CN115955014A - High-voltage side electric field and mechanical energy composite energy obtaining device and method - Google Patents
High-voltage side electric field and mechanical energy composite energy obtaining device and method Download PDFInfo
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- CN115955014A CN115955014A CN202211676967.2A CN202211676967A CN115955014A CN 115955014 A CN115955014 A CN 115955014A CN 202211676967 A CN202211676967 A CN 202211676967A CN 115955014 A CN115955014 A CN 115955014A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Abstract
The invention discloses a high-voltage side electric field and mechanical energy composite energy obtaining device, which relates to the technical field of intelligent power grids and comprises the following components: the high-voltage side energy-taking module is used for acquiring high-voltage side electric field energy and mechanical energy and converting the high-voltage side electric field energy and the mechanical energy into alternating current energy; and the power management module is used for rectifying, reducing voltage, filtering and stabilizing voltage of the converted alternating current electric energy and then supplying power to the power grid state monitoring device. The invention also provides a high-voltage side electric field and mechanical energy composite energy-taking power supply method. The electric field energy source of the invention is alternating current electric field energy generated by load current in the power grid, the mechanical energy is mainly wind energy and raindrop energy in natural environment, the two kinds of energy are converted into alternating current electric energy through the energy taking module, and then the alternating current electric energy is rectified, stepped down, filtered, stabilized and the like through the power management module to supply power for the power grid monitoring device.
Description
Technical Field
The invention relates to the technical field of smart power grids, in particular to a high-voltage side electric field and mechanical energy composite energy obtaining device and method.
Background
Under the large background of rapid development of the smart power grid, the power grid presents a wide-area and massive state monitoring device, and a stable and reliable power supply technology is the basic guarantee for the normal operation of the power grid state monitoring device. At present, the mainstream energy taking mode of the high-voltage side power grid state monitoring device is divided into energy taking from the outside of a system to be tested, such as wind energy, photovoltaic energy taking, laser power supply and the like; energy is obtained from the inside of a system to be tested, and the energy obtaining method mainly comprises electric field energy obtaining, magnetic field energy obtaining, temperature difference energy obtaining and the like. The energy taking technologies have single energy source, the external environment and the system running state have great influence on energy taking, and the power supply reliability needs to be improved. The combined self-energy taking can realize single energy taking and combined energy taking through the integrated energy taking device and the power management module, thereby well improving the power supply reliability of the monitoring device and increasing the output power.
The current transformer is used for supplying power, the current transformer is the most typical one of current induction energy taking, but the power supply performance is influenced by fluctuation of primary side current, so that the problems of serious heating, dead power supply area, oversaturation of a magnetic circuit and the like exist; the coil type energy taking device is heavy in weight and can increase the stress of the lead; in addition, the energy source of the traditional magnetic field energy taking is a magnetic field generated by load current, and when power failure faults such as tripping, line shutdown and the like occur on a high-voltage side, the monitoring device cannot work normally. The photovoltaic energy taking conversion efficiency is low, the photovoltaic energy taking device is very easily influenced by environmental factors such as temperature, seasons, illumination intensity, floating and sinking, the problem of intermittent power supply exists, the size of the energy taking device is large, and regular maintenance is needed. The output energy of the capacitor voltage-dividing type energy taking is limited, the output characteristic is easily influenced by stray capacitance and ambient temperature, and the insulation safety problem between the energy taking power supply and a subsequent working circuit can be influenced. The temperature difference energy taking has the defects of low energy density, insufficient reliability, limited use scene and the like. In addition, the energy acquisition technologies have the defects of single energy source, large influence by the system running state or the surrounding environment and poor power supply reliability, so that the self-energy acquisition technology for a single energy source has certain limitation. In the prior art, a combined power supply for cooperatively supplying power to a current transformer and an artificial light source is provided, but the artificial light source needs a low-voltage side power supply for supplying power, is low in economical efficiency and is not suitable for a power grid in a remote area.
The energy taking mode mainly applied to the power supply technology of the existing power grid state monitoring device has the defects of single energy source, need to improve the stability, generally insufficient power, poor tolerance of an energy taking device and the like. The combined self-energy-taking technology is basically a simple combination of several energy-taking technologies, and has low integration degree and complex circuit design. Especially for the special working environment and insulation requirements of the high-voltage side, the power supply problem of the high-voltage side state monitoring device is a key problem to be solved urgently.
Disclosure of Invention
In order to solve the defects of the prior art, aiming at the defects of single energy source, low integrated degree of combined self-energy taking and the like of the current mainstream self-energy taking technology, a high-voltage side electric field and mechanical energy composite energy taking device and method are provided, and electric field energy and mechanical energy existing in a power grid environment are captured through the same energy taking device structure.
The technical scheme provided by the invention is as follows:
a high-voltage side electric field and mechanical energy combined energy taking device comprises:
the high-voltage side energy-taking module is used for acquiring high-voltage side electric field energy and mechanical energy and converting the high-voltage side electric field energy and the mechanical energy into alternating current energy;
and the power management module is used for rectifying, reducing voltage, filtering and stabilizing voltage of the converted alternating current electric energy and then supplying power to the power grid state monitoring device.
As a further technical solution of the present invention, the high-pressure side energy-taking module: the device comprises a wind energy or raindrop energy taking device, an encapsulation shell, a buffer layer, a friction material layer, a rotor electrode, a stator electrode, an insulating layer and a power transmission line;
the wind energy or raindrop energy taking device is arranged on the packaging shell and connected with the outer side of the packaging shell, a groove is formed in the inner side of the packaging shell, a buffer layer is embedded in the groove, and a rotor electrode is arranged on the inner side of the buffer layer; the inner side of the rotor electrode is provided with a friction material layer, the inner side of the friction material layer is provided with a stator electrode, the inner side of the stator electrode is provided with an insulating layer, and the inner side of the insulating layer is a power transmission line.
As a further technical scheme of the invention, the buffer layer is made of foam cotton materials.
The wind energy or raindrop energy taking device adopts a further technical scheme that the wind energy or raindrop energy taking device is a wind cup, a wind plate and an arc-shaped blade.
The wind energy or raindrop energy taking device is one or more than one, and is horizontally arranged and packaged on the outer side of the outer shell.
According to a further technical scheme of the invention, the friction material layer is one of polytetrafluoroethylene, nylon fiber and fluorinated ethylene propylene.
As a further technical scheme of the invention, the insulating layer is polytetrafluoroethylene.
The further technical scheme of the invention is that the rotor electrode and the stator electrode are of flat plate-shaped, grid-shaped or net-shaped arc structures.
As a further technical scheme of the invention, the packaging shell is in a cylindrical, prismatic or cuboid structure.
The invention also provides a high-voltage side electric field and mechanical energy composite energy obtaining method, which comprises the following steps:
acquiring electric field energy and mechanical energy of a high-voltage side by using the high-voltage side energy-taking module, and converting the electric field energy and the mechanical energy of the high-voltage side into alternating current electric energy;
and the converted alternating current energy is rectified, stepped down, filtered and stabilized to supply power for the power grid state monitoring device.
The beneficial effects of the invention are as follows:
1. the electric field energy source of the invention is alternating current electric field energy generated by load current in the power grid, the mechanical energy is mainly wind energy and raindrop energy in natural environment, the two kinds of energy are converted into alternating current electric energy through the energy taking module, and then the alternating current electric energy is rectified, stepped down, filtered, stabilized and the like through the power management module to supply power for the power grid monitoring device.
2. The wind cup is connected with the rotor electrode through the insulating shell and the foam cotton buffer layer, and drives the rotor electrode to rotate after the wind cup captures wind energy.
3. The upper end and both sides of the foam cotton buffer layer are embedded in the packaging shell through the grooves of the packaging shell, the bottom end of the foam cotton buffer layer is fixed on the rotor electrode, and the foam cotton buffer layer can increase the friction effect between the rotor electrode and the stator electrode besides the buffering and damping effects of the rotor electrode in the rotating process.
4. The friction material layer is located between the rotor electrode and the stator electrode, and the friction material layer wraps the top and the two sides of the stator electrode, so that the friction material layer is used as a friction electrification material, and the point discharge of the stator electrode under high field intensity can be effectively avoided.
5. The stator electrode wraps the friction material layer, the bottom of the stator electrode is fixed on the insulating layer, and the insulating layer wraps the periphery of the power transmission line to play a role in reliable insulation.
Drawings
Fig. 1 is a structural diagram of a high-voltage side electric field and mechanical energy combined energy-taking device provided by the invention;
FIG. 2 is a schematic structural diagram of a high-side energy-taking module according to the present invention;
fig. 3 is an equivalent circuit diagram of the high-voltage side electric field induction energy-taking provided by the invention;
FIG. 4 is a graph of voltage output waveforms for trapping electric field energy and mechanical energy in accordance with the present invention;
FIG. 5 is a flow chart of a method for obtaining energy by combining an electric field and mechanical energy at a high-voltage side according to the present invention;
shown in the figure:
1. the wind cup comprises a wind cup body 2, a packaging shell 3, a foam cotton buffer layer 4, a friction material layer 5, a rotor electrode 6, a stator electrode 7, an insulating layer 8 and a power transmission line.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
Referring to fig. 1, a high-voltage side electric field and mechanical energy combined energy extraction device includes:
the high-voltage side energy-taking module is used for acquiring high-voltage side electric field energy and mechanical energy and converting the high-voltage side electric field energy and the mechanical energy into alternating current energy;
and the power management module is used for rectifying, reducing voltage, filtering and stabilizing voltage of the converted alternating current electric energy and then supplying power to the power grid state monitoring device.
The invention relates to a flow chart of a high-voltage side electric field and mechanical energy composite energy taking device and a method. The electric field energy source is alternating current electric field energy generated by load current in a power grid, and the mechanical energy mainly comes from wind energy or raindrop energy in natural environment. The two kinds of energy are converted into alternating current energy through the energy taking module, and then are subjected to rectification, voltage reduction, filtering, voltage stabilization and other processing through the power management module to supply power to the power grid monitoring device.
The invention provides a brand-new high-voltage side self-energy-taking device structure, which combines an electric field induction energy-taking technology and a friction nano-generator technology by taking Maxwell displacement current as an energy-taking principle, has two energy capture modes of an electric field and a friction nano-generator, and can simultaneously capture electric field energy and mechanical energy in the surrounding environment of a power transmission line; the resulting displacement current component based on the time varying electric field and dielectric polarization and the mechanical energy in the surrounding environment are captured by the cups and rotor electrodes. The equipment has simple structure, high integration degree and strong tolerance; the coil and the iron core are not provided, so that the volume is small, the weight is light, and the actual engineering installation is convenient; the maintenance can be avoided periodically, and the operation, maintenance and overhaul costs are reduced; the self-powered capability and reliability of the power grid state monitoring device are improved and the output power is increased by combining two energy taking modes of an electric field and mechanical energy. The energy taking module is packaged through the packaging shell, so that the tolerance of the energy taking device is improved; the energy taking device has no coil and iron core, so that the weight is light, and the stress influence on the power transmission line is reduced.
Referring to fig. 2, the high-voltage side energy-taking module in the embodiment of the present invention includes a wind energy or raindrop energy-taking device 1, an encapsulation casing 2, a foam buffer layer 3, a friction material layer 4, a rotor electrode 5, a stator electrode 6, an insulating layer 7, and a power transmission line 8, wherein a wind cup is disposed on the encapsulation casing and connected to an outer side of the encapsulation casing, a groove is disposed on an inner side of the encapsulation casing, the buffer layer is embedded in the groove, and the rotor electrode is disposed on an inner side of the buffer layer; the inner side of the rotor electrode is provided with a friction material layer, the inner side of the friction material layer is provided with a stator electrode, the inner side of the stator electrode is provided with an insulating layer, and the inner side of the insulating layer is a power transmission line.
The buffer layer is made of foam cotton materials, the wind energy or raindrop energy taking device 1 is directly fixed on the packaging shell 2, the wind energy or raindrop energy taking device 1 is connected with the rotor electrode 5 through the insulating shell 2 and the foam cotton buffer layer 3, and the wind energy or raindrop energy taking device 1 captures wind energy and then drives the rotor electrode 5 to rotate; the upper end and two sides of the foam cotton buffer layer 3 are embedded in the packaging shell 2 through the grooves of the packaging shell 2, the bottom end of the foam cotton buffer layer 3 is fixed on the rotor electrode 5, and the foam cotton buffer layer 3 not only has the functions of buffering and damping the rotor electrode 5 in the rotating process, but also can increase the friction effect between the rotor electrode 5 and the stator electrode 6; the friction material layer 4 is positioned between the rotor electrode 5 and the stator electrode 6, and the friction material layer 4 wraps the top and two sides of the stator electrode 6, so that the friction material layer is used as a friction electrification material and can effectively avoid point discharge of the stator electrode 6 under high field intensity; the top of the rotor electrode 5 is fixed on the foam cotton buffer layer 3, the bottom of the rotor electrode 5 is contacted with the friction material layer 4, and the number of the rotor electrodes 5 is half of that of the stator electrodes 6; the stator electrode 6 is wrapped in the friction material layer 4, and the bottom of the stator electrode is fixed on the insulating layer 7; the insulating layer 7 wraps the periphery of the power transmission line 8, and plays a reliable insulating role.
As shown in fig. 3, the principle of capturing mechanical energy by the composite self-powered device described in the present invention is: the friction material layer 4, the rotor electrode 5 and the stator electrode 6 form 6 groups of completely identical friction nano generators. After the wind energy or raindrop energy taking device 1 captures wind energy or raindrop energy, the rotor electrode 5 is driven to rotate, and complete contact and sliding friction between the rotor electrode 5 and the friction material layer 4 occur. Because the material of the rotor electrode 5 and the material of the friction material layer 4 have different electron affinities, equal amounts of different-sign charges appear on the contact surface, so that the charges between two adjacent stator electrodes 6 are transferred, and the conversion from mechanical energy to electric energy is realized.
As shown in fig. 4, the principle of capturing electric field energy by the composite self-powered device described in the present invention is: parasitic capacitances Ceg and Cce exist between the stator electrode 6 and the ground and the transmission line 8, due to the existence of the transmission line voltage Uac, a displacement current Iac is generated on the parasitic capacitances, and the stator electrode captures electric field energy through the displacement current.
The wind energy or raindrop energy taking device is connected with the packaging shell, the wind energy or raindrop energy taking device is a wind cup, and a wind plate and an arc-shaped blade can also be connected with the packaging shell to convert the wind energy or raindrop energy into mechanical energy.
The packaging shell structure in the embodiment of the invention can be a cylinder, and can also be a prism, a cuboid and other structures.
The friction layer material in the embodiment of the invention can be one of polytetrafluoroethylene, nylon fiber, fluorinated ethylene propylene and the like. The insulating layer material may be polytetrafluoroethylene and other materials.
In the embodiment of the invention, the grid-shaped or net-shaped arc-shaped structure can be used for replacing the rotor electrode and the stator electrode with the flat-plate arc-shaped structure, so that the coupling capacitance between the energy taking polar plate and the power transmission line is increased, and the capacity of capturing electric field energy is improved.
The energy taking device in the embodiment of the invention can form an energy taking device array through a series-parallel connection structure, so that the integral output power of the energy taking device is improved.
Referring to fig. 5, the invention further provides a high-voltage side electric field and mechanical energy composite energy obtaining method, which includes the following steps:
s1, acquiring high-voltage side electric field energy and mechanical energy by using a high-voltage side energy-taking module, and converting the high-voltage side electric field energy and the mechanical energy into alternating current energy;
and S2, rectifying, reducing voltage, filtering and stabilizing the converted alternating current electric energy, and then supplying power to the power grid state monitoring device.
The invention replaces the iron core and the coil of the traditional magnetic field energy taking with the light rotor electrode and the light stator electrode, lightens the weight of the energy taking device and reduces the stress influence of the power transmission line.
The invention is based on Maxwell displacement current as an energy obtaining principle, and uses the combination of electric field induction energy obtaining and friction nanometer generator energy obtaining, thus realizing single electric field induction energy obtaining, single friction nanometer generator energy obtaining, and electric field induction and friction nanometer generator combined complementary energy obtaining, realizing energy coupling, obviously improving the power supply reliability of the monitoring device, and increasing the output power. The problem that the conventional power supply mode cannot normally supply power when power failure faults such as tripping, line shutdown and the like occur at the high-voltage side is avoided.
According to the invention, the energy taking device is effectively isolated from the external environment through the full packaging shell, the influence of the external environment such as floating and sinking, rainwater and other adverse factors on the energy taking module is eliminated, the operation and maintenance cost is reduced, and the service life is prolonged; and simple structure is compact, integrates the degree height, has improved the tolerance of getting the ability device, and small light in weight is convenient for actual engineering installation.
The wind cup designed by the invention can convert wind energy into mechanical energy and can also realize measurement of wind speed.
In order to intuitively illustrate the output effect of the present invention, a finite element model is established. The simulation result is shown in fig. 4, and the periodic variation of the stator electrode potential is caused by the grid working voltage and the triboelectric effect. The energy-taking device can effectively capture electric energy and mechanical energy and convert the electric energy and the mechanical energy into alternating current output voltages with peak values of 900V and 850V respectively.
The present invention has been described in detail, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the gist of the present invention within the knowledge of those skilled in the art. Many other changes and modifications may be made without departing from the spirit and scope of the invention. It is to be understood that the invention is not to be limited to the specific embodiments, but only by the scope of the appended claims.
Claims (10)
1. The utility model provides a high pressure side electric field and mechanical energy complex get can device which characterized in that includes:
the high-voltage side energy-taking module is used for acquiring high-voltage side electric field energy and mechanical energy and converting the high-voltage side electric field energy and the mechanical energy into alternating current energy;
and the power management module is used for rectifying, reducing voltage, filtering and stabilizing voltage of the converted alternating current electric energy and then supplying power to the power grid state monitoring device.
2. The high-side electric field and mechanical energy combined energy extracting device as claimed in claim 1, wherein the high-side energy extracting module: the device comprises a wind energy or raindrop energy taking device, an encapsulation shell, a buffer layer, a friction material layer, a rotor electrode, a stator electrode, an insulating layer and a power transmission line;
the wind energy or raindrop energy taking device is arranged on the packaging shell and connected with the outer side of the packaging shell, a groove is formed in the inner side of the packaging shell, a buffer layer is embedded in the groove, and a rotor electrode is arranged on the inner side of the buffer layer; the friction material layer is arranged on the inner side of the rotor electrode, the stator electrode is arranged on the inner side of the friction material layer, the insulating layer is arranged on the inner side of the stator electrode, and the power transmission line is arranged on the inner side of the insulating layer.
3. The high-side electric field and mechanical energy composite energy-taking device as claimed in claim 2, wherein the buffer layer is made of foam cotton material.
4. The high-side electric field and mechanical energy combined energy taking device according to claim 2, wherein the wind energy or rain energy taking device is a wind cup, a wind plate or an arc-shaped blade.
5. The high-side electric field and mechanical energy combined energy taking device as claimed in claim 2, wherein the one or more wind energy or rain energy taking devices are horizontally arranged and packaged outside the outer shell.
6. The high-side electric field and mechanical energy combined energy extraction device as claimed in claim 2, wherein the friction material layer is one of polytetrafluoroethylene, nylon fiber and fluorinated ethylene propylene.
7. The high-side electric field and mechanical energy combined energy extraction device according to claim 2, wherein the insulating layer is polytetrafluoroethylene.
8. The high-side electric field and mechanical energy combined energy obtaining device as claimed in claim 2, wherein the rotor electrode and the stator electrode are of flat plate-shaped, grid-shaped or net-shaped arc structures.
9. The high-side electric field and mechanical energy combined energy extraction device according to claim 2, wherein the packaging shell is in a cylindrical, prismatic or rectangular structure.
10. A high-voltage side electric field and mechanical energy combined energy extraction method, which is characterized in that the high-voltage side electric field and mechanical energy combined energy extraction device as claimed in any one of claims 1 to 9 is adopted, and the method comprises the following steps:
acquiring high-voltage side electric field energy and mechanical energy by using the high-voltage side energy-taking module, and converting the high-voltage side electric field energy and the mechanical energy into alternating current energy;
and the converted alternating current energy is rectified, stepped down, filtered and stabilized to supply power for the power grid state monitoring device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211676967.2A CN115955014A (en) | 2022-12-26 | 2022-12-26 | High-voltage side electric field and mechanical energy composite energy obtaining device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211676967.2A CN115955014A (en) | 2022-12-26 | 2022-12-26 | High-voltage side electric field and mechanical energy composite energy obtaining device and method |
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| Publication Number | Publication Date |
|---|---|
| CN115955014A true CN115955014A (en) | 2023-04-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211676967.2A Pending CN115955014A (en) | 2022-12-26 | 2022-12-26 | High-voltage side electric field and mechanical energy composite energy obtaining device and method |
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| CN (1) | CN115955014A (en) |
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- 2022-12-26 CN CN202211676967.2A patent/CN115955014A/en active Pending
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