Overhead line galloping excitation test method and related device

Abstract

The invention relates to an overhead line galloping excitation test method and a related device. The method comprises the following steps: determining galloping parameters for simulating conductor galloping required by a test; configuring a driving unit according to the galloping parameter, and obtaining a position parameter of the driving unit; determining the time delay of each driving unit according to the galloping parameters; setting a running track of each driving unit according to the galloping parameters and the position parameters of the driving units; setting a control instruction in the PC according to the time delay and the running track of each driving unit; controlling the driving unit to carry out a galloping test according to the control instruction; and reading the data of the driving unit in the experiment, and fitting to obtain the three-dimensional motion trail of the power transmission conductor. Through combined control of a plurality of driving units arranged along a first-gear wire, standing waves with one, two or three antinodes are formed in the first-gear wire, so that simulation of a multi-order galloping process is realized.

Description

Technical Field

[0001] The invention belongs to the field of electrical equipment, and in particular relates to an overhead line galloping excitation test method and a related device. Background Art

[0002] The transmission lines after ice cover produce a low-frequency, large-amplitude self-excited vibration under continuous wind excitation. Its shape is like a dragon dance, which is called the dancing phenomenon. The dancing frequency is usually 0.1-3Hz, and the amplitude is about 5-300 times the diameter of the conductor and ±0.1-±1 times the verticality of the span. Once the conductor dancing is formed, it can generally last for several hours, usually causing conductor breakage, hardware wear, tower toppling, etc., causing great damage to the transmission line, and is one of the important chronic diseases that threaten the safe operation of the transmission line. Therefore, the prevention and control of line dancing is of great significance to the disaster prevention and mitigation of the power grid and the provision of power system reliability.

[0003] Due to the large geometric size, high voltage level, long power outage period and great pressure of safety control of real transmission lines, it is difficult to carry out research related to the dancing of real lines. Therefore, scholars at home and abroad usually use the method of applying excitation on the line model to simulate the dancing process of the conductor. At present, the main methods of exciting the dancing on the simulated transmission line include mechanical excitation, wind excitation, electromagnetic excitation, etc. The main technical idea is to apply vertical or horizontal excitation at a single point on the conductor to make the conductor self-excited.

[0004] When a real wire dances, the wire's trajectory in space is very complex. In the direction along the wire, a standing wave or traveling wave with one, two or three antinodes is formed in a wire, which is called first-order, second-order and third-order dancing; in the direction perpendicular to the wire, the wire mainly moves vertically in the vertical plane, and sometimes also moves elliptically.

[0005] At present, the main methods for stimulating dancing on simulated transmission lines include mechanical excitation, wind excitation, electromagnetic excitation, etc. The main technical idea is to apply vertical or horizontal excitation at a single point on the conductor to make the conductor self-excited. Patent CN202582715U discloses a device for simulating the dancing of ice-covered conductors composed of springs, connecting rods, etc., which can simulate the dancing of ice-covered conductors with multiple degrees of freedom, and can also simulate the effects of different cross-sectional shapes and different angles of attack on the dancing. Patent CN117969010 A discloses a method of using a traction drive device to excite the in-plane movement of the conductor, and by changing the amplitude of the longitudinal excitation device, the dancing simulation under different wind fields and wind speed fields is achieved. Patent CN206905880U uses a winch to connect the tail end conductor part, and drives the excitation conductor part to reciprocate through the motor power system, so that the dancing conductor part undergoes dancing oscillation, thereby simulating the actual dancing of the conductor in the conductor-tower system. Patent CN214748756U discloses a test system that uses a high-power fan to blow the wire to simulate the dancing of the wire, which has the advantage of simple structure. Patent CN114812995A discloses a dancing machine including a horizontal reciprocating motor, a longitudinal reciprocating motor, a frequency-modulating speed regulator and a voltage-modulating speed regulator, which simulates different dancing frequencies and amplitudes by acting on the simulated wire through the dancing machine.

[0006] However, the existing dancing excitation devices disclosed above have a relatively complex structure and low control accuracy. They are mostly used to simulate a simple dancing mode of a single standing wave (first-order dancing) and vertical motion within one gear, but cannot accurately simulate a complex dancing mode of multiple standing waves (multi-order dancing) and elliptical motion. Therefore, it is urgent to develop a scaled overhead line dancing excitation system with a simple structure, high control accuracy and large control freedom to meet the experimental needs of generating various complex dancing processes. Summary of the invention

[0007] The purpose of the present invention is to solve the above-mentioned deficiencies of the prior art, thereby providing an overhead line galloping excitation test method and related devices. By jointly controlling multiple drive units arranged along a conductor, a standing wave with one, two or three antinodes is formed in the conductor, thereby realizing the simulation of a multi-order galloping process.

[0008] An overhead line galloping excitation test method comprises the following steps:

[0009] Determine the dancing parameters needed to simulate the conductor dancing in the experiment;

[0010] Configure the drive unit according to the dancing parameters and obtain the position parameters of the drive unit;

[0011] Determine the time delay of each driving unit according to the dancing parameters;

[0012] Set the running track of each drive unit according to the dancing parameters and the drive unit position parameters;

[0013] Set control instructions in the PC according to the time delay and the running trajectory of each drive unit;

[0014] Control the drive unit to perform dancing test according to the control instructions;

[0015] The driving unit data in the experiment is read and the three-dimensional motion trajectory of the transmission line is obtained by fitting.

[0016] The dancing parameters include the dancing order n, the conductor dancing frequency f and the conductor lowest point dancing amplitude D.

[0017] Configure the drive unit according to the dancing parameters and obtain the drive unit position parameters, specifically:

[0018] The gear spacing L of the test gear is measured, and a set of driver units are installed at L / (2n), 2L / (2n), 3L / (2n)...(2n-1)L / (2n) respectively. The total number of driver units is 2n-1, and the dancing order is n. L is the gear spacing of the test gear.

[0019] Fix the transmission wires on each drive unit through the buckle, and measure the height of the drive unit hanging point from the ground, which are recorded as h1, h2, h3...h 2n-1 .

[0020] Determine the delay of each drive unit according to the dancing parameters, specifically:

[0021] Determine the delay setting of each drive unit according to the order n and dancing frequency f of the simulated wire dancing required by the experiment:

[0022] If the first-order dancing is simulated, that is, n = 1, there is no need to set the delay;

[0023] If multi-stage dancing is simulated, that is, n>1, set the delay t of the i-th drive unit relative to the first drive unit i , i>2:

[0024]

[0025] Set the running track of each drive unit according to the dancing parameters and drive unit position parameters, specifically:

[0026] According to the test requirements, simulate the wire's lowest point dancing amplitude D and the drive unit position, and calculate the amplitude d required for each drive unit to drive the wire to move. i :

[0027]

[0028] Where h0 is the vertical height of the wire hanging point on the hanging tower, min(h1,h2,...,h 2n-1 ) is the minimum vertical height of the wire hanging point on each driver;

[0029] According to the amplitude d i Set the top hanging point positions of the telescopic rods of the two sets of reciprocating actuators in each drive unit.

[0030] According to the amplitude d i Set the position of the top of the telescopic rod of the two sets of reciprocating actuators in each drive unit, specifically:

[0031] When the transmission line dances in the vertical direction, the coordinates (x, y) of the transmission line hanging point change with time as follows:

[0032] x i (t) = 0

[0033]

[0034] The corresponding motion control equations of the two reciprocating brakes in the i-th drive unit are:

[0035]

[0036] Among them, L i1 (t), L i2 (t) is the total length of the two reciprocating actuators in each i-th drive unit at time t, and L0 is the length of the electric cylinder of the reciprocating actuator;

[0037] When the transmission line dances in the horizontal direction, the coordinates (x, y) of the transmission line hanging point change with time as follows:

[0038]

[0039] y i (t) = h i

[0040] The corresponding control equations of the two reciprocating brakes in the i-th drive unit are:

[0041]

[0042] Among them, L i1 (t), L i2 (t) is the total length of the two reciprocating actuators in each i-th drive unit at time t, and L0 is the length of the electric cylinder of the reciprocating actuator;

[0043] When the transmission line moves in a circle or ellipse, the coordinates (x, y) of the hanging point of the transmission line change with time as follows:

[0044]

[0045] The two reciprocating brake control equations in the corresponding i-th driving unit are respectively:

[0046]

[0047] Wherein, di’ is the minor axis of the elliptical motion of the driving wire of the i-th control unit, and di’ < di is taken; if it is a circular motion, di’ = di is taken.

[0048] Read the data of the driving unit in the experiment, and fit to obtain the three-dimensional motion trajectory of the transmission wire, specifically:

[0049] Taking the vertical projection of one end of the transmission wire as the original coordinate, a three-dimensional rectangular coordinate system is established along the direction of the transmission wire;

[0050] Read the running time t of each driving unit, and read the vertical plane coordinates (x i , y i ) of the wire hanging point corresponding to the i-th driving unit at the moment of t, and read the position of the i-th driving unit from the hanging tower (2i - 1)L / (2n), and combine to obtain the three-dimensional coordinates of the wire hanging point [x i , y i , (2i - 1)L / (2n)];

[0051] By fitting the three-dimensional coordinates of the i wire hanging points in space, the analytical expression of the spatial position of the transmission wire at the moment of t is obtained.

[0052] An overhead line galloping excitation test system, comprising:

[0053] A galloping parameter determination module, which is used to determine the galloping parameters for simulating the galloping of the wire in the test;

[0054] A position parameter acquisition module, which is used to configure the driving unit according to the galloping parameters and acquire the position parameters of the driving unit;

[0055] A time delay determination module, which is used to determine the time delay of each driving unit according to the galloping parameters;

[0056] An operation trajectory setting module, which is used to set the operation trajectories of each driving unit according to the galloping parameters and the position parameters of the driving unit;

[0057] A control instruction setting module, which is used to set control instructions in the PC computer according to the time delay and the operation trajectories of each driving unit;

[0058] A control module, which is used to control the driving unit to perform a galloping test according to the control instructions;

[0059] The trajectory fitting module is used to read the driving unit data in the experiment and obtain the three-dimensional motion trajectory of the transmission line by fitting.

[0060] The position parameter acquisition module is specifically used for:

[0061] The gear spacing L of the test gear is measured, and a set of driver units are installed at L / (2n), 2L / (2n), 3L / (2n)...(2n-1)L / (2n) respectively. The total number of driver units is 2n-1, and the dancing order is n. L is the gear spacing of the test gear.

[0062] The transmission wire (1) is fixed to each drive unit through a buckle, and the height of the drive unit hanging point from the ground is measured and recorded as h1, h2, h3...h 2n-1 .

[0063] The delay determination module is specifically used for:

[0064] Determine the delay setting of each drive unit according to the order n and dancing frequency f of the simulated wire dancing required by the experiment:

[0065] If the first-order dancing is simulated, that is, n = 1, there is no need to set the delay;

[0066] If multi-stage dancing is simulated, that is, n>1, set the delay t of the i-th drive unit relative to the first drive unit i , i>2:

[0067]

[0068] The running track setting module is specifically used for:

[0069] According to the test requirements, simulate the wire's lowest point dancing amplitude D and the drive unit position, and calculate the amplitude d required for each drive unit to drive the wire to move. i :

[0070]

[0071] Where h0 is the vertical height of the wire hanging point on the hanging tower, min(h1,h2,...,h 2n-1 ) is the minimum vertical height of the wire hanging point on each driver;

[0072] According to the amplitude d i Set the top hanging point positions of the telescopic rods of the two sets of reciprocating actuators in each drive unit.

[0073] The trajectory fitting module is specifically used for:

[0074] Taking the vertical projection of one end of the transmission line as the original coordinate, a three-dimensional rectangular coordinate system is established along the direction of the transmission line;

[0075] Read the running time t of each drive unit, and read the vertical plane coordinates (x i ,y i ), read the position of the ith drive unit from the hanging tower (2i-1)L / (2n), and combine to get the three-dimensional coordinates of the wire hanging point [x i ,y i ,(2i-1)L / (2n)];

[0076] By fitting the spatial three-dimensional coordinates of i conductor hanging points, the analytical expression of the spatial position of the transmission line at time t is obtained.

[0077] An electronic device includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the overhead line dancing excitation simulation test method described in any one of the above schemes is implemented.

[0078] A non-transitory computer-readable storage medium stores a computer program, which, when executed by a processor, implements the overhead line galloping excitation simulation test method described in any one of the above-mentioned schemes.

[0079] An overhead line dancing excitation test device, characterized in that it comprises:

[0080] A wire hanging assembly, the wire hanging assembly is used to hang the power transmission wire to be tested;

[0081] At least one driving unit, the driving unit is used to drive the transmission wire to reciprocate so that the transmission wire oscillates in a dancing manner, each of the driving units is arranged in a linear array below the transmission wire, and the top of the driving unit is connected to the transmission wire;

[0082] Motion control board and PC computer, the motion control board and PC computer are connected with the drive unit via control cables;

[0083] The motion control board is used to control the drive unit to perform corresponding actions according to the control instructions issued by the PC;

[0084] The motion control board is also used to read the top position of the drive unit and feed it back to the PC;

[0085] The PC computer (5) is used to correct the control instructions according to the feedback information of the motion control board (4) to perform closed-loop control.

[0086] The hanging wire components are at least two groups and are respectively arranged on the two ends of the transmission wire.

[0087] The hanging wire assembly comprises a hanging wire tower and at least one hanging wire insulator, one end of the hanging wire insulator is connected to the hanging wire tower, the hanging wire tower is fixed on the horizontal ground, one end of the hanging wire insulator is fixed on the hanging wire tower, and the other end is connected to the transmission wire.

[0088] The driving unit includes two reciprocating actuators, a base plate, a ring buckle and a driver. The bottom of the cylinder body of the two reciprocating actuators is fixed to the base plate by a hinge, the top of the telescopic rod of the two reciprocating actuators is fixed to the ring buckle by a hinge, the transmission wire is passed through the ring buckle, one end of the driver is connected to the two reciprocating actuators, and the other end is connected to the motion control board. The motion control board controls the movement of the two reciprocating actuators through the driver, drives the ring buckle to move, and then moves the transmission wire under the drive of the ring buckle.

[0089] The motion control board reads the absolute encoder data of the reciprocating actuator in real time and feeds it back to the PC. The PC corrects the command based on the feedback data to achieve closed-loop control of the top position of the telescopic rod of the reciprocating actuator. The absolute encoder data of the reciprocating actuator is stored in the driver.

[0090] The present invention has the following beneficial effects. 1. The cylinder bodies of the two reciprocating actuators of the driving unit are fixed to the base plate by hinges, and the telescopic rods of the two reciprocating actuators are fixed to the ring buckles by hinges. The power transmission wires pass through the ring buckles and move under the drive of the ring buckles. By precisely controlling the parallel reciprocating actuators, various types of wire motion trajectories such as vertical, horizontal, circular, and elliptical can be achieved. 2. By jointly controlling multiple driving units arranged along a single-stage wire, standing waves with one, two, or three antinodes are formed in the single-stage wire, thereby realizing the simulation of the first, second, and third-order dancing processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0091] Figure 1 It is a structural diagram of the dancing incentive device of the present invention;

[0092] Figure 2 It is a layout diagram of the driving unit of the dancing excitation device of the present invention;

[0093] Figure 3 This is a structural diagram of a driving unit of a dancing excitation device of the present invention;

[0094] Figure 4 The present invention is a flow chart of the conductor dancing test method. DETAILED DESCRIPTION

[0095] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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.

[0096] like Figure 1-2 As shown, the overhead line dancing excitation device of the present invention includes a hanging line assembly consisting of a hanging line tower 3 and a hanging line insulator 6, a transmission line 1, a plurality of drive units 2, a motion control board 4 and a PC 5. There are at least two hanging line towers 3, and a plurality of phase transmission lines 1 can be suspended from both ends. One end of the hanging line insulator 6 is connected to the hanging line tower 3, and the hanging line tower 3 is fixed on the horizontal ground. One end of the hanging line insulator 6 is fixed on the hanging line tower 3, and the other end is connected to the transmission line 1. The drive unit 2 is used to drive the transmission line 1 to reciprocate so that the transmission line 1 undergoes dancing oscillation. A plurality of drive units 2 are arranged below the line to form a linear array. The top of the drive unit 2 is connected to the transmission line 1, and the hanging line tower 3 and the drive unit 2 are both fixed on the horizontal ground. The motion control board 4, the PC 5 and the drive unit 2 are connected via a control cable; the motion control board 4 is used to control the drive unit 2 to perform corresponding actions according to the control instructions issued by the PC 5; the motion control board 4 is also used to read the top position of the drive unit 2 and feed it back to the PC 5, and the PC 5 is used to correct the control instructions according to the feedback information of the motion control board 4 to perform closed-loop control.

[0097] The hanging tower 3 is made of angle steel, including tower legs, tower body and cross arm structure. The tower legs are fixed to the ground by bolts, and the cross arm structure has three hooks connected to the hanging insulators. The other end of the hanging insulator is connected to the transmission line 1. Two adjacent hanging towers form a complete three-phase line through six hanging insulators and three transmission lines. There are flexible hanging rings wound with steel wire at both ends of the hanging insulator 6, one end of which is connected to the cross arm structure of the hanging tower 3, and the other end is connected to the transmission line 1.

[0098] like Figure 3As shown, the drive unit includes two reciprocating actuators 7, a base plate 8, a ring buckle 9 and a driver 10. The bottom of the cylinder of the two reciprocating actuators 7 is fixed to the base plate by a hinge, the top of the telescopic rod of the two reciprocating actuators 7 is fixed to the ring buckle 9 by a hinge, and the power transmission wire 1 is inserted into the ring buckle 9. One end of the driver 10 is connected to the two reciprocating actuators, and the other end is connected to the motion control board 4. The motion control board 4 controls the movement of the two reciprocating actuators 7 through the driver 10, drives the ring buckle 9 to move, and then drives the power transmission wire 1 to move under the drive of the ring buckle 9. The motion control board 4 reads the absolute encoder data of the reciprocating actuator in real time and feeds it back to the PC 5. The PC 5 performs instruction correction according to the feedback data to realize closed-loop control of the top position of the telescopic rod of the reciprocating actuator. The absolute encoder data of the reciprocating actuator is stored in the driver 10.

[0099] like Figure 4 The present invention relates to an overhead line galloping excitation test method, comprising the following steps:

[0100] Step S1, determining the wire dancing order n, wire dancing frequency f, and wire lowest point dancing amplitude D required for simulating the test.

[0101] Step S2, configuring the driving unit according to the dancing parameters, and obtaining the position parameters of the driving unit.

[0102] Measure the span L of the test gear (the horizontal distance between two adjacent hanging towers), install the drive units at L / (2n), 2L / (2n), 3L / (2n)...(2n-1)L / (2n) respectively, the total number of drive units is 2n-1 sets, the drive unit is installed directly below the transmission line and should be in the same vertical plane as the transmission line, fix the transmission line to the drive unit through a buckle, measure the height of the drive unit hanging point from the ground, record them as h1, h2, h3...h 2n-1 .

[0103] Step S3, according to the experimental requirements, the order n and the dancing frequency f of the simulated wire dancing are determined to set the delay of each driving unit:

[0104] If first-order dancing is simulated, that is, n=1, since only one set of driver units is needed, there is no need to set the delay.

[0105] If multi-stage dancing is simulated, that is, n>1, it is necessary to set the delay ti of the i-th (i>2) drive unit relative to the first drive unit:

[0106]

[0107] Step S4, setting the running trajectory of each driving unit according to the dancing parameters and the driving unit position parameters;

[0108] Step S4.1, simulating the dancing amplitude D of the lowest point of the wire and the position of the driving unit according to the test requirements, and calculating the amplitude di of each driving unit required to drive the wire to move.

[0109]

[0110] Where h0 is the vertical height of the conductor hanging point on the hanging tower, and min(h1,h2,...,h2n-1) is the minimum value of the vertical height of the conductor hanging point on each driver;

[0111] Step S4.2: According to the amplitude d i Set the top hanging point positions of the two sets of reciprocating actuator telescopic rods in each drive unit, specifically:

[0112] Step S4.2.1: If the wire is expected to dance in the vertical direction, the coordinates (x, y) of the wire hanging point change with time as follows:

[0113] x i (t) = 0

[0114] y i (t) = d i |sin(i / 2·π)|sin(2πft)+h i

[0115] The corresponding control equations of reciprocating brakes No. 1 and No. 2 in the i-th drive unit are:

[0116]

[0117] Among them, Li1(t) and Li2(t) are the total lengths of reciprocating actuators No. 1 and No. 2 in each drive unit No. ith at time t, and L0 is the length of the electric cylinder of the compound actuator.

[0118] Step S4.2.2: If the wire is expected to dance in the horizontal direction, the coordinates (x, y) of the wire hanging point change with time as follows:

[0119]

[0120] y i (t) = h i

[0121] The corresponding control equations of reciprocating brakes No. 1 and No. 2 in the i-th drive unit are:

[0122]

[0123] Wherein, Li1(t) and Li2(t) are respectively the total lengths of the reciprocating actuators No. 1 and No. 2 in the ith driving unit at time t, and L0 is the length of the electric cylinder of the compound actuator.

[0124] Step S4.2.3, if it is desired that the wire makes a circular or elliptical motion, the coordinates (x, y) of the wire hanging point change with time as follows:

[0125] x i (t) = d′ i |sin(i / 2·π)|sin(2πft)

[0126] y i (t) = h i +d i |sin(i / 2·π)|cos(2πft)

[0127] The control equations of the reciprocating brakes No. 1 and No. 2 in the corresponding ith driving unit are respectively:

[0128]

[0129] In the formula, di’ is the minor axis of the ellipse formed by the wire driven by the ith control unit, and di’ < di is taken; if it makes a circular motion, di’ = di is taken.

[0130] Step S5, set the control instructions in the PC computer according to the time delay and the running trajectories of each driving unit;

[0131] Step S6, control the driving unit to perform the galloping test according to the control instructions;

[0132] Step S7, read the data of the driving unit and fit to obtain the three-dimensional motion trajectory of the whole-section wire, specifically:

[0133] Take the vertical projection of one end of the transmission wire as the original coordinate, and establish a three-dimensional rectangular coordinate system along the direction of the transmission wire;

[0134] Read the running time t of each driving unit, read the vertical plane coordinates (xi, yi) of the wire hanging point corresponding to the ith driving unit at time t, and read the position of the ith driving unit from the hanging tower (2i - 1)L / (2n), and combine to obtain the wire hanging point in the three-dimensional coordinates [xi, yi, (2i - 1)L / (2n)];

[0135] By fitting the three-dimensional spatial coordinates of i wire hanging points, the analytical expression of the spatial position of the transmission wire at time t is obtained.

[0136] On the other hand, the present invention provides an overhead line galloping excitation test system, including:

[0137] A dancing parameter determination module, the dancing parameter determination module is used to determine the dancing parameters required for simulating the dancing of the wire in the experiment;

[0138] A position parameter acquisition module, the position parameter acquisition module is used to configure the driving unit according to the dancing parameters and obtain the position parameters of the driving unit;

[0139] A time delay determination module, the determination module is used to determine the time delay of each driving unit according to the dancing parameters;

[0140] An operation trajectory setting module, wherein the operation trajectory determination module is used to set the operation trajectory of each drive unit according to the dancing parameters and the drive unit position parameters;

[0141] A control instruction setting module, which is used to set control instructions in a PC according to the time delay and the running trajectory of each drive unit;

[0142] A control module, the control module is used to control the drive unit to perform a dancing test according to a control instruction;

[0143] The trajectory fitting module is used to read the driving unit data in the experiment and obtain the three-dimensional motion trajectory of the transmission line by fitting.

[0144] The position parameter acquisition module is specifically used for:

[0145] The gear spacing L of the test gear is measured, and a set of driver units are installed at L / (2n), 2L / (2n), 3L / (2n)...(2n-1)L / (2n) respectively. The total number of driver units is 2n-1, and the dancing order is n. L is the gear spacing of the test gear.

[0146] The transmission wire (1) is fixed to each drive unit through a buckle, and the height of the drive unit hanging point from the ground is measured and recorded as h1, h2, h3...h 2n-1 .

[0147] 10. An overhead line galloping excitation test system according to claim 8, characterized in that the delay determination module is specifically used for:

[0148] Determine the delay setting of each drive unit according to the order n and dancing frequency f of the simulated wire dancing required by the experiment:

[0149] If the first-order dancing is simulated, that is, n = 1, there is no need to set the delay;

[0150] If multi-stage dancing is simulated, that is, n>1, set the delay t of the i-th drive unit relative to the first drive unit i , i>2:

[0151]

[0152] The running track setting module is specifically used for:

[0153] According to the test requirements, simulate the wire's lowest point dancing amplitude D and the drive unit position, and calculate the amplitude d required for each drive unit to drive the wire to move. i :

[0154]

[0155] Where h0 is the vertical height of the wire hanging point on the hanging tower, min(h1,h2,...,h 2n-1 ) is the minimum vertical height of the wire hanging point on each driver;

[0156] According to the amplitude d i Set the top hanging point positions of the telescopic rods of the two sets of reciprocating actuators in each drive unit.

[0157] The trajectory fitting module is specifically used for:

[0158] Taking the vertical projection of one end of the transmission line as the original coordinate, a three-dimensional rectangular coordinate system is established along the direction of the transmission line;

[0159] Read the running time t of each drive unit, and read the vertical plane coordinates (x i ,y i ), read the position of the ith drive unit from the hanging tower (2i-1)L / (2n), and combine to get the three-dimensional coordinates of the wire hanging point [x i ,y i ,(2i-1)L / (2n)];

[0160] By fitting the spatial three-dimensional coordinates of i conductor hanging points, the analytical expression of the spatial position of the transmission line at time t is obtained.

[0161] Another aspect of the present invention provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the overhead line dancing excitation simulation test method described in any one of the above schemes is implemented.

[0162] Another aspect of the present invention provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the overhead line galloping excitation simulation test method described in any one of the above-mentioned schemes.

[0163] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0164] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0165] These computer program instructions may also be stored in a computer readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0166] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0167] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. An overhead line galloping excitation test method, characterized in that: It includes the following steps: Determine the galloping parameters for simulating conductor galloping in the test; Configure the driving unit according to the galloping parameters and obtain the position parameters of the driving unit; Determine the time delay of each driving unit according to the galloping parameters; Set the running trajectories of each driving unit according to the galloping parameters and the position parameters of the driving unit; Set control instructions in the PC according to the time delay and the running trajectories of each driving unit; Control the driving unit to conduct a galloping test according to the control instructions; Read the data of the driving unit in the experiment and obtain the three-dimensional motion trajectory of the transmission conductor by fitting; 2. An overhead line galloping excitation test method according to claim 1, characterized in that: The galloping parameters include the galloping order n, the conductor galloping frequency f, and the galloping amplitude D at the lowest point of the conductor; 3. The overhead line galloping excitation test method according to claim 1, characterized in that: Configure the driving unit according to the galloping parameters and obtain the position parameters of the driving unit. Specifically: Measure the span L of the experimental section, and install a set of driving units at L / (2n), 2L / (2n), 3L / (2n)...(2n - 1)L / (2n) respectively. The total number of driving units is 2n - 1, where n is the galloping order and L is the span of the experimental section; The transmission wire (1) is fixed to each drive unit through a buckle, and the height of the drive unit hanging point from the ground is measured and recorded as h1, h2, h3...h 2n-1 .

4. The overhead line galloping excitation test method according to claim 1, characterized in that: Determine the time delay of each driving unit according to the galloping parameters. Specifically: Determine the time delay setting of each driving unit according to the galloping order n and the galloping frequency f required to simulate conductor galloping in the test: If simulating first-order galloping, i.e., n = 1, no time delay needs to be set; If multi-stage dancing is simulated, that is, n>1, set the delay t of the i-th drive unit relative to the first drive unit i , i>2:

5. The overhead line galloping excitation test method according to claim 1, characterized in that: Set the running trajectories of each driving unit according to the galloping parameters and the position parameters of the driving unit. Specifically: According to the test requirements, simulate the wire's lowest point dancing amplitude D and the drive unit position, and calculate the amplitude d required for each drive unit to drive the wire to move. i : Where h0 is the vertical height of the wire hanging point on the hanging tower, min(h1,h2,...,h 2n-1 ) is the minimum vertical height of the wire hanging point on each driver; According to the amplitude d i Set the top hanging point positions of the telescopic rods of the two sets of reciprocating actuators in each drive unit.

6. An overhead line galloping excitation test method according to claim 5, characterized in that: According to the amplitude d i Set the position of the top of the telescopic rod of the two sets of reciprocating actuators in each drive unit, specifically: When the transmission conductor gallops in the vertical direction, the coordinates (x, y) of the conductor suspension point change with time as: x i (t)=0 The motion control equations of the two reciprocating brakes in the corresponding i-th driving unit are: Among them, L i1 (t), L i2 (t) is the total length of the two reciprocating actuators in each i-th drive unit at time t, and L0 is the length of the electric cylinder of the reciprocating actuator; When the transmission conductor gallops in the horizontal direction, the coordinates (x, y) of the conductor suspension point change with time as: y i (t)=h i The control equations of the two reciprocating brakes in the corresponding i-th driving unit are respectively: Among them, L i1 (t), L i2 (t) is the total length of the two reciprocating actuators in each i-th drive unit at time t, and L0 is the length of the electric cylinder of the reciprocating actuator; When the transmission conductor moves in a circular or elliptical motion, the coordinates (x, y) of the conductor suspension point change with time as: The control equations of the two reciprocating brakes in the corresponding i-th driving unit are respectively: In the formula, di’ is the minor axis of the ellipse formed by the i-th control unit driving the conductor to move in an elliptical motion, and di’ < di; if moving in a circular motion, take di’ = di.

7. The overhead line galloping excitation test method according to claim 1, characterized in that: Read the data of the driving unit in the experiment and obtain the three-dimensional motion trajectory of the transmission conductor by fitting. Specifically: Take the vertical projection of one end of the transmission conductor as the original coordinate and establish a three-dimensional rectangular coordinate system along the direction of the transmission conductor; Read the running time t of each drive unit, and read the vertical plane coordinates (x i ,y i ), read the position of the ith drive unit from the hanging tower (2i-1)L / (2n), and combine to get the three-dimensional coordinates of the wire hanging point [x i ,y i ,(2i-1)L / (2n)]; Obtain the analytical expression of the spatial position of the transmission conductor at time t by fitting the three-dimensional spatial coordinates of i conductor suspension points.

8. An overhead line galloping excitation test system, characterized in that: It includes: A galloping parameter determination module, which is used to determine the galloping parameters for simulating conductor galloping in the test; A position parameter acquisition module, which is used to configure the driving unit according to the galloping parameters and obtain the position parameters of the driving unit; A time delay determination module, which is used to determine the time delay of each driving unit according to the galloping parameters; A running trajectory setting module, which is used to set the running trajectories of each driving unit according to the galloping parameters and the position parameters of the driving unit; A control instruction setting module, which is used to set control instructions in the PC according to the time delay and the running trajectories of each driving unit; A control module, the control module is used to control the drive unit to perform a dancing test according to a control instruction; The trajectory fitting module is used to read the driving unit data in the experiment and obtain the three-dimensional motion trajectory of the transmission line by fitting.

9. An overhead line galloping excitation test system according to claim 8, characterized in that: The position parameter acquisition module is specifically used for: The gear spacing L of the test gear is measured, and a set of driver units are installed at L / (2n), 2L / (2n), 3L / (2n)...(2n-1)L / (2n) respectively. The total number of driver units is 2n-1, and the dancing order is n. L is the gear spacing of the test gear. The transmission wire (1) is fixed to each drive unit through a buckle, and the height of the drive unit hanging point from the ground is measured and recorded as h1, h2, h3...h 2n-1 .

10. An overhead line galloping excitation test system according to claim 8, characterized in that: The delay determination module is specifically used for: Determine the delay setting of each drive unit according to the order n and dancing frequency f of the simulated wire dancing required by the experiment: If the first-order dancing is simulated, that is, n = 1, there is no need to set the delay; If multi-stage dancing is simulated, that is, n>1, set the delay t of the i-th drive unit relative to the first drive unit i , i>2:

11. The overhead line galloping excitation test system according to claim 8, characterized in that: The running track setting module is specifically used for: According to the test requirements, simulate the wire's lowest point dancing amplitude D and the drive unit position, and calculate the amplitude d required for each drive unit to drive the wire to move. i : Where h0 is the vertical height of the wire hanging point on the hanging tower, min(h1,h2,...,h 2n-1 ) is the minimum vertical height of the wire hanging point on each driver; According to the amplitude d i Set the top hanging point positions of the telescopic rods of the two sets of reciprocating actuators in each drive unit.

12. An overhead line galloping excitation test system according to claim 8, characterized in that: The trajectory fitting module is specifically used for: Taking the vertical projection of one end of the transmission line as the original coordinate, a three-dimensional rectangular coordinate system is established along the direction of the transmission line; Read the running time t of each drive unit, and read the vertical plane coordinates (x i ,y i ), read the position of the ith drive unit from the hanging tower (2i-1)L / (2n), and combine to get the three-dimensional coordinates of the wire hanging point [x i ,y i ,(2i-1)L / (2n)]; By fitting the spatial three-dimensional coordinates of i conductor hanging points, the analytical expression of the spatial position of the transmission line at time t is obtained.

13. An electronic device, characterized in that: The invention comprises a memory, a processor and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the overhead line dancing excitation test method as described in any one of claims 1 to 9 is implemented.

14. A non-transitory computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the overhead line galloping excitation test method according to any one of claims 1 to 9 is implemented.

15. An overhead line galloping excitation test device, characterized in that: include: A wire hanging assembly, the wire hanging assembly being used to hang a power transmission wire (1) to be tested; At least one driving unit (2), the driving unit (2) being used to drive the power transmission line (1) to perform reciprocating motion so as to cause the power transmission line (1) to oscillate in a dancing manner, the driving units (2) being arranged in a linear array below the power transmission line (1), the top end of the driving unit (2) being connected to the power transmission line (1) to be tested; A motion control board (4) and a PC (5), wherein the motion control board (4), the PC (5) and the drive unit (2) are connected via a control cable; The motion control board (4) is used to control the drive unit (2) to perform corresponding actions according to the control instructions issued by the PC (5); The motion control board (4) is also used to read the top position of the drive unit (2) and feed it back to the PC (5); The PC computer (5) is used to correct the control instructions according to the feedback information of the motion control board (4) to perform closed-loop control.

16. An overhead line galloping excitation test device according to claim 15, characterized in that: The hanging wire components are at least two groups and are arranged on the two ends of the power transmission wire (1).

17. An overhead line galloping excitation test device according to claim 15 or 16, characterized in that: The hanging wire assembly comprises a hanging wire tower (3) and at least one hanging wire insulator (6), one end of the hanging wire insulator (6) is connected to the hanging wire tower (3), the hanging wire tower (3) is fixed on the horizontal ground, one end of the hanging wire insulator (6) is fixed on the hanging wire tower (3), and the other end is connected to the transmission wire (1).

18. An overhead line galloping excitation test device according to claim 15, characterized in that: The drive unit comprises two reciprocating actuators (7), a base plate (8), a ring buckle (9) and a driver (10); the bottom of the cylinder of the two reciprocating actuators (7) is fixed to the base plate by a hinge; the top of the telescopic rod of the two reciprocating actuators (7) is fixed to the ring buckle (9) by a hinge; the power transmission wire (1) is inserted into the ring buckle (9); one end of the driver (10) is connected to the two reciprocating actuators, and the other end is connected to the motion control board (4); the motion control board (4) controls the movement of the two reciprocating actuators (7) through the driver (10), drives the ring buckle (9) to move, and then drives the power transmission wire (1) to move under the drive of the ring buckle (9).

19. An overhead line galloping excitation test device according to claim 18, characterized in that: The motion control board (4) reads the absolute encoder data of the reciprocating actuator in real time and feeds back the data to the PC (5). The PC (5) corrects the command according to the fed-back data to achieve closed-loop control of the top position of the telescopic rod of the reciprocating actuator. The absolute encoder data of the reciprocating actuator is stored in the driver (10).

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