CN113472090A - Energy and signal are with passing mechanism and high-tension line monitoring facilities's wireless power supply system - Google Patents
Energy and signal are with passing mechanism and high-tension line monitoring facilities's wireless power supply system Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/36—Electric or magnetic shields or screens
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/14—Inductive couplings
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/50—Circuit arrangements or systems for wireless supply or distribution of electric power using additional energy repeaters between transmitting devices and receiving devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/70—Circuit arrangements or systems for wireless supply or distribution of electric power involving the reduction of electric, magnetic or electromagnetic leakage fields
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/155—Ground-based stations
- H04B7/15528—Control of operation parameters of a relay station to exploit the physical medium
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Abstract
The invention provides a wireless power supply system of an energy and signal simultaneous transmission mechanism and high-voltage line monitoring equipment, which comprises: the system comprises a first transmission unit, a second transmission unit and a plurality of relay units which are sequentially arranged between the first transmission unit and the second transmission unit; the first transmission unit comprises an energy transmitting coil and a first signal transmission coil which are adjacently arranged; the second transmission unit comprises an energy receiving coil and a second signal transmission coil which are adjacently arranged; the relay unit comprises a relay coil, and the relay coil comprises an energy relay coil and a signal relay coil; the first transmission unit, the second transmission unit and the relay unit also comprise magnetic shielding components; the magnetic shielding component is used for inhibiting cross coupling between non-adjacent coils so that energy or signals can be transmitted between the adjacent coils. The invention solves the problem of cross interference between coils in a multi-relay mode, improves the frequency stability and signal transmission quality of energy transmission, and realizes the function of multi-stage simultaneous transmission of energy signals in the multi-relay mode.
Description
Technical Field
The invention belongs to the technical field of wireless power transmission, and particularly relates to a wireless power supply system of an energy and signal simultaneous transmission mechanism and high-voltage line monitoring equipment.
Background
The power supply mode of the high-voltage line on-line monitoring equipment mainly adopts a storage battery, a solar cell panel or wind power generation and the like. The storage battery is replaced regularly, a large amount of manpower and material resources are consumed, and the potential safety hazard is large; wind and light power generation is limited by natural environmental conditions, and application limitation is large. In recent years, a Power supply solution for a novel online monitoring device of a high-voltage transmission line, which combines a Wireless Power Transfer (WPT) technology with a Current Transformer (CT), has attracted much attention, and is considered to be an effective solution for solving the problem of a Power supply source of a device on a line column. According to the scheme, energy is obtained by induction of the electricity-taking CT on the high-voltage line, and then the energy is transmitted to the on-line monitoring equipment on the low-voltage side in a wireless energy transmission mode, so that the power supply of the on-line monitoring equipment on the high-voltage line is realized.
However, in the prior art, wireless power supply can only be realized for the high-voltage line online monitoring equipment, and the function of simultaneously transmitting energy and signals in a multi-relay mode is not realized.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides an energy and signal simultaneous transmission mechanism and a wireless power supply system of high-voltage line monitoring equipment, so as to solve the problem that the energy and signal simultaneous transmission function in a multi-relay mode is not realized in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides an energy and signal simultaneous transmission mechanism, which comprises a first transmission unit, a second transmission unit and a plurality of relay units, wherein the plurality of relay units are sequentially arranged between the first transmission unit and the second transmission unit;
the first transmission unit comprises a first coil assembly, and the first coil assembly comprises an energy transmitting coil and a first signal transmission coil which are adjacently arranged;
the second transmission unit comprises a second coil assembly, and the second coil assembly comprises an energy receiving coil and a second signal transmission coil which are adjacently arranged;
the relay unit comprises a relay coil, and the relay coil comprises an energy relay coil and a signal relay coil;
the first transmission unit, the second transmission unit and the relay unit all comprise magnetic shielding components; the magnetic shielding component is used for inhibiting cross coupling between non-adjacent coils so that energy or signals can be transmitted between the adjacent coils.
By the mode, the problem of cross coupling among the multiple relay coils is fundamentally solved, namely the problem that cross interference among the coils influences energy and signal transmission quality in a multiple relay mode is solved, the frequency stability of energy transmission and the quality of signal transmission are improved, and the multi-stage simultaneous transmission function of the energy and the signal in the multiple relay mode is realized.
In order to optimize the technical scheme, the specific measures adopted further comprise:
furthermore, the energy relay coil and the signal relay coil are double-layer relay sub-coils formed by winding a conducting wire, and the magnetic shielding component of the relay unit is positioned between the double-layer relay sub-coils. In the implementation process, the energy relay coil and the signal relay coil are respectively double-layer relay sub-coils formed by winding a conducting wire, the reasonable coil structure realizes the integrated design, and the volume of the whole mechanism is reduced.
Further, the first transmission unit, the second transmission unit, and the relay unit each include a magnetic core; the magnetic core of the first transmission unit is arranged between the first coil assembly and the magnetic shielding component of the first transmission unit; a magnetic core of the second transmission unit is disposed between the second coil assembly and a magnetic shield member of the second transmission unit; the relay unit is provided with two magnetic cores which are respectively arranged on two sides of the magnetic shielding component of the relay unit and are adjacent to the magnetic shielding component. Through the mode, the magnetic cores are arranged in the first transmission unit, the second transmission unit and the relay unit, so that the coupling strength among the coils is enhanced.
Furthermore, the energy transmitting coil, the energy relay coil and the energy receiving coil are all circular coils; the first signal transmission coil, the signal relay coil and the second signal transmission coil are double D-shaped coils.
Furthermore, the energy transmitting coil, the energy relay coil and the energy receiving coil are double D-shaped coils; the first signal transmission coil, the signal relay coil and the second signal transmission coil are all circular coils.
In the implementation process, the round coil is used for transmitting energy and the double D-shaped coils are used for transmitting signals, or the double D-shaped coils are used for transmitting energy and the round coils are used for transmitting signals, so that the problem of crosstalk of energy and signal transmission channels is solved.
Furthermore, the double D-shaped coils comprise two D-shaped coils which are symmetrically arranged by taking the straight line side as a symmetry axis, and the winding directions of the two D-shaped coils are opposite. Through the mode, the magnetism of the double D-shaped coil is improved.
Further, the energy transmitting coil, the first signal transmitting coil, the energy receiving coil, the second signal transmitting coil, the energy relay coil, the signal relay coil, and the magnetic shielding member are coaxially disposed. By the mode, the positions of the energy transmitting coil, the first signal transmission coil, the energy receiving coil, the second signal transmission coil, the energy relay coil, the signal relay coil and the magnetic shielding component are convenient to fix.
Further, the first transmission unit further comprises a first transmission controller, and the second transmission unit further comprises a second transmission controller; the second transmission controller transmits an output voltage signal to the first transmission controller after transmitting the output voltage signal through the second signal transmission coil, the signal relay coil and the first signal transmission coil in sequence; and after comparing the value of the output voltage with a preset reference value, the first transmission controller controls and adjusts the input voltage according to the comparison result so as to realize the constant voltage control of the load end. Through the mode, the transmission of the output voltage signal can be realized while the energy transmission is realized, and the feedback control of the system is further realized.
Further, the first transmission unit further comprises a proportional-integral controller, a phase-shift modulator and a full-bridge inverter which are electrically connected with the first transmission controller; the full-bridge inverter is used for inverting a direct-current power supply into alternating current, phase-shifting control is carried out on the full-bridge inverter through the proportional-integral controller and the phase-shifting modulator, and the phase-shifting angle of the full-bridge inverter is adjusted according to the comparison result of the real-time output voltage value and the preset reference value, so that the input voltage is changed. The proportional-integral controller and the phase-shifting modulator are used for carrying out phase-shifting control on the full-bridge inverter, so that the control is more accurate.
The invention also provides a wireless power supply system of the high-voltage line monitoring equipment, which comprises a high-voltage power taking device and the energy and signal simultaneous transmission mechanism;
the high-voltage power taking device is used for inducing and taking energy from a high-voltage line, converting the energy into constant-voltage direct-current electric energy and inverting the high frequency of the direct-current electric energy into alternating-current electric energy;
the energy and signal simultaneous transmission mechanism is used for wirelessly transmitting alternating current electric energy, converting high-frequency alternating current electric energy received after transmission into direct current electric energy, supplying power to the on-line monitoring equipment on the low-voltage side through the direct current electric energy, and transmitting signals. By the mode, the multi-stage simultaneous transmission function of energy and signals in the multi-relay mode of the high-voltage line is realized.
The invention has the beneficial effects that: by adopting the energy and signal simultaneous transmission mechanism, the problem of cross interference among coils in a multi-relay mode can be solved, the frequency stability and the signal transmission quality of energy transmission are improved, and the multi-stage simultaneous transmission function of energy signals in the multi-relay mode is realized.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
FIG. 1 is a schematic diagram of the structure of an energy transmission coil and a signal transmission coil in an embodiment of the invention;
FIG. 2 is a schematic structural diagram of a multi-stage coil according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a circuit in an embodiment of the invention;
fig. 4 is a schematic diagram of a wireless power supply system of the high-voltage line monitoring device according to the embodiment of the invention.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "upper", "lower", "left", "right", "front", "back", etc. used in the present invention are for clarity of description only, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not limited by the technical contents of the essential changes.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
The first embodiment is as follows:
the embodiment provides an energy and signal synchronous transmission coupling mechanism (that is, an energy and signal synchronous transmission mechanism) based on a multi-relay mode, so as to realize an energy and signal multi-stage synchronous transmission function in the multi-relay mode, wherein the multi-relay mode is adopted, so that a transmission distance of energy and signals is increased, and a structure of the energy and signal synchronous transmission mechanism will be described below.
The embodiment provides an energy and signal simultaneous transmission mechanism, including:
the system comprises a first transmission unit, a second transmission unit and a plurality of relay units which are sequentially arranged between the first transmission unit and the second transmission unit; the number of the adopted relay units is more than or equal to 2, in practical application, the relay units can be set according to the distance and the actual requirement, and the number of the relay units can be set to be 2, 3, 4 and the like.
The first transmission unit comprises a first coil assembly, and the first coil assembly comprises an energy transmitting coil and a first signal transmission coil which are adjacently arranged; in the actual setting process, the left-right position relation of the energy transmitting coil and the first signal transmission coil can be any;
the second transmission unit comprises a second coil assembly, and the second coil assembly comprises an energy receiving coil and a second signal transmission coil which are adjacently arranged; in the actual setting process, the left-right position relation of the energy receiving coil and the second signal transmission coil can be any;
the relay unit comprises a relay coil, and the relay coil comprises an energy relay coil and a signal relay coil; the number and size of the relay coils can be changed according to requirements;
the energy transmission coil comprises an energy transmitting coil and an energy receiving coil.
The energy transmitting coil is used for transmitting electric energy to the energy receiving coil in a one-way mode through the energy relay coil, and a wireless charging function is achieved; the first signal transmission coil and the second signal transmission coil realize the function of bidirectional signal transmission between the first signal transmission coil and the second signal transmission coil through the signal relay coil, namely, a signal can be transmitted from the first signal transmission coil to the second signal transmission coil through the signal relay coil, and the signal can also be transmitted from the second signal transmission coil to the first signal transmission coil through the signal relay coil; in the scheme of the embodiment, the energy transmission channel and the signal transmission channel are independent from each other, so that the problem of crosstalk between the energy transmission channel and the signal transmission channel is solved.
Due to cross coupling between non-adjacent coils, a frequency drift phenomenon can occur on energy transmission, so that a maximum efficiency point shifts a resonance frequency; meanwhile, the cross interference of the multi-stage signal transmission coil also affects the quality of signal transmission; in addition, the power multipath transmission phenomenon caused by cross coupling also causes the analysis of the wireless power transmission system with multiple relay coils to be complicated; therefore, it is important to solve the problem of cross-coupling between the multiple relay coils. In the present embodiment, the first transmission unit, the second transmission unit, and the relay unit each further include a magnetic shield member; the magnetic shielding component is used for inhibiting the cross coupling between non-adjacent coils, so that energy or signals are transmitted between the adjacent coils, the inhibition of the cross coupling of the coils is realized, the cross coupling problem between multiple relay coils is fundamentally solved, the frequency drift phenomenon cannot occur during energy transmission, the maximum efficiency point cannot deviate the resonance frequency, meanwhile, the cross interference of the multi-stage signal transmission coil is also solved, and the quality of signal transmission is improved.
The magnetic field intensity between adjacent coils is stronger, and the magnetic field intensity between non-adjacent coils and outside the coupling mechanism is weaker, and the magnetic shielding component has played fine shielding effect.
Through the mode, under the multi-relay mode, the problem that cross interference among the coils influences energy and signal transmission quality under the multi-relay mode is solved through independent arrangement of the coils for transmitting energy and the coils for transmitting signals and structural arrangement of the introduced magnetic shielding components, frequency stability of energy transmission and signal transmission quality are improved, and the multi-stage simultaneous transmission function of the energy and the signals under the multi-relay mode is realized.
Alternatively, in the present embodiment, the energy relay coil and the signal relay coil are each a double-layer relay coil wound by one wire, and the magnetic shielding member of the relay unit is located between the double-layer relay coils. In the implementation process, the energy relay coil and the signal relay coil are respectively double-layer relay sub-coils formed by winding a conducting wire, the reasonable coil structure realizes the integrated design, the size of the relay coil is reduced, and further the size of the whole mechanism is reduced.
Optionally, in this embodiment, the energy transmitting coil, the energy relay coil, and the energy receiving coil all use circular coils, and the first signal transmission coil, the signal relay coil, and the second signal transmission coil all use double D-shaped coils; or the energy transmitting coil, the energy relay coil and the energy receiving coil are double D-shaped coils, and the first signal transmission coil, the signal relay coil and the second signal transmission coil are circular coils. In the implementation process, the round coil is used for transmitting energy and the double D-shaped coils are used for transmitting signals, or the double D-shaped coils are used for transmitting energy and the round coils are used for transmitting signals, the energy transmission channels and the signal transmission channels are independent from each other, and the problem of crosstalk of the energy and signal transmission channels is solved.
Optionally, in this embodiment, the double D-shaped coil includes two symmetrical D-shaped coils, and the winding directions of the two D-shaped coils are opposite. Through the mode, the magnetism of the double D-shaped coil is improved.
Referring to fig. 1, a first transmission unit (i.e., a transmitting coil TX), a second transmission unit (i.e., a receiving coil RX), and two relay units (i.e., relay coils RX) are shown in fig. 11Relay coil RX2) Schematic diagram of the coil structure of (1). Fig. 1 shows an example in which a unipolar coil (circular coil) is used as the energy transmission coil and a bipolar coil (double D-type coil) is used as the signal transmission coil, and mutual interference between the transmission processes is achieved by utilizing the decoupling characteristics of the two coils. At the relay coil RX1、RX2The energy relay coil and the signal relay coil are both double-layer relay coils formed by winding a conducting wire, the double-layer relay coils are formed by winding a wire, the arrow directions in the drawing indicate the winding directions of the coils, the double-layer relay coils are respectively attached to the outer surfaces of the magnetic cores on two sides of the magnetic shielding component (the internal and external position relation of the energy double-layer relay coils and the signal double-layer relay coils can be arbitrary, namely the energy double-layer relay coils can be arranged outside or inside the signal double-layer relay coils), so that the energy or signals can be transmitted only between the adjacent coils, and cross interference can not be generated. The magnetic shield member includes an aluminum plate or a copper plate. The aluminum plate or the copper plate is used as a magnetic shielding component, so that the magnetic shielding effect is good.
Optionally, the energy transmitting coil, the first signal transmitting coil, the energy receiving coil, the second signal transmitting coil, the energy relay coil, the signal relay coil and the magnetic shielding component are coaxially arranged. In concrete implementation, through holes with certain sizes can be reserved inside the coil and the magnetic shielding component, and the coil can be conveniently and coaxially placed and conveniently fixed inside the insulator. In order to achieve a better transmission performance, the individual coils are parallel or nearly parallel to each other.
In order to meet a certain insulation grade, the wireless power transmission distance should be greater than the insulation distance, and meanwhile, due to the limitation of the application environment, the size of the coupling mechanism (i.e., the energy and signal simultaneous transmission mechanism in the embodiment) is also very limited, so that in order to ensure that the efficiency of the coupling mechanism is higher while the transmission distance is increased, the coupling mechanism based on multiple relay coils is adopted in the embodiment, and the coupling mechanism is wound inside the insulator, so that the requirement of the insulation grade is met, and meanwhile, the installation of the coupling mechanism is facilitated.
Optionally, in this embodiment, referring to fig. 2, fig. 2 shows a first transmission unit (i.e. a transmitting coil TX), a second transmission unit (i.e. a receiving coil RX), and two relay units (i.e. relay coils RX)1Relay coil RX2) Schematic structural diagram of (1). The first transmission unit, the second transmission unit and the relay unit all comprise magnetic cores, the magnetic cores of the first transmission unit are arranged between the magnetic shielding components of the first coil assembly and the first transmission unit, the magnetic cores of the second transmission unit are arranged between the magnetic shielding components of the second coil assembly and the second transmission unit, and the two magnetic cores of the relay unit are respectively arranged on two sides of the magnetic shielding components of the relay unit and are adjacent to the two magnetic shielding components. Alternatively, in the present embodiment, the magnetic shield member includes an aluminum plate or a copper plate, and the magnetic shield effect is good by the aluminum plate or the copper plate as the magnetic shield member. In fig. 2, a layer of magnetic core + aluminum plate structure is arranged outside the transmitting coil and the receiving coil, the magnetic core is used for enhancing the coupling strength between the coils, and the aluminum plate is used for shielding the magnetic field between the multi-stage coupling coils to prevent the magnetic field from leaking to the periphery; the two-stage relay coil is internally provided with a layer of magnetic core + aluminum plate + magnetic core structure, the magnetic core is also used for enhancing the coupling strength between the coils, and the aluminum plate is used for inhibiting the cross coupling between non-adjacent coils so that energy or signals can be transmitted only between the adjacent coils.
Referring to fig. 3, fig. 3 is a schematic diagram of a system circuit, which is divided into an energy transmission portion and a signal transmission portion, and the energy transmission portion and the signal transmission portion will be described below with reference to fig. 3.
The energy transfer section will be explained below.
Using a multi-stage series resonance compensation topology for the energy transfer section, L1、L2、L3、L4Self-inductance, C, of respective four-stage energy-transfer coils1、C2、C3、C4Is in conjunction with itCapacitance of series resonance, M1、M2、M3Respectively representing mutual inductance of adjacent energy transmission coils, DC power supply UdcThrough a full bridge inverter (i.e., Q)1、Q2、Q3、Q4) The energy is transmitted from the transmitting end to the load end through the two-stage relay coils.
The signal transmission section will be explained below.
The first transmission unit further comprises a first transmission controller, the second transmission unit further comprises a second transmission controller, and the second transmission controller loads the load RLOutput voltage signal ULAnd the first transmission controller compares the value of the output voltage with a preset reference value and controls and adjusts the input voltage according to the comparison result so as to realize the constant voltage control of the load end. Through the mode, the transmission of the output voltage signal can be realized while the energy transmission is realized, and the feedback control of the system is further realized.
Optionally, in this embodiment, the first transmission unit further includes a proportional-integral controller (i.e., a PI controller) electrically connected to the first transmission controller, a phase-shifted modulator (PSM), and a full-bridge inverter, the full-bridge inverter is configured to invert a dc power into an ac power, perform phase shift control on the full-bridge inverter through the proportional-integral controller and the phase-shifted modulator, and adjust the full-bridge inverter (i.e., a Q inverter) according to a comparison result between a value of the real-time output voltage and a preset reference value1、Q2、Q3、Q4) And shifting the phase angle, thereby changing the magnitude of the input voltage. The full-bridge inverter is subjected to phase-shifting control through the proportional-integral controller and the phase-shifting modulator, so that the control is more accurate.
Output voltage signal ULAfter passing through the voltage divider, the second signal transmission coil is loaded after ADC modulation processing, and the second signal transmission coil sequentially passes through two signal trunk linesThe voltage signal is transmitted to a first signal transmission coil, and a real-time output voltage signal U is obtained after signal demodulation processingLThe first transmission controller outputs a voltage signal ULAnd a reference voltage ULrefObtaining a deviation value after comparison, and controlling the proportional-integral controller and the phase-shift modulator to the full-bridge inverter (namely Q)1、Q2、Q3、Q4) And performing phase shift control, and adjusting the phase shift angle of the full-bridge inverter according to the real-time output voltage, so as to change the input voltage and realize constant voltage control at a load end.
Therefore, the system realizes synchronous transmission of energy and signals, and can feed back the energy and the signals to the primary side controller according to the magnitude of the output quantity to perform closed-loop control.
Through the technical scheme of this embodiment, energy and signal multistage simultaneous transmission function under the mode of relaying has been realized, has restrained the cross coupling between the non-adjacent coil through the magnetic screen part simultaneously, makes energy or signal only transmit between adjacent coil, has promoted the frequency stability of energy transmission and the quality of signal transmission.
The energy and signal simultaneous transmission mechanism of the embodiment can be applied to a wireless power supply system of high-voltage line online monitoring equipment and is also applicable to other wireless power transmission systems based on a multi-stage relay mode.
Example two:
the embodiment provides a wireless power supply system of high-voltage line monitoring equipment, which comprises a high-voltage power taking device and the energy and signal simultaneous transmission mechanism of the first embodiment;
the high-voltage electricity taking device is used for inducing and taking energy from a high-voltage line, converting the energy into constant-voltage direct current electric energy and inverting the high frequency of the direct current electric energy into alternating current electric energy;
the energy and signal simultaneous transmission mechanism is used for wirelessly transmitting alternating current electric energy, converting the high-frequency alternating current electric energy received after transmission into direct current electric energy, supplying power to on-line monitoring equipment on a low-voltage side through the direct current electric energy, and transmitting signals.
The wireless power supply system of the high-voltage line online monitoring device is taken as an example for explanation. Because the high-voltage direct current is obtained after the energy is obtained by utilizing the induction of the current transformer on the high-voltage line and the power cannot be directly supplied to the on-pole monitoring equipment and the like on the low-voltage side, the electric isolation of the power supply and utilization equipment and the insulation on the high-voltage side are realized by adopting a wireless power transmission mode. Meanwhile, the system adds a multi-stage relay coil to improve the transmission distance and transmission efficiency in consideration that the wireless power transmission distance must be larger than the insulation distance. In order to solve the problem of synchronous transmission of system energy signals and avoid inconvenience caused by cross coupling in multiple relay coils, the coupling mechanism of the first embodiment (i.e., the energy and signal simultaneous transmission mechanism of the first embodiment) can be conveniently applied to a system.
As shown in fig. 4, the wireless power supply system of the high-voltage line monitoring device includes a high-voltage power-taking device, a coupling mechanism (including a transmitting coil, a relay coil 1, a relay coil 2, and a receiving coil, wherein the transmitting coil, the relay coil 1, the relay coil 2, and the receiving coil are all sleeved on an insulator), and a receiving device. The high-voltage power taking device comprises a power taking CT and a wireless power transmitting device, wherein the power taking CT induces and takes power from a high-voltage line and converts the power into constant-voltage direct-current power, and the wireless power transmitting device (comprising a transmitting circuit) inverts the high frequency of the direct-current power into alternating-current power to supply to a transmitting coil; the coupling mechanism comprises four stages of coupling coils and magnetic shielding components, each stage of coupling coil is divided into an energy transmission coil and a signal transmission coil, the energy transmission coils are matched into a resonance state with the same frequency, energy is transmitted by the transmitting coil and is transmitted to the receiving coil through the two relay coils, and the signal transmission coil is also transmitted to the signal receiving end through the signal transmitting end and the relay coil; the receiving device converts the high-frequency alternating current in the receiving coil into direct current, and charges the battery of the on-line monitoring equipment through the battery charging circuit.
Here, the four-stage coupling coils are all wound inside the insulator, and the coil structure adopts a multi-stage energy and signal synchronous transmission mechanism as shown in fig. 1 and fig. 2, so that cross coupling of non-adjacent coils can be effectively inhibited, and synchronous transmission of energy and signals in a multi-relay mode is realized.
Those of ordinary skill in the art will appreciate that the elements of the examples described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the components of the examples have been described above generally in terms of their functionality in order to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiments provided in the present application, it should be understood that the division of the unit is only one division of logical functions, and other division manners may be used in actual implementation, for example, multiple units may be combined into one unit, one unit may be split into multiple units, or some features may be omitted.
By adopting the energy and signal simultaneous transmission mechanism, the problem of cross interference among coils in a multi-relay mode can be solved, the frequency stability and the signal transmission quality of energy transmission are improved, and the multi-stage simultaneous transmission function of energy signals in the multi-relay mode is realized.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may be made by those skilled in the art without departing from the principle of the invention.
Claims (10)
1. An energy and signal simultaneous transmission mechanism is characterized by comprising a first transmission unit, a second transmission unit and a plurality of relay units sequentially arranged between the first transmission unit and the second transmission unit;
the first transmission unit comprises a first coil assembly, and the first coil assembly comprises an energy transmitting coil and a first signal transmission coil which are adjacently arranged;
the second transmission unit comprises a second coil assembly, and the second coil assembly comprises an energy receiving coil and a second signal transmission coil which are adjacently arranged;
the relay unit comprises a relay coil, and the relay coil comprises an energy relay coil and a signal relay coil;
the first transmission unit, the second transmission unit and the relay unit all comprise magnetic shielding components; the magnetic shielding component is used for inhibiting cross coupling between non-adjacent coils so that energy or signals can be transmitted between the adjacent coils.
2. The mechanism of claim 1, wherein the energy relay coil and the signal relay coil are double-layer relay sub-coils wound by a single wire, and the magnetic shielding member of the relay unit is located between the double-layer relay sub-coils.
3. The energy and signal co-transmission mechanism according to claim 2, wherein the first transmission unit, the second transmission unit, and the relay unit each include a magnetic core; the magnetic core of the first transmission unit is arranged between the first coil assembly and the magnetic shielding component of the first transmission unit; a magnetic core of the second transmission unit is disposed between the second coil assembly and a magnetic shield member of the second transmission unit; the relay unit is provided with two magnetic cores which are respectively arranged on two sides of the magnetic shielding component of the relay unit and are adjacent to the magnetic shielding component.
4. The mechanism according to any one of claims 1 to 3, wherein the energy transmitting coil, the energy relay coil and the energy receiving coil are circular coils; the first signal transmission coil, the signal relay coil and the second signal transmission coil are double D-shaped coils.
5. The mechanism according to any one of claims 1 to 3, wherein the energy transmitting coil, the energy relay coil and the energy receiving coil are double D-shaped coils; the first signal transmission coil, the signal relay coil and the second signal transmission coil are all circular coils.
6. The mechanism of claim 4 or 5, wherein the double D-shaped coil comprises two symmetrically arranged D-shaped coils with a straight edge as a symmetry axis, and the winding directions of the two D-shaped coils are opposite.
7. The energy and signal co-transmission mechanism according to any one of claims 1 to 3, wherein the energy transmitting coil, the first signal transmitting coil, the energy receiving coil, the second signal transmitting coil, the energy repeating coil, the signal repeating coil and the magnetic shielding component are coaxially disposed.
8. The energy and signal co-transmission mechanism according to any one of claims 1 to 3, wherein the first transmission unit further comprises a first transmission controller, and the second transmission unit further comprises a second transmission controller; the second transmission controller transmits an output voltage signal to the first transmission controller after transmitting the output voltage signal through the second signal transmission coil, the signal relay coil and the first signal transmission coil in sequence; and after comparing the value of the output voltage with a preset reference value, the first transmission controller controls and adjusts the input voltage according to the comparison result so as to realize the constant voltage control of the load end.
9. The energy and signal co-transmission mechanism according to claim 8, wherein the first transmission unit further comprises a proportional-integral controller, a phase-shift modulator, a full-bridge inverter electrically connected to the first transmission controller; the full-bridge inverter is used for inverting a direct-current power supply into alternating current, phase-shifting control is carried out on the full-bridge inverter through the proportional-integral controller and the phase-shifting modulator, and the phase-shifting angle of the full-bridge inverter is adjusted according to the comparison result of the real-time output voltage value and the preset reference value, so that the input voltage is changed.
10. A wireless power supply system of a high-voltage line monitoring device, which is characterized by comprising a high-voltage power taking device and the energy and signal simultaneous transmission mechanism as claimed in any one of claims 1 to 9;
the high-voltage power taking device is used for inducing and taking energy from a high-voltage line, converting the energy into constant-voltage direct-current electric energy and inverting the high frequency of the direct-current electric energy into alternating-current electric energy;
the energy and signal simultaneous transmission mechanism is used for wirelessly transmitting alternating current electric energy, converting high-frequency alternating current electric energy received after transmission into direct current electric energy, supplying power to the on-line monitoring equipment on the low-voltage side through the direct current electric energy, and transmitting signals.
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