CN114865802A - Induction electricity taking device of non-closed magnetic core - Google Patents

Induction electricity taking device of non-closed magnetic core Download PDF

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Publication number
CN114865802A
CN114865802A CN202210601544.8A CN202210601544A CN114865802A CN 114865802 A CN114865802 A CN 114865802A CN 202210601544 A CN202210601544 A CN 202210601544A CN 114865802 A CN114865802 A CN 114865802A
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China
Prior art keywords
magnetic core
magnetic
cores
closed
core coil
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CN202210601544.8A
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Chinese (zh)
Inventor
李伟
杨洋
甘峰源
周易
杨雪雷
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Shanghai Institute of Microsystem and Information Technology of CAS
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Shanghai Institute of Microsystem and Information Technology of CAS
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Priority to CN202210601544.8A priority Critical patent/CN114865802A/en
Publication of CN114865802A publication Critical patent/CN114865802A/en
Pending legal-status Critical Current

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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
    • 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
    • H01F27/24—Magnetic cores
    • 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
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
    • H01F27/306—Fastening or mounting coils or windings on core, casing or other support
    • 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
    • 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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Coils Of Transformers For General Uses (AREA)

Abstract

The invention provides an induction power taking device of a non-closed magnetic core, which comprises a non-closed drawable magnetic core coil assembly and an electric energy management module connected with the non-closed drawable magnetic core coil assembly, wherein the drawable magnetic core coil assembly comprises a plurality of thin column type magnetic cores and a magnetic core coil sleeved on the outer sides of all the thin column type magnetic cores, and at least one part of each thin column type magnetic core can be drawn relative to the magnetic core coil. The non-closed magnetic core is adopted in the induction electricity taking device of the non-closed magnetic core, the problem that the induction electricity taking device is compatible with different voltage grades and cable diameter adaptation is solved, meanwhile, the traditional whole magnetic core is equivalently replaced by a plurality of thin magnetic cores with higher effective magnetic conductivity, the magnetic cores can be pulled to change the length of a magnetic circuit in the magnetic core, and the output power and the power density of the whole magnetic core can be improved.

Description

Induction electricity taking device of non-closed magnetic core
Technical Field
The invention belongs to the technical field of induction power taking, and particularly relates to an induction power taking device of a non-closed magnetic core.
Background
At present, with the proposal of a double-carbon target, the development of a novel power system with intelligent sensing capability is a key ring, and massive wireless sensors are the key for realizing 'comprehensive sensing and interconnection'. The power supply problem of the power sensor is a core module which restricts the large-scale application of the power sensor. The power supply method for the electric power on-line monitoring sensor mainly comprises battery power supply, solar power supply, laser power supply, resonance coupling power supply, vibration power supply, capacitance voltage division power supply, magnetic field induction power supply and the like, wherein the induction power supply is most widely applied due to the stability and maturity of the induction power supply.
At present, the most common magnetic induction power-taking method is CT (Current Transformer) power-taking for an alternating magnetic field generated by an alternating Current cable and a line. The induction electricity taking module mainly uses a current transformer to directly induce alternating current voltage from a high-voltage bus, and then stable and reliable direct current voltage is obtained through rectification, filtering and voltage stabilization processing, so that a stable power supply is provided for a sensor arranged nearby, and long-term stable power supply can be ensured.
The induction electricity taking module mainly comprises a current transformer and a processing circuit at the rear end. The core devices in the current transformer are a magnetic core and a coil, and the magnetic core and the coil are used for gathering magnetic flux, so that the efficiency and the reliability of power taking are improved. Because the current-carrying capacity of the alternating current cable is changed along with factors such as load and the like, when the current-carrying capacity is small, the power-taking power of the coil of the CT magnetic core is low, an energy-taking dead zone exists, and when the current-carrying capacity is large, the CT magnetic core is saturated, so that the heating of the magnetic core and the power-taking efficiency are reduced, and the influence on a rear-stage circuit is also generated.
In order to protect the power taking device, an open-close type CT is provided, the open-close type CT is provided with an open-close type magnetic core, but the magnetic core is required to be designed according to the size of a corresponding cable, the open-close type CT cannot be suitable for cables with different voltage levels, the universality of the power taking device is reduced, the power supply cannot be rapidly installed, meanwhile, the open-close type magnetic core is formed by combining an upper magnetic core and a lower magnetic core, the magnetic cores are easy to displace when sealant is poured, and the problems that the magnetic cores are asymmetrical and mistakenly touched when the equipment is closed are caused.
The existing non-closed magnetic core induction electricity taking device can protect the electricity taking device and avoid the problem of mistaken touch when equipment is closed, but the defect that the output power of the electricity taking device is too low is overcome.
Disclosure of Invention
The invention aims to provide a non-closed magnetic core induction power taking device, which is used for protecting the power taking device and improving universality and output power.
In order to achieve the above object, the present invention provides an induction power-taking device with a non-closed magnetic core, comprising a non-closed drawable magnetic core coil assembly and a power management module connected thereto, wherein the drawable magnetic core coil assembly comprises a plurality of thin pillar-shaped magnetic cores and a magnetic core coil sleeved on the outer sides of all the thin pillar-shaped magnetic cores, and at least one part of the thin pillar-shaped magnetic cores is drawable relative to the magnetic core coil.
At least a part of the adjacent thin cylindrical magnetic cores are attached together in parallel, and the arrangement direction of the plurality of thin cylindrical magnetic cores is parallel to the extending direction of the cable to be collected.
The core coil assembly is a linear core coil assembly, and the thin cylindrical core includes only a linear thin cylindrical core having a linear overall shape.
The number of the linear thin column type magnetic cores is 7.
The core coil assembly is a right-angle core coil assembly, and the pillar core includes a plurality of straight pillar cores having a straight line overall shape and a plurality of right-angle pillar cores having two line segments extending outward from a right-angle vertex.
The number of the straight-line thin column type magnetic cores is 8, and the number of the right-angle thin column type magnetic cores is 3.
The section of the thin column type magnetic core is circular.
The magnetic core coil is provided with two ports, and the two ports of the magnetic core coil are both connected with the electric energy management module; one port of the magnetic core coil is connected with a capacitor in series and is connected with the electric energy management module through the capacitor, or the magnetic core coil is connected with a capacitor in parallel.
The magnetic core coil is made of pure copper.
The thin column type magnetic core is made of permalloy with initial relative magnetic conductivity of 50000.
The non-closed magnetic core is adopted in the induction electricity taking device of the non-closed magnetic core, the traditional whole magnetic core is equivalently replaced by a plurality of thin magnetic cores with higher effective magnetic conductivity, the magnetic core can be pulled to change the length of a circuit in the magnetic core, so that the output power and the power density of the whole magnetic core can be improved, and the problem that the induction electricity taking device is compatible with different voltage grades and cable diameter adaptation is solved due to different pulling lengths of the magnetic core. In addition, the capacitor arranged on the non-closed magnetic core adopts the resonance principle to eliminate coil self-inductance and improve the output efficiency.
Drawings
Fig. 1 is a schematic structural diagram of a non-closed magnetic core induction power-taking device according to an embodiment of the invention.
Fig. 2 is a schematic structural diagram of a linear movable core coil assembly of a non-closed core induction power taking apparatus according to an embodiment of the invention.
Fig. 3 is a schematic cross-sectional view of a linear type core coil assembly of a non-closed core induction power taking apparatus according to an embodiment of the invention.
Fig. 4 is a schematic structural diagram of a non-closed magnetic core induction power taking apparatus according to a second embodiment of the invention.
Fig. 5 is a schematic structural diagram of a rectangular shape withdrawable core coil assembly of a non-closed core induction power taking apparatus according to a second embodiment of the invention.
Detailed Description
The invention provides a non-closed magnetic core induction power taking device which comprises a non-closed magnetic core coil assembly capable of being drawn and an electric energy management module connected with the non-closed magnetic core coil assembly. In the present invention, the extractable magnetic core coil assembly may be a linear extractable magnetic core coil assembly or a right-angle extractable magnetic core coil assembly.
Example a non-closed core inductive power device with a linear, shiftable core coil assembly
As shown in fig. 1, the non-closed magnetic core induction power-taking apparatus of the present invention includes a linear movable magnetic core coil assembly 1 and a power management module 2 connected to the linear movable magnetic core coil assembly 1. The linear drawable magnetic core coil assembly 1 is clamped with the surface of a cable to be collected and is arranged to convert the magnetic energy of the cable to be collected into an output signal of the linear drawable magnetic core coil assembly 1; the power management module 2 is connected to the sensor load and configured to convert an output signal of the linear type twitch magnetic core coil assembly 1 into a stable supply voltage to be provided to the sensor load.
As shown in fig. 2, the linear movable core coil assembly 1 includes a plurality of thin pillar-shaped cores 3 and a core coil 4 disposed outside all the thin pillar-shaped cores 3, and at least a portion of the thin pillar-shaped cores 3 is movable relative to the core coil 4. At least one part of the adjacent thin cylindrical magnetic cores 3 are attached together in parallel, and the arrangement direction of the plurality of thin cylindrical magnetic cores 3 is parallel to the extending direction of the cable to be collected, so that the surface of the cable to be collected can be better attached.
Wherein, but the straight line shape twitch magnetic core coil pack 1 has adopted twitch formula structural design for further promotion power density, adopts a plurality of thin column type magnetic cores 3 that can twitch promptly, carries out relative displacement through thin column type magnetic core 3 with at least one twitch, outwards removes a section distance for magnetic core coil 4, increases the interior magnetic path length of magnetic core, can obtain bigger magnetic density. The specific distance that the thin column type magnetic core 3 moves outward is determined according to the output power result measured by experiment to reach the maximum output power.
The thin column type magnetic core 3 is made of permalloy with initial relative magnetic conductivity of 50000, and the sectional area and the length of the thin column type magnetic core can be adjusted according to the size and the current-carrying capacity of a measured object such as a cable to be collected. Under the condition that the sectional area and the length of the thin cylindrical magnetic core 3 are given through design, the extraction length of the magnetic core can be adaptively changed according to the size and the current-carrying capacity of a cable to be collected, so that the problem that the induction power taking device is compatible with different voltage grades and cable diameter adaptation is solved through different extraction lengths of the magnetic core. .
As shown in fig. 3, in the present embodiment, the thin columnar core 3 includes only linear thin columnar cores whose overall shapes are linear, and the number of the linear thin columnar cores 3 is 7. The section shape of the thin column type magnetic core 3 is circular, and after the relative permeability of the thin column type magnetic core 3 with the circular section shape is determined, the effective permeability is only related to the height-diameter ratio, and the more slender magnetic core has the larger effective permeability, so that the invention adopts 7 thin column type magnetic cores with the overall shape of straight lines to replace the commonly used cuboid magnetic core, and obtains a straight line magnetic core group with high effective permeability to improve the power density.
The magnetic core coil 4 is made of pure copper, and the diameter and the number of turns of the coil can be adjusted according to the requirement of a measured object such as a cable to be acquired. The magnetic core coil 4 has two ports, and the two ports of the magnetic core coil 4 are both connected with the power management module.
One port of the magnetic core coil 4 is connected in series with a capacitor (not shown), and is connected with the power management module 2 through the capacitor; or the magnetic core coil 4 is connected in parallel with a capacitor (i.e. both ports are connected with the capacitor). The capacitor is matched with the reactance of the coil, so that the power consumption of the inductance of the coil is weakened to improve the power taking and transmission efficiency, the self inductance of the coil is eliminated by adopting a resonance principle, and the output power is improved.
Second embodiment non-closed magnetic core induction power-taking device with rectangular core coil assembly capable of being pulled
As shown in fig. 4, the non-closed magnetic core induction power-taking device includes: a right angle twitch core coil assembly 5 and an electrical energy management module 6 connected to the right angle twitch core coil assembly 5. The right-angle type drawable magnetic core coil assembly 5 is clamped with the surface of the cable to be acquired, and is arranged to convert the magnetic energy of the cable to be acquired into an output signal of the right-angle type drawable magnetic core coil assembly 5; the power management module 6 is connected to the sensor load for converting the output signal of the rectangular shape twitchable magnetic core coil assembly 5 into a stable supply voltage for supplying to the sensor load.
As shown in fig. 5, the non-closed right-angled twitching core coil includes a plurality of thin cylindrical cores 7, and a core coil 8 disposed outside the thin cylindrical cores 7, and at least a portion of the thin cylindrical cores 7 is twitchable relative to the core coil. At least one part of the adjacent thin cylindrical magnetic cores 7 are attached together in parallel, and the arrangement direction of the plurality of thin cylindrical magnetic cores 7 is parallel to the extending direction of the cable to be collected, so that the surface of the cable to be collected can be better attached.
Wherein, magnetic core coil pack 5 can be twitched to the right-angle shape has adopted twitch formula structural design for further promotion power density, adopts a plurality of thin column type magnetic cores 7 that can twitch promptly, carries out relative displacement through thin column type magnetic core 7 with at least one, for magnetic core coil 8 a distance of outwards moving, increases magnetic path length in the magnetic core, can obtain bigger magnetic density. The specific distance that the thin columnar magnetic core 7 moves outward is determined according to experimental results to achieve maximum output power.
The thin column type magnetic core 7 is permalloy with initial relative permeability of 50000, and the sectional area and the length of the thin column type magnetic core can be adjusted according to the size and the current-carrying capacity of a measured object such as a cable to be collected.
In the present embodiment, the thin cylindrical core 7 includes a plurality of linear thin cylindrical cores having a straight overall shape and a plurality of right-angle thin cylindrical cores having an overall shape of two line segments extending outward from one right-angle vertex. The linear thin column type magnetic cores can be drawn, the number of the linear thin column type magnetic cores is 8, the right-angle thin column type magnetic cores cannot be drawn, and the number of the right-angle thin column type magnetic cores is 3. The cross-sectional shape of the fine columnar magnetic core 7 is circular. For the thin cylindrical magnetic core 7 with the circular cross section, after the relative magnetic conductivity is determined, the effective magnetic conductivity is only related to the height-diameter ratio, and the longer the magnetic core is, the larger the effective magnetic conductivity is, so that the invention adopts 8 thin cylindrical magnetic cores and 3 right-angle thin cylindrical magnetic cores to replace the commonly used right-angle magnetic cores, and obtains the magnetic core group with high effective magnetic conductivity to improve the power density.
The magnetic core coil 8 is made of pure copper, and the diameter and the number of turns of the coil can be adjusted according to the requirement of a measured object. The magnetic core coil 8 has two ports, and the two ports of the magnetic core coil 8 are both connected with the power management module.
One port of the magnetic core coil 8 is connected with a capacitor in series and is connected with the electric energy management module 6 through the capacitor; or the magnetic core coil 8 is connected in parallel with a capacitor (i.e. both ports are connected with the capacitor). The capacitor is matched with the reactance of the coil, so that the power consumption of the inductance of the coil is weakened to improve the power taking and transmission efficiency, the self inductance of the coil is eliminated by adopting a resonance principle, and the output power is improved.
Results of the experiment
Taking a 110kV single-core XLPE cable environment as an example, the design of the induction power taking device is carried out under the condition that the cable is electrified. The diameter of the cable is 105mm, and the main structure of the cable is as follows from inside to outside: copper core, interior semiconductor shielding layer, XLPE insulating layer, outer semiconductor shielding layer, metal sheath, outer insulating sheath.
Then, according to a first embodiment of the present invention, a technical solution of the non-closed magnetic core induction power-taking apparatus is:
the thin column type magnetic core 3 adopts permalloy with initial relative magnetic permeability of 50000, and the sectional area of the single thin column type magnetic core 3 is 31mm 2 The height of 7 thin column type magnetic cores 3 is the same as the height of the original cuboid magnetic core, and the height is 150 mm. The magnetic core coil 4 is a copper wire with a wire diameter of 0.5mm and a number of turns of 3000, the thickness of the coil area is 5mm, and the height of the coil area is 150 mm. The twitching structure twitches the 1 st and the 7 th thin column type magnetic cores 3 of the twitcheable magnetic core coil component to twitch 70mm to one side, the 5 th thin column type magnetic core 3 in the center twitches 70mm to the other side, and the whole length of the magnetic core after twitching is 290 mm. When the capacitor is matched with the capacitor in series connection, the capacitance value of the capacitor configured at the coil port of the magnetic core is 12.37 muF; when the capacitor adopts a matched parallel capacitor, the capacitance value is 12.19 mu F. In the embodiment of the invention, under the condition that the cable is flowed through 200A, the output power of the linear twitching magnetic core coil component 1 is 44 mW.
According to the second embodiment of the invention, the technical scheme of the non-closed magnetic core induction power taking device is as follows:
in the rectangular-shaped core-coil unit 5, a thin column type magnetThe material of the core 7 is permalloy with initial relative magnetic permeability of 50000, and the cross section area of the thin column type magnetic core 7 is 31mm 2 The height of 8 straight-line thin column type magnetic cores is 75mm, and the sum of two right-angle sides of 3 right-angle thin column type magnetic cores is 150 mm. The magnetic core coil 8 selects a copper wire with the wire diameter of 0.5mm and the number of turns of 3000, the thickness of the coil area is 5mm, and the sum of right-angle sides of two sides of the coil area is 150 mm. The twitch formula structure then twitch 3 rd and 5 th thin columnar order magnetic cores on magnetic core both sides and outwards twitch 50mm, and the magnetic core overall length after twitching is 177 mm. When the capacitor is matched with the capacitor in series connection, the capacitance value of the capacitor configured at the coil port of the magnetic core is 12.37 muF; when the capacitor adopts a matched parallel capacitor, the capacitance value is 12.19 mu F. In the embodiment of the invention, the output power of the induction electricity taking module is 50mW under the condition that the cable is in through-current 200A.
Therefore, the technical scheme of the first embodiment of the invention utilizes the linear pumping structure and the resonance principle to improve the output power, the technical scheme of the second embodiment of the invention utilizes the right-angle pumping structure and the resonance principle to improve the output power, the magnetic core is of the right-angle pumping structure, and the shape and the size of the magnetic core are optimally designed to achieve the optimal power output effect. According to the induction electricity taking device with the non-closed magnetic core, the magnetic core is changed from the closed type to the non-closed type, the problem that the induction electricity taking device is compatible with different voltage levels and cable diameter adaptation is solved, the traditional whole magnetic core is equivalently replaced by a plurality of thin magnetic cores with higher effective magnetic conductivity, the magnetic core can be pulled to change the length of a circuit in the magnetic core, the output power and the power density of the whole magnetic core can be improved, the power of the non-closed magnetic core induction electricity taking device is improved to an applicable level, a quick and low-cost online electricity taking mode is provided for a micro sensor for electric power, large-scale deployment and application of the electric sensor in the field of electric power monitoring are facilitated, and a brand-new solution is provided for the convenient, quick and low-cost induction electricity taking of the micro-nano electric sensor. In addition, the capacitor arranged on the non-closed magnetic core adopts the resonance principle to eliminate coil self-inductance and improve the output efficiency.

Claims (10)

1. The utility model provides an induction electricity-taking device of non-closed formula magnetic core which characterized in that, can twitch magnetic core coil pack and the electric energy management module who links to each other with it including non-closed formula, can twitch magnetic core coil pack and include a plurality of thin columnar magnetic cores and establish a magnetic core coil in the outside of all thin columnar magnetic cores, but at least a part of thin columnar magnetic core is twitch for the magnetic core coil.
2. The device of claim 1, wherein at least a portion of the adjacent pillar-shaped magnetic cores are attached to each other in parallel, and the arrangement direction of the pillar-shaped magnetic cores is parallel to the extension direction of the cable to be collected.
3. The non-closed magnetic core induction power taking device as claimed in claim 1, wherein the core coil assembly is a linear core coil assembly, and the pillar-shaped magnetic core comprises only a linear pillar-shaped magnetic core having a linear overall shape.
4. The induction power taking device with the non-closed magnetic core as claimed in claim 3, wherein the number of the linear thin cylindrical magnetic cores is 7.
5. An induction power taking device with a non-closed magnetic core according to claim 1, wherein said core coil assembly is a square core coil assembly, and said core is a rectangular core comprising a plurality of linear cores having a straight overall shape and a plurality of rectangular cores having an overall shape of two line segments extending from a right angle vertex.
6. The induction power taking device with the non-closed magnetic core as claimed in claim 5, wherein the number of the linear thin cylindrical magnetic cores is 8, and the number of the right-angle thin cylindrical magnetic cores is 3.
7. The non-closed magnetic core induction power taking device as claimed in claim 1, wherein the cross-sectional shape of the thin pillar type magnetic core is circular.
8. The non-closed magnetic core induction power taking device according to claim 1, wherein the magnetic core coil has two ports, and both ports of the magnetic core coil are connected with the power management module; one port of the magnetic core coil is connected with a capacitor in series and is connected with the electric energy management module through the capacitor, or the magnetic core coil is connected with a capacitor in parallel.
9. The device of claim 1, wherein the core coil is made of pure copper.
10. The induction power taking device with the non-closed magnetic core as claimed in claim 1, wherein the material of the thin column type magnetic core is permalloy with initial relative permeability of 50000.
CN202210601544.8A 2022-05-30 2022-05-30 Induction electricity taking device of non-closed magnetic core Pending CN114865802A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115714474A (en) * 2022-11-10 2023-02-24 南方电网数字电网研究院有限公司 Cable unilateral energy taking device
CN117955257A (en) * 2024-03-26 2024-04-30 国网上海市电力公司 Method and system for adaptively controlling electromagnetic induction energy taking of power transmission wire

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115714474A (en) * 2022-11-10 2023-02-24 南方电网数字电网研究院有限公司 Cable unilateral energy taking device
CN115714474B (en) * 2022-11-10 2024-03-22 南方电网数字电网研究院股份有限公司 Cable unilateral energy taking device
CN117955257A (en) * 2024-03-26 2024-04-30 国网上海市电力公司 Method and system for adaptively controlling electromagnetic induction energy taking of power transmission wire

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