CN116799933A - Wind-solar complementary electric energy supply device - Google Patents
Wind-solar complementary electric energy supply device Download PDFInfo
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- CN116799933A CN116799933A CN202310755767.4A CN202310755767A CN116799933A CN 116799933 A CN116799933 A CN 116799933A CN 202310755767 A CN202310755767 A CN 202310755767A CN 116799933 A CN116799933 A CN 116799933A
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- 230000000295 complement effect Effects 0.000 title claims abstract description 24
- 238000004146 energy storage Methods 0.000 claims abstract description 65
- 238000010248 power generation Methods 0.000 claims abstract description 22
- 238000007600 charging Methods 0.000 claims description 30
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims description 3
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- 230000005611 electricity Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 11
- 239000003990 capacitor Substances 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010277 constant-current charging Methods 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
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- 230000002159 abnormal effect Effects 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010280 constant potential charging Methods 0.000 description 1
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Abstract
The application discloses a wind-solar complementary electric energy supply device, which comprises a power generation module, a controller and an energy storage module, wherein the power generation module comprises a wind driven generator and a solar panel, wind energy and solar energy are respectively converted into electric energy, the energy storage link is borne by the energy storage module, and the energy storage module can be charged and discharged, so that unbalance of energy supply and demand caused by weather and the like is eliminated, and the effect of energy regulation and balancing load is realized in the whole system. The controller converts intermittent and unstable electric energy output by the wind driven generator and the solar panel into stable electric energy to be sent to a direct current load or an alternating current load, and simultaneously charges redundant energy to the energy storage module according to a characteristic curve of the energy storage module, and when the generated electricity cannot meet the load requirement, the controller sends the electric energy of the energy storage module to the load. The scheme realizes intelligent control of the wind-solar complementary electric energy supply device and can safely convey energy to a load.
Description
Technical Field
The application belongs to the technical field of new energy, and particularly relates to a wind-solar complementary electric energy supply device.
Background
The independent wind power generation device cannot provide continuous supply of electric energy in windless weather, and the solar power generation device cannot guarantee continuous supply of electric energy in climates such as night, overcast and rainy days and the like. Wind energy and solar energy have strong complementarity in time and season: the sun is well illuminated in the daytime, the wind is small, and the sun is not illuminated at night and the wind is strong; the sun illumination intensity is high in summer and the wind is small, and the sun illumination intensity is weak in winter and the wind is large. This complementarity allows the wind/light complementary power generation system to have an optimal match in terms of resources. The characteristics can combine independent solar energy and wind energy to form a wind-solar complementary power generation system, and stability and reliability of a power supply system are improved. However, the wind-solar complementary power supply device in the prior art cannot provide intelligent and safe power supply for loads.
Disclosure of Invention
The application aims to provide a wind-solar complementary electric energy supply device, which solves the problem that the prior art cannot provide intelligent and safe power supply for loads.
In order to achieve the above object, the present application provides the following solutions:
the application provides a wind-solar complementary electric energy supply device which comprises a power generation module, a controller and an energy storage module, wherein the controller is used for converting unstable initial voltage into stable output voltage, and the initial voltage is the voltage output by the power generation module;
the controller is respectively connected with the load and the energy storage module and used for respectively charging the load and the energy storage module, and the energy storage module is connected with the load and used for supplying power to the load; the power generation module comprises a wind driven generator and a solar panel.
Optionally, the controller includes: the fan charging module is used for converting the three-phase alternating current output by the wind driven generator into direct current so as to charge the energy storage module; the solar charging module is used for converting unstable direct current output by the solar panel into stable direct current so as to charge the energy storage module; the charge and discharge control module is used for adjusting the working state of the energy storage module according to the sunlight intensity, the wind power and the load change; and the load control module is used for completing intelligent control of the load working state.
Optionally, the fan charging module includes:
the rectification filtering module is used for converting the three-phase alternating current into smooth direct current;
the direct current conversion module is used for converting the smooth direct current into the required direct current;
and the feedback module is used for comparing the voltage output by the direct current conversion module with a preset reference voltage, and changing the duty ratio of the PWM signal according to the comparison result so as to realize the regulation of the output voltage.
Optionally, the energy storage device further comprises a protection module for realizing overcharge and overdischarge protection on the energy storage module.
Optionally, the solar charging module adopts a disturbance observation method to realize maximum power tracking of the solar panel.
Optionally, the energy storage module is connected with a voltage detection module, and is used for monitoring the charging process of the energy storage module.
Optionally, the load comprises a direct current load and an alternating current load, wherein the direct current conversion module is connected with the direct current load, and the energy storage module is connected with the alternating current load through an inverter.
The application has the technical effects that: the application provides a wind-solar complementary electric energy supply device, wherein a power generation module comprises a wind driven generator and a solar panel, wind energy and solar energy are respectively converted into electric energy, and an energy storage link is born by an energy storage module, so that the wind-solar complementary electric energy supply device can charge and discharge, is beneficial to eliminating unbalance of energy supply and demand caused by weather and the like, and plays a role in regulating energy and balancing load in the whole system. The controller converts intermittent and unstable electric energy output by the wind driven generator and the solar panel into stable electric energy to be sent to a direct current load or an alternating current load, and simultaneously charges redundant energy to the energy storage module according to a characteristic curve of the energy storage module, and when the generated electricity cannot meet the load requirement, the controller sends the electric energy of the energy storage module to the load. The scheme realizes intelligent control of the wind-solar complementary electric energy supply device and can safely convey energy to a load.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:
FIG. 1 is a schematic structural diagram of a wind-solar complementary power supply device according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a controller according to an embodiment of the present application;
FIG. 3 is a schematic diagram of a fan charging module according to an embodiment of the present application;
FIG. 4 is a schematic circuit diagram of a rectifying and filtering module according to an embodiment of the present application;
FIG. 5 is a schematic circuit diagram of a DC conversion module according to an embodiment of the present application;
FIG. 6 is a schematic circuit diagram of a solar charging module according to an embodiment of the present application;
FIG. 7 is a schematic diagram of a disturbance observation control flow in an embodiment of the present application;
FIG. 8 is a schematic diagram of a load control module in an embodiment of the application;
FIG. 9 is a schematic diagram of a second order method charging curve of an energy storage module according to an embodiment of the present application;
FIG. 10 is a schematic diagram of a third-order charging curve of an energy storage module according to an embodiment of the present application;
fig. 11 is a schematic diagram of a workflow of a voltage detection module according to an embodiment of the application.
Detailed Description
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
A wind-solar complementary power supply device according to the application is described below with reference to fig. 1-11.
As shown in fig. 1, in this embodiment, a wind-solar complementary power supply device is provided, which includes: the energy storage module is used for converting unstable initial voltage into stable output voltage, and the initial voltage is output by the wind driven generator and the solar panel; the controller is respectively connected with the load and the energy storage module and is used for respectively charging the load and the energy storage module, and the energy storage module is connected with the load and is used for supplying power to the load.
Specifically, a wind driven generator is a device for converting wind energy into electric energy, and mainly comprises a wind machine, a transmission mechanism, a generator and the like. Wind energy is converted into mechanical energy through a wind turbine, then the mechanical energy is transmitted through a transmission mechanism, and finally the mechanical energy is converted into electric energy through a generator.
A solar panel is a power generation device that converts solar energy into electrical energy, the energy conversion basis of which is the photovoltaic effect of the p-n junction of the conductor.
The controller converts intermittent and unstable electric energy output by the wind driven generator and the solar panel into stable electric energy to be sent to a direct current load or an alternating current load, and simultaneously charges redundant energy to the energy storage module group according to the characteristic curve of the energy storage module, and when the generated electricity cannot meet the load requirement, the controller sends the electric energy of the energy storage module to the load.
In the embodiment, the power generation link comprises a wind power generation part and a solar power generation part, wind energy and solar energy are respectively converted into electric energy, and the energy storage link is borne by the energy storage module, so that the energy storage link can be charged and discharged, unbalance of energy supply and demand caused by weather and other reasons is eliminated, and the energy storage link plays a role in regulating and balancing load in the whole system. The solar power generation is stable and reliable, the wind power generation has high randomness and poor power supply reliability, and if the solar power generation and the wind power generation are combined, stable power supply can be realized. Therefore, the wind-solar complementary power generation system can improve the continuity, stability and reliability of power supply of the system, and has been applied to many areas.
Further, the energy storage module is charged as shown in fig. 9-10, and includes:
two-stage charging method: firstly, charging by adopting constant current, and when the voltage reaches a preset value (floating charging voltage), charging by adopting the constant voltage until the charging is completed;
three-stage charging method: the first stage is high-current constant-current charging, the third stage is low-current constant-current charging, and the second stage is constant-voltage charging.
Energy storage function of the energy storage module: because wind energy and solar energy are unstable energy sources, under the condition of sufficient energy sources, redundant energy sources collected by the wind driven generator and the solar panel are stored, and when the wind energy and the solar energy are insufficient, the energy sources are provided for a load; in addition, the voltage stabilizing function of the energy storage module: the output voltage of the wind driven generator and the solar panel is acted by the controller, the output is stable, the voltage change is still large, and the voltage output to the load is more stable through the adjustment of the energy storage module.
In the embodiment, a valve-controlled maintenance-free lead-acid battery is adopted as an energy storage module, the battery is a 60% -80% deep cyclic discharge battery, the thickness of a polar plate is large, and the bearable discharge capacity is 80% of the calibrated capacity. The service life of the battery is 5-10 years.
Further, as shown in fig. 8, load_control is a Load switch control signal, when it is at a high level, the MOSFET transistors Q4, Q5 are turned on, the Load negative electrode Load-is communicated with the battery negative electrode AGND, and the Load starts to operate; when load_control is low, the MOSFET transistors Q4, Q5 are turned off, the Load negative electrode Load is disconnected from the battery negative electrode AGND, and the Load is turned off. In the figure, the voltage stabilizing diodes D9 and D11 are used for protecting the MOSFET transistors Q4 and Q5 and preventing the load control signal from suddenly rising due to abnormal conditions and burning the switching tube.
Further optimizing scheme, as shown in fig. 2, the controller includes: the fan charging module is used for converting unstable three-phase alternating current output by the wind driven generator into stable direct current so as to charge the energy storage module;
as shown in fig. 6, the solar charging module converts unstable direct current output by the solar panel into stable direct current to realize charging of the energy storage module;
the charge and discharge control module is used for adjusting the working state of the energy storage module according to the sunlight intensity, the wind power and the load change; and the load control module is used for completing intelligent control of the load working state. Specifically, the module controls a portion of the regulated circuit of the power module to be directed to a dc load and the remaining portion to be directed to the energy storage module bank for storage. When the generated energy cannot meet the load, the controller sends the electric energy of the energy storage module to the load.
Further, as shown in fig. 3, the fan charging module includes:
the rectification filtering module is used for converting the three-phase alternating current into smooth direct current;
the direct current conversion module is used for converting the smooth direct current into the required direct current;
and the feedback module is used for comparing the voltage output by the direct current conversion module with a preset reference voltage, and changing the duty ratio of the PWM signal according to the comparison result so as to realize the regulation of the output voltage.
Specifically, as shown in fig. 4, although the output voltage of the rectifying circuit is changed from ac to dc, the output dc has a large ripple, contains a large harmonic component, and cannot meet the needs of most electronic circuits and devices. It is therefore necessary to change the pulsating direct current into a smooth direct current by means of a filter circuit after the rectifying circuit.
Further, as shown in fig. 5, the circuit of the dc conversion module includes: a first mos transistor Q1 and a second diode D2 connected in series, and a second mos transistor Q2 and a first diode D1 connected in series; the output end of the mos tube Q1 is connected with the cathode of the first diode D1, the anode of the second diode D2 is connected with the input end of the second diode D2, the anode of the first capacitor C1 is connected with the output end of the mos tube Q1, and the cathode of the first capacitor C1 is connected with the anode of the second diode D2. The same-name end of a first coil of the transformer is connected with the input end of a first mos tube Q1, the non-same-name end of the first coil of the transformer is connected with the positive electrode of a first diode D1, a third diode D3, an inductor L and a resistor R are connected in series with a second coil of the transformer to form a closed loop, a second capacitor is connected with the resistor R in parallel, the resistor R is connected with a fourth diode D4 in parallel, and the negative electrode of the third diode D3 is connected with the negative electrode of the fourth diode D4.
Further optimizing scheme, the device also comprises a protection module for realizing overcharge and overdischarge protection for the energy storage module. For example, wind generators, unloading control of solar panels, lightning protection, solar anti-reverse charging, automatic overvoltage braking, reverse connection of energy storage modules, open circuit protection, and the like.
In a further optimization scheme, as shown in fig. 7, the solar charging module adopts a disturbance observation method to realize maximum power tracking of the solar panel. Specifically, a specified duty cycle is preset, and the current power P is measured 0 And adding disturbance to generate current and voltage change, and measuring U by using a voltage and current sensor 1 ，I 1 And calculate P 1 ＝U 1 ·I 1 . P pair P 0 ，P 1 Comparing if P 1 >P 0 The disturbance is stated to be a change in the direction of the system to its maximum power output, and the corresponding duty cycle is adjusted to continue the disturbance. Otherwise, the disturbance mode is changed, a control signal is sent out through MPPT control, and then the power values before and after the disturbance are compared, and the circulation is carried out until the power value of the system changes at a certain point.
In a further optimized solution, as shown in fig. 11, the energy storage module is connected with a voltage detection module, and is used for monitoring the charging process of the energy storage module.
In a further optimized scheme, stable voltage is provided for the load, the load can be divided into a direct current load and an alternating current load, wherein the direct current conversion module is connected with the direct current load, and the energy storage module is connected with the alternating current load through an inverter.
The present application is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present application are intended to be included in the scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.
Claims (7)
1. The utility model provides a complementary electric energy supply device of scene which characterized in that: the energy storage device comprises a power generation module, a controller and an energy storage module, wherein the controller is used for converting unstable initial voltage into stable output voltage, and the initial voltage is the voltage output by the power generation module;
the controller is respectively connected with the load and the energy storage module and used for respectively charging the load and the energy storage module, and the energy storage module is connected with the load and used for supplying power to the load; the power generation module comprises a wind driven generator and a solar panel.
2. The wind-solar complementary power supply device according to claim 1, wherein: the controller includes:
the fan charging module is used for converting the three-phase alternating current output by the wind driven generator into direct current so as to charge the energy storage module;
the solar charging module is used for converting unstable direct current output by the solar panel into stable direct current so as to charge the energy storage module;
the charge-discharge control module is used for adjusting the working state of the energy storage module according to the sunlight intensity, the wind power and the load change;
and the load control module is used for completing intelligent control of the load working state.
3. The wind-solar complementary power supply device according to claim 2, wherein: the fan module of charging includes:
the rectification filtering module is used for converting the three-phase alternating current into smooth direct current;
the direct current conversion module is used for converting the smooth direct current into the required direct current;
and the feedback module is used for comparing the voltage output by the direct current conversion module with a preset reference voltage, and changing the duty ratio of the PWM signal according to the comparison result so as to realize the regulation of the output voltage.
4. The wind-solar complementary power supply device according to claim 1, wherein: the protection module is used for realizing overcharge and overdischarge protection on the energy storage module.
5. The wind-solar complementary power supply device according to claim 1, wherein: and the solar charging module realizes the maximum power tracking of the solar panel by adopting a disturbance observation method.
6. The wind-solar complementary power supply device according to claim 1, wherein: the energy storage module is connected with a voltage detection module and is used for monitoring the charging process of the energy storage module.
7. A wind-solar complementary power supply according to claim 3, characterized in that: the load comprises a direct current load and an alternating current load, wherein the direct current conversion module is connected with the direct current load, and the energy storage module is connected with the alternating current load through an inverter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310755767.4A CN116799933A (en) | 2023-06-26 | 2023-06-26 | Wind-solar complementary electric energy supply device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310755767.4A CN116799933A (en) | 2023-06-26 | 2023-06-26 | Wind-solar complementary electric energy supply device |
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| Publication Number | Publication Date |
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| CN116799933A true CN116799933A (en) | 2023-09-22 |
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| CN202310755767.4A Pending CN116799933A (en) | 2023-06-26 | 2023-06-26 | Wind-solar complementary electric energy supply device |
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- 2023-06-26 CN CN202310755767.4A patent/CN116799933A/en active Pending
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