CN115789760A - A wind-solar hybrid power generation and heating system based on battery energy storage - Google Patents

Abstract

The invention discloses a wind-solar complementary power generation and heating system based on battery energy storage, which includes a power generation module, an energy storage module, a heating module, a control module and a user terminal. The module uses a battery as an energy storage device. The heating module is mainly composed of an electric heating water storage tank, a circulating heat pump, a user-end heat exchanger and ancillary water supply and return pipes. The control module is a wind-solar hybrid intelligent controller. Data information display and transmission, storage of historical data. Compared with the prior art, the present invention has the advantages of providing a wind-solar complementary power generation and heating system based on battery energy storage that meets policy requirements and social development needs, is clean and pollution-free, and is environmentally friendly.

Description

A wind-solar hybrid power generation and heating system based on battery energy storage

technical field

The invention relates to the technical field of new energy, in particular to a wind-solar complementary power generation and heating system based on battery energy storage.

Background technique

The new energy supply based on solar energy and wind energy is an energy utilization form that meets the needs of the development of the times.

In recent years, in order to cope with environmental pollution, various measures such as "coal to gas" have been proposed in some areas. However, in many areas, especially remote rural areas, due to lagging development and poor infrastructure, there are great difficulties in the implementation of many policies. Coal-burning stoves are still used for heating in winter in rural areas such as northern and northwestern China, which causes serious environmental pollution and poor heating effects. Heating measures in rural areas, especially remote areas, are backward and it is difficult to implement environmental protection policies; traditional heating systems mostly use coal-fired centralized The way of heating, the emission pollutes the air more, and there is also a way of using solar energy for heating, which is less stable. In this context, we propose a wind-solar hybrid power generation and heating system based on battery energy storage, which provides a new way for heating in rural areas, especially in remote mountainous areas. The advantage of this system is that it fully utilizes clean energy, which meets policy requirements and social development needs; wind energy and solar energy are clean and pollution-free, environmentally friendly, and in line with environmental protection policies, but both solar energy and wind energy have the characteristics of instability and randomness. They also have obvious spatio-temporal complementarity.

Based on this, the complementary use of solar energy and wind energy will greatly improve the stability and reliability of the system; using batteries as energy storage devices to ensure the randomness and instability of solar and wind energy will greatly improve the instability of the system. The system is suitable for household heating in rural areas, especially in mountainous areas. It has low installation requirements, is easy to retrofit and implement, and meets energy development goals and policy requirements. Using the time-space complementary characteristics of wind and solar energy for power generation and intelligent control will greatly improve the stability of the system. Greatly improve the utilization rate of solar and wind energy, and reduce the light and wind abandonment rate of wind and solar energy.

Contents of the invention

The technical problem to be solved by the present invention is to provide a clean and pollution-free, environment-friendly wind-solar hybrid power generation and heating system based on battery energy storage that meets policy requirements and social development needs.

In order to solve the above technical problems, the technical solution provided by the present invention is: a wind-solar hybrid power generation and heating system based on battery energy storage, including a power generation module, an energy storage module, a heating module, a control module and a user terminal. The power generation module is mainly composed of Composed of wind power generators and solar photovoltaic panel components, the energy storage module uses batteries as energy storage devices, and the heating module is mainly composed of electric heating water storage tanks, circulating heat pumps, user-side heat exchangers and auxiliary water supply and return pipes, The control module is a wind-solar hybrid intelligent controller, and the client can perform remote monitoring, data information display and transmission, and store historical data.

As an improvement, the user terminal is provided with a mains interface and a DC load interface.

As an improvement, the wind power generating set is composed of a wind wheel, a transmission and speed change mechanism, a generator, a support frame, a windward and speed limiting mechanism, and a hand brake mechanism. The generator is a self-excited alternator, and the solar photovoltaic panel The solar cells in the module are thin-film cells.

As an improvement, the energy storage configuration capacity of the battery needs to meet the energy consumption demand of the load when the system cannot supply energy from solar energy and wind energy within 3 days.

As an improvement, the wind-solar hybrid intelligent controller mainly includes a photoelectric control module, a wind power control module, a storage battery control module, and a data acquisition and monitoring module. The wind-solar hybrid intelligent controller adopts a programmable logic controller (PLC), including a power supply, A central processing unit (CPU), a memory, an input unit, an output unit, and the wind-solar hybrid intelligent controller is provided with a communication interface and a reserved DC charging interface.

As an improvement, the heating module mainly includes an electric heating water tank, a circulating heat pump, a heat exchanger (floor heating coil), pipes and auxiliary mechanisms.

Compared with the prior art, the present invention has the advantages of: the use of wind energy and solar energy to generate heat for heating provides a new way for heating in rural areas, especially remote mountainous areas, and at the same time, the complementary use of wind energy and solar energy improves the stability of the system and the reliability of operation , reducing environmental pollution, while ensuring the heating effect.

Description of drawings

Figure 1 is a flowchart of a wind-solar hybrid power generation and heating system based on battery energy storage.

Fig. 2 is a schematic structural diagram of a wind-solar hybrid power generation and heating system based on battery energy storage.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings.

As shown in Figures 1-2, a wind-solar hybrid power generation and heating system based on battery energy storage includes a power generation module, an energy storage module, a heating module, a control module and a user terminal, and is characterized in that the power generation Generator set and solar photovoltaic panel components, the energy storage module uses a battery as an energy storage device, the heating module is mainly composed of an electric heating water storage tank, a circulating heat pump, a heat exchanger at the user end, and an auxiliary water supply and return pipeline. The control module is a wind-solar hybrid intelligent controller, and the client can perform remote monitoring, data information display and transmission, and store historical data.

The user end is equipped with a mains interface and a DC load interface. The mains interface is used as a backup power supply when the power generation system cannot meet the energy supply under special circumstances, and the direct load interface is used for auxiliary power consumption of equipment.

The wind power generating set is composed of a wind wheel, a transmission and speed change mechanism, a generator, a support frame, a windward and speed limiting mechanism, and a hand brake mechanism. This system is a household heating system. Horizontal axis wind turbine, the blades of the wind turbine are designed with 3 blades, made of carbon fiber composite materials, so that the wind rotor blades face the wind direction at any time, and maximize the ability to obtain wind energy. Since this system is mainly for small-scale wind power generation in household systems machine, so the steering mechanism adopts the tail rudder, and the generator is a self-excited alternator. Since this system supplies energy for the household heating system, and the capacity is below 10KW, a self-excited alternator is used. The solar photovoltaic panel The solar cells in the module use thin-film batteries, which can save materials and reduce costs. Wind power generation is driven by wind energy to rotate the blades of the wind rotor to convert the kinetic energy of the wind into mechanical energy. The generator is driven by connecting the transmission speed change mechanism (speed-up gearbox) to Mechanical energy is converted into electrical energy, and the generated electrical energy is rectified by a rectifier and then distributed and utilized by a controller. Solar energy generation uses solar photovoltaic panels to effectively absorb solar radiation and convert it into electrical energy.

The energy storage configuration capacity of the battery needs to meet the energy consumption demand of the load when the solar and wind energy cannot supply energy for the system within 3 days. The natural instability, randomness and intermittent nature of solar and wind energy make it impossible to continuously and stably supply power to loads. The use of battery energy storage can solve this problem very well, making the system power supply voltage stable and ensuring balanced power supply around the clock. Play energy regulation and balance load power demand.

The wind-solar hybrid intelligent controller mainly includes a photoelectric control module, a wind power control module, a storage battery control module, and a data acquisition and monitoring module. The wind-solar hybrid intelligent controller adopts a programmable logic controller (PLC), including a power supply, a central processing unit (CPU), memory, input unit, output unit, programmable controller will greatly improve the intelligence and convenience of the system through program control, and will also monitor and display the real-time data and operating status of the transmission system in real time, and the IGBT will be driven by the intelligent controller Realize AC/DC inverter, system real-time protection, data reproduction and transmission; control the magnetoelectric speed limit protection of the wind generator; control the speed of the wind generator, the wind and solar hybrid intelligent controller is equipped with a communication interface and a reserved DC charging interface .

The wind-solar hybrid intelligent controller controls the operation mode and on-off status of wind turbines and photovoltaic cell arrays according to the operating conditions of the battery to ensure the normal energy consumption of the load and the safe operation of the system. The function and the working state of the battery are automatically controlled and adjusted, and the adjusted electric energy is sent to the load, and the excess electric energy is sent to the battery for storage. When the power generation cannot meet the load demand, the controller controls the battery to supply power to ensure the stable and continuous operation of the system. When the wind-solar hybrid power generation system and the battery power cannot supply energy under special conditions, the intelligent controller will automatically cut off the inverter to stop the energy supply, and automatically switch to the mains interface to start power supply.

In the intelligent controller, the wind power generation circuit rectifies the electric energy generated by the wind power generator through the rectifier to charge or supply energy to the battery; when the battery voltage is lower than the system setting value, the battery is automatically charged; when the battery voltage reaches the protection voltage Automatic disconnection, the battery is equipped with an automatic supplementary charging function, the photovoltaic power generation circuit uses incremental control of the solar battery pack to charge the battery through the charging controller, and when the charging voltage reaches the set maximum voltage, the corresponding number of photovoltaic power supply branches will be automatically cut off , to prevent overcharging. Harnesses solar power at optimal operating condition.

The battery control module includes overcharge protection, overdischarge protection, recovery connection point, anti-reverse connection, temperature difference compensation, time control, temperature control, etc., and the intelligent controller drives the metal oxide semiconductor field effect transistor (MOSFET) charging module to realize Dual-standard three-stage charging of the battery; according to the system requirements, the intelligent controller controls the output state of the MOSFET module. Between the two groups of batteries, the intelligent controller automatically controls the charge and discharge state according to real-time monitoring and battery voltage status.

Anti-reverse charging function: realized by connecting a diode in series in the power generation circuit;

Anti-overcharge: A discharge transistor is connected in series/parallel in the input circuit. When the wind speed is high or the solar energy is sufficient, when the voltage of the battery pack exceeds 1.25 times the rated voltage, the intelligent controller battery management module controls the battery to stop charging, and the remaining electric energy is unloaded device consumption.

Anti-over-discharge: Set the discharge cut-off voltage to achieve; when the battery voltage is lower than 0.85 times the rated voltage, the intelligent controller controls the inverter to stop working.

The client establishes a remote connection control system between the client and the system through data programming, including real-time data display (such as heating temperature, battery operating status, power generation system operation, historical data), remote control (remote switch, data output, remote control).

The inverter uses a sine wave inverter (the output AC has better quality).

The heating module mainly includes an electric heating water tank, a circulating heat pump, a heat exchanger (floor heating coil), pipelines and auxiliary mechanisms.

Electric heating tube: According to the user's heating temperature requirements, the intelligent controller controls the power generation system and the energy storage system to provide electric energy to heat the heating medium in the heating water tank;

Heating water tank: store and heat the heat exchange medium of the system (this system uses water as the heat exchange medium);

Circulating heat pump: The heated heat exchange medium is passed through the heat pump to promote the system circulation of the heat exchange medium to promote the heat exchange of the system;

Heat exchanger: This system is mainly for indoor heating of houses, so the indoor heat exchanger adopts floor heating coils and sheet heat exchangers as heat exchange equipment.

The system has a mains power access interface reserved. When the wind power generation system and solar power generation system of the system are not enough to provide heating energy, the mains power interface can be connected to ensure the stable heating of the equipment under the influence of special weather. Through the DC interface : For auxiliary equipment.

The operating mode of this system is mainly divided into following several kinds when the present invention is concretely implemented:

1. Solar energy single energy supply mode: When the sun is sufficient during the day and there is no heating demand, the electric energy generated by the solar power generation system is controlled by the wind-solar hybrid intelligent controller to charge the battery, the valve of the heating system is closed, and the circulating heat pump and electric heating water storage tank The power switch is turned off; when heating is required, the intelligent controller controls the heating of the water storage tank and the circulation heat pump starts to run, and the solar power generation system is used first to generate electricity. When the light is on, the controller controls the discharge of the battery to supply energy for the system.

2. Wind energy single energy supply mode: when the system has no heating demand, the electric energy generated by the wind power generation system charges the battery; when heating is required, when the wind energy is sufficient (such as at night or on cloudy days), The intelligent controller controls the wind power generation system to give priority to supplying energy to the system, and the remaining energy is stored in the battery; when the wind power generation system generates insufficient power to supply the system, the intelligent controller controls the battery to supply energy to the system;

3. Wind-solar hybrid energy supply mode: When the wind power generation system and the solar power generation system both supply energy, the wind-solar hybrid intelligent controller automatically controls and distributes the electric energy generated by the two power generation systems according to the operation of the power generation system. In this mode, the electric energy generated by the power generation system is given priority to supply energy to the system. When the system supplies excess energy, the remaining electric energy is stored in the battery. When the system energy supply is sufficient and the batteries are fully charged, the unloader is controlled by the intelligent control system Power consumption is lost.

4. When the power generation system cannot supply energy: the intelligent controller controls the battery to supply energy until the battery voltage reaches the over-discharge protection, the intelligent controller controls the mains switch to automatically turn on, and the mains supplies energy for the system. When the power generation system starts to supply energy, the mains switch is automatically disconnected.

The content not described in detail in this specification belongs to the prior art known to those skilled in the art.

The present invention and its implementations have been described above, and this description is not limiting. What is shown in the drawings is only one of the implementations of the present invention, and the actual structure is not limited thereto. All in all, if a person of ordinary skill in the art is inspired by it, and without departing from the inventive concept of the present invention, without creatively designing a structure and an embodiment similar to the technical solution, it shall fall within the scope of protection of the present invention.

Claims (6)

1. A wind-solar hybrid power generation and heating system based on battery energy storage, including a power generation module, an energy storage module, a heating module, a control module and a user end, characterized in that: the power generation module is mainly composed of wind power generators and solar photovoltaic panel components The energy storage module uses a battery as an energy storage device. The heating module is mainly composed of an electric heating water storage tank, a circulating heat pump, a user-side heat exchanger and an auxiliary water supply and return pipeline. The control module is a wind-solar hybrid intelligent The controller, the client end can perform remote monitoring, data information display and transmission, and store historical data. 2. A wind-solar hybrid power generation and heating system based on battery energy storage according to claim 1, characterized in that: said user end is attached with a mains interface and a DC load interface. 3. A wind-solar hybrid power generation and heating system based on battery energy storage according to claim 1, characterized in that: the wind power generator set is composed of a wind wheel, a transmission and speed change mechanism, a generator, a support frame, a windward and a speed limiter mechanism and hand brake mechanism, the generator is a self-excited alternator, and the solar cell in the solar photovoltaic panel assembly is a thin-film battery. 4. A wind-solar hybrid power generation and heating system based on battery energy storage according to claim 1, characterized in that: the energy storage configuration capacity of the battery needs to meet the energy consumption of the load when the system cannot supply energy from solar energy and wind energy within 3 days need. 5. A wind-solar hybrid power generation and heating system based on battery energy storage according to claim 1, characterized in that: the wind-solar hybrid intelligent controller mainly includes a photoelectric control module, a wind power control module, a battery control module, data acquisition and Monitoring module, the wind-solar hybrid intelligent controller adopts a programmable logic controller (PLC), including a power supply, a central processing unit (CPU), a memory, an input unit, and an output unit, and the wind-solar hybrid intelligent controller is equipped with a communication interface, Reserve a DC charging interface. 6. A wind-solar hybrid power generation and heating system based on battery energy storage according to claim 1, characterized in that: the heating module mainly includes an electric heating water tank, a circulating heat pump, a heat exchanger (floor heating coil), pipes and Subsidiary body composition.

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