CN103986224A - Wind, solar and electricity complementary type portable power source - Google Patents

Abstract

A wind-power complementary mobile power supply belongs to the technical field of new energy applications. It includes a power generation system, an energy optimization management or balance management controller, an energy storage system, and a power conversion device; the power generation system is a wind power generation system and a solar power generation system, and the wind power generation system is installed on the top of the mobile power supply or at the front end of the mobile power supply. The solar power generation system is installed on the top of the mobile power supply or on both sides of the mobile power supply box that can be directly exposed to sunlight; the energy optimization management or balance management controller adopts an energy optimization management or balance control strategy to optimize the balance of energy from different sources At the same time, the service life of the battery is extended; the key components in the energy storage system are batteries, supercapacitors and DC/DC converters, and the supercapacitors are connected in series with DC/DC to improve the performance of the energy storage system; the inverter of the power conversion device The inverter converts DC power into AC power for AC loads.

Description

A wind-power complementary mobile power supply

Technical field:

The invention relates to a wind-power complementary mobile power supply, in particular to an energy storage device based on a battery-supercapacitor, which is organically combined with new energy sources such as wind power generation and solar power generation, belongs to the field of new energy power supply, and is suitable for mobile Workstations (such as newsrooms, shops, etc.), field emergency mobile vehicles, and marine vehicles such as ships have a wide range of applications.

Background technique:

At present, the battery supplies power to most of the electricity-consuming facilities. The battery capacity is limited, and the charging and discharging speed is limited. Especially in field emergency and sea transportation, if the battery is insufficient or there is no battery charging station, it will bring a lot of work demand. inconvenient.

In terms of energy storage, supercapacitors have the advantages of high specific power and long charge and discharge life. The energy storage device composed of supercapacitors and batteries is used to protect the batteries, while prolonging the service life of the batteries and reducing costs.

In terms of power supply, solar energy and wind energy, as sustainable green and clean energy, have a wide range of storage. The comprehensive and complementary utilization of new energy sources such as solar energy and wind energy is applied to mobile power supplies, which solves the problem of charging energy storage devices. Discontinuity of power supply caused by a single green and clean energy source.

Invention content:

The purpose of the present invention is to propose a wind-power complementary mobile power supply, the purpose of which is that the battery-supercapacitor energy storage device can supply normal power to the load under the comprehensive complementarity of wind power generation and solar power generation in special environments such as field emergency.

In order to achieve the above purpose, the technical solution of the present invention is: a wind-power complementary mobile power supply, including a power generation system, an energy optimization management or balance management controller, an energy storage system, a power conversion device, and a DC/DC boost circuit; The power generation system includes a wind power generation system and a solar power generation system; the energy storage system includes a storage battery, a supercapacitor and a DC/DC converter; the power conversion device is an inverter; the output end of the power generation system, the energy storage The system inputs are all connected to the energy optimization or balance management controller by wires.

The wind power generator of the wind power generation system is installed on the front of the mobile power supply box through a fastening mechanism or on the top of the box through a vertical rod, so that it is easy to disassemble when the wind power is not used for power generation.

The solar panel of the solar power generation system is made into a curved or flat shape according to the shape of the installation location, and the components of the solar panel are laid flat on the top of the mobile power box and are designed to be folded.

The battery-supercapacitor energy storage system is designed to improve the performance of the energy storage system; structurally, the supercapacitor is connected in series with DC/DC, and the circuit composed of the supercapacitor and DC/DC is then connected in parallel with the battery pack to buffer and stabilize the battery pack terminal voltage; there is a sequence of charging, the priority is to charge the supercapacitor, the excess energy is charged to the battery, and the supercapacitor can also charge the battery; the output terminal of the energy storage system is connected to the input terminal of the DC/DC step-up circuit .

The output end of the DC/DC step-up circuit directly drives a DC load, or is converted into AC power by an inverter circuit to drive an AC load.

The energy optimization management or balance management controller adopts two strategies of energy optimization management or balance control, and the energy optimization management optimally distributes the electric energy converted by solar panels and wind power generators to the supercapacitor and battery in the energy storage device group; the balanced control strategy balances and matches the unbalanced voltage of the single battery terminals, while ensuring the service life of the battery.

The present invention has the following outstanding advantages:

1. Solar energy and wind energy have good complementarity, and wind and solar hybrid power generation system makes up for the resource defects of wind power and photovoltaic independent systems; the installation and layout of solar panels and wind generators in the present invention are diverse and widely used.

2. Supercapacitors have the advantages of high specific power and long charge and discharge life. The battery-supercapacitor energy storage system is used to improve the performance of the energy storage system.

3. Through energy optimization management or balanced management, the energy from different sources is balanced to improve the charging and discharging capacity of the battery while ensuring the service life of the battery.

Description of drawings:

FIG. 1 is a schematic structural diagram of a wind-power complementary mobile power supply.

Fig. 2 is a structural schematic diagram of a wind-power complementary outdoor emergency mobile power supply.

Fig. 3 is a schematic structural diagram of a wind-power complementary mobile ship.

FIG. 4 is a schematic structural diagram of the balance management system.

FIG. 5 is a topology diagram of capacitor equalization.

Specific implementation plan:

Below in conjunction with accompanying drawing, preferred example method of the present invention is described in detail.

Referring to Figure 1, the wind-power complementary mobile power supply includes wind generators, solar panels, energy optimization management or balance management controllers, batteries, super capacitors, DC/DC, DC/DC boost circuits, inverter circuits, DC loads and AC loads. Wind turbines, solar panels, batteries, and supercapacitors are all connected to energy optimization management or balance management controllers through wires; supercapacitors are connected in series with DC/DC, and then connected in parallel with batteries, both of which are connected to DC/DC booster circuits ; The output end of the DC/DC step-up circuit can directly drive the DC load, and can also be converted into AC to drive the AC load through the inverter circuit.

In the present invention, the energy storage device is loaded in a sealed battery cabinet, and can be designed as a mobile type according to the application; at the same time, it has good ventilation, heat dissipation, and ventilation functions, and can discharge the energy generated during the use of the battery in time. Gas and heat; the battery cabinet is distributed in multiple layers, each layer can place multiple groups of batteries and supercapacitor modules in parallel, and a fixed bracket is installed in the energy storage device to avoid movement of the energy storage device during transportation.

Fig. 2 is an embodiment of a wind-power complementary mobile power supply on a field emergency mobile vehicle.

In this embodiment, considering the situation of special operations in the field, the wind-power complementary mobile power supply is designed as a mobile power supply vehicle. The energy storage control and other devices are designed as an integral structure and installed on the chassis of the mobile power vehicle; the solar panel is designed to be foldable and installed on the roof of the vehicle, and the size of the roof of the mobile power vehicle determines the size of the solar panel; wind power generation The machine is designed to be easy to disassemble and assemble. It can be installed on the front of the mobile power supply vehicle box through a fastening mechanism or on the top of the box through a vertical rod. When wind power is not used, it can be easily disassembled.

Fig. 3 is an embodiment of a wind-power complementary mobile power supply in a ship's marine transportation.

This embodiment is basically the same as the above-mentioned embodiment, and the special feature is that the energy storage and other devices of the wind-power complementary mobile power supply are designed as a portable box structure with rollers at the bottom, and are placed in the cabin to improve the portability during transportation and use. The layout of wind generators and solar panels can be determined according to the space and layout of the ship. Considering that as much energy as possible can be obtained from wind and solar energy, the position of solar panels can be arranged on the top or deck of the ship. The shape can be made into a curved surface or a flat shape according to the installation location; the wind generator can be installed on the deck through a longitudinal bar with sufficient strength, and a small-volume wind rotor breeze or turbine wind power can be selected. After the wind turbines and solar panels are positioned, they are connected to portable energy storage devices.

FIG. 4 is a structural diagram of the balance system, which is an embodiment of balance management in the present invention.

The energy storage device is composed of single cells connected in series or in parallel. Factors such as individual differences in the cells and temperature differences cause the battery terminal voltage to be unbalanced; the balanced management strategy can avoid the deterioration of the unbalanced trend and improve the cycle life of the battery pack.

Referring to Figure 4, the balance management system is mainly composed of a controller, an equalizer, a battery pack, voltage acquisition and signal processing devices, where the battery pack is composed of multiple single cells connected in series, and the equalizer is connected in parallel at both ends of the battery pack. The specific working process of the system is as follows: wind generators and solar panels respectively convert wind energy and solar energy into electrical energy, and output a given charging current through the controller according to different battery charging requirements; the controller controls the current, voltage and The state information such as temperature is monitored in real time, and the difference between the monitoring result and the preset state signal is compared, and the corresponding driving signal is output to control the on-off of the equalization circuit; through the equalization optimization control strategy, the performance and cycle life of the battery pack are improved.

Figure 5 is a topology diagram of capacitor equalization, taking two single cells as an example to illustrate the advantages of equalization management.

Assuming that the voltage V _B1 of battery B1 is higher than the voltage V _B2 of B2, the two SPDT switches are located at a, and the battery B1 charges the capacitor; after a certain charging time, the two SPDT switches switch to b, and the capacitor charges the battery B2 Charging; after repeated switching, the B1 voltage V _B1 is equal to the B2 voltage V _B2 . In the capacitor balancing topology, energy is exchanged through capacitors, and the balancing circuit has no energy loss; balancing management improves battery charging and discharging capabilities, while ensuring battery life.

Claims (5)

1. A wind and electricity complementary mobile power supply, characterized in that it includes a power generation system, energy optimization management or balance management controller, energy storage system, power conversion device, DC/DC booster circuit; the power generation system includes wind power generation system and a solar power generation system; the energy storage system includes a storage battery, a supercapacitor and a DC/DC converter; the power conversion device is an inverter; the output end of the power generation system and the input end of the energy storage system are connected to each other through wires Energy optimization management or balance management controllers are connected. 2. The wind-power complementary mobile power supply according to claim 1, characterized in that, the wind generator of the wind power generation system is installed on the front part of the mobile power supply box through a fastening mechanism or through a vertical rod Installed on the top of the box, it is easy to disassemble when the wind power is not used. 3. The wind-power complementary mobile power supply according to claim 1, characterized in that, the solar panel of the solar power generation system is made into a curved surface or a flat type according to the shape of the installation position, and the components of the solar panel are laid flat on the mobile The top of the power supply is foldable. 4. The wind-power complementary mobile power supply according to claim 1, wherein the energy storage system mainly includes a storage battery, a supercapacitor and a DC/DC converter, and the supercapacitor is connected in series with the DC/DC, A circuit composed of a supercapacitor and DC/DC is connected in parallel with the battery pack to buffer and stabilize the terminal voltage of the battery pack; the output end of the energy storage system is connected to the input end of the DC/DC step-up circuit. 5. The wind-power complementary mobile power supply according to claim 4, characterized in that the output end of the DC/DC booster circuit directly drives the DC load, or is converted into AC power by the power conversion device to drive the AC load.