CN108957051A - Portable field change of current valve tester - Google Patents

Abstract

The portable on-site converter valve tester includes a converter valve tester, a tester base plate is provided under the converter valve tester, the tester base plate is rectangular, and there are A rectangular sliding sleeve, the rectangular sliding sleeve is arranged along the length direction of the bottom plate of the tester, each rectangular sliding sleeve is connected to the bottom plate of the tester through a hinge shaft, each hinge shaft is provided with a torsion spring, and the torsion spring makes its corresponding rectangular slide The cover has a tendency to rotate outwards all the time, and each rectangular sliding sleeve is provided with a rectangular sliding plate that can slide up and down inside it. The top of the rectangular sliding plate is provided with a positioning block, and the positioning block can fall to the top of the rectangular sliding sleeve. The positive effect of the present invention is that it will not be accidentally opened due to shaking and the like when it is transported into the engineering vehicle, and the safety of the operator is guaranteed while the service life of the equipment is improved.

Description

Portable Field Tester for Converter Valves

technical field

The invention belongs to the technical field of test instruments, in particular to a portable on-site converter valve tester.

Background technique

The converter valve is one of the important components of the converter station. Its safe operation is an important part of the grid security, and its routine maintenance is the only effective guarantee. The equipment in the converter station is dense and the distance between the equipment is small. The engineering vehicle cannot drive directly to the vicinity of the converter valve equipment. When testing the converter valve, the staff needs to remove the tester from the engineering vehicle and carry it to the vicinity of the converter valve. The detector itself is relatively heavy. In order to facilitate the staff to carry it, rollers are usually installed at the bottom of the detector and dragged to the site by the staff. Converter stations under construction and those in remote areas often have no ground pavement hardening, and the ground is poor in flatness, especially after rain. The ground is muddy, and small-diameter rollers are difficult to pass on such ground. Large-diameter rollers will make the overall equipment unable to be stored in the engineering vehicle, which brings difficulties to the maintenance work of the converter valve.

Contents of the invention

In order to solve the above problems, the purpose of the present invention is to provide a portable on-site converter valve tester. Large-diameter moving wheels are installed on both sides of the tester base plate, so that the tester base plate is higher than the ground, and can adapt to complex road conditions. Greatly improve its passing performance. And the moving wheels can be folded to both sides of the converter valve tester under the drive of the rectangular sliding sleeve, so that the longitudinal height of the overall equipment is greatly reduced, so that it can be stored in an engineering vehicle for transfer.

The technical solution adopted by the present invention to solve its technical problems is: the portable on-site converter valve tester includes a converter valve tester, a tester base plate is arranged under the converter valve tester, and the tester base plate It is rectangular, and a rectangular sliding sleeve is respectively provided at the positions on both sides of the tester base plate, and the rectangular sliding sleeves are arranged along the length direction of the tester base plate, and each rectangular sliding sleeve is connected with the tester base plate through hinge shafts, and each hinge shaft There are torsion springs on the top, and the torsion springs make the corresponding rectangular sliding sleeves always have a tendency to rotate outward. Each rectangular sliding sleeve is equipped with a rectangular sliding plate that can slide up and down inside it. There are positioning blocks, and the positioning blocks can fall to the top of the rectangular sliding sleeve. Two wheel axles are arranged on the outside of the bottom of the rectangular sliding plate, and moving wheels are arranged on each wheel axle. Two wheels are arranged on the outside of the rectangular sliding sleeve A strip chute, the position of the strip chute corresponds to the axle, and a rectangular frame is arranged above the bottom plate of the tester, and the width direction of the rectangular frame is connected to the width direction of the bottom plate of the tester through a V-shaped bracket. Connection, when each rectangular sliding sleeve is perpendicular to the bottom plate of the tester, the top of the rectangular sliding plate inside the rectangular sliding sleeve can contact the bottom end of the rectangular frame, and the outer periphery of the rectangular frame is provided with a test connecting wire winding groove. A telescopic rod is installed on the tester base plate, the lower end of the telescopic rod is connected with the tester base plate, a remote control pan/tilt is installed at the upper end of the telescopic pole, and a remote camera and a remote control lighting are installed on the remote control pan/tilt. The telescopic rod is a hollow structure, and the power supply lines of the remote control camera and the remote control lighting lamp are coil spring cables, and the coil spring cables pass through the interior of the telescopic rod and are connected to the converter valve tester. The inner sides of the two rectangular sliding sleeves are respectively connected to one end of a stay cord, and the bottom of the rectangular frame in the width direction is provided with pulleys, and the two stay cords pass through the pulleys and are connected to the same positioning ring. Positioning hooks are arranged between the V-shaped brackets, and the positioning ring can drive the pull cord to hang on the positioning hooks.

The positive effect of the present invention is that large-diameter moving wheels are installed on both sides of the bottom plate of the tester, so that the bottom plate of the tester is higher than the ground, which can adapt to complex road conditions and greatly improve its passing performance. And the moving wheels can be folded to both sides of the converter valve tester under the drive of the rectangular sliding sleeve, so that the longitudinal height of the overall equipment is greatly reduced, so that it can be stored in an engineering vehicle for transfer. The setting of the positioning ring can ensure that the moving wheel and the rectangular sliding sleeve can be folded up more quickly by one person, so that the converter valve tester can be put into use more quickly when the converter valve position is reached. When the positioning ring is hung on the positioning hook, the folded state of the rectangular sliding sleeve and the moving wheel can be locked, and it will not be accidentally opened due to shaking when transporting to the engineering vehicle, which not only improves the service life of the equipment, but also ensures Operator safety.

Description of drawings

Fig. 1 is a structural representation of the present invention, shown in the figure as walking state;

Fig. 2 is a schematic diagram of the left view structure of Fig. 1;

Fig. 3 is a schematic diagram of the state in which the moving wheel of the structure shown in Fig. 1 is folded;

Fig. 4 is a functional block diagram of the converter valve tester;

Fig. 5 is the connection schematic diagram of local trigger test;

Fig. 6 is the connection schematic diagram of background trigger test;

Fig. 7 is the connection schematic diagram of damping test;

Fig. 8 is the connection schematic diagram of pressure equalization compensation test;

Fig. 9 is a schematic diagram of the structure and assembly of the converter valve tester.

In the figure 1 tester bottom plate, 2 rectangular sliding sleeve, 3 hinged shaft, 4 torsion spring, 5 rectangular sliding plate, 6 positioning block, 7 wheel shaft, 8 moving wheel, 9 strip chute, 10 converter valve tester, 11 rectangular Frame, 12V-type bracket, 13 test connection wire winding groove, 14 drawstring, 15 pulley, 16 positioning ring, 17 positioning hook, 1A front panel, 2A front panel frame, 3A main board, 4A radiator, 5A lower cover, 6A fan, 7A switching power supply, 8A right board, 9A back board, 10A upper cover board, 11A left board, 12A power resistor, 13A transformer, 14A fiber optic adapter board.

Detailed ways

The portable on-site converter valve tester described in the present invention includes a converter valve tester 10, and a tester base plate 1 is provided under the converter valve tester 10, and the tester base plate 1 is rectangular. A rectangular sliding sleeve 2 is respectively provided on both sides of the tester base plate 1, and the rectangular sliding sleeve 2 is arranged along the length direction of the tester base plate 1, and each rectangular sliding sleeve 2 is connected with the tester base plate 1 through a hinge shaft 3, Each hinge shaft 3 is provided with a torsion spring 4, and the torsion spring 4 makes the corresponding rectangular sliding sleeve 2 always have a tendency to rotate outward, and each rectangular sliding sleeve 2 is provided with a rectangular sliding plate 5 that can slide up and down inside it. , the top of the rectangular slide 5 is provided with a positioning block 6, the positioning block 6 can fall to the top of the rectangular sliding sleeve 2, the outside of the bottom of the rectangular slide 5 is provided with two axles 7, each axle 7 is provided with There are moving wheels 8, and the outside of the rectangular sliding sleeve 2 is provided with two strip chutes 9, the position of the strip chute 9 is corresponding to the wheel shaft 7, and the top of the tester base plate 1 is provided with Rectangular frame 11, the width direction of described rectangular frame 11 and the width direction of tester base plate 1 are connected by V-shaped bracket 12, when each rectangular sliding sleeve 2 is perpendicular to tester base plate 1, the rectangular sliding plate inside rectangular sliding sleeve 2 The top end of 5 can be in contact with the bottom end of the rectangular frame 11, and the outer periphery of the rectangular frame 11 is provided with a test connecting wire winding groove 13.

When the portable on-site converter valve tester needs to be stored in the engineering vehicle, first push the rectangular sliding sleeve 2 to rotate inward at a certain angle, so that the top of the rectangular sliding plate 5 is separated from the bottom of the rectangular frame 11, and then push the moving wheel 8 upward, The wheel shaft 7 is located at the upper end of the strip chute 9, at this time the moving wheel 8 is off the ground and is located on both sides of the converter valve tester 10, after the rectangular frame 11 loses the support of the rectangular slide plate 5 and the moving wheel 8 , under the action of gravity, the bottom plate 1 of the tester, the two rectangular sliding sleeves 2, the converter valve tester 10 and the rectangular frame 11 fall down to the ground position. It is stored on the engineering vehicle for the test work of the converter valve transferred to different places.

When it is necessary to remove the portable on-site converter valve tester from the engineering vehicle and move it to the converter valve, the rectangular frame 11 can be lifted up first, and the rectangular sliding plate 5 and the moving wheel 8 will move downward under the action of its own weight , under the thrust of the torsion spring 4, the rectangular sliding sleeve 2 rotates outward. When the rectangular sliding sleeve 2 is perpendicular to the bottom plate 1 of the tester, as shown in FIG. Cover 2 no longer rotates, moving wheel 8 is on the ground, and is positioned at the below of both sides of tester base plate 1, and described rectangular slide plate 5 and moving wheel 8 provide support for rectangular frame 11, and tester base plate 1 keeps the state of leaving the ground. The moving wheel 8 can be a large-diameter moving wheel, and the tester base plate 1 is relatively high from the ground, which can adapt to complex road conditions and greatly improve its passing performance. The test connection wire of the converter valve tester can be wound in the test connection wire winding groove 13, and moves together with the tester, no need to find additional space to store the connection wire, and when it reaches the converter valve position, it can be Carry out wiring test, saving test time.

Since the converter valves are basically installed overhead and a certain distance away from the ground, the testers need to check the model, serial number and other information on the converter valves when testing the converter valves. For flow valve information, a telescopic rod 201 can be installed on the tester base plate 1, the lower end of the telescopic rod 201 is connected with the tester base plate 1, the remote control pan/tilt 202 is installed on the telescopic pole 201 upper end, and the remote control camera 203 and remote control lighting are installed on the remote control pan/tilt 202 lamp 204. After arriving at the test position, the tester can first extend the telescopic rod 201 to raise the remote control pan/tilt 202, adjust the angle of the remote control pan/tilt 202 through the remote control device or mobile phone software, and use the remote control camera 203 to take pictures of the model and serial number of the converter valve, etc. The information is for testers to verify. When the light is not good, the remote control lighting 204 can be remotely turned on through the remote control device or mobile phone software, and the shooting area of the remote control camera 203 can be supplemented with light. When the tester performs the operation of docking the test line interface, the remote control lighting lamp 204 can also be turned on for lighting.

In order to prevent the power supply lines of the remote control camera 203 and the remote control lighting lamp 204 from affecting the folding of the moving wheel 8, the telescopic rod 201 can support a hollow structure, and the power supply lines of the remote control camera 203 and the remote control lighting lamp 204 are coil spring cables 205 , the helical spring cable 205 passes through the interior of the telescopic rod 201 and is connected to the converter valve tester 10 .

Preferably, in order to make the folding operation of the whole device easier, the inner sides of the two rectangular sliding sleeves 2 are respectively connected to one end of a stay rope 14, and the bottom of the rectangular frame 11 in the width direction is provided with a pulley 15. Two stay ropes 14 pass through the pulley 15 and are connected to the same positioning ring 16 . Pulling the positioning ring 16 can fold the moving wheel 8 and the rectangular sliding sleeve 2 faster, which can be completed by one person, so that the converter valve tester can be put into use more quickly when the converter valve position is reached.

Preferably, in order to make the portable on-site converter valve tester be placed in the engineering vehicle more stably, a positioning hook 17 is provided between the V-shaped brackets 12, and the positioning ring 16 can drive the pull rope 14 to hang on the positioning hook 17. When locating ring 16 is hung on locating hook 17, the folded state of rectangular sliding sleeve 2 and moving wheel 8 can be locked, and can not be accidentally opened due to situations such as rocking when carrying in engineering vehicle.

The above-mentioned converter valve tester can be an existing converter valve pressure equalization tester, and a trigger test device for the thyristor unit of the converter valve and a parameter test device for the thyristor-level damping circuit of the converter valve can be added inside it, so as to Realize the functions of triggering test, pressure equalization compensation test and damping parameter determination.

Preferably, in order to simultaneously realize the trigger test, voltage equalization compensation test, and damping parameter determination, the following schemes can also be implemented: this scheme is implemented in this way, and the functional block diagram of the tester is shown in Figure 4, including 49V DC source, power frequency High voltage source, FM low voltage source, signal acquisition circuit, man-machine interface, switch group, display control unit and main components of electro-optical conversion. The signal acquisition circuit is composed of reference voltage division, deviation sampling, voltage sampling, current sampling, and analog-to-digital conversion, and is connected to the display and control unit. The man-machine interface part is composed of LCD, button group, indicator light and foot switch, and is directly connected to the display and control unit.

Further, the 49V DC power supply is directly output to the terminal auxiliary power supply, and forms an auxiliary power supply circuit with the terminal common end to supply power to the test object.

Further, the power frequency high voltage source and the variable frequency low voltage source are automatically switched to the terminal high voltage terminal and the terminal common terminal through the switch group according to the test requirements, providing incentives for the test object, and lighting the warning light while outputting high voltage.

Furthermore, the frequency-variable low-voltage source can also be disconnected or connected to the BNC connector "frequency-variable output" through the switch group. The reference voltage is obtained from the BNC connector "frequency conversion output", and after 200:1 voltage division, it is differenced with the signal from the BNC connector "compensation input" through deviation sampling to obtain an amplified error signal and enter the modulus convert.

Further, the voltage sampling is sampled from both ends of the terminal high-voltage terminal and the terminal common terminal, and enters analog-to-digital conversion after signal conditioning.

Further, the current sampling is sampled from both ends of Rs connected to the common terminal of the terminal, and enters analog-to-digital conversion after signal conditioning. The output result of analog-to-digital conversion enters the display and control unit.

Furthermore, the zero-crossing detection takes the signal from the power frequency high-voltage source, and directly enters the display and control unit after passing through the comparator.

Further, the display and control unit controls the electro-optical conversion to output the coded message to the GU fiber to the VBE fiber port.

Furthermore, the display and control unit also controls the switch group to realize the selection of the excitation source.

In order to illustrate the technical solutions described in this solution, specific examples will be used below to illustrate.

Figure 5 shows a schematic diagram of the local trigger test provided by the embodiment of the present invention. For the convenience of illustration, only the parts related to the embodiment of the present invention are shown. The test process is as follows: before the test, connect the auxiliary source terminal to the trigger board The high-voltage end is connected to the anode of the thyristor, the common end is connected to the cathode of the thyristor, and the GU fiber is connected to the trigger port of the trigger board. During the test, step on the foot switch, the tester outputs 250V/5A excitation, and sends a trigger command from the GU fiber at a pre-specified trigger angle to turn on the thyristor. The zero-crossing detection circuit is used for firing angle reference. The measurement circuit detects the voltage at both ends of the thyristor and the flow current to judge the conduction status of the thyristor, and generates a test report.

Figure 6 shows a schematic diagram of the background trigger test provided by the embodiment of the present invention. For the convenience of illustration, only the parts related to the embodiment of the present invention are shown. The test process is as follows: before the test, connect the auxiliary source terminal to the trigger board The power supply port of the power supply, the high-voltage end is connected to the anode of the thyristor, the common end is connected to the cathode of the thyristor, and the VBE fiber is connected to the background system port. When the foot switch is stepped on during the test, the tester outputs 250V/5A excitation, the VBE optical fiber sends a trigger request to the background system of the converter valve, and then the background system sends a conduction command to make the thyristor conduction.

Figure 7 shows a schematic diagram of the damping parameter test provided by the embodiment of the present invention. For the convenience of illustration, only the parts related to the embodiment of the present invention are shown. The test process is as follows: the tester first outputs the variable frequency low voltage source through the switch group to the high voltage terminal and the common terminal. The damping parameters can be decomposed into direct-axis components and quadrature-axis components, and the influence of other DC branches needs to be excluded before the measurement is formal. The tester uses 0Hz DC excitation to add to both ends of the thyristor, and detects the terminal voltage and output current of the tester to obtain the impedance of the DC branch. In the same way, the tester applies AC excitation to both ends of the thyristor, and deducts the shunt effect of the DC branch through the software, detects the voltage amplitude, current amplitude, and voltage-current phase angle, and the magnitude of the quadrature-axis component and the direct-axis component can be obtained . Optimally, the tester uses an AC excitation frequency of 2.7KHz and an amplitude of 80Vpp. At this time, the impedance angle of the damping loop is approximately 45 degrees.

Fig. 8 shows a schematic diagram of the voltage equalization compensation test provided by the embodiment of the present invention. For the convenience of illustration, only the parts related to the embodiment of the present invention are shown. The test process is as follows: before the test, the BNC on the tester The output connector is connected to both ends of the thyristor, and the output measuring point on the equalization compensation board is returned to the BNC input connector through the shielded wire. During the test, the tester first switches the variable-frequency low-voltage source to the BNC output connector through the switch group, and then the tester outputs a low-frequency calibration signal, and the user manually adjusts the knob on the panel to return the device indication value to 0, and manually switches to high-frequency calibration signal, adjust the potentiometer on the voltage divider compensation board to make the indication value of the device return to 0 again, and repeat the above low-frequency and high-frequency calibration process until the indication value of the device is close to 0 in all cases. Optimally, 100Hz and 80Vpp are used for low frequency, and 10KHz and 80Vpp are used for high frequency.

Fig. 9 shows the structure and assembly schematic diagram of the embodiment of the present invention, the whole machine adopts all-metal chassis and consists of front panel 1A, front panel frame 2A, lower cover plate 5A, right side panel 8A, back panel 9A, back panel frame, upper The cover plate 10A, the left side plate 11A, and the like are composed of components. The interior of the device includes main board 3A, radiator 4A, fan 6A, switching power supply 7A, power resistor 12A, transformer 13A, fiber optic adapter board 14A and other components. Among them, the front panel 1A integrates components such as an operation interface, LCD, indicator light, and connection terminals, and the back panel 9A is mainly used for power input. The heat sink 4A and the fan 6A inside the device dissipate heat for the power supply assembly and the power amplifier assembly on the main board 3A.

The technical solutions of the present invention are not limited within the scope of the embodiments described in the present invention. The technical contents not described in detail in the present invention are all known technologies.

Claims (5)

1. A portable on-site converter valve tester, comprising a converter valve tester (10), is characterized in that: the converter valve tester (10) is provided with a tester base plate (1), the The bottom plate (1) of the tester is rectangular, and a rectangular sliding sleeve (2) is respectively provided on both sides of the bottom plate (1) of the tester, and the rectangular sliding sleeve (2) is along the length direction of the bottom plate (1) of the tester Setting, each rectangular sliding sleeve (2) is connected with the tester base plate (1) through a hinge shaft (3), each hinge shaft (3) is provided with a torsion spring (4), and the torsion spring (4) allows its corresponding rectangle The sliding sleeves (2) always have a tendency to rotate outward, and each rectangular sliding sleeve (2) is provided with a rectangular sliding plate (5) that can slide up and down inside it, and the top of the rectangular sliding plate (5) is provided with a positioning block (6), the positioning block (6) can drop to the top of the rectangular sliding sleeve (2), and the outside of the bottom of the rectangular sliding plate (5) is provided with two axles (7), and each axle (7) is provided with There are moving wheels (8), and two strip chutes (9) are arranged on the outside of the rectangular sliding sleeve (2), and the positions of the strip chutes (9) correspond to the axles (7) , a rectangular frame (11) is provided above the tester base plate (1), the width direction of the rectangular frame (11) is connected with the width direction of the tester base plate (1) through a V-shaped bracket (12), when each When the rectangular sliding sleeve (2) is perpendicular to the tester base plate (1), the top of the rectangular sliding plate (5) inside the rectangular sliding sleeve (2) can be in contact with the bottom end of the rectangular frame (11), and the rectangular frame (11) ) is provided with a test connecting wire winding groove (13). 2. A portable on-site converter valve tester according to claim 1, characterized in that: a telescopic rod (201) is installed on the bottom plate (1) of the tester, and the lower end of the telescopic rod (201) is connected to the bottom plate (1) of the tester ) connection, telescopic rod (201) upper end installs remote control cloud platform (202), and remote control camera (203) and remote control light (204) are installed on the remote control cloud platform (202). 3. A portable on-site converter valve tester according to claim 1, characterized in that: the telescopic rod (201) is a hollow structure, and the power supply lines of the remote control camera (203) and the remote control lighting (204) It is a helical spring cable (205), and the helical spring cable (205) passes through the inside of the telescopic rod (201) and is connected to the converter valve tester (10). 4. A portable on-site converter valve tester according to claim 1, characterized in that: the inner sides of the two rectangular sliding sleeves (2) are respectively connected to one end of a pull rope (14), and the rectangular A pulley (15) is provided at the bottom of the frame (11) in the width direction, and the two stay ropes (14) pass through the pulley (15) and are connected to the same positioning ring (16). 5. A portable on-site converter valve tester according to claim 1, characterized in that: a positioning hook (17) is provided between the V-shaped brackets (12), and the positioning ring (16) can drive and pull Rope (14) hangs on the positioning hook (17).