CN113746212A - High-efficiency induction power taking system for high-voltage line - Google Patents
High-efficiency induction power taking system for high-voltage line Download PDFInfo
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- CN113746212A CN113746212A CN202110872863.8A CN202110872863A CN113746212A CN 113746212 A CN113746212 A CN 113746212A CN 202110872863 A CN202110872863 A CN 202110872863A CN 113746212 A CN113746212 A CN 113746212A
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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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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
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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
- H02J50/005—Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
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Abstract
The invention discloses a high-efficiency induction power taking system for a high-voltage line, which relates to the technical field of induction power taking. Therefore, online power taking is realized, and transient interference of voltage and current is avoided.
Description
Technical Field
The invention belongs to the technical field of induction power taking, and particularly relates to a high-efficiency induction power taking system for a high-voltage line.
Background
The high-voltage induction electricity taking device is a novel induction electricity taking device which converts electromagnetic energy induced around a high-voltage power transmission line into electric energy and supplies a power supply with constant stability to nearby electrical equipment. The power supply device can ensure the stable power supply of the load returning equipment for a long time, and is suitable for being used as the power supply device of electrical equipment on a high-voltage transmission conductor for on-line detection, routing inspection, answering, theft prevention and the like. The high-voltage induction electricity-taking equipment is novel induction electricity-taking equipment which obtains electric energy by using electromagnetic energy induced around a high-voltage power transmission line. The equipment converts electromagnetic energy around the transmission conductor into electric energy to supply a stable power supply for electric equipment arranged nearby. The power supply device can ensure the long-time stable power supply of load equipment, and is suitable for being used as the power supply device of electrical equipment such as high-voltage transmission wires for online detection, monitoring, routing inspection, theft prevention and the like.
At present, the starting current of the CT is more than ten amperes, and the primary current changes along with the change of the electrical load, so that the power of the output side of the CT is obviously reduced, and therefore, a high-efficiency induction power taking system of a high-voltage line is needed.
Disclosure of Invention
The invention aims to provide a high-efficiency induction power taking system of a high-voltage line, so that the defect of low output power of the conventional CT is overcome.
In order to achieve the above object, the present invention provides a high-performance induction power-taking system for high-voltage lines, comprising:
the high-voltage transmission line penetrates through the real-time electricity taking CT module;
the overvoltage and overcurrent protection circuit is used for adjusting the output voltage of the secondary side of the real-time power acquisition CT module when the output voltage is greater than a preset voltage, so that the adjusted output voltage is less than or equal to the preset voltage;
the input end of the rectification filter circuit is connected with the output end of the overvoltage and overcurrent protection circuit, and the rectification filter circuit is used for rectifying and filtering input electric energy; and
and the power regulating circuit is respectively connected with the output ends of the overvoltage and overcurrent protection circuit and the rectification filter circuit, is used for detecting an output voltage value in real time, and dynamically regulates the magnetic flux of the coil through the bidirectional thyristor to play roles of stabilizing voltage and regulating power.
Further, the method also comprises the following steps:
the input end of the voltage stabilizing output circuit is connected with the output end of the power regulating circuit, and the voltage stabilizing output circuit is used for ensuring the stable output of the input voltage; and
and the input end of the rear-stage circuit is connected with the output end of the voltage-stabilizing output circuit.
Further, the iron core in the real-time electricity-taking CT module obtains the optimal iron core material through modeling.
Further, an equivalent circuit model derived from the improved J-A model is used as a resolving model of the real-time power-taking CT module, different magnetic core materials are respectively selected to construct the real-time power-taking CT module, and the optimal iron core material and the combination mode are obtained through analysis.
Furthermore, the real-time power-taking CT module is designed by selecting permalloy materials and a coupling mode.
Furthermore, the output power of the high-efficiency induction electricity taking system of the high-voltage line is improved and increased by optimizing the number of turns of a secondary side winding of the real-time electricity taking CT module and combining multi-path parallel output, and the lightning stroke/impact influence is reduced.
Furthermore, a voltage comparator is adopted in the overvoltage and overcurrent protection circuit.
Further, the voltage comparator is MAX931
Compared with the prior art, the invention has the following beneficial effects:
1. according to the high-efficiency induction power taking system for the high-voltage line, the magnetic field around the high-voltage power transmission line is converted into alternating current through the real-time power taking CT module, the alternating current is subjected to overvoltage and overcurrent protection through the overvoltage and overcurrent protection circuit, then direct current is rectified and filtered through the rectifying and filtering circuit and output to the wireless charging system, the direct current can supply power to the wireless charging system, in order to ensure that the output direct current meets requirements, the output voltage value is detected in real time through the power regulating circuit, and the bidirectional thyristor has the functions of stabilizing voltage and regulating power after dynamically regulating the magnetic flux of the coil, so that the safety of a power grid power transmission line is ensured. Therefore, online power taking is realized, and transient interference of voltage and current is avoided.
2. The high-efficiency induction power taking system for the high-voltage line further comprises a voltage stabilizing output circuit, and current output by the power regulating circuit is stably supplied to a post-stage circuit for use through the voltage stabilizing output circuit, so that the safety and the stability of a power grid transmission line are ensured.
3. In the high-efficiency induction power taking system for the high-voltage line, the equivalent circuit model derived from the improved J-A model is used as a resolving model of the real-time power taking CT module to perform modeling more accurately, different magnetic core materials are respectively selected to construct the real-time power taking CT module through the resolving model, and the optimal iron core material and the combination mode are obtained through analysis, so that the power taking of the high-voltage line is more efficient. Aiming at the problem of small output energy under the condition of low current, the real-time electricity taking CT module is designed by selecting permalloy materials and a coupling mode, so that the excitation magnetic resistance is reduced.
4. In the high-efficiency induction power taking system for the high-voltage line, the output power of the high-efficiency induction power taking system for the high-voltage line is increased by optimizing the number of turns of the secondary side winding of the real-time power taking CT module and combining multi-path parallel output, and the lightning stroke/impact influence is reduced, so that the output power is increased under the condition of low current.
5. In the high-efficiency induction power-taking system of the high-voltage line, the MAX931 integrated voltage comparator with the hysteresis loop is adopted, and the switching frequency of S is guaranteed to be reduced to the maximum extent under the condition of minimum output voltage fluctuation by adjusting the parameters of the peripheral circuit.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only one embodiment of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a high-performance induction power-taking system of a high-voltage line according to the present invention;
wherein: 1. a CT module for real-time power acquisition; 2. an overvoltage and overcurrent protection circuit; 3. a rectification filter circuit; 4. a power conditioning circuit; 5. a voltage stabilization output circuit; 6. a post-stage circuit; 7. high voltage transmission line.
Detailed Description
The technical solutions in the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The high-efficiency induction power taking system for the high-voltage line provided by the invention comprises: a real-time power-taking CT module 1, an overvoltage and overcurrent protection circuit 2, a rectification filter circuit 3 and a power regulation circuit 4,
the high-voltage transmission line 7 penetrates through the real-time electricity-taking CT module 1;
the input end of the overvoltage and overcurrent protection circuit 2 is connected with the real-time power-taking CT module 1, and the overvoltage and overcurrent protection circuit 2 is used for adjusting the output voltage of the secondary side of the real-time power-taking CT module 1 when the output voltage is greater than a preset voltage, so that the adjusted output voltage is less than or equal to the preset voltage;
the input end of the rectification filter circuit 3 is connected with the output end of the overvoltage and overcurrent protection circuit 2, and the rectification filter circuit 3 is used for rectifying and filtering input electric energy;
the power regulating circuit 4 is respectively connected with the output ends of the overvoltage and overcurrent protection circuit 2 and the rectification filter circuit 3, and the power regulating circuit 4 is used for detecting an output voltage value in real time and dynamically regulating the magnetic flux of the coil through the bidirectional thyristor, so that the functions of stabilizing voltage and regulating power are achieved.
Foretell high-effect induction of high-tension line gets electric system, get electric CT module 1 through real time and convert the magnetic field around high tension transmission line 7 into the alternating current, the alternating current carries out overvoltage overcurrent protection through overvoltage overcurrent protection circuit 2, then through rectifier and filter circuit 3 rectifier and filter output direct current, this direct current can supply power for wireless charging system, direct current in order to guarantee to export meets the requirements, through power regulating circuit 4 real-time detection output voltage value, bidirectional thyristor carries out the dynamic regulation back to the magnetic flux of coil, play steady voltage and power regulation's effect, thereby electric wire netting transmission line's security has been guaranteed. Therefore, online power taking is realized, and transient interference of voltage and current is avoided.
In one embodiment, the power-taking CT includes: the induction coil is wound on the outer side of the U-shaped iron core, and the induction coil acquires electric energy.
In one embodiment, the high-performance induction power taking system for the high-voltage line further comprises: a voltage stabilization output circuit 5 and a post-stage circuit 6,
the input end of the voltage-stabilizing output circuit 5 is connected with the output end of the power regulating circuit 4, and the voltage-stabilizing output circuit 5 is used for ensuring the stable output of the input voltage;
the input end of the post-stage circuit 6 is connected with the output end of the voltage-stabilizing output circuit 5.
The current output by the power regulating circuit 4 is stably supplied to the post-stage circuit 6 for use through the voltage stabilizing output circuit 5, so that the safety and the stability of the power grid transmission line are ensured.
In one embodiment, the iron core in the real-time electricity-taking CT module 1 obtains an optimal iron core material through modeling.
Specifically, an equivalent circuit model derived from the improved J-A model is used as a resolving model of the real-time power-taking CT module 1, different magnetic core materials are respectively selected to construct the real-time power-taking CT module 1, and the optimal iron core material and the combination mode are obtained through analysis.
Aiming at the problem of small output energy under the condition of low current, the real-time electricity taking CT module 1 is designed by selecting permalloy materials and a coupling mode, so that the excitation magnetic resistance is reduced.
The output power of the high-efficiency induction electricity taking system of the high-voltage line is increased by optimizing the number of turns of the secondary side winding of the real-time electricity taking CT module 1 and combining multi-path parallel output, the lightning stroke/impact influence is reduced, and therefore the output power under the low-current condition is improved.
In one embodiment, if the electric energy induced by the real-time power-taking CT module 1 exceeds the consumed electric energy, which is reflected by the increase of the voltage of the energy storage device or the post-stage circuit 6, the excess energy needs to be discharged to ensure the system safety. And the calculation of the over-energy release threshold value of the line is realized through the electricity taking logic design.
The key point of the design of the release control circuit is that the release control circuit must open a release switch S at necessary time to ensure that redundant energy can be released out; however, in order to protect the safety of the bleeder switch S and ensure that it operates at a lower switching frequency, a hysteresis loop must be added when making the voltage comparison. Therefore, in the circuit design, an integrated voltage comparator with a hysteresis loop, such as MAX931, is adopted, and the switching frequency of S is guaranteed to be reduced to the maximum extent under the condition of the lowest output voltage fluctuation by adjusting the parameters of peripheral circuits.
Specifically, the overvoltage/overcurrent protection circuit 2 may use a relatively high voltage ratio for connection.
In one embodiment, the power regulating circuit 4 employs a PWM power control circuit.
One of them embodiment, high-effect induction of high-voltage line is got electric system and is equipped with the shell, the shell adopts waterproof high temperature resistant to make, makes high-effect induction of high-voltage line get electric system can adapt to various outdoor bad weather through waterproof high temperature resistant shell.
In one embodiment, the power conditioning circuit 4 is powered by a battery, and the battery adopts a lithium battery pack and is used as a standby battery pack.
The working principle of the high-efficiency induction power taking system for the high-voltage line is explained in detail, so that the technical personnel in the field can understand the invention more:
FIG. 1 shows a high-efficiency induction power-taking system for high-voltage lines according to an embodiment of the present invention, which includes a real-time power-taking CT module 1, an over-voltage and over-current protection circuit 2, a rectification filter circuit 3, a power regulation circuit 4, a voltage-stabilizing output circuit 5 and a post-stage circuit 6 connected in sequence, when the high-efficiency induction power-taking system for high-voltage lines is used, a high-voltage power transmission line 7 passes through the power-taking CT module 1 to convert a magnetic field around the high-voltage power transmission line 7 into alternating current, the alternating current is subjected to over-voltage and over-current protection by the over-voltage and over-current protection circuit 2, and then rectified and filtered by the rectification filter circuit 3 to output direct current, which can supply power to a wireless charging system, in order to ensure that the output direct current meets requirements, the output voltage value is detected in real time by the power regulation circuit 4, and after the bidirectional thyristors dynamically adjust the magnetic flux of coils, the voltage stabilizing and power adjusting functions are achieved, and therefore the safety of the power grid transmission line is guaranteed. The current output by the power regulating circuit 4 is stably supplied to the post-stage circuit 6 for use through the voltage stabilizing output circuit 5, so that the safety and the stability of the power grid transmission line are ensured.
The above disclosure is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of changes or modifications within the technical scope of the present invention, and shall be covered by the scope of the present invention.
Claims (8)
1. The utility model provides a high-effect induction of high tension line gets electric system which characterized in that includes:
the high-voltage transmission line penetrates through the real-time electricity taking CT module;
the overvoltage and overcurrent protection circuit is used for adjusting the output voltage of the secondary side of the real-time power acquisition CT module when the output voltage is greater than a preset voltage, so that the adjusted output voltage is less than or equal to the preset voltage;
the input end of the rectification filter circuit is connected with the output end of the overvoltage and overcurrent protection circuit, and the rectification filter circuit is used for rectifying and filtering input electric energy; and
and the power regulating circuit is respectively connected with the output ends of the overvoltage and overcurrent protection circuit and the rectification filter circuit, is used for detecting an output voltage value in real time, and dynamically regulates the magnetic flux of the coil through the bidirectional thyristor to play roles of stabilizing voltage and regulating power.
2. The high-efficiency induction power taking system for the high-voltage line as claimed in claim 1, further comprising:
the input end of the voltage stabilizing output circuit is connected with the output end of the power regulating circuit, and the voltage stabilizing output circuit is used for ensuring the stable output of the input voltage; and
and the input end of the rear-stage circuit is connected with the output end of the voltage-stabilizing output circuit.
3. The high-efficiency induction power taking system for the high-voltage line according to claim 1, wherein an iron core in the real-time power taking CT module obtains an optimal iron core material through modeling.
4. The high-efficiency induction power taking system for the high-voltage line according to claim 2, wherein an equivalent circuit model derived from the improved J-A model is used as a resolving model of the real-time power taking CT module, different magnetic core materials are respectively selected to construct the real-time power taking CT module, and the optimal iron core material and the combination mode are obtained through analysis.
5. The high-efficiency induction power-taking system for the high-voltage line as claimed in claim 1, wherein the real-time power-taking CT module is designed by selecting permalloy materials and coupling mode.
6. The high-voltage line high-efficiency induction power taking system according to claim 1, wherein the output power of the high-voltage line high-efficiency induction power taking system is increased by optimizing the number of turns of a secondary side winding of the real-time power taking CT module and combining multi-path parallel output promotion, and the lightning/impact influence is reduced.
7. The high-efficiency induction power taking system for the high-voltage line as claimed in claim 1, wherein a voltage comparator is adopted in the over-voltage and over-current protection circuit.
8. The high performance induction power taking system for the high voltage line as claimed in claim 7, wherein the voltage comparator is MAX 931.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110872863.8A CN113746212A (en) | 2021-07-30 | 2021-07-30 | High-efficiency induction power taking system for high-voltage line |
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| CN202110872863.8A CN113746212A (en) | 2021-07-30 | 2021-07-30 | High-efficiency induction power taking system for high-voltage line |
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Citations (7)
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| CN201185355Y (en) * | 2008-04-24 | 2009-01-21 | 武汉大学 | High voltage line induction electricity-taking apparatus |
| CN204046283U (en) * | 2014-08-07 | 2014-12-24 | 国家电网公司 | 10kV distribution network line electromagnetic induction power taking multiple-channel output device |
| CN106160024A (en) * | 2016-07-19 | 2016-11-23 | 武汉大学 | A kind of high-voltage power transmission device towards wireless energy transfer system |
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| CN208316414U (en) * | 2018-05-10 | 2019-01-01 | 珠海市金锐电力科技有限公司 | High voltage induction electricity getting device |
| CN110460163A (en) * | 2019-07-30 | 2019-11-15 | 武汉理工大学 | A kind of new coil induction-type high-voltage power transmission line magnetic field energy collection system |
| CN211351693U (en) * | 2019-12-27 | 2020-08-25 | 深圳市越疆科技有限公司 | Motor feed control circuit and electric equipment |
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2021
- 2021-07-30 CN CN202110872863.8A patent/CN113746212A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201185355Y (en) * | 2008-04-24 | 2009-01-21 | 武汉大学 | High voltage line induction electricity-taking apparatus |
| CN204046283U (en) * | 2014-08-07 | 2014-12-24 | 国家电网公司 | 10kV distribution network line electromagnetic induction power taking multiple-channel output device |
| CN106160024A (en) * | 2016-07-19 | 2016-11-23 | 武汉大学 | A kind of high-voltage power transmission device towards wireless energy transfer system |
| CN207896717U (en) * | 2018-02-05 | 2018-09-21 | 郑州泰恩科技有限公司 | A kind of CT electricity getting devices for energy monitoring apparatus |
| CN208316414U (en) * | 2018-05-10 | 2019-01-01 | 珠海市金锐电力科技有限公司 | High voltage induction electricity getting device |
| CN110460163A (en) * | 2019-07-30 | 2019-11-15 | 武汉理工大学 | A kind of new coil induction-type high-voltage power transmission line magnetic field energy collection system |
| CN211351693U (en) * | 2019-12-27 | 2020-08-25 | 深圳市越疆科技有限公司 | Motor feed control circuit and electric equipment |
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