Novel wind and light storage, generation and power conversion system

Abstract

The utility model relates to the technical field of electric power systems, and discloses a novel wind and light storage, generation and power conversion system, which comprises an input part, a power conversion part, a grid-connected inversion part and a central control part, the input part and an input power source comprise commercial power, photovoltaic power generation and wind power generation, and are combinations of any two of at least three power sources, such as commercial power + photovoltaic power generation, photovoltaic power generation and wind power generation. Commercial power and wind power generation and photovoltaic and wind power generation are adopted; according to the utility model, the wind power input source and the photovoltaic input source are additionally arranged, so that the device has the advantage that commercial power, wind power and photoelectricity are organically integrated to supply power to a rear charger, and the problems of single input source and poor adaptability are solved; and secondly, after the mains supply is cut off, the alternating current is stored in the battery through wind power generation and photovoltaic power generation, and also can be supplied to an inverter for grid-connected power generation.

Description

Technical Field

[0001] The utility model relates to the technical field of power systems, and specifically relates to a new type of wind-solar-storage-power-generation and power conversion system. Background Technique

[0002] At present, the power conversion systems (cabinets) on the market are simply charging and power conversion systems. Users put the batteries to be charged into the power conversion cabinet and take away the fully charged batteries. This system has a single function and a narrow application range. First, it cannot be used in places without electricity; second, when the power conversion frequency is low, the fully charged batteries are idle, and the utilization rate is relatively low; third, it is not green and environmentally friendly, and does not consider green energy sources such as photovoltaic and wind energy; fourth, it does not realize the energy storage function and cannot give full play to the maximum efficiency of the batteries.

[0003] At present, the power conversion systems on the market only have one input power source, i.e., commercial power, and cannot be used in places without commercial power. Moreover, the power conversion systems on the market can only be used as a general charging system and cannot invert the energy stored in the batteries into alternating current to supply other temporary devices. That is, it cannot be used as a backup power supply system and does not have the function of grid-connected power generation. In the case of no commercial power, some manufacturers' power conversion equipment cannot maintain the power conversion operation. Therefore, we propose a new type of wind-solar-storage-power-generation and power conversion system to solve this problem. Content of the Utility Model

[0004] The purpose of the utility model is to provide a new type of wind-solar-storage-power-generation and power conversion system, which has the advantage of organically integrating commercial power, wind power and photovoltaic power to supply power to the subsequent chargers, so as to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A new type of wind-solar-storage-power-generation and power conversion system, which includes four parts: an input part, a power conversion part, a grid-connected inversion part and a central control part;

[0006] The input part, the input power sources include commercial power, photovoltaic power and wind power generation, and at least any two combinations of the three, such as commercial power + photovoltaic power, commercial power + wind power generation, photovoltaic power + wind power generation;

[0007] The power conversion part, the power conversion part is composed of a charger, a battery pack and a charging control, and its main function is to complete the charging of the power conversion battery, battery detection, battery replacement operation and other functions;

[0008] The grid-connected inversion part, the grid-connected inversion part is composed of a DC / DC booster and a grid-connected inverter. It completes the inversion of the battery electric energy or the excess energy output by the charger into grid-connected power generation, or supplies it to other loads, and completes the functions of green energy power generation or energy storage backup power supply;

[0009] The central control part consists of a communication module, a monitoring module, and other functional units, which form the integrated control part of this system.

[0010] Preferably, the charger is powered by the power supply of the input part, and this power supply is any one or a combination of two of commercial power, photovoltaic power generation, and wind power generation. The input part is controlled by an input switching board to supply the effective power to the power conversion part at the back end. Among them, wind power generation and photovoltaic power generation take precedence over commercial power to make full use of green energy.

[0011] Preferably, the communication networking module uses a 4G module or Ethernet to build the communication between this machine and the operation platform, and build the communication with the mobile phone APP.

[0012] Preferably, the monitoring module consists of a keyboard, a touch screen, and a display screen, and is used for setting, consulting, displaying information, inputting instructions, etc.

[0013] Preferably, the central control part further includes input / output interfaces, which are used to complete the transmission of analog quantities, digital quantities, and status quantities between the central control board (ARM board) and each functional block.

[0014] Preferably, the wind-solar-storage-power-conversion system uses CAN and RS485 communication interfaces to connect each functional block of this system together through a bus, which is convenient for the interaction of digital information and realizes various controls.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] The wind-solar-storage-power-conversion system proposed by the present utility model has the advantages of organically integrating commercial power, wind power, and photovoltaic power to supply power to the subsequent charger by adding a wind power input source and a photovoltaic input source, solves the problem of poor adaptability due to a single input source, and also adds an energy storage link to invert the temporarily unused battery energy into alternating current to feed back to the power grid or supply off-grid loads. Secondly, after the commercial power supply stops, through wind power generation and photovoltaic power generation, in addition to being stored in the battery, it can also supply the inverter to generate power and be connected to the grid. Finally, when all three input sources do not work, this system will invert the electricity stored in the battery to supply the load for use as a backup power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model and do not constitute a limitation to the present utility model. In the drawings:

[0018] Figure 1 is the block diagram of the wind-solar-power-conversion system of the present utility model;

[0019] Figure 2 is the schematic diagram of the input part circuit of the present utility model;

[0020] Figure 3 This is a schematic diagram of the circuit for the battery swapping part of the present utility model;

[0021] Figure 4 This is a schematic diagram of the circuit for the inverter part of the present utility model;

[0022] Figure 5 This is a system block diagram of the central control part of the present utility model;

[0023] Figure 6 This is a principle topology diagram of the multi-source input switching board of the present utility model;

[0024] Figure 7 This is a system block diagram of the charging and battery swapping part of the present utility model;

[0025] Figure 8 This is a main circuit topology diagram of the grid-connected inverter of the present utility model;

[0026] Figure 9 This is a system block diagram of the central control part of the present utility model. Detailed implementation manners

[0027] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0028] As Figures 1 to 9 shown, a new type of wind-solar-storage-power-generation and battery swapping system includes four parts: an input part, a battery swapping part, a grid-connected inverter part, and a central control part;

[0029] Input part, the input power sources include commercial power, photovoltaic power, and wind power, at least any two combinations of the three, such as commercial power + photovoltaic power, commercial power + wind power, photovoltaic power + wind power;

[0030] Battery swapping part, the battery swapping part consists of a charger, a battery pack, and a charging control. Its main functions are to complete the charging of the battery for swapping, battery detection, battery swapping operation, etc. (batteries for two-wheel vehicles, batteries for three-wheel vehicles);

[0031] Grid-connected inverter part, the grid-connected inverter part consists of a DC / DC boost converter and a grid-connected inverter. It completes the function of inverting the battery power or the excess energy output by the charger into grid-connected power generation (the battery and the charger are directly connected in parallel), or supplying other loads, achieving green energy power generation, or the function of a storage backup power supply;

[0032] Central control part: The central control part consists of a communication module, a monitoring module, and other functional units to form the integrated control part of this system, completing functions such as power generation, charging, energy storage, power conversion, grid-connected inversion, and backup power supply of this system, and realizing a small power system with unattended operation, remote operation, and remote control.

[0033] In this embodiment, the charger is powered by the power supply of the input part, and this power supply is any one or a combination of two of mains power, photovoltaic power generation, and wind power generation. The input part is controlled by an input switching board to supply the effective power to the power conversion part at the back end. Among them, wind power generation and photovoltaic power generation take precedence over mains power to make full use of green energy.

[0034] In this embodiment, the communication networking module uses a 4G module or Ethernet to build the communication between this machine and the operation platform, and build the communication with the mobile phone APP to facilitate viewing the operation status of this system anytime and anywhere.

[0035] In this embodiment, the monitoring module consists of a keyboard, a touch screen, and a display screen, and is used for setting, consulting, displaying information, inputting instructions, etc.

[0036] In this embodiment, the central control part also includes input / output interfaces, which are used to complete the transmission of analog quantities, digital quantities, and status quantities between the central control board (ARM board) and each functional block.

[0037] In this embodiment, the wind-solar-storage-power-conversion system uses CAN and RS485 communication interfaces to connect each functional block of this system together through a bus, facilitating the interaction of digital information and realizing various controls.

[0038] In this embodiment, the first part of the wind-solar-storage-power-conversion system is as follows:

[0039] Multi-source input switching board, which completes the switching of mains power input, wind power input, and photovoltaic input. In the case of having wind power and photovoltaic power, it takes these as the main power sources. But when neither of them is available, it switches to the mains power supply mode;

[0040] When none of the three is available, the energy stored in the battery is inverted into alternating current for the load to use. The function of the backup power supply is completed. The principle topology diagram is as Figure 6 shown. Among them, FN represents wind power input. Since the output of a small power wind turbine is unstable, it is rectified and filtered and then connected in parallel with the photovoltaic input after the rectifier filter circuit. NTC1 (thermistor), F1 (fuse), MOV1 (varistor), LG1 (common mode inductor), and BAG (rectifier bridge) form the wind power generation input circuit. The function of the rectifier bridge is to rectify the alternating current with changing voltage and frequency into pulsating direct current, and then filter it into real direct current through the filter circuit composed of LIN1, E1, and E2;

[0041] PV represents the photovoltaic input, with a required voltage range between 150 - 350 VDC, and the power is determined by the system power; the photovoltaic input passes through the input circuit composed of NTC2 (thermistor), F2 (fuse), MOV2 (varistor), LG2 (common mode inductor) and D1 (antireflection diode) to reach E1 and E2 (electrolytic capacitors), and is connected in parallel with the wind power input;

[0042] UTIL represents the mains input, 220 / 230 VAC - 50 HZ mains, and the mains input circuit is jointly composed of NTC3 (thermistor), F3 (fuse), MOV3 (varistor) and LG3 (common mode inductor).

[0043] The RK3 relay (two pairs of contacts) conducts the wind power / photovoltaic input or the mains input to the VIN - 1 and NIN - 2 buses. There are 6 - 12 chargers connected to this bus. This charger is the charger for the battery swapping part, which charges the battery packs in each compartment and supplies power to the subsequent DC / DC boost converter at the same time.

[0044] The three - way input power supply is connected to this board through a rotary switch.

[0045] In this embodiment, the second part of the wind - solar - storage - power - battery - swapping system is as follows:

[0046] The charging and battery - swapping part, its principle block diagram is as Figure 7 shown. Usually, the battery - swapping part has 6 compartments, 8 compartments, 10 compartments, 12 compartments, etc.; each battery - swapping compartment is equipped with a charger, a battery pack, and a controller to complete functions such as charging, battery swapping, billing, settlement, protection, and communication.

[0047] In this embodiment, the third part of the wind - solar - storage - power - battery - swapping system is as follows:

[0048] Grid - connected inverter part: The DC / DC boost main circuit, the topology diagram of the grid - connected inverter main circuit is as Figure 8 shown. Among them, one DC / DC boost module is configured for each battery compartment of the battery bank, and the output ends of multiple boost modules are connected in parallel;

[0049] Figure 8 In it, LBST2 (inductor), Q8 (MOSFET), D3 (fast recovery diode), C4 (electrolytic capacitor) and R4 (current - sensing resistor) form a first - stage DC / DC boost module, with an output voltage of about 200 VDC, supplying power to the subsequent grid - connected inverter boost circuit. The diodes D4 (antireflection diode) D6┄DN (at the output end of each boost module) are used for antireflection when the outputs of multiple boost modules are connected in parallel;

[0050] Figure 8The front - stage boost circuit of the inverter is composed of LBST1 (inductor), R3 (current - sensing resistor), Q1 (MOSFET), D2 (fast - recovery diode) and C2 (electrolytic capacitor), which boosts 200VDC to 350 - 450V again to meet the requirements of the subsequent inverter circuit;

[0051] Figure 8 In it, Q2, Q3, Q5, Q6 (MOSFETs) form a bridge - type single - phase inverter bridge circuit. Q4, Q7 (MOSFETs) form a free - wheeling circuit. In the figure, LINV1 (inductor), LINV2 (inductor) and C3 (film capacitor) form an inverter filter circuit;

[0052] Figure 8 In it, RK1 and RK2 are output switches. After the inverter circuit works normally and the grid - connection preparation is completed, this relay is closed to complete the grid - connection power generation of the inverter.

[0053] In this embodiment, the fourth part of the wind - solar - storage - power - conversion system is as follows:

[0054] The central control part, which is the brain of the whole system, completes unattended functions such as the control of the switching board in the first part, the control of the power - conversion part in the second part, the control of the boost module in the third part, the control of the grid - connected inverter, the whole - machine detection, information reporting, human - machine interaction, remote control, etc., as Figure 9 shown.

[0055] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non - exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "comprising an..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the said element.

[0056] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A new type of wind-solar-storage-power generation and power conversion system, characterized in that: It includes four parts: an input part, a battery swapping part, a grid-connected inverter part, and a central control part; Input part: The input power source includes mains power, photovoltaic power, and wind power, and is at least any two combinations among the three, such as mains power + photovoltaic power, mains power + wind power, photovoltaic power + wind power; Battery swapping part: The battery swapping part consists of a charger, a battery pack, and a charging control. Its main functions are to complete the charging of the swapped battery, battery detection, and battery swapping operation functions; Grid-connected inverter part: The grid-connected inverter part consists of a DC / DC boost converter and a grid-connected inverter, and is used to invert the battery power or the excess energy output by the charger into grid-connected power generation, achieving green energy power generation or the function of a backup energy storage power supply; Central control part: The central control part is composed of a communication module and a monitoring module to form the integrated control part of this system.

2. The novel wind-solar-storage-power generation and power conversion system according to claim 1, wherein: The charger is powered by the power source of the input part, which can be any one or two combinations of mains power, photovoltaic power generation, and wind power generation. The input part is controlled by an input switching board to supply the effective power to the subsequent battery swapping part. Among them, wind power generation and photovoltaic power generation take precedence over mains power to make full use of green energy.

3. A novel wind-solar-storage-power generation and power conversion system according to claim 1, characterized in that: The communication networking module uses a 4G module or Ethernet to establish communication between this machine and the operation platform and establish communication with the mobile phone APP.

4. A novel wind-solar-storage-power generation and power conversion system according to claim 1, characterized in that: The monitoring module consists of a keyboard, a touch screen, and a display screen, and is used to set, view, display information, and input commands.

5. A novel wind-solar-storage-power generation and power conversion system according to claim 1, characterized in that: The central control part also includes input / output interfaces, which are used to complete the transmission of analog quantities, digital quantities, and status quantities between the central control board (ARM board) and each functional block.

6. A novel wind-solar-storage-power generation and power conversion system according to claim 1, characterized in that: The wind-solar-storage power generation and battery swapping system uses CAN and RS485 communication interfaces to connect each functional block of this system together through a bus, facilitating the interaction of digital information and realizing control.

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