High-efficiency intelligent wind-solar-diesel storage micro power station

Abstract

The utility model provides a high-efficiency intelligent wind-light-diesel-storage micro-power station, which relates to the field of wind-light-diesel-storage micro-grid power stations and comprises a box body used for providing support, a diesel generator cabin used for installing a diesel generator, a high-voltage power distribution cabin used for installing power distribution equipment and an energy storage cabin used for installing a battery. An inner cavity of the diesel generator cabin is fixedly connected with a variable-frequency direct-current diesel generator set used for power generation, and a hybrid inverter used for AC / DC conversion and a wind driven generator controller used for controlling wind power generation are installed in an inner cavity of the high-voltage power distribution cabin. According to the utility model, the EMS controller is adopted to carry out energy scheduling in a unified manner, is respectively connected with the hybrid inverter, the wind driven generator controller and the three-phase AC ammeter through RS485, and is respectively connected with the frequency conversion DC diesel generator set and the BMS of the energy storage battery through CAN2.0B, so that a unified control architecture is formed, the control complexity is reduced, and the control precision is improved at the same time.

Description

Technical Field

[0001] This utility model belongs to the field of wind-solar-diesel-storage microgrid power stations, specifically a high-efficiency intelligent wind-solar-diesel-storage microgrid power station. Background Technology

[0002] A wind-solar-diesel-storage microgrid power station is a distributed energy system that integrates wind power, photovoltaic power, diesel power generation, and energy storage. It can operate on-grid or off-grid through intelligent control. The power station uses an energy management system (EMS) to intelligently dispatch electricity according to the output of different energy sources and load demand. When there is sufficient sunshine or strong wind, wind power and photovoltaic power are used first, and excess electricity is stored. When natural energy is insufficient, the energy storage system releases electricity. If the demand is still not met, the diesel generator starts to provide power support. It is especially suitable for use in areas with weak power grids.

[0003] Currently, commercially available wind-solar-diesel-storage microgrid systems mainly consist of traditional fixed-frequency diesel generator sets, photovoltaic inverters, energy storage inverters, energy storage batteries, wind turbine controllers, paralleling cabinets, paralleling controllers, and energy management systems (EMS). Among these, the traditional diesel generator sets, energy storage inverters, photovoltaic inverters, and wind turbine controllers all output three-phase AC power. The AC power from the three-phase sources is first connected in parallel in the paralleling cabinet through the paralleling controller. Through the overall coordination and scheduling of the EMS, the three-phase power output is finally achieved. This method belongs to AC parallel output control and is a traditional physical integration method of multiple power sources. However, this method has problems such as system complexity, high control difficulty, poor control accuracy, slow response speed, high energy consumption, and low power density.

[0004] In summary, this utility model provides a high-efficiency intelligent wind-solar-diesel-storage micro power station to solve the above problems. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] A high-efficiency intelligent wind-solar-diesel-storage micro power station includes a supporting enclosure, a diesel generator compartment for mounting a diesel generator, a high-voltage distribution compartment for mounting power distribution equipment, and an energy storage compartment for mounting batteries. The diesel generator compartment has a variable frequency DC diesel generator set for power generation fixedly connected to its interior. The high-voltage distribution compartment has a hybrid inverter for AC / DC conversion, a wind turbine controller for controlling wind power generation, a three-phase AC meter for detecting three-phase power, an EMS controller for energy dispatch, and two display screens for parameter display, one for displaying parameters of the variable frequency DC diesel generator set and the other for displaying parameters of the micro power station. The energy storage compartment contains energy storage batteries for storing electrical energy.

[0007] Furthermore, in this utility model, the EMS controller is connected to the hybrid inverter, the wind turbine controller, and the three-phase AC meter via RS485, and the EMS controller is connected to the BMS of the variable frequency DC diesel generator set and the energy storage battery via CAN2.0B.

[0008] Furthermore, in this utility model, the exterior of the housing is also provided with a photovoltaic panel DC input interface, a wind turbine generator three-phase input interface, an external three-phase load AC output interface, and a mains power three-phase AC input interface.

[0009] Furthermore, in this utility model, the variable frequency DC diesel generator set is a permanent magnet synchronous water-cooled generator, the energy storage battery is composed of high-rate lithium-ion batteries, and the battery pack is realized by connecting different packs in series and parallel.

[0010] Furthermore, in this invention, the hybrid inverter consists of a DC-DC converter with MPPT function, a bidirectional DC-DC converter, and a bidirectional DC-AC converter, and the EMS controller is a system controller developed based on the LIUNIX system.

[0011] Furthermore, in this utility model, the variable frequency DC diesel generator set is connected to the display screen of the diesel generator via CAN2.0B, and the EMS controller is connected to the display screen of the micro power station via RS485.

[0012] Beneficial effects: This utility model has the following beneficial effects:

[0013] This invention integrates various functional components into the enclosure of a wind-solar-diesel-storage microgrid, which is divided into a diesel generator compartment, a high-voltage power distribution compartment, and an energy storage compartment. This makes the structure more compact and reasonable, reduces unnecessary components and connections, and simplifies the overall system structure. Energy dispatch is unified by using an EMS controller. It is connected to the hybrid inverter, wind turbine controller, and three-phase AC meter via RS485, and to the BMS of the variable frequency DC diesel generator set and energy storage battery via CAN2.0B. This forms a unified control architecture, reduces the complexity of control, and improves control accuracy. It effectively solves the problems of system complexity, high control difficulty, poor control accuracy, slow response speed, high energy consumption, and low power density of traditional wind-solar-diesel-storage microgrid systems on the market. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the intelligent wind-solar-diesel-storage integrated microgrid power station of this utility model;

[0015] Figure 2 This is a schematic diagram of the microgrid power station system architecture of this utility model;

[0016] Figure 3 This is a schematic diagram of the communication architecture of this utility model;

[0017] Figure 4 This is a flowchart of the communication system of this utility model.

[0018] In the picture:

[0019] 100. Wind-solar-diesel-storage micro power station; 110. Container; 120. Diesel generator compartment; 121. Variable frequency DC diesel generator set; 130. High-voltage power distribution compartment; 131. Hybrid inverter; 132. Wind turbine controller; 133. Three-phase AC meter; 134. EMS controller; 135. Display screen; 140. Energy storage compartment; 141. Energy storage battery. Detailed Implementation

[0020] To better understand the technical content of this utility model, specific embodiments are described below in conjunction with the accompanying drawings. Various aspects of this utility model are described in this disclosure with reference to the accompanying drawings, which illustrate numerous illustrative embodiments. The embodiments of this disclosure are not necessarily defined to include all aspects of this utility model. It should be understood that the various concepts and embodiments described above, as well as those described in more detail below, can be implemented in any of many ways, because the concepts and embodiments disclosed in this utility model are not limited to any particular implementation. Furthermore, some aspects of this utility model can be used alone or in any suitable combination with other aspects disclosed in this utility model.

[0021] Example 1

[0022] like Figures 1-4 As shown, this is the first embodiment of the present invention. This embodiment provides a high-efficiency intelligent wind-solar-diesel-storage micro power station, including a wind-solar-diesel-storage micro power station 100, comprising a housing 110 for providing support, a diesel generator compartment 120 for installing a diesel generator, a high-voltage distribution compartment 130 for installing power distribution equipment, and an energy storage compartment 140 for installing batteries. The inner cavity of the diesel generator compartment 120 is fixedly connected to a variable frequency DC diesel generator set 121 for generating electricity. The inner cavity of the high-voltage distribution compartment 130 is equipped with a hybrid inverter 131 for AC / DC conversion, a wind turbine generator controller 132 for controlling wind power generation, a three-phase AC meter 133 for detecting three-phase power, an EMS controller 134 for energy dispatch, and a display screen 135 for parameter display. There are two display screens 135, one for displaying parameters of the variable frequency DC diesel generator set 121 and the other for displaying parameters of the micro power station. The energy storage compartment 140 is equipped with an energy storage battery 141 for storing electrical energy.

[0023] like Figures 1-4As shown, the diesel generator compartment 120 is connected in parallel to the DC bus of the energy storage compartment 140 and the DC output bus of the wind turbine controller 132 on a single busbar, and connected to the DC input terminal of the hybrid inverter 131. The wind turbine controller 132, the variable frequency DC diesel generator set 121, the hybrid inverter 131, and the energy storage battery 141 are efficiently integrated to form an integrated microgrid power station. The surface of the enclosure 110 has reserved multiple photovoltaic DC interfaces, a three-phase wind turbine interface, two three-phase load interfaces, a mains interface, and a parallel control low-voltage interface. The EMS controller 134 collects load and component parameters in real time, and controls the power of the hybrid inverter 131, wind power generation, photovoltaic power generation, and the start / stop and power of the variable frequency DC diesel generator set 121 to achieve optimal energy distribution, meeting the output requirements of the three-phase load. It can also transmit relevant data... According to data transmitted via 4G network to the cloud platform and mobile APP, by adopting a high-voltage DC parallel operation scheme, the variable frequency DC diesel generator set 121 directly outputs high-voltage DC power and is connected in parallel with the energy storage battery 141 and the wind turbine controller 132, eliminating the need for an inverter. By using the variable frequency DC diesel generator set 121, the power can be output in a variable frequency manner, with the characteristics of controlled power, high control accuracy, and fast response speed. By using a hybrid inverter 131, the variable frequency DC diesel generator set 121, energy storage battery 141, wind power, and photovoltaic are integrated on the DC side and finally uniformly inverted to AC output, thereby eliminating the need for parallel operation cabinets and parallel operation controllers, realizing worry-free parallel operation control, improving system efficiency, and effectively solving the problems of system complexity, high control difficulty, poor control accuracy, slow response speed, high energy consumption, and low power density of traditional wind-solar-diesel-storage microgrid systems on the market.

[0024] Example 2

[0025] Reference Figures 1-4 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0026] In this embodiment, the EMS controller 134 is connected to the hybrid inverter 131, the wind turbine controller 132, and the three-phase AC meter 133 via RS485, and the EMS controller 134 is connected to the BMS of the variable frequency DC diesel generator set 121 and the energy storage battery 141 via CAN2.0B.

[0027] The exterior of the enclosure 110 is also equipped with a DC input interface for photovoltaic panels, a three-phase input interface for wind turbine generators, an AC output interface for external three-phase loads, and a three-phase AC input interface for mains power.

[0028] The variable frequency DC diesel generator set 121 uses a permanent magnet synchronous water-cooled generator, and the energy storage battery 141 is composed of high-rate lithium-ion batteries, and the battery pack is realized by connecting different packs in series and parallel.

[0029] The hybrid inverter 131 consists of a DC-DC converter with MPPT function, a bidirectional DC-DC converter, and a bidirectional DC-AC converter. The EMS controller 134 is a system controller developed based on the LIUNIX system.

[0030] The variable frequency DC diesel generator set 121 is connected to the display screen 135 of the diesel generator via CAN2.0B, and the EMS controller 134 is connected to the display screen 135 of the micro power station via RS485.

[0031] like Figures 1-4 As shown, an EMS controller 134 is used for unified energy dispatching. It is connected to the hybrid inverter 131, wind turbine controller 132, and three-phase AC meter 133 via RS485, and to the BMS of the variable frequency DC diesel generator set 121 and energy storage battery 141 via CAN2.0B, forming a unified control architecture. This reduces control complexity and improves control accuracy. The variable frequency DC diesel generator set 121 outputs DC power, and the hybrid inverter 131 has AC / DC conversion capabilities. This DC output control method avoids the complex phase and frequency parameter matching problems of AC parallel operation, further reducing control difficulty and improving control accuracy. The EMS controller 134 is directly connected to each key component, enabling it to quickly acquire the operating parameters and status information of each component and issue control commands in a timely manner. When changes in wind power generation or load demand are detected, the EMS controller 134 can quickly adjust the power generation of the variable frequency DC diesel generator set 121 or the charging and discharging state of the energy storage battery 141, thereby achieving rapid response. The system employs high-rate lithium-ion batteries, which offer advantages such as fast charging and discharging speeds and high energy density. These batteries enable the storage and release of large amounts of electrical energy in a short time, further improving the power density of the micro-power station and helping to reduce system energy consumption. The charge / discharge rate can reach 3C continuous charging and discharging. Battery packs are implemented through series and parallel connections of different packs, allowing for a power configuration of 50-120 kWh. Relevant information is fed back to the EMS controller 134 via a CAN bus. A permanent magnet synchronous water-cooled generator is selected as the variable frequency DC diesel generator set 121. Permanent magnet synchronous generators are characterized by high efficiency and high power density. Water cooling effectively reduces generator temperature, ensuring efficient operation, thereby reducing energy consumption and increasing power density. The wind turbine controller 132 primarily receives the three-phase input from the wind turbine and outputs high-voltage DC power. It also transmits relevant wind power parameters to the EMS controller 134 via an RS485 bus. A three-phase AC meter 133 is connected in series in the three-phase output load lines to detect the system's three-phase power, voltage, and current parameters.

[0032] During use, two photovoltaic DC inputs are reserved for connecting to the photovoltaic panel DC power supply to achieve maximum power following control of the photovoltaic input power. One three-phase AC wind power generation interface is reserved for external connection of three-phase wind turbine power supply and input to the wind turbine generator controller 132 inside the high-voltage distribution compartment 130 to achieve wind turbine power generation control. Two three-phase AC load output ports are reserved, which are internally connected in parallel with copper plates and connected to the three-phase output interface of the hybrid inverter 131 for load output connection. A three-phase AC meter 133 is used in the middle to detect the load power, voltage, current and power consumption statistics. One three-phase mains power input interface is reserved for mains power input to realize mains power charging and grid feedback functions. Two display screens 135 are reserved for displaying system parameters and operating parameters of the variable frequency DC diesel generator set 121.

[0033] After starting, the variable frequency DC diesel generator set 121 converts the chemical energy of diesel fuel into electrical energy and outputs DC power, providing stable power support for the power station. It plays a crucial role when sunlight and wind are insufficient. The photovoltaic panels outside the enclosure 110 are connected to the power station via a DC input interface, converting solar energy into DC power, which is directly input into the power station system. The wind turbine is connected to the power station via a three-phase input interface outside the enclosure 110. The wind turbine controller 132 controls and regulates wind power generation, converting wind energy into electrical energy and integrating it into the power station system. The hybrid inverter 131 inside the high-voltage distribution compartment 130, through a DC-DC converter with MPPT function, enables the photovoltaic panels to output maximum power under different lighting conditions. A bidirectional DC-DC converter is used to achieve DC-DC step-up / step-down conversion. A bidirectional DC-AC converter is responsible for bidirectional conversion between DC and AC power to meet the needs of different equipment and loads. The three-phase AC meter 133 monitors the power output of the power station in real time, providing data support for energy dispatch. When the power generation exceeds the load consumption, the excess energy is stored in the energy storage battery 141. When the power generation is insufficient, the energy storage battery 141 releases energy to supply power to the load, thus balancing the supply and demand of electricity. The EMS controller 134 is the core control unit of the entire power station. Based on the detected power, energy, battery status, and other information, the EMS controller 134 rationally dispatches various energy sources to ensure the stable operation and efficient energy utilization of the power station. The variable frequency DC diesel generator set 121 is connected to the diesel generator's display screen 135 via CAN2.0B to display the diesel generator's operating parameters in real time. The EMS controller 134 is connected to the micro-power station's display screen 135 via RS485 to display the operating parameters of the entire micro-power station, facilitating monitoring and management by operators.

[0034] All standard parts used in this application can be purchased from the market, and can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. The control method is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art and is common knowledge in the field. Since this application is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail in this application.

[0035] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Those skilled in the art to which this invention pertains can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of this invention shall be determined by the claims.

Claims

1. A high-efficiency intelligent wind-solar-diesel-storage micro power station, characterized in that: include, The wind-solar-diesel-storage micro power station (100) includes a housing (110) for providing support, a diesel generator compartment (120) for installing a diesel generator, a high-voltage power distribution compartment (130) for installing power distribution equipment, and an energy storage compartment (140) for installing batteries. The inner cavity of the diesel generator compartment (120) is fixedly connected to a variable frequency DC diesel generator set (121) for power generation. The inner cavity of the high voltage power distribution compartment (130) is equipped with a hybrid inverter (131) for AC / DC conversion, a wind turbine controller (132) for controlling wind power generation, a three-phase AC meter (133) for detecting three-phase power, an EMS controller (134) for energy dispatch, and a display screen (135) for parameter display. There are two display screens (135), which are used for displaying the parameters of the variable frequency DC diesel generator set (121) and the parameters of the micro power station, respectively. The energy storage compartment (140) is equipped with an energy storage battery (141) for storing electrical energy.

2. The high-efficiency intelligent wind-solar-diesel-storage micro power station as described in claim 1, characterized in that: The EMS controller (134) is connected to the hybrid inverter (131), the wind turbine controller (132), and the three-phase AC meter (133) via RS485. The EMS controller (134) is connected to the BMS of the variable frequency DC diesel generator set (121) and the energy storage battery (141) via CAN2.0B.

3. The high-efficiency intelligent wind-solar-diesel-storage micro power station as described in claim 1, characterized in that: The exterior of the enclosure (110) is also equipped with a photovoltaic panel DC input interface, a wind turbine three-phase input interface, an external three-phase load AC output interface, and a mains three-phase AC input interface.

4. The high-efficiency intelligent wind-solar-diesel-storage micro power station as described in claim 1, characterized in that: The variable frequency DC diesel generator set (121) is a permanent magnet synchronous water-cooled generator, and the energy storage battery (141) is composed of high-rate lithium-ion batteries, and the battery pack is realized by connecting different packs in series and parallel.

5. The high-efficiency intelligent wind-solar-diesel-storage micro power station as described in claim 1, characterized in that: The hybrid inverter (131) consists of a DC-DC converter with MPPT function, a bidirectional DC-DC converter, and a bidirectional DC-AC converter. The EMS controller (134) is a system controller developed based on the LIUNIX system.

6. The high-efficiency intelligent wind-solar-diesel-storage micro power station as described in claim 1, characterized in that: The variable frequency DC diesel generator set (121) is connected to the display screen (135) of the diesel generator via CAN2.0B, and the EMS controller (134) is connected to the display screen (135) of the micro power station via RS485.

Images