CN109061358B - Method and system for testing single-phase instantaneous grounding short circuit of power transmission line - Google Patents
Method and system for testing single-phase instantaneous grounding short circuit of power transmission line Download PDFInfo
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Abstract
The application provides a method and a system for testing a single-phase instantaneous grounding short circuit of a power transmission line, wherein the method comprises the steps of firstly determining the position of a test in the power transmission line; then, suspending an auxiliary test short-circuit wire at the test position in an equipotential operation mode to electrify the auxiliary test short-circuit wire; then, a hoisting insulation rope of the test equipment penetrates through the following bucket pulley, and the following bucket pulley is connected to an auxiliary test short circuit wire; therefore, the vertical lead is pulled by the hoisting insulating rope at the ground position until the vertical lead contacts the auxiliary test short-circuit wire, so that the vertical lead is electrified; and drawing the arc-leading line by drawing the insulating rope until the arc-leading line is close to the vertical conducting wire, so that the vertical conducting wire discharges to the arc-leading line. This application is through the equipotential operation mode to lifting by crane the insulating rope and pull the insulating rope and pass through the coaster with test equipment and connect on the test section of waiting to detect the power transmission line, in order to form discharge at perpendicular wire and striking curve, form the short circuit simulation, can implement the short circuit test under the prerequisite that does not have a power failure.
Description
Technical Field
The application relates to the technical field of high voltage electricity, in particular to a method and a system for testing single-phase instantaneous grounding short circuit of a power transmission line.
Background
Series compensation, referred to as series compensation for short, is a technique for performing reactive compensation by connecting reactive compensation devices in series to a line. Before series compensation and direct current engineering are put into operation, debugging work of the power transmission line needs to be carried out, wherein a single-phase instantaneous grounding short circuit test is the most important step in the debugging process. In the existing scheme, develop the short circuit test, need when experimental, have a power failure to the circuit that tests earlier, when having a power failure, hang test device, like the short circuit test frame in experimental position. And then power transmission is recovered, and an earthed arc striking test wire is brought into the short circuit test frame by adopting an ejection device or a bow and crossbow device, so that a single-phase instantaneous earthing short circuit is formed.
However, in practical applications, since both series compensation engineering and direct current engineering are relatively important engineering, the power transmitted by a line is large. If the power of the whole transmission line is cut off when each short circuit test is carried out, the normal operation of other equipment on the line is influenced. In the prior art, when a short-circuit test is performed for normal operation of equipment, a large amount of power supply loads need to be supplied through other lines in a line power failure mode, and then the line power failure can be performed only after complex operation, and long time is needed for line electric energy supply, so that the test efficiency and the normal operation of the line are seriously influenced.
In addition, in the prior art, when manual tests are carried out, the more the load on the power transmission line is, the more the electric energy needs to be transferred, and even if partial load transfer is carried out, the power failure time of the power transmission line is very long. That is, how to avoid power outage when performing a short-circuit test is an urgent technical problem to be solved in the art.
Disclosure of Invention
The application provides a method and a system for testing a single-phase instantaneous grounding short circuit of a power transmission line, and aims to solve the problem that the traditional short circuit testing method needs power failure, so that the testing efficiency and the normal operation of the line are influenced.
On one hand, the application provides a single-phase instantaneous grounding short circuit test method for a power transmission line, which comprises the following steps:
determining a test position for carrying out a single-phase instantaneous grounding short-circuit test in the transmission line;
an equipotential operation mode is adopted, and an auxiliary test short-circuit wire is hung at the test position, so that the auxiliary short-circuit wire is connected with a split conductor of the power transmission line, and the auxiliary test short-circuit wire is electrified;
a hoisting insulation rope of the test equipment penetrates through the following bucket pulley, and the following bucket pulley is connected to the auxiliary test short circuit line on the tower in a ground potential operation mode; the tail end of the hoisting insulating rope extends to the ground;
pulling a vertical lead of the test equipment through the hoisting insulating rope at a ground position until the vertical lead contacts an auxiliary test short-circuit wire, so that the vertical lead is electrified;
and (3) pulling an arc ignition line in the test equipment at a ground position through a pulling insulating rope until the arc ignition line is close to the vertical conducting wire, so that the vertical conducting wire discharges the arc ignition line.
Optionally, an equipotential operation mode is adopted, and before the step of suspending the auxiliary test shorting stub at the test position, the method further includes:
and carrying out winding protection on the power transmission line test section of the test position.
Optionally, in the step of performing winding protection on the power transmission line test section at the test position, an aluminum armor tape is used for winding the power transmission line test section, so that the entire power transmission line test section is covered by the aluminum armor tape, and the winding length of the aluminum armor tape is 30-50 cm.
Optionally, the step of passing a hoisting insulation rope of the test equipment through the heel-and-bucket trolley and connecting the heel-and-bucket trolley to the auxiliary test short-circuit wire on the tower by adopting a ground potential operation mode comprises:
connecting the following bucket pulley to all split conductors of the test position by adopting a soft copper wire or a short wire made of the same material as the power transmission line, wherein the pulley is made of a conductive metal material;
and contacting the vertical conductor with the bucket trolley through the sliding of the hoisting insulating rope in the bucket trolley, so that the vertical conductor is connected with the split conductor through the bucket trolley.
Optionally, the end of the arc line is grounded or connected to the grounding device of the transmission tower, and if the end of the arc line is connected to the grounding device of the transmission tower, the method further comprises:
connecting the tail end of the arc-leading line to the grounding device of the power transmission tower, and testing the potential of the arc-leading line after the arc-leading line is connected to the grounding device of the power transmission tower;
if the electric potential of the arc leading line is zero, connecting the initial end of the arc leading line with the hoisting insulating rope;
and if the electric potential of the arc leading line is not zero, grounding the tail end of the arc leading line or grounding the power transmission tower, and connecting the initial end of the arc leading line with the hoisting insulating rope after the electric potential of the arc leading line is zero.
Optionally, the hoisting insulating rope and the traction insulating rope are connected with a winching mill arranged on the ground, and the method drives the hoisting insulating rope and the traction insulating rope through the winching mill, so that the hoisting insulating rope pulls the vertical wire of the test equipment, and the traction insulating rope pulls the arc-leading line.
On the other hand, this application still provides a transmission line single-phase instantaneous ground short circuit test system, includes:
a test apparatus, comprising: auxiliary test short-circuit wires, vertical wires and arc leading wires; the auxiliary short-circuit wire is used for transmitting the electric potential on the split conductor to the vertical conductor and facilitating suspension and fixation of the following bucket pulley; the vertical conducting wire is used for discharging the arc striking wire;
the auxiliary test short-circuit wire is used for hanging the auxiliary test short-circuit wire at the test position by adopting an equipotential operation mode after the test position of a single-phase instantaneous grounding short-circuit test in the power transmission line is determined, so that the auxiliary short-circuit wire is connected with a split conductor of the power transmission line, and the auxiliary test short-circuit wire is electrified;
the follow bucket pulley is used for enabling a hoisting insulating rope of the test equipment to penetrate through the follow bucket pulley, and the follow bucket pulley is connected to the auxiliary test short circuit line on the tower in a ground potential operation mode; the tail end of the hoisting insulating rope extends to the ground;
the hoisting insulation rope is used for pulling a vertical lead of the test equipment at a ground position through the hoisting insulation rope until the vertical lead contacts an auxiliary test short-circuit wire, so that the vertical lead is electrified;
the traction insulating rope is used for drawing a leading arc line in the test equipment at a ground position through the traction insulating rope until the leading arc line is close to the vertical conducting wire, so that the vertical conducting wire discharges to the leading arc line;
and the protection device is used for implementing winding protection on the test position, and the protection device is an aluminum armor tape wound and coated on the test section of the power transmission line at the test position.
Optionally, the system further comprises a winching mill, wherein the hoisting insulating rope and the traction insulating rope are connected and arranged on the ground, and the winching mill is used for driving the hoisting insulating rope and the traction insulating rope through the winching mill, so that the hoisting insulating rope pulls the vertical wire of the test equipment, and the traction insulating rope pulls the arc-leading line.
According to the technical scheme, the method and the system for the single-phase instantaneous grounding short-circuit test of the power transmission line are characterized in that the test position of the single-phase instantaneous grounding short-circuit test in the power transmission line is determined; then, an equipotential operation mode is adopted, an auxiliary test short-circuit wire is hung at the test position, so that the auxiliary short-circuit wire is connected with the split conductor of the power transmission line, and the auxiliary test short-circuit wire is electrified; then, a hoisting insulation rope of the test equipment penetrates through the following bucket pulley, and the following bucket pulley is connected to an auxiliary test short circuit line on the tower in a ground potential operation mode; the tail end of the hoisting insulating rope extends to the ground; therefore, the vertical lead of the test equipment is pulled by the hoisting insulating rope at the ground position until the vertical lead contacts the auxiliary test short-circuit wire, so that the vertical lead is electrified; and drawing the arc leading line in the test equipment by drawing the insulating rope until the arc leading line is close to the vertical conducting wire, so that the vertical conducting wire discharges to the arc leading line.
This application is through the live working mode, through lifting by crane insulating rope and pull insulating rope and pass through the coaster with test equipment and connect on the test section of waiting to detect the power transmission line to form at perpendicular wire and striking curve and discharge, form the short circuit simulation, the short circuit test can be implemented under the prerequisite that the method does not have a power failure, avoids influencing test efficiency and circuit normal operating because of having a power failure.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic flow chart of a single-phase instantaneous ground short circuit test method of a power transmission line according to the present application;
FIG. 2 is a schematic diagram illustrating a debugging process of the arc introduction line of the present application;
fig. 3 is a schematic structural diagram of a single-phase instantaneous ground short circuit test system of the power transmission line.
Detailed Description
Reference will now be made in detail to embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following examples do not represent all embodiments consistent with the present application. But merely examples of lines and methods consistent with certain aspects of the application, as recited in the claims.
Referring to fig. 1, a schematic flow chart of a single-phase instantaneous ground short circuit test method of a power transmission line is shown. As can be seen from fig. 1, the method for testing the single-phase instantaneous ground short circuit of the power transmission line provided by the present application includes the following steps:
s1: and determining the test position for carrying out the single-phase instantaneous grounding short circuit test in the power transmission line.
In the technical scheme provided by the application, because the short circuit test needs to electrify and discharge the test equipment, and the test equipment needs to be grounded and connected with the power transmission line at the same time, the test position should be positioned closer to the power transmission tower so as to carry out connection and grounding treatment of the test equipment on the power transmission line.
S2: and an equipotential operation mode is adopted, and an auxiliary test short-circuit wire is hung at the test position, so that the auxiliary short-circuit wire is connected with the split conductor of the power transmission line, and the auxiliary test short-circuit wire is electrified.
Due to a plurality of defects on high-voltage live equipment, the indirect operation method is difficult to process. Therefore, an equipotential operation mode can be adopted, so that an operator can enter the electrostatic field of the charged equipment to directly operate, and the potential difference between the human body and the charged body is required to be equal to zero. In the application, for a tension tower or a portal frame in power transmission equipment, an equipotential operator can enter a power transmission line test section area through an insulating flat ladder; and when the power transmission equipment is used for a tangent tower, the equipotential operating personnel can enter a power transmission line test section area through the insulating rope ladder.
S3: a hoisting insulation rope of the test equipment penetrates through the following bucket pulley, and the following bucket pulley is connected to the auxiliary test short circuit line on the tower in a ground potential operation mode; the tail end of the hoisting insulating rope extends to the ground.
In the technical scheme of this application, the coaster can be with fill coaster or with the first coaster of following that uses in high voltage transmission line, be equipped with on the coaster and be used for passing the rounding off hole that lifts by crane the insulated wire, make to lift by crane insulating rope can be in smooth and easy slip and redirecting in the rounding off hole. The trolley can also be used for conducting electricity, i.e. transferring the voltage in the transmission line to the test equipment. The hoisting insulating rope needs to be made of a material with better insulating property and has good flexibility and tensile strength. In this application, also can install the coaster on the transmission line through the earth potential operation personnel earlier, will lift by crane the smooth hole that insulating rope passed the coaster middle part again to make the end of lifting by crane insulating rope set up subaerial, so that the operation is pull in the follow-up, adopt the earth potential can also reduce the installation risk.
Further, connecting the pulley to all split conductors of the power transmission line test section by adopting soft copper wires, wherein the pulley is made of a metal material capable of conducting electricity; and contacting the vertical conductor to the trolley by sliding the hoisting insulation rope in the trolley so that the vertical conductor is connected with the split conductor through the trolley.
When the tackle is used for testing, the gravity for hoisting the insulating rope and the testing equipment needs to be borne, and the stress generated when the hoisting insulating rope is repeatedly pulled can cause damage to the power transmission line or damage to the coating on the surface of the power transmission line. In order to prevent the detection process from damaging the transmission line or the coating on the surface of the transmission line, before installing the pulley, certain protective measures can be taken on the transmission line, that is, in some embodiments of the present application, before the step of conducting a short-circuit test section of the transmission line in the test position located according to the equipotential operation mode, the method further includes: and carrying out winding protection on the power transmission line test section.
Further, in the step of performing winding protection on the power transmission line test section, an aluminum armor tape is adopted to wind the power transmission line test section, so that the whole power transmission line test section is covered by the aluminum armor tape, and the winding length of the aluminum armor tape is 30-50 cm. In this embodiment, use aluminium armour tape to carry out the winding protection to the transmission line test section, not only can avoid the testing process to cause the damage to the transmission line surface, can cushion moreover being connected between coaster and the transmission line, make the coaster at subsequent traction and lift by crane insulating rope in-process, the coaster is in stable position to perpendicular wire can be stable contact to the split conductor.
S4: and pulling the vertical lead of the test equipment through the hoisting insulating rope at the ground position until the vertical lead contacts the auxiliary test short-circuit wire, so that the vertical lead is electrified.
In the technical scheme provided by the application, the test equipment can comprise a section area exceeding 50mm2With a transparent outer sheath. After the vertical conductor is contacted with the split conductor or is contacted with the split conductor through the pulley, the charges in the power transmission line can be transferred into the vertical conductor, so that the vertical conductor is also electrified, and the discharge can be generated through the voltage difference during the subsequent short-circuit test.
S5: and (3) pulling an arc ignition line in the test equipment at a ground position through a pulling insulating rope until the arc ignition line is close to the vertical conducting wire, so that the vertical conducting wire discharges the arc ignition line.
In this application, the arc striking line is close to perpendicular wire means, through the traction of lifting by crane insulating rope, makes the one end of arc striking line be close to perpendicular wire gradually, because the other end ground connection of arc striking line, consequently, the arc striking line can keep zero potential, and when the distance that the arc striking line is close to perpendicular wire was less than the overvoltage requirement, the air between arc striking line and the perpendicular wire will be punctured and form and discharge to along with shortening of distance and more violent, thereby satisfy the short circuit test requirement.
Specifically, in the step of pulling an arc ignition line in the test equipment through the pulling insulation rope at a ground position until the arc ignition line is close to the vertical lead to discharge the vertical lead, the distance between the arc ignition line and the vertical lead is less than or equal to the distance requirement of the operation overvoltage; and the distance of the arc of lead wire close to the vertical wire is greater than or equal to the safe distance for ground operation. The safety distance may take different values depending on the actual environment and the power transmission equipment.
Illustratively, when the short-circuit location is below 1000m in altitude, typically the distance of 220kV is 3m, 330kV is 4m, the length of 500kV is 5m, the distance of 750kV is 8m, the distance of 1000kV is 9.5m, the distance of ± 500kV is 6.8m, the distance of ± 660kV is 9.0m, the distance of ± 800kV is 10.1m, and when the short-circuit location is at high voltage of 1000m in altitude, an altitude factor correction should be performed.
In some embodiments of the present application, as shown in fig. 2, the end of the arc lead connects to ground or to the grounding device of the transmission tower, and if the end of the arc lead connects to the grounding device of the transmission tower, the method further comprises:
s501: connecting the tail end of the arc-leading line to the grounding device of the power transmission tower, and testing the potential of the arc-leading line after the arc-leading line is connected to the grounding device of the power transmission tower;
s502: if the electric potential of the arc leading line is zero, connecting the initial end of the arc leading line with the hoisting insulating rope;
s503: and if the electric potential of the arc leading line is not zero, grounding the tail end of the arc leading line or grounding the power transmission tower, and connecting the initial end of the arc leading line with the hoisting insulating rope after the electric potential of the arc leading line is zero.
In addition, in order to ensure the overall safety and make the traction process more stable and controllable in the process of drawing the vertical lead or the arc line by the hoisting insulating rope, in some embodiments of the application, the hoisting insulating rope is connected with a winching device arranged on the ground, and the method drives the hoisting insulating rope to draw the vertical lead and the arc line of the test equipment through the winching device.
Based on the above method, the present application further provides a power transmission line single-phase instantaneous ground short circuit test system, as shown in fig. 3, the system includes:
a test apparatus, comprising: auxiliary test shorting bars 11, vertical wires 12, and lead arcs 13; wherein the auxiliary shorting stub 11 is used for transmitting the potential on the split conductor 0 to the vertical conductor 12; the vertical conductor 12 is used for discharging the arc-leading line 13;
the auxiliary test short-circuit wire 11 is used for hanging the auxiliary test short-circuit wire 11 at a test position by adopting an equipotential operation mode after the test position of a single-phase instantaneous grounding short-circuit test in the power transmission line is determined, so that the auxiliary test short-circuit wire 11 is connected with the split conductor 0 of the power transmission line, and further the auxiliary test short-circuit wire 11 is electrified;
the following bucket pulley 2 is used for enabling a hoisting insulating rope 31 of the test equipment to penetrate through the following bucket pulley, and the following bucket pulley 2 is connected to the auxiliary test short-circuit wire 11 on the tower in a ground potential operation mode; the tail end of the hoisting insulating rope 31 extends to the ground;
the hoisting insulating rope 31 is used for pulling the vertical lead of the test equipment through the hoisting insulating rope 31 at a ground position until the vertical lead 12 contacts the auxiliary test short-circuit wire 11 so as to electrify the vertical lead;
a traction insulating rope 32 for drawing the arc ignition wire 13 in the test equipment through the traction insulating rope 32 at a ground position until the arc ignition wire 13 is close to the vertical wire 12, so that the vertical wire 12 discharges the arc ignition wire 13;
and the protection device 4 is used for implementing winding protection on the test position, and the protection device 4 is an aluminum armor tape wound and coated on the test section of the power transmission line at the test position.
Further, the system further comprises a winching device 5, wherein the hoisting insulating rope 31 and the traction insulating rope 32 are connected with the winching device 5 arranged on the ground, and are used for driving the hoisting insulating rope 31 and the traction insulating rope 32 through the winching device 5, so that the hoisting insulating rope 31 can pull the vertical lead 12 of the test equipment, and the traction insulating rope 31 can pull the arc guiding line 13.
Further, the system further comprises a fixing insulating rope 33 arranged at the bottom end of the vertical conductor 12, wherein the fixing insulating rope 33 is used for fixing the position of the vertical conductor 12; the system also comprises a U-shaped ring connected with the following bucket pulley 2 and a grounding metal pulley 6 which are respectively used for connecting a hoisting insulating rope 31 and a traction insulating rope 32, wherein the U-shaped ring connected with the hoisting insulating rope 31 has the function of preventing the vertical conductor 12 from being pulled through the following bucket pulley 2 when being hoisted besides the traction function; the grounded metal block 6 can protect the operator or the winching 5.
According to the technical scheme, the method and the system for the single-phase instantaneous grounding short-circuit test of the power transmission line are characterized in that the test position of the single-phase instantaneous grounding short-circuit test in the power transmission line is determined; then, an equipotential operation mode is adopted, an auxiliary test short-circuit wire is hung at the test position, so that the auxiliary short-circuit wire is connected with the split conductor of the power transmission line, and the auxiliary test short-circuit wire is electrified; then, a hoisting insulation rope of the test equipment penetrates through the following bucket pulley, and the following bucket pulley is connected to an auxiliary test short-circuit line on the tower in an equipotential operation mode; the tail end of the hoisting insulating rope extends to the ground; therefore, the vertical lead of the test equipment is pulled by the hoisting insulating rope at the ground position until the vertical lead contacts the auxiliary test short-circuit wire, so that the vertical lead is electrified; and drawing the arc leading line in the test equipment by drawing the insulating rope until the arc leading line is close to the vertical conducting wire, so that the vertical conducting wire discharges to the arc leading line.
This application is through the live working mode, through lifting by crane insulating rope and pull insulating rope and pass through the coaster with test equipment and connect on the test section of waiting to detect the power transmission line to form at perpendicular wire and striking curve and discharge, form the short circuit simulation, the short circuit test can be implemented under the prerequisite that the method does not have a power failure, avoids influencing test efficiency and circuit normal operating because of having a power failure.
The embodiments provided in the present application are only a few examples of the general concept of the present application, and do not limit the scope of the present application. Any other embodiments extended according to the scheme of the present application without inventive efforts will be within the scope of protection of the present application for a person skilled in the art.
Claims (5)
1. A single-phase instantaneous grounding short circuit test method of a power transmission line is characterized by comprising the following steps:
determining the test position of test equipment in a single-phase instantaneous grounding short circuit test in a power transmission line; the test equipment is simultaneously grounded and connected with a power transmission line; the test equipment is high-voltage live equipment; the test position is convenient for live working;
an equipotential operation mode is adopted, and an auxiliary test short-circuit wire is hung at the test position, so that the auxiliary short-circuit wire is connected with a split conductor of the power transmission line, and the auxiliary test short-circuit wire is electrified;
a hoisting insulation rope of the test equipment penetrates through the following bucket pulley, and the following bucket pulley is connected to the auxiliary test short circuit line on the tower in a ground potential operation mode; the tail end of the hoisting insulating rope extends to the ground;
pulling a vertical lead of the test equipment through the hoisting insulating rope at a ground position until the vertical lead contacts an auxiliary test short-circuit wire, so that the vertical lead is electrified;
pulling an arc striking wire of the test equipment at a ground position through a traction insulating rope until the arc striking wire is close to the vertical conducting wire, so that the vertical conducting wire discharges to the arc striking wire; the end of the lead arc line is grounded or connected to the transmission tower grounding device, and if the end of the lead arc line is connected to the transmission tower grounding device, the method further comprises: connecting the tail end of the arc-leading line to the grounding device of the power transmission tower, and testing the potential of the arc-leading line after the arc-leading line is connected to the grounding device of the power transmission tower;
if the electric potential of the arc leading line is zero, connecting the initial end of the arc leading line with the traction insulating rope;
grounding the end of the arc lead line or grounding the transmission tower if the potential of the arc lead line is not zero, and connecting the initial end of the arc lead line to the traction insulating rope after the potential of the arc lead line is zero; wherein the distance of the arc of approach to the vertical conductor is less than or equal to the distance requirement for operating overvoltage; and the distance of the arc of lead wire close to the vertical wire is greater than or equal to the safe distance for ground operation.
2. The method for testing the single-phase instantaneous grounding short circuit of the power transmission line according to claim 1, wherein an equipotential operation mode is adopted, and before the step of hanging an auxiliary test short circuit wire at the test position, the method further comprises the following steps: and carrying out winding protection on the power transmission line at the test position.
3. The method for testing the single-phase instantaneous ground short circuit of the power transmission line according to claim 2, wherein in the step of protecting the power transmission line at the test position by winding, the test section of the power transmission line is wound by using an aluminum tape, so that the whole test section of the power transmission line is covered by the aluminum tape, and the winding length of the aluminum tape is 30-50 cm.
4. The method for testing the single-phase instantaneous grounding short circuit of the power transmission line according to claim 1, wherein the step of enabling a hoisting insulating rope of the testing equipment to penetrate through a bucket trolley and connecting the bucket trolley to the auxiliary testing short circuit wire on a tower in a ground potential operation mode comprises the following steps: connecting the following bucket pulley to all split conductors of the test position by adopting a soft copper wire or a short-circuit wire made of the same material as the power transmission line, wherein the following bucket pulley is made of a conductive metal material;
and contacting the vertical conductor with the bucket trolley through the sliding of the hoisting insulating rope in the bucket trolley, so that the vertical conductor is connected with the split conductor through the bucket trolley.
5. The test method of the single-phase instantaneous ground short circuit of the transmission line of claim 1, characterized in that the hoisting insulating rope and the traction insulating rope are connected with a winching machine arranged on the ground, and the method drives the hoisting insulating rope and the traction insulating rope through the winching machine, so that the hoisting insulating rope pulls a vertical wire of the test equipment and the traction insulating rope pulls the arc-leading line.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811244566.3A CN109061358B (en) | 2018-10-24 | 2018-10-24 | Method and system for testing single-phase instantaneous grounding short circuit of power transmission line |
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| CN201811244566.3A CN109061358B (en) | 2018-10-24 | 2018-10-24 | Method and system for testing single-phase instantaneous grounding short circuit of power transmission line |
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| CN109061358B true CN109061358B (en) | 2021-10-26 |
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| CN111426916B (en) * | 2020-05-14 | 2021-06-25 | 昆明理工大学 | Grounding electrode line fault simulation method and system |
| CN111766535B (en) * | 2020-06-16 | 2022-07-19 | 华北电力大学（保定） | Stator winding dynamic turn-to-turn short circuit simulation method and device |
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| CN104049158A (en) * | 2014-05-13 | 2014-09-17 | 国家电网公司 | Single-phase instant artificial grounding short-circuit test system for power transmission line |
| CN107478958A (en) * | 2017-09-07 | 2017-12-15 | 国家电网公司 | A kind of method for identifying distribution line short circuit permanent fault and transient fault of being discharged using capacitor energy storage |
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