CN101521363B - Protecting method, device and system for electric power pylon - Google Patents
Protecting method, device and system for electric power pylon Download PDFInfo
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Abstract
The invention provides a protecting method, a device and a system for an electric power pylon. A power line is hung and connected with the electric power pylon, and the method comprises the following steps: the stretching force of the power line to the electric power pylon is sensed in real time; if the stretching force of the power line to the electric power pylon reaches a set threshold value, the power line drops off the electric power pylon. In the technical scheme, when the power line is overloaded seriously and the safety of the electric power pylon is in danger, the overloaded power line is ensured to automatically drop off the electric power pylon so as to reduce the stretching force to the electric power pylon, the safety of the electric power pylon is protected, the loss scope isshortened, and the maintenance cycle and the maintenance cost of the power line are greatly reduced.
Description
Technical Field
The invention relates to the field of power emergency protection, in particular to a method, a device and a system for protecting a power transmission line tower.
Background
In winter, when the temperature is below 0 ℃, ice coating can be generated on a transmission line or a tower due to precipitation or snow fall. The ice coating of the power transmission line seriously threatens the safe operation of a power grid, the power grid accident result caused by the ice coating is very serious, if the ice coating is light, the insulator string is repeatedly tripped by ice flash, and the conductor galloping is caused by ice removal jumping to cause interphase short circuit; the heavy cause is that the gold utensil seriously damages and the brittle failure ground connection of wire, shaft tower slope even collapse etc.. The damage caused by tower collapse accidents is the largest, and the indirect loss caused by the tower is immeasurable due to the fact that the tower recovery difficulty is extremely high and the period is long. At present, no mature technology and equipment for wire deicing exist in China, so that once the power transmission line is seriously iced and emergency repair personnel cannot timely get rid of dangerous situations, the safety of the tower is directly damaged.
China is one of the most serious areas of ice coating of the transmission line, and the probability of the ice damage accident of the transmission line is in the front of the world. In the spring festival of 2008, in areas such as Hunan, Hubei, Anhui, Guizhou and the like, due to continuous large-scale freezing rain weather, the most serious ice disaster occurs in the areas for 50 years, the power transmission lines are covered with ice in a large area, 11 500Kv main line inverted towers and broken lines exist in one province of Hunan, power facilities are destructively damaged, and the direct economic loss exceeds billion yuan. Hundreds of power supply lines are paralyzed, which affects the production and life of people for months, and the indirect economic loss is difficult to estimate.
In the prior art, the overload load resistance of a line is improved by enhancing the strength of a tower and an insulator string, so that the tower collapse accident is avoided. At present, the line design is designed according to the meteorological conditions of 30-50 years, the icing, the galloping and other reasons can cause the overloading of the wire, and the existing line can theoretically bear the icing load of the wire of more than 10 mm. However, when special meteorological conditions are met (for example, in 2008, large area of continuous freezing rain, the ice coating of the lead is more than 20 mm), the tower collapse accident can occur due to overload.
The utility model patent of the grant publication number CN 2401647Y, entitled "prestressed power transmission line tower" provides a novel power transmission tower structure, and this structure adjusts and strengthens the atress condition and the bulk stiffness of power transmission tower through adopting the prestressing force cable. This patent is incorporated herein as prior art to the present invention. However, in the method for preventing the tower from collapsing by measures such as improving the design grade, improving the tower structure, improving the tower strength and the like, because corresponding overload protection means are not provided, the collapse accidents of the tower can only be reduced but cannot be avoided, so that the problem cannot be fundamentally solved.
Disclosure of Invention
One of the objectives of the present invention is to provide a method for protecting a tower by sacrificing a transmission line when the transmission line is heavily overloaded and there is a risk of tower collapse.
In order to achieve the above object, an embodiment of the present invention provides a method for protecting a power transmission tower, where a power transmission line is suspended and connected to the power transmission tower, and the method includes the following steps: sensing the tension of the power transmission line on the power transmission line tower in real time; and if the pulling force of the power transmission line on the power transmission line tower reaches a set threshold value, enabling the power transmission line to fall off.
The invention also aims to provide a power transmission tower protection system, which adopts a stress fracture device to sense the tension of a power transmission line on the power transmission tower in real time, and the stress fracture device fractures to make the power transmission line fall off to protect the power transmission tower when the power transmission line is overloaded.
To achieve the above object, an embodiment of the present invention provides a power tower protection system, where the system includes: the power transmission tower is connected with the power transmission line in a hanging manner; the system further comprises: the stress rupture device is used for connecting the power transmission line tower with the power transmission line in a hanging way; the stress fracture device is used for sensing the tensile force of the power transmission line to the power transmission line tower in real time, and if the tensile force of the power transmission line to the power transmission line tower reaches a set threshold value, the power transmission line is made to fall off.
The invention also aims to provide a power transmission tower protection device, which adopts a stress fracture device to induce the tension of a power transmission line to a power transmission tower, and the stress fracture device fractures to enable the power transmission line to fall off to protect the power transmission tower when the power transmission line is overloaded.
To achieve the above object, an embodiment of the present invention provides a power tower protection device, where the device includes: the stress fracture device is used for sensing the tension of a power transmission line to the power transmission line tower in real time, and enabling the power transmission line to fall off if the tension of the power transmission line to the power transmission line tower reaches a set threshold value; and the damping device is used for enabling the power transmission line falling from the power transmission line tower to slowly fall.
According to the technical scheme, when the iron tower is endangered by serious overload of the transmission line, the overload transmission line is actively disconnected so as to relieve the tension on the iron tower, the iron tower is protected, the loss range is reduced, and the maintenance period and the maintenance cost of the transmission line are greatly reduced.
Drawings
Fig. 1 is one of the schematic diagrams of a power tower protection system according to embodiment 1 of the present invention;
fig. 2 is a second schematic diagram of a power tower protection system according to embodiment 1 of the present invention;
FIG. 3 is a view showing the actual position of the cleavage apparatus in embodiment 1 of the present invention;
FIG. 4 is a schematic block diagram of the cracking device shown in FIG. 2;
fig. 5 is a third schematic diagram of a power tower protection system according to embodiment 1 of the present invention;
fig. 6 is a fourth schematic diagram of a power tower protection system according to embodiment 1 of the present invention;
fig. 7 is a block diagram of a buffer protection device according to embodiment 1 of the present invention;
fig. 8 is a schematic view of a power transmission line dropped in embodiment 1 of the present invention sliding to the ground through a buffer protection device;
fig. 9 is a schematic view of the cracking device of embodiment 1 of the present invention applied to a strain tower;
fig. 10 is a flow chart of an implementation of a method for tower protection in accordance with embodiment 1 of the present invention;
fig. 11 is a structural view of a breaking device mounted on a power transmission line according to embodiment 2 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the following embodiments and accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.
Example 1:
the embodiment provides a method, a device and a system for protecting a power tower. In order to avoid collapse accidents of the power transmission line tower caused by large tension of the power transmission line on the power transmission line tower, the embodiment adopts an overload protection method for the power transmission line tower, and when the tension of the power transmission line on the power transmission line tower exceeds a set threshold, the power transmission line falls off to relieve pressure on the iron tower, so that the iron tower is prevented from collapsing. The tension of the transmission line to the transmission line tower comprises the gravity of the transmission line and tension increased by other external factors, such as ice coating or wind power.
Due to different structures of each power line tower, the design load and the breaking load are different, generally, the breaking load is about 120% of the design load, and if the set load is 1 ton, the breaking load is about 1.2 tons. A set threshold value for the pull of the transmission line to the tower is related to the breaking load, which in this embodiment cannot exceed 90-95% of the breaking load.
Fig. 1 is a schematic diagram of a power tower protection system according to the present embodiment. As shown, the system includes a cleaving device 20 that connects the power tower insulator string 10 with the power line 30. The breaking device 20 includes a stress rupture means 201 for sensing a pulling force of the power line 30 on the power line tower, and if the pulling force reaches a predetermined threshold, the stress rupture means 201 itself breaks to disconnect the power line 30 from the power line tower, so that the power line 30 falls off. In another connection relationship, the breaking device 20 may be located on the upper portion (not shown) of the insulator string 10, and other connection manners that the breaking of the stress rupture unit 201 to separate the power line 30 are within the protection scope of the present invention.
Fig. 2 is a second schematic diagram of the power tower protection system of the present embodiment. In order to enable the electric power department to know the alarm information of the power transmission line disconnection in time, the device 20 further includes a disconnection alarm unit 202 connected to the stress rupture device 201, and configured to detect the disconnection of the stress rupture device 201, generate a disconnection alarm signal including position information, and wirelessly transmit the disconnection alarm signal, where the alarm signal may further include time information of the disconnection, and the like. In order to avoid that a broken power line will cause too much impact on the crossarm of the tower below it when it falls, the breaking device 20 further comprises a damping means 203 along which the power line 30 leaving the tower falls to reduce its velocity when it falls, a typical damper being a slide wire damper. In addition, the cracking device 20 may further include a force sensor for detecting the tension of the power transmission line on the power transmission line tower in real time, generating a tension alarm signal containing position information, and wirelessly transmitting the tension alarm signal, so that the worker can know the tension of the power transmission line on the power transmission line tower in time, and can take corresponding measures before the power transmission line falls off.
Fig. 3 is a diagram of an actual position of the present system cracking device 20. The cracking device 20 is connected in series with the lower part of the insulator string or the upper part of the insulator string, and power is supplied by adopting a solar energy or high-voltage energy extraction mode, so that the problem of long-term power supply of the device can be solved. The device is composed of high-reliability components, has small structural size and cannot influence the safety margin of a circuit.
Fig. 4 is a schematic diagram of the cracking device 20 shown in fig. 2. The cleaving device 20 comprises a stress rupture device 201, a cleave alarm unit 202, a damping device 303 and a force sensor 204 in the protection of the dust proof housing. As shown in fig. 4, the stress rupture device 201 adopts a special mechanical structure, which has a maximum load-bearing capacity, and when the power transmission line is heavily overloaded and exceeds a set threshold, the stress rupture device 201 is ruptured in advance, so that the overloaded power transmission line is actively separated from the suspended power transmission line tower, thereby reducing the load for the tower. The structure shown in fig. 4 is for illustration only, and is not intended to limit the structure of the stress rupture device 201. The cracking alarm unit 202 is a device capable of performing wireless transmission, and is connected to the stress cracking device 201, converts cracking of the stress cracking device into changes of corresponding electrical signals, and generates alarm signals to be transmitted to the remote monitoring device. The damping device 203 in fig. 4 adopts slide wire damping, utilizes the damping wire to decelerate the falling of the power transmission line in the falling process of the power transmission line, and the damping wire is broken after the power transmission line falls to a certain height, so that the impact force generated when the power transmission line falls is effectively relieved. The force sensor 204 detects the tension of the current power transmission line on the power transmission line tower in real time, generates a tension alarm signal and sends the tension alarm signal to the remote monitoring equipment.
Fig. 5 is a third schematic diagram of the power tower protection system of the present embodiment. The system comprises a cleaving apparatus 20, a base station 40 and a remote monitoring device 50. Since the splitting apparatus 20 is generally powered by a battery, in order to save power and generally not use high power for data transmission, the system of fig. 5 is additionally provided with a base station 40 to receive a signal wirelessly transmitted by the splitting apparatus 20, in this embodiment, the splitting apparatus 20 is connected to the base station 40 through a wireless sensor network, and the base station 40 transmits the splitting alarm signal or the tension alarm signal of the power transmission line to the remote monitoring device 50 through a mobile network (such as GPRS, CDMA, etc.). The chinese patent application with the application number of 200510115588.6 entitled "overhead power transmission line on-line monitoring system and method" discloses a method for on-line monitoring of a power transmission line, which is incorporated herein as the prior art of the data transmission and remote monitoring technology of the present invention.
Because the types of the power transmission line towers are numerous and the power transmission lines are arranged in different ways, the disconnected power transmission lines can not directly fall to the ground but fall to the cross arm at the lower part of the phase power transmission line in most cases, and even if the damping device 203 in the cracking device 20 decelerates the power transmission lines, the power transmission lines still impact the lower cross arm. This embodiment falls to strike the department at lower part cross arm power transmission line and sets up the non-metallic material that has certain shock resistance and protect the tower material as the buffer, has further reduced the impact force to the cross arm, and the wire that drops simultaneously also can fall along this protective material's direction of direction, can not assault the lower part cross arm once more. If the tower is of a tower type such as a cat-head tower or a wine glass tower, the lead cannot fall to the ground completely, and the tower material at the falling point of the lead is protected by arranging the protective material.
Fig. 6 is a fourth schematic diagram of the power tower protection system of the present embodiment. As shown, the system includes not only the cleaving apparatus 20, but also a buffer protection apparatus 60. The buffer protection device is located at the contact part of the power line 30 with the power tower after it has fallen, and the buffer protection device in fig. 6 is located on the cross arm at the lower part of the breaking device 20. Fig. 7 is a block diagram of a buffer protection device, the buffer protection device 60 including: the buffer 601 buffers the power transmission line that has fallen off to reduce the impact on the contact portion when the power transmission line falls off. The slide rail 602 is connected to the buffer 601, so that the dropped power line slides along the slide rail to the ground. Figure 8 is a schematic view of a dropped transmission line sliding to the ground through a buffer protection 60.
A fifth power tower protection system of the present embodiment may be a combination of fig. 5 and fig. 6, and is not further illustrated herein. The system comprises a defragmentation device 20, a base station 40, a telemonitoring apparatus 50 and a buffer protection device 60. For the tension tower, the assumed power transmission line has initial tension, and once the power transmission line falls off, the power transmission line does not impact the lower tower under the influence of the tension and the gravity of the power transmission line, so the tension tower does not need to comprise the buffer protection device 60, and the cracking device does not need to comprise the damper 203. Fig. 9 is a schematic view of the cracking device 20 applied to a strain tower.
Fig. 10 is a flowchart of an implementation of the power tower protection method according to the embodiment. As shown in the figure:
step S101, a force sensor collects tension of a power transmission line to a power transmission line tower in real time, generates a tension alarm signal and wirelessly transmits the tension alarm signal to remote monitoring equipment so as to early warn the load state of the power transmission line;
step S102, the stress rupture device induces the tension of the power transmission line on the power transmission line tower in real time, and when the tension exceeds a set threshold, the step S103 is carried out;
step S103, the stress fracture device fractures to disconnect the power transmission line from the power transmission line tower, the power transmission line falls off, and the process goes to step S104 and step S107;
step S104, the slide wire damping is that the falling speed of the power transmission line is reduced, the damping wire is broken after the power transmission line falls to a certain height, and the impact force on other parts of the power transmission tower when the power transmission line falls is effectively relieved;
step S105, after the transmission line falls, arranging a buffer at a contact part (such as a lower cross arm or other part) of the transmission line tower so as to reduce the impact of the falling transmission line on the contact part;
step S106, arranging a slide rail near the buffer, or enabling the buffer to comprise the slide rail, and enabling the falling power transmission line to slide to the ground through the slide rail;
step S107, when the stress fracture device fractures to disconnect the power transmission line and the power transmission line tower, the fracture alarm unit wirelessly sends alarm information, and the alarm information at least comprises the position where the power transmission line falls off;
step S108, the base station receives the alarm information and forwards the alarm information to the remote monitoring equipment through the mobile network;
step S109, the remote monitoring equipment monitors the working state of the protection system, obtains alarm information and the load of the transmission line, and carries out emergency repair processing in time.
By adopting the technical scheme of the embodiment, the following technical effects can be realized:
1. when the iron tower safety is endangered by serious overload of the transmission line, the overload transmission line is actively separated from the tower, the iron tower safety is protected, the loss range is reduced, and the maintenance period and the maintenance cost of the transmission line are greatly reduced.
2. The change of the load of the power transmission line can be remotely monitored on line in real time, early warning information is sent to an operation department in time, the power transmission line is separated from a tower and sends information to the operation department after the load exceeds a threshold value, and operation personnel are helped to perform power failure treatment and organize emergency repair.
3. The system has small influence on the original power transmission line tower structure, is simple and convenient to install and has high reliability.
4. The system has multiple buffer devices, and can reduce the falling speed of the transmission line when the transmission line is separated from the tower and reduce the impact force on the lower cross arm of the transmission line so as to reduce the incidental loss.
5. The position of the overload and fracture iron tower can be rapidly determined through the alarm signal sent by the system, and the emergency repair personnel can find out the fault point conveniently.
Example 2:
this embodiment also protects the power line tower by sacrificing power lines. Unlike embodiment 1, in this embodiment, the stress rupture device 201 is mounted on the power transmission line, and when the load of the power transmission line exceeds the allowable maximum value, the stress rupture device 201 is ruptured to disconnect and drop off the overloaded power transmission line 30 to reduce the power tower load.
Fig. 11 is a structural view of the stress rupture device 201 mounted on a power line. As shown, power line 30 includes aluminum conductor steel reinforced 301, aluminum jacket 302, and steel core 303. The steel-cored aluminum strand 301 bears stress by virtue of the steel core 303, and the steel-cored aluminum strand 301 carries out power transmission. The stress rupture device 201 is mounted on the steel core 303 of the transmission line 30. The transmission line 30 is reconnected after being cut and the aluminum jacket 302 for power transmission is re-wrapped after the stress rupture device 201 is installed.
In this embodiment, after the power transmission line 30 is broken, no other tower structure is arranged at the lower part, and the installation condition of the connection part of the steel-reinforced aluminum stranded wire is limited, so that the damping device 203 does not need to be designed, and the buffer protection device 60 does not need to be designed in the system. In addition, the force sensor 204 and the crack alarm unit 202 are not included in the implementation force due to the large current interference when power is transmitted on the power transmission line. The working process of the scheme is as follows:
step 1, a transmission line is overloaded seriously and exceeds the designed bearing capacity of an iron tower;
step 2, breaking the breaking device, breaking the transmission line and reducing the load of the tower;
step 3, the control center trips to alarm due to power transmission interruption;
and 4, operating personnel perform line patrol on the power-off line, find the breakpoint and organize emergency repair.
The structure of the scheme is very simple, and the reconnection speed of the power transmission line is high. But a manual line patrol is required to find the breakpoint.
The power transmission line tower protection system is designed for reducing the harm of the serious overload of the line to the tower, and can ensure that the overload power transmission line can be actively separated from the suspended tower when the power transmission line is seriously overloaded (such as icing) and exceeds the designed bearing capacity of the iron tower. And the impact force of the conductor when falling is reduced by using the damper and the buffer device of the system, so as to protect the safety of the tower and reduce the subsequent loss. Meanwhile, the system also has an alarm function and can send power transmission line falling and position signals to an operation department so as to assist line conveying and subsequent line first-aid repair.
The system and the method not only can provide real-time ice coating load data and early warning information of the line for an operation department, but also can timely separate the wire from the iron tower when the wire is overloaded and rush repair personnel cannot reach the site, thereby ensuring the safety of the iron tower and reducing the loss to the minimum. The power supply system has very important function on safe and reliable power supply of the power system, and can bring great economic and social benefits to the power system.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (17)
1. A method of tower protection for a power transmission line having a power transmission line suspended from the tower, the method comprising the steps of:
sensing the tension of the power transmission line on the power transmission line tower in real time;
and if the pulling force of the power transmission line on the power transmission line tower reaches a set threshold value, enabling the power transmission line to fall off.
2. The method of claim 1, wherein said hanging a connecting power line from a power line tower comprises: the power transmission line tower is connected with the power transmission line in a hanging manner through a stress fracture device; wherein,
the stress rupture device senses the tension of the power transmission line to the power transmission line tower in real time, and if the tension of the power transmission line to the power transmission line tower reaches a set threshold value, the stress rupture device is cracked, so that the power transmission line falls off from the power transmission line tower.
3. The method of claim 1, wherein a stress rupture device is disposed in a load bearing steel core within said transmission line, said stress rupture device sensing in real time a pulling force of said transmission line on said transmission line tower; and if the pulling force of the power transmission line on the power transmission line tower reaches a set threshold value, the stress fracture device is cracked, so that the power transmission line is disconnected and falls off the ground.
4. The method of claim 2, further comprising: the transmission line falling off from the transmission line tower falls through the damping device.
5. The method of claim 2, further comprising:
and detecting the crack of the stress fracture device, generating a crack alarm signal containing position information, and wirelessly transmitting the crack alarm signal.
6. The method of claim 2, further comprising:
and detecting the tension of the power transmission line on the power transmission line tower in real time, generating a tension alarm signal containing position information, and wirelessly transmitting the tension alarm signal.
7. The method of claim 4, further comprising: and a buffer protection device and a slide rail are arranged on the support steel beam at the lower part of the power transmission line tower, so that the power transmission line slides to the ground along the slide rail after falling down through the damping device and the buffer protection device.
8. A power tower protection system, said system comprising: the power transmission tower is connected with the power transmission line in a hanging manner; characterized in that the system further comprises:
the stress rupture device is used for connecting the power transmission line tower with the power transmission line in a hanging way;
the stress fracture device is used for sensing the tensile force of the power transmission line to the power transmission line tower in real time, and if the tensile force of the power transmission line to the power transmission line tower reaches a set threshold value, the power transmission line is made to fall off.
9. The system of claim 8, further comprising: an insulator string;
the power transmission line tower is connected with the insulator string, the insulator string is connected with the stress fracture device, and the stress fracture device is connected with the power transmission line in a hanging manner; or
The power transmission line tower is connected with the stress fracture device, the stress fracture device is connected with the insulator string, and the insulator string is connected with the power transmission line in a hanging mode.
10. The system of claim 8, further comprising:
and the damping device is used for enabling the power transmission line falling from the power transmission line tower to slowly fall.
11. The system of claim 8, further comprising:
and the cracking alarm unit is used for detecting the cracking of the stress cracking device, generating a cracking alarm signal containing position information and wirelessly transmitting the cracking alarm signal.
12. The system of claim 8, further comprising:
and the force sensor is used for detecting the tension of the power transmission line on the power transmission line tower in real time, generating a tension alarm signal containing position information and wirelessly transmitting the tension alarm signal.
13. The system of claim 11, further comprising a base station and a remote monitoring device,
the base station is connected with the cracking alarm unit through a wireless sensor network, receives information wirelessly sent by the cracking alarm unit and sends the information to the remote monitoring equipment;
and the remote monitoring equipment is connected with the base station through a mobile network, receives the information forwarded by the base station and monitors the working state of the system.
14. The system of claim 10, further comprising:
the buffer device is positioned on the supporting steel beam at the lower part of the power transmission line tower, so that the power transmission line falls down through the damping device and the buffer protection device;
and the sliding rail is positioned on the supporting steel beam at the lower part of the power transmission line tower, so that the falling power transmission line slides to the ground.
15. A power tower protection system, said system comprising: a power line tower, a power line and an insulator string; the power transmission line tower is connected with the insulator string, and the insulator string is connected with the power transmission line in a hanging manner; characterized in that the system further comprises:
a stress rupture device disposed in a load bearing steel core within said transmission line;
the stress fracture device is used for sensing the tensile force of the power transmission line to the power transmission line tower in real time, and if the tensile force of the power transmission line to the power transmission line tower reaches a set threshold value, the stress fracture device is cracked to enable the power transmission line to be disconnected and fall off.
16. A power tower protection device, said device comprising:
the stress fracture device is used for sensing the tension of a power transmission line to the power transmission line tower in real time, and enabling the power transmission line to fall off if the tension of the power transmission line to the power transmission line tower reaches a set threshold value;
and the damping device is used for enabling the power transmission line falling from the power transmission line tower to slowly fall.
17. The apparatus of claim 16, further comprising:
the stress fracture device comprises a fracture alarm unit, a fracture detection unit and a fracture alarm unit, wherein the fracture alarm unit is used for detecting fracture of the stress fracture device, generating a fracture alarm signal containing position information and wirelessly transmitting the fracture alarm signal;
and the force sensor is used for detecting the tension of the power transmission line on the power transmission line tower in real time, generating a tension alarm signal containing position information and wirelessly transmitting the tension alarm signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101009012A CN101521363B (en) | 2008-02-26 | 2008-02-26 | Protecting method, device and system for electric power pylon |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101009012A CN101521363B (en) | 2008-02-26 | 2008-02-26 | Protecting method, device and system for electric power pylon |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101521363A CN101521363A (en) | 2009-09-02 |
| CN101521363B true CN101521363B (en) | 2011-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008101009012A Active CN101521363B (en) | 2008-02-26 | 2008-02-26 | Protecting method, device and system for electric power pylon |
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| CN103904602B (en) * | 2014-03-19 | 2016-08-17 | 广州开能电气实业有限公司 | Electric line is abandoned line and is protected lever apparatus and abandon the installation method of line guarantor's lever apparatus |
| CN106803660A (en) * | 2015-11-26 | 2017-06-06 | 江苏天南电力器材有限公司 | One kind has monitoring function suspension clamp |
| CN106803659A (en) * | 2015-11-26 | 2017-06-06 | 江苏天南电力器材有限公司 | One kind has monitoring function pre-hinged catenarian cable cleat |
| CN105390987B (en) * | 2015-12-01 | 2017-05-10 | 广东电网有限责任公司电力科学研究院 | Wire-abandoning rod-protecting device with multidirectional overload protection of distribution network lines |
| CN105356370B (en) * | 2015-12-01 | 2017-04-12 | 广东电网有限责任公司电力科学研究院 | Wire abandoning and pole protecting device for distribution circuit under nature disaster exceeding designed condition |
| CN107119961A (en) * | 2017-05-24 | 2017-09-01 | 常熟风范电力设备股份有限公司 | A kind of intelligent composite electrical shaft tower |
| CN108533051B (en) * | 2018-05-31 | 2023-09-19 | 梁雪 | Novel monitoring deicing iron tower |
| CN111615138B (en) * | 2020-05-15 | 2021-06-04 | 北京交通大学 | Strong, medium and weak field region dividing method for mobile base station co-located high-voltage power transmission iron tower |
| CN112803337B (en) * | 2021-01-19 | 2022-06-21 | 卢欢欢 | Electrical system of lifting machine for urban construction |
| CN114243608B (en) | 2021-12-23 | 2022-09-02 | 东北电力大学 | Transmission line icing monitoring and anti-collapse tower device |
| CN116153019B (en) * | 2023-02-13 | 2023-08-22 | 深圳崎点数据有限公司 | Cloud computing-based power grid disaster early warning system |
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| CN1963879A (en) * | 2005-11-07 | 2007-05-16 | 国网北京电力建设研究院 | System and method for detecting online of built on stilts power transmission sequence |
| CN200969530Y (en) * | 2006-11-13 | 2007-10-31 | 付斌 | Electric power transmission iron tower and remote alarm system |
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| EP0055158A2 (en) * | 1980-12-03 | 1982-06-30 | SOCIETE D'APPAREILLAGE AUXILIAIRE POUR L'ELECTRICITE Societe Anonyme dite: | Safety connection device for electrical overhead lines comprising at least two long shaft insulator strings |
| CN1963879A (en) * | 2005-11-07 | 2007-05-16 | 国网北京电力建设研究院 | System and method for detecting online of built on stilts power transmission sequence |
| CN200969530Y (en) * | 2006-11-13 | 2007-10-31 | 付斌 | Electric power transmission iron tower and remote alarm system |
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