阅读说明：本技术 一种输电线路带电作业电位转移电弧电磁辐射特性模拟试验平台 (Transmission line live working potential transfer arc electromagnetic radiation characteristic simulation test platform ) 是由 黎鹏 熊胜鹏 刘建犇 彭勇 刘凯 吴田 普子恒 方春华 于 2020-05-29 设计创作，主要内容包括：一种输电线路带电作业电位转移电弧电磁辐射特性模拟试验平台,包括电压发生系统、电位转移装置、测量系统,所述电压发生系统,用于产生高电压,模拟输电线路的运行电压；所述电位转移装置,用于在模拟导线与转移电极之间产生电弧,模拟电位转移电弧；所述测量系统,用于测量试验过程中的相关物理量,并显示各测量信号的波形。本发明试验平台可对电位转移电流大小和转移电弧的辐射电场和磁场信息进行同步测量,较为准确的反映了电位转移电弧的电磁辐射特性。(A simulation test platform for electromagnetic radiation characteristics of a potential transfer arc in live working of a power transmission line comprises a voltage generation system, a potential transfer device and a measurement system, wherein the voltage generation system is used for generating high voltage and simulating the operating voltage of the power transmission line; the potential transfer device is used for generating electric arcs between the simulation lead and the transfer electrode and simulating the potential transfer electric arcs; the measuring system is used for measuring relevant physical quantities in the test process and displaying the waveform of each measuring signal. The test platform can synchronously measure the magnitude of the potential transfer current and the information of the radiation electric field and the magnetic field of the transferred arc, and more accurately reflects the electromagnetic radiation characteristic of the potential transfer arc.)

1. The utility model provides a transmission line live working potential transfer electric arc electromagnetic radiation characteristic simulation test platform, includes voltage generation system, potential transfer device, measurement system, its characterized in that:

the voltage generation system is used for generating high voltage and simulating the operating voltage of the power transmission line;

the potential transfer device is used for generating an electric arc between the simulation lead (13) and the transfer electrode (29) and simulating a potential transfer electric arc;

the measuring system is used for measuring relevant physical quantities in the test process and displaying the waveform of each measuring signal.

2. The electric transmission line live-wire work potential transfer arc electromagnetic radiation characteristic simulation test platform according to claim 1, characterized in that: the voltage generation system comprises a voltage regulator (11), a power frequency test transformer (12), a simulation lead (13) and a voltage-equalizing ball (14), wherein the input voltage of the voltage regulator (11) is power frequency voltage, the output end of the voltage regulator (11) is connected with the input end of the power frequency test transformer (12), and the output end of the power frequency test transformer (12) is connected with the simulation lead (13) in series; and both ends of the simulation lead (13) are provided with voltage-sharing balls (14).

3. The electric transmission line live-wire work potential transfer arc electromagnetic radiation characteristic simulation test platform according to claim 1, characterized in that: the potential transfer device is located one side of the voltage generation system and is reserved with an insulation distance, and the potential transfer device comprises: the device comprises a stepping motor (21), a remote controller (22), a speed reducer (23), a coupling (24), a sliding seat (25), a ball screw (26), a base (27), a transfer rod (28) and a transfer electrode (29);

the speed reducer (23) is connected with the stepping motor (21), the upper end of the coupler (24) is connected with an output shaft of the stepping motor (21), the lower end of the coupler (24) is connected with the upper end of the ball screw (26), the ball screw (26) and the stepping motor (21) rotate together to transmit torque, and the lower end of the ball screw (26) is fixedly connected with the base (27);

the ball screw (26) is provided with a sliding seat (25), the sliding seat (25) is fixedly provided with a transfer rod (28), the transfer rod (28) is connected with a transfer electrode (29), the stepping motor (21) controls the ball screw (26) to rotate, so that the sliding seat (25) is driven to move up and down, and the sliding seat (25) can drive the transfer rod (28) to move up and down and is used for changing the distance between the transfer electrode (29) and the simulation lead (13);

the up-and-down movement of the slide seat (25) is realized by controlling the forward and reverse rotation of the stepping motor (21) through a remote controller (22).

4. The electric transmission line live-wire work potential transfer arc electromagnetic radiation characteristic simulation test platform according to claim 2, characterized in that: the side surface of the transfer rod (28) is perforated, the end part of the transfer electrode (29) is provided with a thread with corresponding size, and the transfer electrode (29) is connected with the transfer rod (28) through thread matching so as to be convenient for replacing the transfer electrode (29).

5. The electric transmission line live-wire work potential transfer arc electromagnetic radiation characteristic simulation test platform according to claim 2, characterized in that: the measurement system includes: the antenna comprises a biconical antenna (31), a loop antenna (32), a voltage divider (33), a coaxial shunt (34), a transmission optical fiber (35), a data acquisition card (36) and a PC (37);

the coaxial shunt (34) is connected in series between the power frequency test transformer (12) and the analog lead (13), is close to the analog lead (13), and is used for measuring potential transfer current; the high-voltage side of the voltage divider (33) is connected between the power frequency test transformer (12) and the simulation lead (13) and is used for measuring the voltage applied to the simulation lead (13); the biconical antenna (31) and the annular antenna (32) are positioned on one side of the test platform and are respectively used for measuring electric field radiation and magnetic field radiation;

the coaxial shunt (34), the voltage divider (33), the biconical antenna (31) and the annular antenna (32) are connected with a data acquisition card (36) through a transmission optical fiber (35), and the data acquisition card (36) is connected with a PC (37), so that the waveform of each measurement signal is displayed.

6. The method for simulating the electromagnetic radiation characteristic of the potential transfer arc in the live-line work of the power transmission line by adopting the simulation test platform as claimed in any one of claims 1 to 5 is characterized in that: after a power frequency high voltage is generated on the simulation lead (13) by using a power frequency test transformer (12), a potential transfer device is used for controlling a transfer electrode (29) to move up and down, and the transfer electrode (29) moves upwards to be close to the simulation lead (13) so as to simulate the process of entering equipotential during live working; the process of generating equipotential by live working is simulated by moving the transfer electrode (29) downwards to be far away from the simulation lead (13); in the process of entering and exiting equipotential, an arc discharge phenomenon can be generated between the transfer electrode (29) and the simulation lead (13), so that the electromagnetic radiation characteristic of the arc can be measured.

Technical Field

The invention relates to the technical field of live-line work detection of power transmission lines, in particular to a live-line work potential transfer arc electromagnetic radiation characteristic simulation test platform for a power transmission line.

Background

The live working technology is an important technical means for ensuring safe and reliable operation of a line, can effectively avoid power failure and reduce economic loss, and becomes an important method for fault detection, maintenance and transformation of a high-voltage transmission line after decades of research and application. In the equipotential live working of the transmission line, potential transfer can occur in the process that an operator wearing the shielding clothes enters or breaks away from the equipotential under the condition of a certain distance by hands or tools, and a large number of tests show that: arcing occurs during the potential transfer process. In the burning process, the electric arc radiates broadband high-intensity electromagnetic radiation noise, and a hot-line work site is provided with a plurality of precise instruments and intelligent equipment which can break down or even fail to work normally due to the electromagnetic radiation interference of the electric arc. Therefore, it is increasingly important to study the electromagnetic radiation characteristics of the arc in the potential transfer of the live working of the power transmission line.

Disclosure of Invention

The invention provides a simulation test platform for electromagnetic radiation characteristics of a potential transfer arc in live working of a power transmission line, which utilizes a power frequency test transformer to generate power frequency high voltage on a simulation lead, utilizes a potential transfer device to control a transfer electrode to move up and down, and simulates the process of entering equipotential in live working by moving the transfer electrode upwards to be close to the simulation lead; the transfer electrode moves downwards to be far away from the simulation lead, and the process of equipotential generation in live working is simulated; in the equipotential entering and exiting process, arc discharge phenomenon can be generated between the transfer electrode and the simulation lead, so that the electromagnetic radiation characteristic of the arc can be measured.

The technical scheme adopted by the invention is as follows:

a simulation test platform for electromagnetic radiation characteristics of a potential transfer arc in live working of a power transmission line comprises a voltage generation system, a potential transfer device and a measurement system,

the voltage generation system is used for generating high voltage and simulating the operating voltage of the power transmission line;

the potential transfer device is used for generating electric arcs between the simulation lead and the transfer electrode and simulating the potential transfer electric arcs;

the measuring system is used for measuring relevant physical quantities in the test process and displaying the waveform of each measuring signal.

The voltage generating system comprises a voltage regulator, a power frequency test transformer, a simulation lead and a voltage-equalizing ball, wherein the input voltage of the voltage regulator is power frequency voltage, the output end of the voltage regulator is connected with the input end of the power frequency test transformer, and the output end of the power frequency test transformer is connected with the simulation lead in series; and the two ends of the simulation lead are provided with voltage-sharing balls.

The potential transfer device is located one side of the voltage generation system and is reserved with an insulation distance, and the potential transfer device comprises:

the device comprises a stepping motor, a remote controller, a speed reducer, a coupling, a sliding seat, a ball screw, a base, a transfer rod and a transfer electrode; the reducer is connected with the stepping motor, the upper end of the coupler is connected with an output shaft of the stepping motor, the lower end of the coupler is connected with the upper end of the ball screw, the ball screw and the stepping motor rotate together to transmit torque, and the lower end of the ball screw is connected and fixed with the base.

The ball screw is provided with a sliding seat, the sliding seat is fixed with a transfer rod, the transfer rod is connected with a transfer electrode, and the stepping motor controls the ball screw to rotate, so that the sliding seat is driven to move up and down, and the sliding seat can drive the transfer rod to move up and down and is used for changing the distance between the transfer electrode and a simulation lead.

The up-and-down movement of the sliding seat is realized by controlling the forward and reverse rotation of the stepping motor through a remote controller.

The side face of the transfer rod is perforated, threads with corresponding sizes are machined at the end part of the transfer electrode, and the transfer electrode is connected with the transfer rod through thread matching so as to be convenient for replacing the transfer electrode.

The measurement system includes: the system comprises a biconical antenna, a ring antenna, a voltage divider, a coaxial shunt, a transmission optical fiber, a data acquisition card and a PC (personal computer); the coaxial shunt is connected in series between the power frequency test transformer and the simulation lead and is close to the simulation lead and used for measuring the potential transfer current; the high-voltage side of the voltage divider is connected between the power frequency test transformer and the simulation lead and used for measuring the voltage applied to the simulation lead; the biconical antenna and the annular antenna are positioned on one side of the test platform and are respectively used for measuring electric field radiation and magnetic field radiation; the coaxial shunt, the voltage divider, the biconical antenna and the annular antenna are connected with a data acquisition card through transmission optical fibers, and the data acquisition card is connected with a PC (personal computer) so as to display the waveform of each measurement signal.

The invention discloses a simulation test platform for electromagnetic radiation characteristics of a potential transfer arc in live working of a power transmission line, which has the following technical effects:

1. the test platform fully considers the basic principle of live working potential transfer, utilizes the fixed conducting wire to simulate an actual high-voltage transmission line, utilizes the transfer electrode capable of moving up and down to simulate the process of entering and exiting the equipotential of actual operating personnel, and is closer to the process of entering and exiting the equipotential of actual live working.

2. The test platform uses the stepping motor and the ball screw as the transmission device, the transfer distance is convenient to adjust, and the precision is higher.

3. The test platform can consider the influence of different factors such as voltage grade, the height of a lead to the ground, transfer distance, the type of a transfer electrode, radiation distance and the like on the electromagnetic radiation characteristic of the potential transfer arc.

4. The test platform can synchronously measure the magnitude of the potential transfer current and the information of the radiation electric field and the magnetic field of the transferred arc, and more accurately reflects the electromagnetic radiation characteristic of the potential transfer arc.

5. The test platform is simple to operate, safe, reliable, high in practicability and convenient to build.

Drawings

FIG. 1 is a schematic diagram of the connection of the test platform of the present invention.

FIG. 2 is a schematic diagram of the connection between the transfer rod and the transfer electrode of the test platform of the present invention.

Detailed Description

As shown in FIG. 1 and FIG. 2, a simulation test platform for electromagnetic radiation characteristics of potential transfer arc in live working of a power transmission line comprises a voltage generation system, a potential transfer device and a measurement system,

the voltage generation system is used for generating high voltage and simulating the operating voltage of the power transmission line;

the potential transfer device is used for generating an electric arc between the analog lead 13 and the transfer electrode 29 and simulating a potential transfer electric arc;

the measuring system is used for measuring relevant physical quantities in the test process and displaying the waveform of each measuring signal.

The voltage generating system comprises a voltage regulator 11, a power frequency test transformer 12, a simulation lead 13 and a voltage-equalizing ball 14, wherein the input voltage of the voltage regulator 11 is power frequency 220V, the output end of the voltage regulator 11 is connected with the input end of the power frequency test transformer 12, and the output end of the power frequency test transformer 12 is connected with the simulation lead 13 in series; the two ends of the simulation lead 13 are provided with the voltage-sharing balls 14, so that point discharge at the two ends of the simulation lead 13 is avoided. The power frequency test transformer 12 is a step-up transformer, and is used for increasing the 220V power frequency voltage to the required high voltage, so that a high potential is generated on the simulation lead 13, and power frequency test voltages with different sizes can be generated by adjusting the output voltage of the voltage regulator 11; the height of the analog conductor 13 to the ground can be adjusted as desired.

The potential transfer device is positioned on one side of the voltage generation system, and is reserved with an insulation distance to prevent the simulation lead 13 from discharging to the potential transfer device. The electric potential transfer device comprises a stepping motor 21, a remote controller 22, a speed reducer 23, a coupling 24, a sliding seat 25, a ball screw 26, a base 27, a transfer rod 28 and a transfer electrode 29.

The reducer 23 is connected with the stepping motor 21, the upper end of the coupler 24 is connected with an output shaft of the stepping motor 21, the lower end of the coupler 24 is connected with the upper end of the ball screw 26 to serve as a driven shaft, the ball screw 26 and the stepping motor 21 rotate together to transmit torque, and the effects of transmitting power, buffering and improving the dynamic performance of a shaft system are achieved.

The lower end of a ball screw 26 is fixedly connected with a base 27, the ball screw 26 is provided with a slide seat 25, the slide seat 25 is fixedly provided with a transfer rod 28, the transfer rod 28 is connected with a transfer electrode 29, the stepping motor 21 controls the ball screw 26 to rotate, so that the slide seat 25 is driven to move up and down, and the slide seat 25 can drive the transfer rod 28 to move up and down for changing the distance between the transfer electrode 29 and the simulation lead 13; the up-and-down movement of the slide carriage 25 is realized by controlling the forward and reverse rotation of the stepping motor 21 by the remote controller 22.

As shown in FIG. 2, the side of the transfer rod 28 is perforated, the end of the transfer electrode 29 is threaded with a corresponding size, the transfer electrode 29 is connected with the transfer rod 28 through threaded fit, and the transfer electrode 29 can be conveniently replaced through threaded fit. When the distance between the transfer electrode 29 and the analog lead 13 is small, the "arcing" phenomenon occurs during the process of approaching or moving away from the analog lead 13.

The measurement system includes: the antenna comprises a biconical antenna 31, a loop antenna 32, a voltage divider 33, a coaxial shunt 34, a transmission optical fiber 35, a data acquisition card 36 and a PC (personal computer) 37; the coaxial shunt 34 is connected in series between the power frequency test transformer 12 and the analog lead 13, is close to the analog lead 13, and is used for measuring potential transfer current; the high-voltage side of the voltage divider 33 is connected between the power frequency test transformer 12 and the simulation lead 13 and is used for measuring the voltage applied to the simulation lead 13; the biconical antenna 31 and the loop antenna 32 are positioned on one side of the test platform and are respectively used for measuring electric field radiation and magnetic field radiation; the coaxial shunt 34, the voltage divider 33, the biconical antenna 31 and the loop antenna 32 are all connected with a data acquisition card 36 through a transmission optical fiber 35, and the data acquisition card 36 is connected with a PC 37, so that the waveforms of all measurement signals are displayed.

A simulation test method for electromagnetic radiation characteristics of a potential transfer arc in live working of a power transmission line utilizes a power frequency test transformer 12 to generate power frequency high voltage on a simulation lead 13, utilizes a potential transfer device to control a transfer electrode 29 to move up and down, and utilizes the transfer electrode 29 to move upwards to be close to the simulation lead 13 to simulate the process of entering equipotential in live working; the process of equipotential generation in live working is simulated by moving the transfer electrode 29 downwards and away from the simulation lead 13; in the process of entering and exiting equipotential, an arc discharge phenomenon is generated between the transfer electrode 29 and the simulation lead 13, so that the electromagnetic radiation characteristic of the arc can be measured.