CN214201622U - Detection system for lightning arrester of extra-high voltage transmission line - Google Patents

Abstract

The utility model provides a detecting system of special high tension transmission line arrester belongs to the electrical technology field. Including direct current high voltage generator subassembly, arrester group and shaft tower: the tower is used for hoisting the direct-current high-voltage generator assembly; the grounding end of the direct-current high-voltage generator assembly is connected to a grounding block of a tower; the pressurizing end of a first lightning arrester in the lightning arrester group is connected to the high-voltage output end of the direct-current high-voltage generator component, the grounding end of the first lightning arrester is grounded, a second lightning arrester adjacent to the pressurizing end of the first lightning arrester is suspended, a third lightning arrester adjacent to the suspended end of the second lightning arrester is connected to the bottom current measurement output end of the direct-current high-voltage generator component, and the lightning arresters except the first lightning arrester, the second lightning arrester and the third lightning arrester in the lightning arrester group are grounded; and the direct-current high-voltage generator assembly is used for testing direct-current reference voltage and leakage current of the first lightning arrester.

Description

Detection system for lightning arrester of extra-high voltage transmission line

Technical Field

The utility model relates to an electrical technology field especially relates to a detecting system of special high tension transmission line arrester.

Background

The lightning arrester is used for limiting lightning overvoltage and operation overvoltage, so that equipment or a power transmission line in a transformer substation is protected from being damaged by the overvoltage. When the lightning arrester is put into use, the lightning arrester bears the action of power frequency or direct current voltage for a long time and is influenced by water vapor and dirt in the environment, and a metal oxide valve plate in the lightning arrester is easy to be affected by moisture and age, so that the temperature is easy to rise and even the lightning arrester explodes.

In order to solve the potential safety hazard, an effective method is to perform direct current reference voltage test and leakage current measurement on the lightning arrester, wherein the detected changes of parameters such as direct current reference voltage, direct current leakage current and the like can effectively reflect the damp or aging condition of the metal valve plate in the lightning arrester.

The voltage class of extra-high voltage transmission line is high, and the arrester is arranged with the mode of a plurality of series connections usually, hangs down on the shaft tower, because transmission line shaft tower is higher, even the arrester of end position also can be apart from ground several tens meters, and current detection mode is extremely wasted time and energy: the lightning arresters are disassembled from the pole tower and the wire by using a large-tonnage crane and then are placed on the open ground for testing, the serially-connected lightning arresters are disassembled one by one, the safety fence is arranged, and after each section of lightning arrester (element) is tested, the lightning arresters are assembled by using the crane and are hoisted to the hoisting position of the lightning arrester again. This detection approach has a number of disadvantages: in the whole test working process, an operator faces the high-voltage electric shock risk and the personal safety problem when the equipment is hoisted, disassembled and assembled, and the risk of equipment damage exists in the disassembling, assembling and hoisting processes; in addition, the lightning arrester is split and then placed in a limited field space, stray current is likely to be generated, if the lightning arrester is placed improperly, the lightning arrester can be damaged, and even if the lightning arrester is tested to be qualified, metal powder, dust, water vapor and the like can be mixed into a joint when the lightning arrester is re-installed, so that the lightning arrester fails; the disassembly and the assembly of the lightning arrester both need a large-tonnage crane to operate, occupy a large operation field, and simultaneously need a plurality of testers to operate, thereby consuming a large amount of manpower and material resources.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a detecting system of special high tension transmission line arrester need not the dismouting arrester, need not to change iron tower and the original wiring state of arrester, under the accurate prerequisite of assurance test result, guarantees the safety of operation personnel and equipment as far as, and the material resources of using manpower sparingly improve work efficiency.

The embodiment of the utility model provides a solve the technical scheme that its technical problem adopted and be:

the utility model provides a detecting system of extra-high voltage transmission line arrester, includes direct current high voltage generator subassembly, arrester group and shaft tower:

the tower is used for hoisting the direct-current high-voltage generator assembly; the grounding end of the direct current high-voltage generator assembly is connected to a grounding block of the tower;

a pressurizing end of a first lightning arrester in the lightning arrester group is connected to a high-voltage output end of the direct-current high-voltage generator assembly, a grounding end of the first lightning arrester is grounded, a second lightning arrester adjacent to the pressurizing end of the first lightning arrester is suspended, a third lightning arrester adjacent to a suspended end of the second lightning arrester is connected to a bottom current measuring output end of the direct-current high-voltage generator assembly, and lightning arresters except the first lightning arrester, the second lightning arrester and the third lightning arrester in the lightning arrester group are grounded;

the direct-current high-voltage generator assembly is used for testing direct-current reference voltage and leakage current of the first lightning arrester; and the device is also used for grounding discharge after the direct current reference voltage and the leakage current test are finished.

Preferably, the tower is provided with a lifting device, and the lifting device is a chain hoist or a pulley block; the direct-current high-voltage generator assembly comprises a metal bottom plate, a direct-current high-voltage generator arranged on the metal bottom plate, an automatic grounding device arranged on the metal bottom plate, and an equalizing ring arranged on a high-voltage output end in the direct-current high-voltage generator, wherein four lifting points are symmetrically arranged on the direct-current high-voltage generator, and a pair of lifting traction rings is arranged at the bottom of the metal bottom plate;

the lifting device is connected with the lifting points of the direct-current high-voltage generator assembly through an insulating lifting rope, and the distances between the four lifting points and the lifting device are the same so as to keep the direct-current high-voltage generator assembly balanced;

traction pull ropes are respectively arranged on the two hoisting traction rings and used for preventing the direct current high voltage generator assembly from touching the tower in the ascending process of the direct current high voltage generator assembly;

after the direct-current high-voltage generator assembly rises to a target height, the direct-current high-voltage generator assembly is fixedly connected with the tower through a fixed rod, and the two traction pull ropes are anchored on the ground.

Preferably, the fixing rods comprise metal fixing heads, rods and tail chains, the rods are made of insulating materials, the number of the fixing rods for fixing the direct-current high-voltage generator assembly is at least 2, the metal fixing heads are fixed on the side edges of the metal base plate, and the side plates of the metal base plate are close to the grounding block;

the tail chain is fixed on the tower.

Preferably, the metal fixing head and the grounding block are connected through a grounding wire.

Preferably, the dc high voltage generator assembly further comprises a microammeter connected to the bottom current measurement output, the lead of the third arrester being connected to the microammeter, the microammeter being configured to measure the current flowing in the third arrester.

Preferably, a second arrestor adjacent to the pressurizing end of the first arrestor is suspended such that a lead wire of the second arrestor is fixed to an insulating rod and a lead wire of the second arrestor is at a high level.

Preferably, a storage battery is arranged in the direct-current high-voltage generator assembly, and an additional direct-current high-voltage power supply is not needed for supplying power;

the automatic grounding device in the direct-current high-voltage generator assembly is internally provided with a storage battery, and additional power supply is not needed.

According to the technical scheme, the embodiment of the utility model provides a detection system of extra-high voltage transmission line arrester need not change the installation state of arrester, also need not to change iron tower and the original wiring state of arrester, through the direct current high voltage generator of integral type, only need once change the test wiring of one side one by one after wiring, operating personnel can remote control accomplish corresponding pressurization, step-down and operation such as ground discharge on the ground, guarantee the safety of operation personnel and equipment; the operation is simple, on the premise of ensuring the accuracy of the test result, the manpower and material resources are saved, and the working efficiency is improved.

Drawings

Fig. 1 is the utility model discloses first section arrester test wiring and equipment relative position sketch map.

Fig. 2 is the utility model discloses special high tension transmission line arrester's detecting system's component structure schematic diagram.

Fig. 3 is the utility model discloses the flow chart of the detection method of special high tension transmission line arrester.

Fig. 4 is a schematic structural diagram of a dc high voltage generator assembly according to an embodiment of the present invention.

Fig. 5 is a schematic view of the connection between the metal base and the tower of the dc high voltage generator module according to the embodiment of the present invention.

Fig. 6 is the utility model discloses second section arrester test wiring and equipment relative position sketch map.

Fig. 7 is the utility model discloses third section arrester test wiring and equipment relative position sketch map of embodiment.

Fig. 8 is the utility model discloses a fourth section arrester test wiring and equipment relative position sketch map.

Fig. 9 is the schematic diagram of the fifth section of lightning arrester testing wiring and the relative position of the equipment in the embodiment of the utility model.

Fig. 10 is a schematic diagram of the test wiring and the relative position of the equipment of the sixth section of the lightning arrester according to the embodiment of the present invention.

Fig. 11 is the schematic diagram of the seventh section lightning arrester test wiring and the relative position of the equipment in the embodiment of the utility model.

In the figure: the device comprises a direct current high-voltage generator assembly 1, an arrester group 2, a tower 3, a metal bottom plate 11, a direct current high-voltage generator 12, a high-voltage output end 13, an automatic grounding device 14, a grading ring 15, a lifting point 16, a lifting traction ring 17, a bottom current measurement output end 18, a microammeter 19, a remote control terminal 10, a first section of arrester 21, a second section of arrester 22, a third section of arrester 23, a fourth section of arrester 24, a fifth section of arrester 25, a sixth section of arrester 26, a seventh section of arrester 27, a lead wire L1, a lead wire L2, a lead wire L3, a lead wire L4, a lead wire L5, a lead wire L6, a lead wire L7, a grounding block 31, a lifting device 32, an insulating lifting rope 4, a traction pull rope 5, a fixing rod 6, a metal fixing head 61, a rod 62, a tail chain 63 and an insulating rod 7.

Detailed Description

The following combines the drawings of the utility model to further elaborate the technical scheme and technical effect of the utility model.

An embodiment of the utility model provides a detecting system of extra-high voltage transmission line arrester, as shown in fig. 2, need not change the installation state of arrester, also need not to change iron tower and the original wiring state of arrester, through the direct current high voltage generator subassembly of integral type, only need the experimental wiring of changing one side one by one after the disposable wiring, the wiring condition uses fig. 1 as an example. The system can be used for implementing the operation flow shown in fig. 3, the devices included in the system include a dc high voltage generator assembly 1, a lightning arrester group 2 and a tower 3, please refer to fig. 4 and fig. 5 together, the dc high voltage generator assembly 1 includes a metal base plate 11, a dc high voltage generator 12 mounted on the metal base plate 11, a high voltage output end 13, a remote control terminal 10 of the dc high voltage generator 12, an automatic grounding device 14 mounted on the metal base plate 11, an equalizing ring 15 mounted on the high voltage output end 13, four lifting points 16 arranged on the dc high voltage generator 12, a pair of lifting traction rings 17 arranged at the bottom of the metal base plate 11, and a microammeter 19 connected to a bottom current measurement output end 18; the lightning arrester group 2 comprises a plurality of lightning arresters which are connected in series, and at least 3 lightning arresters are arranged; the tower 3 comprises a grounding block 31, a lifting device 32 and a tower body.

Specifically, the embodiment of the utility model provides a detecting system of special high tension transmission line arrester can be used to detect the arrester, and its implementation process can include:

step S1, hoisting the direct-current high-voltage generator assembly 1 on a tower 3;

step S2, connecting the grounding end of the direct current high voltage generator component 1 to the grounding block 31 of the tower 3;

step S3, the pressurizing end of the first lightning arrester in the lightning arrester group 2 is connected to the high-voltage output end of the direct-current high-voltage generator component 1, the grounding end of the first lightning arrester is grounded, the second lightning arrester adjacent to the pressurizing end of the first lightning arrester is suspended, the third lightning arrester adjacent to the suspended end of the second lightning arrester is connected to the bottom current measuring output end of the direct-current high-voltage generator component 1, and the lightning arresters in the lightning arrester group 2 except the first lightning arrester, the second lightning arrester and the third lightning arrester are grounded;

step S4, remotely controlling the direct current high voltage generator component 1, and testing the direct current reference voltage and the leakage current of the first lightning arrester;

in step S5, after the dc reference voltage and leakage current test is finished, the dc high voltage generator module 1 is grounded and discharged.

In the embodiment of the present invention, step S1 hoists the dc high voltage generator assembly 1 through the hoisting device 32, and the tower 3 is provided with the hoisting device 32, specifically, the hoisting device 32 may be a chain block or a pulley block; connecting the lifting device 32 with the lifting points 16 of the direct-current high-voltage generator assembly 1 by using the insulating lifting ropes 4, and enabling the distances between the four lifting points 16 and the lifting device 4 to be the same during installation so as to keep the direct-current high-voltage generator assembly 1 balanced;

and traction pull ropes are respectively arranged on the two hoisting traction rings.

In the hoisting process, the hoisting device 32 hoists the direct-current high-voltage generator assembly 1, and in the hoisting process of the direct-current high-voltage generator assembly 1, the direct-current high-voltage generator assembly 1 is pulled through the two traction pull ropes 5 to prevent the direct-current high-voltage generator assembly 1 from touching the tower 3; after the direct-current high-voltage generator assembly 1 rises to a target height, the direct-current high-voltage generator assembly 1 is fixedly connected with a pole tower 4 through a fixed rod 6, and then two traction pull ropes 5 are anchored on the ground.

The fixed rod 6 is used for relatively fixing the high-voltage generator assembly 1 and the tower 4, as shown in fig. 5, a metal fixing head 61 on the fixed rod 6 is fixed on a metal bottom plate 11 and close to the side edge of the tower 3, a tail chain 63 is installed on the tower 3, a rod 62 made of insulating materials is arranged between the metal fixing head 61 and the tail chain 63, the fixing head 61 is tightened up through a rotating rod body, the tail chain 63 is a stainless steel lock chain, one end of a ground wire is connected to the metal fixing head 61, and the other end of the ground wire is connected to the tower 3. The fixing rod 6 can be selected to have different lengths according to different voltage levels and safety distance requirements, can be assembled by multiple sections, and has the function of grounding a system. In actual use, as shown in fig. 5, 2 fixing rods 6 are selected.

In step S2, the grounding end of the dc high voltage generator module 1 specifically means that the metal base plate 11 is grounded through the fixing rod 6, and the metal fixing head 61 and the grounding block 31 are connected by a ground wire, so that the metal base plate 11 is grounded.

The first arrester, the second arrester and the third arrester mentioned in step S3 are used to define the positional relationship of three segments of arresters, and the first segment of arrester 21 in the arrester group 2 is specifically wired as a measured object in fig. 1: the first segment of arrester 21 is used as a first arrester, the second segment of arrester 22 is used as a second arrester, and the third segment of arrester 23 is used as a third arrester, and wiring is performed.

One end of the first section of lightning arrester 21 close to the second lightning arrester 22 is a pressurizing end, the lead wire L1 is connected to the high-voltage output end 13 of the direct-current high-voltage generator component 1, the high-voltage output wiring mode is a spiral type and is used for fixing the pressurizing lead wire, the other end of the first section of lightning arrester 21 is correspondingly a grounding end, and the original connection is grounding;

one end opening of the second section of lightning arrester 22 adjacent to the third section of lightning arrester 23 is suspended, the lead wire L2 has high voltage, the maximum voltage can reach 100Kv, the lead wire L2 can be connected to an insulating rod 7, the insulating rod 7 can be fixed on a tower 3, and the length of the insulating rod 7 cannot be less than 0.5 m;

one end of the third section of lightning arrester 23 is connected with the second section of lightning arrester 22, and a lead wire L3 at the other end is connected to the direct current high voltage generator assembly 1 and is connected to the bottom current measurement output end 18 in series through the microammeter 19;

the lead wire L4 of the fourth segment arrester 24, the lead wire L5 of the fifth segment arrester 25, the lead wire L6 of the sixth segment arrester 26 and the lead wire L7 of the seventh segment arrester 27 in the arrester group 2 are connected to the ground block 31 for grounding. The leads L1 and L2 with high voltage cannot be overlapped with the leads L3, L4, L5, L6 and L7 with low voltage, and the leads with low voltage cannot be hinged with each other. And finishing wiring.

In step S4, the remote control performs a dc reference voltage and leakage current test on the first segment of the lightning arrester 21. Because the embodiment of the utility model provides a built-in battery of direct current high voltage generator among the direct current high voltage generator subassembly 1 that adopts, and automatic earthing device embeds the battery, all need not extra mains operated, so can guarantee completely that the operation personnel control direct current high voltage generator subassembly 1 through remote control terminal 10 outside safe distance, accomplish direct current reference voltage and leakage current test operation. The specific operation is as follows:

control direct current high voltage generator subassembly 1 through remote control terminal 10, carry out direct current reference voltage and leakage current test to first section arrester 21 and include:

the remote control terminal 10 starts the direct current high voltage generator 12;

receiving the current value of the high-voltage output end 13 sent by the direct-current high-voltage generator 12;

receiving the current value of the bottom current measurement output end 18 sent by the direct current high voltage generator 12;

a leakage current value is calculated, which is the difference between the current value at the high voltage output 13 and the current value at the bottom current measurement output 18.

The current value measured by the microammeter 19 is transmitted by means of wireless signal interactive transmission between the remote control terminal 10 and the dc high voltage generator assembly 1, for example, bluetooth signal.

In step S5, after the dc reference voltage and leakage current test is finished, the dc high voltage generator module 1 is grounded and discharged. Specifically, an automatic grounding device 14 is installed on the metal chassis 11 of the dc high voltage generator assembly 1, as shown in fig. 4, and is a telescopic grounding push rod capable of being remotely controlled, and is in a folded state in the initial and testing processes, when a single test is finished, and the automatic grounding device 14 receives a grounding control signal, the telescopic grounding push rod is automatically lifted and then unfolded, so that the tip of the telescopic grounding push rod contacts with the grading ring, and the grading ring of the dc high voltage generator assembly 1 is grounded and decompressed.

The above is a single test process, and the test on the next section of lightning arrester requires that the lead wire can be changed after the discharge of the direct-current high-voltage generator assembly 1 is finished. In the test process, except that the equipment is fixedly installed and the test wiring needs a specially-assigned person to go to the tower for operation, other work is uniformly finished on the ground.

The utility model discloses detection system of extra-high voltage transmission line arrester is applicable to under the scene that has 4 sections arresters at least in arrester group 2 (if want to utilize this system to detect single arrester in arrester group 2 alone, then arrester group 2 can only contain 3 sections arresters), for example arrester group 2 shown in figure 1, contain 7 sections arresters, be applicable to voltage class + -1100 Kv's extra-high voltage direct current transmission line, if voltage class is + -800 Kv's extra-high voltage direct current transmission line, arrester group 2 can contain 4, 5 sections arresters.

The following description will be made of a specific embodiment of the wiring for testing the other arresters of the arrester group 2 shown in the drawings.

Fig. 6 is the experimental wiring schematic diagram of second section arrester 22 of the embodiment of the utility model, wherein regard second section arrester 22 as first arrester, regard third section arrester 23 as second arrester, regard fourth section arrester 24 as third arrester, and the wiring method is:

one end of the second section of lightning arrester 22 close to the third section of lightning arrester 23 is a pressurizing end, the lead wire L2 is connected to the high-voltage output end 13 of the direct-current high-voltage generator assembly 1, the high-voltage output connection mode is a spiral type and is used for fixing the pressurizing lead wire, the other end of the second section of lightning arrester 22 is correspondingly a grounding end, namely the lead wire L1 is grounded, and as shown in the figure, the lead wire L1 can be wound on the upper tower and grounded;

one end opening of the third section of lightning arrester 23 adjacent to the fourth section of lightning arrester 24 is suspended, the lead wire L3 has high voltage, the maximum voltage can reach 100Kv, the lead wire L3 can be connected to an insulating rod 7, the insulating rod 7 can be fixed on a pole tower 3, and the length of the insulating rod 7 cannot be less than 0.5 m;

one end of the fourth section of lightning arrester 24 is connected with the third section of lightning arrester 23, and the lead wire L4 at the other end is connected to the direct current high voltage generator assembly 1 and is connected in series to the bottom current measurement output end 18 through the microammeter 19;

the lead wire L1 of the first segment arrester 21, the lead wire L5 of the fifth segment arrester 25, the lead wire L6 of the sixth segment arrester 26 and the lead wire L7 of the seventh segment arrester 27 in the arrester group 2 are all grounded, and as shown in the figure, the lead wire L5, the lead wire L6 and the lead wire L7 can be connected to the grounding block 31. The leads L2 and L3 with high voltage and the leads L1, L4, L5, L6 and L7 with low voltage cannot be overlapped and the leads with low voltage cannot be hinged with each other. And finishing wiring.

Fig. 7 is the experimental wiring schematic diagram of third section arrester 23 of the embodiment of the utility model, wherein regard third section arrester 23 as first arrester, regard fourth section arrester 24 as second arrester, regard fifth section arrester 25 as third arrester, the wiring method is:

one end of the third section of lightning arrester 23 close to the fourth section of lightning arrester 24 is a pressurizing end, the lead wire L3 is connected to the high-voltage output end 13 of the direct-current high-voltage generator assembly 1, the high-voltage output connection mode is a spiral type and is used for fixing the pressurizing lead wire, the other end of the third section of lightning arrester 23 is correspondingly a grounding end, namely the lead wire L2 is grounded, and as shown in the figure, the lead wire L2 can be wound on the upper tower and grounded;

one end opening of the fourth section of lightning arrester 24 adjacent to the fifth section of lightning arrester 25 is suspended, the lead wire L4 has high voltage, the maximum voltage can reach 100Kv, the lead wire L4 can be connected to an insulating rod 7, the insulating rod 7 can be fixed on a tower 3, and the length of the insulating rod 7 cannot be less than 0.5 m;

one end of the fifth lightning arrester 25 is connected with the fourth lightning arrester 24, and a lead wire L5 at the other end is connected to the direct current high voltage generator assembly 1 and is connected in series to the bottom current measurement output end 18 through the microammeter 19;

the lead wire L1 of the first section arrester 21 in the arrester group 2 can be wound on the upper tower to be grounded, and the lead wire L6 of the sixth section arrester 26 and the lead wire L7 of the seventh section arrester 27 are connected to the grounding block 31 to be grounded. The leads L3 and L4 with high voltage and the leads L1, L2, L5, L6 and L7 with low voltage cannot be overlapped and the leads with low voltage cannot be hinged with each other. And finishing wiring.

Fig. 8 is the experimental wiring schematic diagram of fourth section arrester 24 of the embodiment of the utility model, wherein regard fourth section arrester 24 as first arrester, regard fifth section arrester 25 as second arrester, regard sixth section arrester 26 as third arrester, the wiring method is:

one end of the fourth section of lightning arrester 24 close to the fifth section of lightning arrester 25 is a pressurizing end, the lead wire L4 is connected to the high-voltage output end 13 of the direct-current high-voltage generator assembly 1, the high-voltage output connection mode is a spiral type and is used for fixing the pressurizing lead wire, the other end of the fourth section of lightning arrester 24 is correspondingly a grounding end, namely the lead wire L3 is grounded, and as shown in the figure, the lead wire L3 can be wound on an upper tower and grounded;

one end of the fifth section of lightning arrester 25 adjacent to the sixth section of lightning arrester 26 is suspended, the lead wire L5 has high voltage, the maximum voltage can reach 100Kv, the lead wire L5 can be connected to an insulating rod 7, the insulating rod 7 can be fixed on a tower 3, and the length of the insulating rod 7 cannot be less than 0.5 m;

one end of the sixth lightning arrester 26 is connected with the fifth lightning arrester 25, and the lead wire L6 at the other end is connected to the direct current high voltage generator assembly 1 and is connected in series to the bottom current measurement output end 18 through the microammeter 19;

the lead wire L1 of the first section arrester 21 and the lead wire L2 of the second section arrester 22 in the arrester group 2 can be wound on the upper tower to be grounded, and the lead wire L7 of the seventh section arrester 27 is connected to the grounding block 31 to be grounded. The leads L4 and L5 with high voltage and the leads L1, L2, L3, L6 and L7 with low voltage cannot be overlapped and the leads with low voltage cannot be hinged with each other. And finishing wiring.

Fig. 9 is the experimental wiring schematic diagram of the fifth section of arrester 25 of the embodiment of the utility model, wherein regard fifth section of arrester 25 as first arrester, regard sixth section of arrester 26 as second arrester, regard seventh section of arrester 27 as third arrester, the wiring method is:

one end of the fifth section of lightning arrester 25 close to the sixth section of lightning arrester 26 is a pressurizing end, the lead wire L5 is connected to the high-voltage output end 13 of the direct-current high-voltage generator assembly 1, the high-voltage output connection mode is a spiral type and is used for fixing the pressurizing lead wire, the other end of the fifth section of lightning arrester 25 is correspondingly a grounding end, namely the lead wire L4 is grounded, and as shown in the figure, the lead wire L4 can be wound on the upper tower and grounded;

one end opening of the sixth section of lightning arrester 26 adjacent to the seventh section of lightning arrester 27 is suspended, the lead wire L6 has high voltage, the maximum voltage can reach 100Kv, the lead wire L6 can be connected to an insulating rod 7, the insulating rod 7 can be fixed on a tower 3, and the length of the insulating rod 7 cannot be less than 0.5 m;

one end of the seventh lightning arrester 27 is connected with the sixth lightning arrester 26, and the lead wire L7 at the other end is connected to the direct current high voltage generator assembly 1 and is connected in series to the bottom current measurement output end 18 through the microammeter 19;

the lead wire L1 of the first section arrester 21, the lead wire L2 of the second section arrester 22, the lead wire L3 of the third section arrester 23 and the lead wire L4 of the fourth section arrester 24 in the arrester group 2 can be wound on an upper tower to be grounded. The leads L5 and L6 with high voltage and the leads L1, L2, L3, L4 and L7 with low voltage cannot be overlapped and the leads with low voltage cannot be hinged with each other. And finishing wiring.

Fig. 10 is the experimental wiring schematic diagram of the sixth section of arrester 26 of the embodiment of the present invention, wherein regard the sixth section of arrester 26 as the first arrester, regard the fifth section of arrester 25 as the second arrester, regard the fourth section of arrester 24 as the third arrester, the wiring method is:

one end of the sixth lightning arrester 26 close to the fifth lightning arrester 25 is a pressurizing end, the lead wire L5 is connected to the high-voltage output end 13 of the dc high-voltage generator assembly 1, the high-voltage output connection mode is a spiral type for fixing the pressurizing lead wire, the other end of the sixth lightning arrester 26 is a ground end, namely, the lead wire L6 is grounded, as shown in the figure, the lead wire L6 is connected to the ground block 31 and grounded;

one end of the fifth section of lightning arrester 25 adjacent to the fourth section of lightning arrester 24 is suspended, the lead wire L4 has high voltage, the maximum voltage can reach 100Kv, the lead wire L4 can be connected to an insulating rod 7, the insulating rod 7 can be fixed on a tower 3, and the length of the insulating rod 7 cannot be less than 0.5 m;

one end of the fourth lightning arrester 24 is connected with the fifth lightning arrester 25, and a lead wire L3 at the other end is connected to the direct current high voltage generator assembly 1 and is connected in series to the bottom current measurement output end 18 through the microammeter 19;

the lead wire L1 of the first section arrester 21 and the lead wire L2 of the second section arrester 22 in the arrester group 2 can be wound on the upper tower to be grounded, and the lead wire L7 of the seventh section arrester 27 is connected to the grounding block 31 to be grounded. The leads L4 and L5 with high voltage and the leads L1, L2, L3, L6 and L7 with low voltage cannot be overlapped and the leads with low voltage cannot be hinged with each other. And finishing wiring.

Fig. 11 is the experimental wiring schematic diagram of seventh section arrester 27 of the embodiment of the utility model, wherein regard seventh section arrester 27 as first arrester, regard sixth section arrester 26 as second arrester, regard fifth section arrester 25 as third arrester, the wiring method is:

one end of the seventh lightning arrester 27 close to the sixth lightning arrester 26 is a pressurizing end, the lead wire L6 is connected to the high-voltage output end 13 of the dc high-voltage generator assembly 1, the high-voltage output connection mode is a spiral type for fixing the pressurizing lead wire, the other end of the seventh lightning arrester 27 is a ground end, i.e. the lead wire L7 is grounded, as shown in the figure, the lead wire L7 is connected to the grounding block 31;

one end opening of the sixth section of lightning arrester 26 adjacent to the fifth section of lightning arrester 25 is suspended, the lead wire L5 has high voltage, the maximum voltage can reach 100Kv, the lead wire L5 can be connected to an insulating rod 7, the insulating rod 7 can be fixed on a tower 3, and the length of the insulating rod 7 cannot be less than 0.5 m;

one end of the fifth lightning arrester 25 is connected with the sixth lightning arrester 26, and a lead wire L4 at the other end is connected to the direct current high voltage generator assembly 1 and is connected in series to the bottom current measurement output end 18 through the microammeter 19;

the lead wire L1 of the first section arrester 21, the lead wire L2 of the second section arrester 22 and the lead wire L3 of the third section arrester 23 in the arrester group 2 are wound on an upper tower and grounded. The leads L5 and L6 with high voltage and the leads L1, L2, L3, L4 and L7 with low voltage cannot be overlapped and the leads with low voltage cannot be hinged with each other. And finishing wiring.

The lead wire as the test wire is a black shielding wire, one end of the lead wire is a red clip, the other end of the lead wire is a CX16 male connector, a black shielding extension line can be configured, one end of the lead wire is a black clip, and the other end of the lead wire is a CX16 female connector. The red clamps of the 7 test wires are sequentially connected to the bottoms of the seven tested lightning arresters at one time until the test is finished. If the other end of the test wire needs to be connected with a straight high-voltage end or the bottom of the equipment, the other end of the test wire is directly connected with a CX16 male connector, and if the test wire needs to be grounded or suspended, the test wire needs to be connected with an extension wire and then the next operation is carried out. In the following test wiring change process, the wiring of the red clip ends (tested arrester sides) of the test lines L1-L7 was kept unchanged.

The test object is changed from the first section of arrester 21 to the second section of arrester 22: the lead L5, the lead L6 and the lead L7 keep the original positions unchanged; the lead L1 is pulled out from the straight high-voltage output end 13 and is grounded after being connected with an extension line; the lead L2 is taken down from the insulating rod 7, and is connected to the high-voltage output end 13 after the extension line is removed; the lead wire L3 is pulled out from the bottom current measurement output end 18, and is hung by an insulating rod 7 after being connected with an extension line; the lead L4 is removed from ground and removed from extension to the bottom current measurement output 18.

The test object is changed from the second segment arrester 22 to the third segment arrester 23: the lead L1, the lead L6 and the lead L7 keep the original positions unchanged; the lead L2 is pulled out from the straight high-voltage output end 13 and is grounded after being connected with an extension line; the lead L3 is taken down from the insulating rod 7, and is connected to the high voltage output end 13 after the extension line is removed; the lead wire L4 is pulled out from the bottom current measurement output end 18, and is hung by an insulating rod 7 after being connected with an extension line; the lead L5 is removed from ground and removed from extension to the bottom current measurement output 18.

The test object is changed from the third segment arrester 23 to the fourth segment arrester 24: the lead L1, the lead L2 and the lead L7 keep the original positions unchanged; the lead L3 is pulled out from the straight high-voltage output end 13 and is grounded after being connected with an extension line; the lead L4 is taken down from the insulating rod 7, and is connected to the high voltage output end 13 after the extension line is removed; the lead wire L5 is pulled out from the bottom current measurement output end 18, and is hung by an insulating rod 7 after being connected with an extension line; the lead L6 is removed from ground and removed from extension to the bottom current measurement output 18.

The test object is changed from the fourth section arrester 24 to the fifth section arrester 25: the lead L1, the lead L2 and the lead L3 keep the original positions unchanged; the lead L4 is pulled out from the straight high-voltage output end 13 and is grounded after being connected with an extension line; the lead L5 is taken down from the insulating rod 7, and is connected to the high voltage output end 13 after the extension line is removed; the lead wire L6 is pulled out from the bottom current measurement output end 18, and is hung by an insulating rod 7 after being connected with an extension line; the lead L7 is removed from ground and removed from extension to the bottom current measurement output 18.

The test object was changed from the fifth arrester section 25 to the sixth arrester section 26: the lead L1, the lead L2 and the lead L5 keep the original positions unchanged; the lead L3 and the lead L7 are reversed in position; lead L4 is transposed with lead L6.

The test object was changed from the sixth arrester section 26 to the seventh arrester section 27: the lead L1, the lead L2 and the lead L7 keep the original positions unchanged; the lead wire L3 is pulled out from the bottom current measurement output end 18, connected with an extension wire and then grounded; the lead wire L4 is taken down from the insulating rod, and is connected to the bottom current measurement output end 18 after the extension line is removed; the lead L5 is pulled out from the straight high-voltage output end 13 and is hung by an insulating rod 7 after being connected with an extension line; the lead L6 is removed from the grounding point, and the extension line is removed to be connected to the high voltage direct current output end 13.

In the process of changing wiring, the tester is mainly divided into two types of high-altitude operation personnel (not less than 2 people) and ground operation personnel (not less than 2 people), and the step of changing the test wiring is specifically as follows:

(1) the aerial working personnel install a pulley block or a chain block for hoisting the direct-current high-voltage generator component at a proper position of a tower and lower a lifting rope to the ground;

(2) after a ground operator adjusts the direct-current high-voltage generator (whether the direct-current high-voltage generator is started normally, whether the direct-current high-voltage generator is displayed normally, whether the direct-current high-voltage generator can be connected with a metal base plate in a short circuit mode, whether a grounding wire of the metal base plate is led out along with a fixed rod to be connected, and the like, and the direct-current high-voltage generator is shut down after adjustment is completed), a hanging ring and a traction pull rope are installed, then the direct-current high-voltage generator is lifted to a specified position step by step in a lifting matching traction mode, and a specially-assigned person monitors the lifting state in the period;

(3) when the direct-current high-voltage generator assembly is about to reach a designated position, the direct-current high-voltage generator assembly is fixed on a tower by cooperation of tower personnel, hoisting personnel and monitoring personnel, a lifting rope is adjusted to be kept horizontal, and the lifting rope is fixed;

(4) the test wiring of the tested lightning arrester is completed by the operating personnel on the tower according to the wiring requirement, and the crossing and knotting of all the leads are avoided (the leads are fixedly straightened as far as possible on the premise of ensuring the safe distance);

(5) connecting the grounding wire of the metal bottom plate to a tower grounding part by an operator on the tower;

(6) completing test wiring according to the test wiring requirements of different sections of arresters, and informing other operators on the tower to keep a certain safety distance with the test equipment and the tested arrester after another person on the tower confirms that the wiring is correct;

(7) after the operating personnel on the tower confirms that the wiring is correct again, moves back to the outside of the safe distance and can clearly observe the position of the test process, the ground personnel are informed through the interphone that the wiring is finished and the test can be started;

(8) after the ground operator gets the notice of the operator on the tower, the operator operates on the remote control terminal, opens the high voltage switch, and vocalizes and pressurizes through the interphone, and then completes pressurization, reading, depressurization, high voltage breaking, discharging and grounding in sequence; the tower operator supervises the whole test process, and can immediately carry out emergency shutdown and inform ground operators once the abnormality of the direct-current high-voltage generator or the tested lightning arrester is found;

(9) after the test of one section of the lightning arrester is finished, after a ground personnel report that the test is finished and the discharge is confirmed and the test wiring is replaced is obtained, the discharge grounding condition of the tested lightning arrester is checked, and the test wiring is replaced after no fault exists;

(10) repeating the steps (6) to (9) until all the tests of 7 sections of single lightning arresters are finished;

(11) the test wiring is dismantled to the operating personnel on the tower, resumes the arrester initial condition of being tried, demolishs the straight high hair and is connected with the shaft tower, transfers the direct current high voltage generator safety to ground with the cooperation of ground operating personnel.

In the test process, in order to ensure that the angle between the plane of the direct-current high-voltage generator pressure line and the tested lightning arrester is always vertical, the angle can be adjusted by adjusting the positions of the chain block and the fixed rod.

The starting and the stopping of the direct current high voltage generator component are also provided with remote controllers, and the remote controllers are respectively arranged on the upper part and the lower part of the tower. Personnel on the tower can turn off the power supply of the direct-current high-voltage generator through a remote controller or an emergency stop button on equipment after emergency occurs, and the direct-current high-voltage generator is not used when no abnormal situation occurs.

As shown in fig. 2, the utility model discloses detection system of extra-high voltage transmission line arrester, a serial communication port, include as shown in fig. 4 direct current high voltage generator subassembly 1, arrester group 2 and shaft tower 3:

the direct current high voltage generator component 1 is used for testing direct current reference voltage and leakage current of a designated single lightning arrester in the lightning arrester group 2.

The lightning arrester group 2 is formed by connecting a plurality of lightning arresters in series and is hoisted on the tower 3, and the specific wiring mode in the test process can refer to the detection method of the lightning arrester of the ultra-high voltage transmission line.

The pole tower 3 is used for hoisting the direct-current high-voltage generator assembly 1; but also as a ground termination line.

In the system of the embodiment of the present invention, the dc high voltage generator 12 in the dc high voltage generator assembly 1 is provided with a storage battery inside, and does not need an additional dc high voltage power supply for power supply; the automatic grounding device 14 in the direct current high voltage generator assembly 1 is internally provided with a battery, and extra power supply is not needed, so that an operator can be completely ensured to control the direct current high voltage generator assembly 1 through the remote control terminal 10 outside a safe distance, and the direct current reference voltage and leakage current test operation is completed. After the single test is finished, the lead wire can be changed and connected after the direct current high voltage generator assembly 1 discharges, and in the test process, except that the installation of equipment is fixed and the test wiring needs a specially-assigned person to go to the tower for operation, other work is uniformly finished on the ground.

The embodiment of the utility model provides a detection system of special high tension transmission line arrester, need not to change the installation state of arrester, also need not to change iron tower and the original wiring state of arrester, through the direct current high voltage generator of integral type, only need the test wiring of one side of successive change after once only working a telephone switchboard, operating personnel can remote control accomplish corresponding pressurization, step-down and operation such as ground discharge on the ground, guarantee the safety of operation personnel and equipment; the operation is simple, on the premise of ensuring the accuracy of the test result, the manpower and material resources are saved, and the working efficiency is improved.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

Claims (7)

1. The utility model provides a detecting system of extra-high voltage transmission line arrester which characterized in that, includes direct current high voltage generator subassembly, arrester group and shaft tower:

the tower is used for hoisting the direct-current high-voltage generator assembly; the grounding end of the direct current high-voltage generator assembly is connected to a grounding block of the tower;

a pressurizing end of a first lightning arrester in the lightning arrester group is connected to a high-voltage output end of the direct-current high-voltage generator assembly, a grounding end of the first lightning arrester is grounded, a second lightning arrester adjacent to the pressurizing end of the first lightning arrester is suspended, a third lightning arrester adjacent to a suspended end of the second lightning arrester is connected to a bottom current measuring output end of the direct-current high-voltage generator assembly, and lightning arresters except the first lightning arrester, the second lightning arrester and the third lightning arrester in the lightning arrester group are grounded;

the direct-current high-voltage generator assembly is used for testing direct-current reference voltage and leakage current of the first lightning arrester; and the device is also used for grounding discharge after the direct current reference voltage and the leakage current test are finished.

2. The system of claim 1,

a lifting device is arranged on the tower, and the lifting device is a chain hoist or a pulley block; the direct-current high-voltage generator assembly comprises a metal bottom plate, a direct-current high-voltage generator arranged on the metal bottom plate, an automatic grounding device arranged on the metal bottom plate, and an equalizing ring arranged on a high-voltage output end in the direct-current high-voltage generator, wherein four lifting points are symmetrically arranged on the direct-current high-voltage generator, and a pair of lifting traction rings is arranged at the bottom of the metal bottom plate;

the lifting device is connected with the lifting points of the direct-current high-voltage generator assembly through an insulating lifting rope, and the distances between the four lifting points and the lifting device are the same so as to keep the direct-current high-voltage generator assembly balanced;

traction pull ropes are respectively arranged on the two hoisting traction rings and used for preventing the direct current high voltage generator assembly from touching the tower in the ascending process of the direct current high voltage generator assembly;

after the direct-current high-voltage generator assembly rises to a target height, the direct-current high-voltage generator assembly is fixedly connected with the tower through a fixed rod, and the two traction pull ropes are anchored on the ground.

3. The system of claim 2, wherein the fixing rods comprise metal fixing heads, rods and tail chains, the rods are made of insulating materials, the metal fixing heads are grounded, at least 2 fixing rods for fixing the direct current high voltage generator assembly are arranged on the ground wire of the metal fixing heads, the metal fixing heads are fixed on the side edges of the metal bottom plate, and the side plates of the metal bottom plate are close to the grounding block;

the tail chain is fixed on the tower.

4. The system of claim 3, wherein the metal retaining head is connected to the grounding block by a ground wire.

5. The system of claim 2, wherein the dc high voltage generator assembly further comprises a microammeter connected to the bottom current measurement output, wherein the lead of the third arrester is connected to the microammeter, and wherein the microammeter is configured to measure current flowing in the third arrester.

6. The system of claim 2, wherein the second arrestor is suspended adjacent to the pressurized end of the first arrestor such that the lead of the second arrestor is fixed to an insulating rod and the lead of the second arrestor is high.

7. The system for detecting the extra-high voltage transmission line arrester according to claim 2, wherein the direct current high voltage generator in the direct current high voltage generator component is internally provided with a storage battery, and does not need an additional direct current high voltage power supply for supplying power;

the automatic grounding device in the direct-current high-voltage generator assembly is internally provided with a storage battery, and additional power supply is not needed.

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