WO2024093486A1 - Appareil d'alimentation électrique pour dispositif de surveillance de ligne de transmission de puissance - Google Patents

Appareil d'alimentation électrique pour dispositif de surveillance de ligne de transmission de puissance Download PDF

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Publication number
WO2024093486A1
WO2024093486A1 PCT/CN2023/115851 CN2023115851W WO2024093486A1 WO 2024093486 A1 WO2024093486 A1 WO 2024093486A1 CN 2023115851 W CN2023115851 W CN 2023115851W WO 2024093486 A1 WO2024093486 A1 WO 2024093486A1
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WO
WIPO (PCT)
Prior art keywords
capacitor
voltage
module
monitoring device
transmission line
Prior art date
Application number
PCT/CN2023/115851
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English (en)
Chinese (zh)
Inventor
谭向宇
唐立军
赵现平
李文云
卢勇
徐肖伟
张文斌
彭兆裕
Original Assignee
云南电网有限责任公司电力科学研究院
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Publication of WO2024093486A1 publication Critical patent/WO2024093486A1/fr

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Classifications

    • 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
    • H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M7/25—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only arranged for operation in series, e.g. for multiplication of voltage

Definitions

  • the present invention relates to the technical field of power supply, and in particular to a power supply device for power transmission line monitoring equipment.
  • non-contact monitoring methods are usually used.
  • the back-end circuit mostly adopts the design of active devices. As a result, how to continuously power the active devices on the high-voltage transmission line has become an urgent problem to be solved.
  • the present invention provides a power supply device for a transmission line monitoring device, which is used to solve the problem of unstable power supply in the prior art.
  • the present invention proposes a power supply device for a transmission line monitoring device, in a first aspect:
  • a power supply device for a transmission line monitoring device comprising an energy acquisition module, a power transformation module and a parameter adjustment module;
  • the energy-taking end of the energy-taking module is wrapped around the transmission line, and the output end is connected to the power conversion module. Capture electrical energy from transmission lines;
  • the output end of the power conversion module is connected to the parameter adjustment module, and is used to convert the obtained electric energy into electric energy matching the monitoring equipment;
  • the output end of the parameter adjustment module is connected to the input end of the monitoring device, and is used to adjust the obtained electric energy and transmit it to the monitoring device.
  • the power conversion module includes a high-frequency transformer
  • the energy acquisition module includes a first capacitor C1 and a pulse discharge unit;
  • the first capacitor C1 is wrapped around the transmission line, and the output end of the first capacitor C1 is connected to the input end of the pulse discharge unit;
  • the input end of the pulse discharge unit is connected to one end of the high-frequency transformer, and the output end of the pulse discharge unit and the other end of the high-frequency transformer are both grounded.
  • the pulse discharge unit is a second capacitor C2;
  • One end of the second capacitor C2 is connected to the high frequency transformer, and the other end of the second capacitor C2 is grounded.
  • the parameter adjustment module includes a voltage doubling rectifier unit and a voltage stabilizing unit;
  • the input end of the voltage doubler rectifying unit is connected to the output end of the power conversion module, and the output end of the voltage doubler rectifying unit is connected to the input end of the voltage stabilizing unit, for increasing and/or transforming the obtained electric energy;
  • the output end of the voltage stabilizing unit is connected to the input end of the monitoring device for stabilizing the obtained electric energy.
  • the voltage doubler rectifying unit comprises a first diode D1, a second diode D2, a third capacitor C3 and a fourth capacitor C4;
  • the first diode D1 is connected in series with the third capacitor C3;
  • the second diode D2 is connected in series with the fourth capacitor C4;
  • the series circuit of the first diode D1 and the third capacitor C3 is connected in parallel with the series circuit of the second diode D2 and the fourth capacitor C4.
  • the voltage stabilizing unit comprises a voltage stabilizing chip and a fifth capacitor C5;
  • the input end of the voltage stabilizing chip is connected to the fourth capacitor C4, and the output end of the voltage stabilizing chip is connected to the fourth capacitor C4. connected to one end of the fifth capacitor C5, and the grounding end of the voltage stabilizing chip is grounded;
  • the other end of the fifth capacitor C5 is grounded.
  • the voltage doubler rectifying unit is connected in parallel with a voltage drop detection module
  • the voltage drop detection module is used to detect whether the voltage of the electric energy output by the voltage doubler rectifier unit matches a preset target voltage
  • the voltage drop detection module is connected to a voltage drop energy supply module
  • the voltage drop energy supply module is connected in parallel with the monitoring device
  • the voltage drop power supply module is used to supply power to the monitoring device when the voltage detected by the voltage drop detection module does not match the target voltage.
  • the voltage drop power supply module includes a first resistor R1, a DC power supply, a third diode D3 and a field effect transistor Q3;
  • the DC power supply is connected to the drain of the field effect transistor Q3, one end of the first resistor R1 is connected to the gate of the field effect transistor Q3, and the other end of the first resistor R1 is grounded;
  • the anode of the third diode D3 is connected to the gate of the field effect transistor Q3, and the cathode is connected to the input terminal of the monitoring device;
  • the source of the field effect transistor Q3 is connected to the output end of the monitoring device.
  • the voltage drop detection module includes a second resistor R2, a third resistor R3, a fourth diode D4, a sixth capacitor C6, a fourth resistor R4, a first transistor Q1, a fifth resistor R5 and a second transistor Q2;
  • the second resistor R2 is connected in series with the third resistor R3; the second resistor R2 is connected in parallel with the fourth resistor R4 and the sixth resistor R6;
  • the base of the first transistor Q1 is connected to the positive electrode of the fourth resistor R4, the emitter is connected to the cathode of the fourth resistor R4 and the positive electrode of the sixth resistor R6, and the collector is connected to the fifth resistor R5;
  • the base of the second transistor Q2 is connected to the other end of the fifth resistor R5, the emitter is grounded, and the collector is connected to the output end of the voltage drop detection module.
  • the energy acquisition module obtains the electric energy in the transmission line, forms a current and transmits it to the transformer module. After the current is processed by the transformer module, the type of current is adapted to the monitoring device. Finally, the parameter adjustment module is used to adjust the current and other parameters and output them to the monitoring device.
  • the monitoring device can obtain applicable electric energy to ensure the normal operation of the monitoring device. Compared with solar power supply and temperature difference power supply, the energy acquisition module is not only less likely to have a negative impact on the normal operation of the transmission line, but also can continuously obtain electric energy. The power supply stability is improved, thereby improving the stability of the monitoring equipment.
  • FIG1 is a structural block diagram of a power supply device of a transmission line monitoring device in one embodiment.
  • FIG. 2 is a circuit diagram of a power supply device of a power transmission line monitoring device according to an embodiment.
  • FIG3 is a schematic diagram of an energy extraction module in a power supply device of a transmission line monitoring device in one embodiment.
  • the embodiment of the present application provides a power supply device for a transmission line monitoring device.
  • solar power supply and temperature difference energy extraction are usually used to power the monitoring equipment on the transmission line.
  • solar energy and temperature difference are highly correlated with the environment. They are greatly affected by the environment, and the output power is prone to instability, which affects the power supply demand of the monitoring equipment.
  • the power supply device of a transmission line monitoring device includes an energy acquisition module 1, a power conversion module and a parameter adjustment module.
  • the energy acquisition end of the energy acquisition module 1 is wrapped around the transmission line, and the current output end is connected to the power conversion module to obtain the electric energy in the transmission line. And the current is transmitted to the current input end of the power conversion module.
  • the current output terminal of the power conversion module is connected to the current input terminal of the parameter adjustment module; the power conversion module is used to convert the electric energy obtained from the energy acquisition module 1 into electric energy matching the monitoring device. Specifically, in one embodiment, the power conversion module converts the obtained electric energy into electric energy within the rated voltage range of the monitoring device.
  • the output end of the parameter adjustment module is connected to the input end of the monitoring device, and is used to adjust the obtained electric energy and transmit it to the monitoring device.
  • the current input end of the parameter adjustment module obtains the current transmitted by the power transformation module
  • the current is converted into a direct current
  • the voltage value of the direct current is stabilized within the rated voltage range of the monitoring device.
  • the electric energy in the transmission line is obtained through the energy acquisition module 1, and the electric current is transmitted to the transformer module. After the current is processed by the transformer module, the type of the current is adapted to the monitoring device. Finally, the parameter adjustment module is used to adjust the current and other parameters, and output them to the monitoring device.
  • the monitoring device can obtain applicable electric energy to ensure the normal operation of the monitoring device. Compared with solar power supply and temperature difference energy supply, the energy acquisition module 1 is not only less likely to have a negative impact on the normal operation of the transmission line, but also can continuously obtain electric energy. The power supply stability is improved, thereby improving the stability of the monitoring equipment.
  • the power conversion module includes a high-frequency transformer.
  • the power conversion module is a high-frequency transformer 3 .
  • the energy acquisition module 1 includes a first capacitor C1 and a pulse discharge unit 2.
  • the first capacitor C1 Wrapped on the transmission line, the output end of the first capacitor C1 is connected to the input end of the pulse discharge unit 2 .
  • the first capacitor C1 is a high-voltage energy-taking capacitor, which is a clamp-shaped hollow cylindrical coaxial high-voltage power-taking capacitor, and is sleeved on the transmission line.
  • the current output end of the first capacitor C1 is connected to the current input end of the pulse discharge unit 2.
  • Ic is the conduction current
  • Id is the displacement current
  • S1 is the inner area of the coaxial capacitor
  • S2 is the outer area of the coaxial capacitor.
  • the charge density on the coaxial side is ⁇ .
  • the charge accumulation on the plate will change over time. Then the conduction current is:
  • the electric displacement vector in the coaxial container can be expressed as:
  • ⁇ 0 is the dielectric constant in vacuum
  • ⁇ r is the relative dielectric constant of the medium in the container
  • the displacement current in the coaxial container is:
  • the maximum displacement current can be obtained by selecting a suitable capacitance value for the high-voltage energy-taking capacitor.
  • the input end of the pulse discharge unit 2 is connected to one end of the high-frequency transformer 3 , and the output end of the pulse discharge unit 2 and the other end of the high-frequency transformer 3 are both grounded.
  • the current input end of the pulse discharge unit 2 is connected to the current output end of the first capacitor C1 and the high voltage side of the high frequency transformer 3.
  • the current output end of the pulse discharge unit 2 and the other end of the high voltage side of the high frequency transformer 3 are both grounded.
  • the pulse discharge unit is a second capacitor C2.
  • One end of the second capacitor C2 is connected to the high-frequency transformer 3, and the other end of the second capacitor C2 is grounded.
  • the positive electrode of the second capacitor C2 is connected to the high voltage side of the high frequency transformer 3, and the negative electrode is grounded.
  • the parameter adjustment module includes a voltage doubling rectifier unit 4 and a voltage stabilizing unit 5.
  • the input end of the voltage doubling rectifier unit 4 is connected to the output end of the power conversion module, and the output end of the voltage doubling rectifier unit 4 is connected to the input end of the voltage stabilizing unit 5, for increasing and/or transforming the obtained electric energy.
  • the current input end of the voltage doubler rectifier unit 4 is connected to the low voltage side of the high frequency transformer 3, and is used to receive the current output by the high frequency transformer 3.
  • the current output end of the voltage doubler rectifier unit 4 is connected to the current input end of the voltage stabilizing unit 5.
  • the voltage doubler rectifier unit 4 is used to convert the received current into the current type required by the monitoring device, such as converting AC current into DC current.
  • the voltage doubler rectifier unit 4 is also used to increase the voltage exponentially when the obtained current cannot meet the power demand of the monitoring device.
  • the output end of the voltage stabilizing unit 5 is connected to the input end of the monitoring device for stabilizing the obtained electric energy.
  • the current output terminal of the voltage stabilizing unit 5 is connected to the current input terminal of the monitoring device.
  • the voltage stabilizing unit 5 is used to stabilize an input voltage greater than a specified voltage, that is, to stabilize a rated voltage greater than the monitoring device within a preset range.
  • the current provided to the monitoring device can meet the normal working requirements of the monitoring device, so that the monitoring device can obtain continuous and stable electric energy.
  • the voltage doubler rectifying unit 4 includes a first diode D1 , a second diode D2 , a third capacitor C3 and a fourth capacitor C4 .
  • the first diode D1 is connected in series with the third capacitor C3; the second diode D2 is connected in series with the fourth capacitor C4; and the series circuit of the first diode D1 and the third capacitor C3 is connected in parallel with the series circuit of the second diode D2 and the fourth capacitor C4.
  • the anode of the first diode D1 and one end of the fourth capacitor C4 are both connected to the anode terminal of the voltage doubler rectifier unit 4.
  • the cathode of the first diode D1 is connected to one end of the third capacitor C3, and the other end of the third capacitor C3 is connected to the negative terminal of the voltage doubler rectifier unit 4.
  • the other end of the fourth capacitor C4 is connected to the cathode of the second diode D2, and the anode of the second diode D2 is connected to the negative terminal of the voltage doubler rectifier unit 4.
  • the voltage stabilizing unit includes a voltage stabilizing chip 13 and a fifth capacitor C5.
  • the input end of the voltage stabilizing chip 13 is connected to the fourth capacitor C4, the output end of the voltage stabilizing chip 13 is connected to one end of the fifth capacitor C5, and the ground end of the voltage stabilizing chip 13 is grounded.
  • the other end of the fifth capacitor C5 is grounded.
  • the current input end of the voltage stabilizing chip 13 is connected to the current output end of the voltage doubling rectifier unit 4 for receiving current.
  • the current output end of the voltage stabilizing chip 13 is connected to the positive electrode of the fifth capacitor C5, and the ground end is grounded.
  • the negative electrode of the fifth capacitor C5 is grounded.
  • the voltage value is adjusted by the voltage stabilizing circuit formed by the voltage stabilizing chip 13 and the fifth capacitor C5, so as to facilitate the control of the input power of the monitoring device and make the monitoring device work in the rated power state.
  • the monitoring device is not easy to be damaged and the working state is more stable.
  • the voltage doubler rectifying unit 4 is connected in parallel with a voltage drop detection module 7.
  • the voltage drop detection module 7 is used to detect whether the voltage of the electric energy output by the voltage doubler rectifying unit 4 matches the preset target voltage; if not, an alarm is issued.
  • the current input end of the voltage drop detection module 7 is connected to the current output end of the voltage doubler rectifier unit 4.
  • the current output end of the voltage drop detection module 7 is connected to an alarm component.
  • the voltage output by the voltage doubler rectifier unit 4 is less than the target voltage
  • the current or voltage output by the voltage drop detection module 7 is less than the detection value of the alarm component, triggering the alarm component to alarm. If the voltage of the electric energy output by the voltage doubler rectifier unit 4 is greater than or equal to the target voltage, the current or voltage output by the voltage drop detection module 7 is greater than or equal to the detection value of the alarm component, and no alarm is triggered.
  • the voltage abnormality can be discovered in time, so as to adjust the energy acquisition module 1 or compensate the voltage, so as to ensure that the monitoring equipment can obtain normal power supply.
  • the voltage drop detection module 7 is connected to a voltage drop energy supply module 6.
  • the voltage drop energy supply module 6 is connected in parallel with the monitoring device; the voltage drop energy supply module 6 is used to supply power to the monitoring device when the voltage detected by the voltage drop detection module 7 does not match the target voltage.
  • the current input end of the voltage drop energy supply module 6 is connected to the current output end of the voltage stabilizing module 5.
  • the voltage drop energy supply module 6 outputs power to the monitoring device.
  • the voltage drop energy supply module 6 includes a first resistor R1, a DC power supply 18, a third diode D3 and a field effect transistor Q3.
  • the DC power supply 18 is connected to the drain of the field effect transistor Q3, one end of the first resistor R1 is connected to the gate of the field effect transistor Q3, and the other end of the first resistor R1 is grounded; the anode of the third diode D3 is connected to the gate of the field effect transistor Q3, and the cathode is connected to the input end of the monitoring device; the source of the field effect transistor Q3 is connected to the output end of the monitoring device.
  • the voltage drop detection module includes a second resistor R2, a third resistor R3, a fourth diode D4, a sixth capacitor C6, a fourth resistor R4, a first transistor Q1, a fifth resistor R5, and a second transistor Q2.
  • the second resistor R2 is connected in series with the third resistor R3; the second resistor R2 is connected in parallel with the fourth diode D4 and the sixth capacitor C6; the base of the first transistor Q1 is connected to one end of the fourth resistor R4, the emitter is connected to the cathode of the fourth diode D4 and one end of the sixth capacitor C6, and the collector is connected to the fifth resistor R5; the base of the second transistor Q2 is connected to the other end of the fifth resistor R5, the emitter is grounded, and the collector is connected to the output end of the voltage drop detection module.
  • one end of the second resistor R2 is connected to the current input end of the voltage drop detection module 7, and the other end of the second resistor R2 is respectively connected to one end of the third resistor R3 and the positive electrode of the fourth diode D4.
  • the other end of the third resistor R3 is grounded.
  • the cathode of the fourth diode D4 is respectively connected to one end of the sixth capacitor C6 and the emitter of the first triode Q1.
  • the other end of the sixth capacitor C6 is grounded.
  • the base of the first transistor Q1 is connected to one end of the fourth resistor R4, and the other end of the fourth resistor R4 is connected to the negative terminal of the voltage drop detection module 7.
  • the collector of the first transistor Q1 is connected to one end of the fifth resistor R5.
  • the other end of the fifth resistor R5 is connected to the base of the second transistor Q2.
  • the emitter is grounded, and the collector is connected to the current output terminal Output of the voltage drop detection module 7 .
  • the disclosed devices and methods can be implemented in other ways.
  • the device embodiments described above are only schematic.
  • the division of the units is only a logical function division.
  • the coupling, direct coupling, or communication connection between the components shown or discussed can be through some interfaces, and the indirect coupling or communication connection of the devices or units can be electrical, mechanical or other forms.
  • the units described above as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units; they may be located in one place or distributed on multiple network units; some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.
  • all functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be separately used as a unit, or two or more units may be integrated into one unit; the above-mentioned integrated units may be implemented in the form of hardware or in the form of hardware plus software functional units.
  • the above-mentioned integrated unit of the present invention is implemented in the form of a software function module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.
  • the technical solution of the embodiment of the present invention, or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a device to execute all or part of the methods described in each embodiment of the present invention.
  • the aforementioned storage medium includes: various media that can store program codes, such as mobile storage devices, ROMs, magnetic disks or optical disks.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Rectifiers (AREA)
  • Measurement Of Current Or Voltage (AREA)

Abstract

La présente invention porte sur un appareil d'alimentation électrique pour un dispositif de surveillance de ligne de transmission de puissance, ledit appareil appartenant au domaine technique de l'alimentation électrique. L'appareil d'alimentation électrique comprend un module d'acquisition d'énergie (1), un module de transformation de puissance et un module de réglage de paramètre, une extrémité d'acquisition d'énergie du module d'acquisition d'énergie étant enroulée autour d'une ligne de transmission de puissance, une extrémité de sortie de celui-ci étant connectée au module de transformation de puissance et le module d'acquisition d'énergie étant utilisé pour acquérir de l'énergie électrique à partir de la ligne de transmission de puissance ; une extrémité de sortie du module de transformation de puissance étant connectée au module de réglage de paramètre et le module de transformation de puissance étant utilisé pour convertir l'énergie électrique obtenue en énergie électrique correspondant à un dispositif de surveillance ; et une extrémité de sortie du module de réglage de paramètre étant connectée à une extrémité d'entrée du dispositif de surveillance et le module de réglage de paramètre étant utilisé pour régler des paramètres de l'énergie électrique obtenue et transmettre l'énergie électrique obtenue au dispositif de surveillance. Le module d'acquisition d'énergie n'est pas susceptible d'affecter négativement le fonctionnement normal de la ligne de transmission de puissance et peut obtenir en continu de l'énergie électrique. La stabilité de l'alimentation électrique est améliorée, de telle sorte que la stabilité de fonctionnement du dispositif de surveillance est améliorée.
PCT/CN2023/115851 2022-10-31 2023-08-30 Appareil d'alimentation électrique pour dispositif de surveillance de ligne de transmission de puissance WO2024093486A1 (fr)

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CN202211344880.5 2022-10-31
CN202211344880.5A CN115549501A (zh) 2022-10-31 2022-10-31 输电线监测设备的供电装置

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Publication number Priority date Publication date Assignee Title
CN115549501A (zh) * 2022-10-31 2022-12-30 云南电网有限责任公司电力科学研究院 输电线监测设备的供电装置

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CN113740679A (zh) * 2021-08-06 2021-12-03 西安交通大学 一种电容限流取电装置及其局部放电量降低方法
CN115549501A (zh) * 2022-10-31 2022-12-30 云南电网有限责任公司电力科学研究院 输电线监测设备的供电装置

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Publication number Priority date Publication date Assignee Title
US20100253318A1 (en) * 2009-02-02 2010-10-07 Thomas Sr Kirk High voltage to low voltage inductive power supply with current sensor
CN102545688A (zh) * 2011-12-12 2012-07-04 中国电力科学研究院 一种功率脉冲发生装置、其驱动方法以及高压线取电方法
CN202424548U (zh) * 2011-12-12 2012-09-05 中国电力科学研究院 一种取能单元及无源高压在线监测装置
CN104377739A (zh) * 2014-11-28 2015-02-25 国网河南省电力公司漯河供电公司 一种塔杆线路高压电容降压取电的监测设备供电系统
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CN112350594A (zh) * 2020-10-21 2021-02-09 南方电网数字电网研究院有限公司 开关电路、供电设备和电器设备
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CN115549501A (zh) * 2022-10-31 2022-12-30 云南电网有限责任公司电力科学研究院 输电线监测设备的供电装置

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