electrically connected to the controller.

4. The photovoltaic, energy storage and diesel generator combined power supply system at the oil test site according to claim 1 or 2 is characterized in that The operation terminal is an operation screen or a computer.

5. The photovoltaic, energy storage and diesel generator combined power supply system at the oil test site according to claim 1 or 2 is characterized in that The diesel power generation system comprises a diesel generator set and a grid-connected switch, the diesel generator set is electrically connected to the grid-connected switch, and the grid-connected switch and the diesel generator set are electrically connected to the controller via a communication bus respectively.

6. The photovoltaic, energy storage and diesel generator combined power supply system at the oil test site according to claim 3 is characterized in that The diesel power generation system comprises a diesel generator set and a grid-connected switch, the diesel generator set is electrically connected to the grid-connected switch, and the grid-connected switch and the diesel generator set are electrically connected to the controller via a communication bus respectively.

7. The photovoltaic, energy storage and diesel generator combined power supply system at the oil test site according to claim 1, 2 or 6, characterized in that The photovoltaic power generation system includes a photovoltaic controller, a photovoltaic switch and a photovoltaic panel assembly. The photovoltaic controller is electrically connected to the photovoltaic panel assembly through the photovoltaic switch, and the photovoltaic controller and the photovoltaic switch are electrically connected to the controller through a communication bus.

8. The photovoltaic, energy storage and diesel generator combined power supply system at the oil test site according to claim 3 is characterized in that The photovoltaic power generation system includes a photovoltaic controller, a photovoltaic switch and a photovoltaic panel assembly. The photovoltaic controller is electrically connected to the photovoltaic panel assembly through the photovoltaic switch, and the photovoltaic controller and the photovoltaic switch are electrically connected to the controller through a communication bus.

9. The photovoltaic, energy storage and diesel generator combined power supply system for oil testing site according to claim 1, 2, 6 or 8, characterized in that The energy storage system includes an energy storage battery, a battery switch and an energy storage converter. The energy storage battery is electrically connected to the energy storage converter via the battery switch. The battery switch and the energy storage converter are electrically connected to the controller via a communication bus.

10. The photovoltaic, energy storage and diesel generator combined power supply system at the oil test site according to claim 3 is characterized in that The energy storage system includes an energy storage battery, a battery switch and an energy storage converter. The energy storage battery is electrically connected to the energy storage converter via the battery switch. The battery switch and the energy storage converter are electrically connected to the controller via a communication bus.

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