WO2024093486A1

WO2024093486A1 - Power supply apparatus for power transmission line monitoring device

Info

Publication number: WO2024093486A1
Application number: PCT/CN2023/115851
Authority: WO
Inventors: 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
Priority date: 2022-10-31
Filing date: 2023-08-30
Publication date: 2024-05-10
Also published as: CN115549501A

Abstract

A power supply apparatus for a power transmission line monitoring device, said apparatus belonging to the technical field of power supply. The power supply apparatus comprises an energy acquisition module (1), a power transformation module, and a parameter adjustment module, wherein an energy acquisition end of the energy acquisition module is wrapped around a power transmission line, an output end thereof is connected to the power transformation module, and the energy acquisition module is used for acquiring electric energy from the power transmission line; an output end of the power transformation module is connected to the parameter adjustment module, and the power transformation module is used for converting obtained electric energy into electric energy matching a monitoring device; and an output end of the parameter adjustment module is connected to an input end of the monitoring device, and the parameter adjustment module is used for adjusting parameters of the obtained electric energy and transmitting the obtained electric energy to the monitoring device. The energy acquisition module is not prone to negatively affecting the normal operation of the power transmission line and can continuously obtain electric energy. The power supply stability is improved, such that the operation stability of the monitoring device is improved.

Description

Power supply device for transmission line monitoring equipment

Technical Field

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.

Background technique

With the accelerated development of smart grids, a large number of new green energy sources such as photovoltaics and wind power have been integrated into the grid, making the current signals in the grid include a large number of DC, high-order harmonics and high-frequency transient signals in addition to the power frequency. In addition, lightning strikes can also cause overvoltage signals. The generation of these signals will affect the safety, reliability and stability of the grid. In severe cases, the normal power supply of the grid may be hindered or even cause major accidents. Therefore, monitoring the voltage signal of the transmission line is a very important measure.

In order to ensure that the monitoring equipment does not affect the power transmission of the transmission line as much as possible, non-contact monitoring methods are usually used. However, whether it is a sensor monitoring device or a collection monitoring device, 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.

In the existing technology, solar power supply and temperature difference energy extraction are usually adopted, but solar energy and temperature difference are highly correlated with the environment. They are greatly affected by the environment and are prone to unstable output power, which affects the power supply demand of the monitoring equipment.

Summary of the invention

In view of this, 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. In order to achieve one or part or all of the above purposes or other purposes, 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.

Preferably, 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.

Preferably, 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.

Preferably, 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.

Preferably, 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.

Preferably, 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.

Preferably, 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;

If there is no match, an alarm is issued. Preferably, 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. Preferably, 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.

Preferably, 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.

Implementing the embodiments of the present invention will have the following beneficial effects:

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.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

in:

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.

Detailed ways

The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

In the following description, reference is made to “some embodiments”, which describe a subset of all possible embodiments, but it will be understood that “some embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present invention belongs. The examples are not intended to limit the present invention.

The embodiment of the present application provides a power supply device for a transmission line monitoring device. In the prior art, solar power supply and temperature difference energy extraction are usually used to power the monitoring equipment on the transmission line. However, 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.

In order to overcome the above technical defects, the power supply device of a transmission line monitoring device provided in an embodiment of the present application, as shown in FIG1, includes an energy acquisition module 1, a power conversion module and a parameter adjustment module. Among them, 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.

Specifically, in one embodiment, after 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, and 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.

In another embodiment of the present application, as shown in Fig. 2 , the power conversion module includes a high-frequency transformer. Specifically, in one embodiment, 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 .

Specifically, in one embodiment, 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.

For ease of understanding, in one embodiment, as shown in FIG3 , Ic is the conduction current, Id is the displacement current, S1 is the inner area of the coaxial capacitor, and S2 is the outer area of the coaxial capacitor. According to Ampere's loop theorem:

The charge density on the coaxial side is δ. During the charging and discharging process of the capacitor, the charge accumulation on the plate will change over time. Then the conduction current is:

From the formula of electric displacement flux, we can know that the conduction current can be expressed as:

As can be seen from Figure 2, the displacement current on the right is:

The electric displacement vector in the coaxial container can be expressed as:

Among them, ε ₀ is the dielectric constant in vacuum, ε _r is the relative dielectric constant of the medium in the container, is the electric field strength vector, is the polarization intensity vector, and the displacement current in the coaxial container is:

The relationship between the capacitor charge and voltage is Q = CU. In the time-varying circuit, the displacement current flowing through the capacitor is

By deriving the above formula, 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.

Specifically, in one embodiment, 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.

That is, 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.

Specifically, in one embodiment, 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. In addition, 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.

Specifically, in one embodiment, 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.

By adding the voltage doubling rectifier unit 4 and the voltage stabilizing unit 5 to process the current, 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.

In another embodiment of the present application, as shown in FIG. 2 , the voltage doubler rectifying unit 4 includes a first diode D1 , a second diode D2 , a third capacitor C3 and a fourth capacitor C4 .

In one embodiment, 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.

Specifically, 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.

In another embodiment of the present application, as shown in FIG2 , 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.

Specifically, in one embodiment, 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.

In another embodiment of the present application, as shown in Fig. 2, 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.

Specifically, in one embodiment, 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. When 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.

By setting a voltage drop detection module 7 for detecting the voltage value, 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.

In another embodiment of the present application, as shown in Fig. 2, 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.

Specifically, in one embodiment, 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. When the energy provided to the monitoring device cannot reach the predetermined power, the voltage drop energy supply module 6 outputs power to the monitoring device.

In another embodiment of the present application, as shown in FIG2 , 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.

In another embodiment of the present application, as shown in FIG2 , 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.

Specifically, in one embodiment, 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 .

It should be understood that "one embodiment" or "an embodiment" mentioned throughout the specification means that specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present invention. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. It should be understood that in various embodiments of the present invention, the size of the serial number of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present invention. The serial numbers of the above-mentioned embodiments of the present invention are only for description and do not represent the advantages and disadvantages of the embodiments.

It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

In the several embodiments provided by the present invention, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as: multiple units or components can be combined, or can be integrated into another system, or some features can be ignored, or not executed. In addition, 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.

In addition, 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.

A person of ordinary skill in the art can understand that all or part of the steps of implementing the above method embodiment can be completed by hardware related to program instructions, and the aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it executes the steps of the above method embodiment; and the aforementioned storage medium includes: various media that can store program codes, such as mobile storage devices, ROMs, magnetic disks or optical disks.

Alternatively, if 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. Based on this understanding, 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.

The above disclosure is only a preferred embodiment of the present invention, which certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

Claims

A power supply device for a transmission line monitoring device, characterized in that it comprises 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 to obtain electrical energy from the transmission line;

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 supply device of the transmission line monitoring device according to claim 1, characterized in that the power transformation module comprises 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 power supply device of the transmission line monitoring equipment according to claim 2, characterized in that 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 power supply device of the transmission line monitoring equipment according to claim 1, characterized in that 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 power supply device of the transmission line monitoring equipment according to claim 4, characterized in that the voltage doubler rectifier 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 power supply device of the transmission line monitoring device according to claim 4, characterized in that 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, the output end of the voltage stabilizing chip is connected to one end of the fifth capacitor C5, and the ground end of the voltage stabilizing chip is grounded;

The other end of the fifth capacitor C5 is grounded.
The power supply device of the transmission line monitoring equipment according to claim 4, characterized in that the voltage doubler rectifier 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;

If they do not match, an alarm will be issued.
The power supply device of the transmission line monitoring device according to claim 7, characterized in that 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 energy 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 power supply device of the transmission line monitoring device according to claim 8, characterized in that the voltage drop energy 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 monitoring Input connection of the test equipment;

The source of the field effect transistor Q3 is connected to the output end of the monitoring device.
The power supply device of the transmission line monitoring device according to any one of claims 7 to 9, characterized in that 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.