JPH07140194A - Salt injury monitor and insulator cleaner - Google Patents

Abstract

PURPOSE:To detect salt injury of an insulator supporting a transmission line and to clean the insulator automatically. CONSTITUTION:A CT (current transformer) is fitted to an insulator coupling between a steel tower body 1 and a transmission line 4, 5 in order to measure the leak current flowing into the insulator thus detecting the salt injury. When a salt injury is detected, a signal is delivered on a composite fiber optic overhead ground wire 6 to a supervisory center 13. The supervisory center 13 delivers a cleaning start command to a pump 15 which is thereby driven to pressurize the cleaning water stored in a tank 16. The water is then jetted through nozzles 18-21 to clean off the briny water from the surface of the insulator. Furthermore, a water suction pipe 25 is embedded in a trench 24 for burying a deep earth electrode 23 in order to pump up the underground water by means of a pump 26 and to store the water in the tank 16. Power generated by an automatic starting engine, a windmill 28, or solar cells is stored in a battery 32 and used as a power supply for the pumps 15, 26.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a salt damage monitoring device for detecting the adherence of salt to an insulator on a steel tower supporting a power transmission line, and an insulator cleaning device for removing the salt adhered to the insulator.

[0002]

2. Description of the Related Art If seawater splashes from a typhoon or the like and adheres to an insulator on a steel tower that supports a power transmission line, it causes salt damage and reduces the electrical insulating ability of the insulator, causing a ground fault or an interphase short circuit accident. Therefore, before the occurrence of a ground fault or a phase-to-phase short circuit, the insulator must be washed to remove the adhering salt. Conventionally, in this work, a worker climbed up a steel tower where power transmission was stopped and manually washed the insulators one by one.

[0003]

In such a conventional cleaning work, since the degree of salt damage of each insulator is not known in advance, it is necessary to climb all the steel towers to check the salt damage for cleaning, and it is dangerous and non-cleaning. There was a problem that it was efficient and required a lot of labor. The present invention has been made to solve the above problems, and an object thereof is to provide a salt damage monitoring device capable of detecting the occurrence of salt damage unattended and an insulator capable of efficiently cleaning the insulator unattended. It is to provide a cleaning device.

[0004]

In order to achieve the above object, the salt damage monitoring apparatus of the first invention is a connecting metal fitting for an insulator which is connected between a steel tower body and a power transmission line to suspend and support the power transmission line. A CT that detects the leakage current flowing between the transmission line and the tower body through the insulator while it is installed, and outputs a salt damage occurrence signal when the current value detected by the CT exceeds a predetermined value And a salt damage detection circuit for controlling the salt damage.

A second aspect of the present invention is the salt damage monitoring device according to the first aspect of the invention, characterized in that it is provided with a signal sending means for sending a salt damage generation signal to the monitoring center via the optical fiber composite overhead ground wire.

According to a third aspect of the present invention, there is provided an insulator cleaning apparatus in which an intake tank for storing cleaning water, a pump for pressurizing the cleaning water in the intake tank, a driving means of the pump, and the pressurized cleaning water are sprayed onto the insulator. It is provided with an automatic swinging nozzle.

A fourth aspect of the present invention is the insulator cleaning apparatus of the third aspect of the invention, in which a water absorption pipe is buried together with the ground electrode in a burial hole for burying a deep buried ground electrode connected to a steel tower, and ground water is pumped up by a pump to take in water. Characterized by storing in a tank. Here, in the insulator cleaning apparatus according to the third or fourth aspect of the invention, the automatic start-up engine can be used as the pump driving means. Similarly, a wind turbine installed on a steel tower, a generator connected to the wind turbine, a storage battery that stores the generated electric power, and a motor connected to the storage battery can serve as a pump driving unit. Furthermore, a motor connected to a commercial power source can be used as the driving means of the pump.
Furthermore, a solar cell installed on a steel tower, a storage battery that stores the generated electric power, and a motor connected to the storage battery can serve as a pump driving unit.

A fifth aspect of the invention is characterized in that, in the insulator cleaning apparatus of the third or the fourth aspect of the invention, the activation is started by the salt damage generation signal output from the salt damage monitoring apparatus of the first invention.

A sixth aspect of the invention is characterized in that, in the insulator cleaning apparatus of the third or fourth aspect, the start-up is started by a start-up command from the monitoring center.

[0010]

In the salt damage monitoring apparatus of the first and second inventions, the CT is attached to the connecting fitting of the insulator which is connected between the tower main body and the power transmission line and suspends and supports the power transmission line, and is sent through the insulator. Leakage current flowing between the electric wire and the tower body is detected. When the detected current value exceeds a predetermined value, the salt damage detection circuit outputs a salt damage generation signal. This salt damage generation signal is transmitted to the monitoring center via the optical fiber composite overhead ground wire and is centrally monitored.

In the insulator cleaning apparatus according to the third aspect of the invention, the cleaning water stored in the intake tank is pressurized by the pump and sprayed from the automatic swing nozzle that operates by the pressurization to clean the entire insulator string.

In the insulator cleaning apparatus of the fourth aspect of the present invention, the water absorption pipe is buried together with the ground electrode in the excavation hole for burying the deep buried ground electrode for the steel tower, and the ground water is pumped up by the pump and stored in the intake tank.

As a means for driving the pump of the insulator cleaning apparatus of the third and fourth inventions, an automatic start type engine is used, or electric power obtained by installing a wind turbine with a generator or a solar cell on a steel tower is used. By driving the motor after storing it in the storage battery, it becomes possible to operate even in a place where commercial power cannot be obtained. Of course, where commercial power is available, the motor can be driven and operated by commercial power.

In the insulator cleaning apparatus according to the fifth aspect of the present invention, the automatic cleaning is performed by an unmanned person by being activated by the salt damage occurrence signal from the salt damage monitoring apparatus of the first aspect.

In the insulator cleaning apparatus of the sixth aspect of the invention, the insulator cleaning apparatus is activated by an activation command from the monitoring center, and the cleaning is performed unattended by remote control.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory diagram showing a configuration of an embodiment according to the present invention, and FIG. 2 is an enlarged view of a main part of FIG. In FIG.
The steel tower 1 supports the power lines 4 and 5 via the insulator chains 2 and 3, and also supports the optical fiber composite overhead ground wires 6 and 7 at the top of the steel tower 1. As shown in FIG. 2, in the insulator string 2, a plurality of suspension insulators 8 are vertically connected in series, the upper end is fixed to the steel tower 1, and the lower end supports the power line 4.

Further, a CT (current transformer) 11 is fitted on the outer peripheral portion of the connecting fitting 9 between the uppermost suspended insulator 8 and the steel tower 1. Due to this CT11, the splash of seawater adheres to the surface of the suspension insulator 8 and the insulating property of the suspension insulator 8 is deteriorated.
It is possible to detect the leakage current flowing from the tower to the steel tower 1.
The current value detected by CT11 is sent to the control panel 12.
A salt damage detection circuit is built in the control panel 12, and a salt damage generation signal is output when the detected leakage current value exceeds a preset current value. The salt damage occurrence signal is sent to the monitoring center 1 via the optical fiber composite overhead ground wire 6.
Sent to 3.

Similarly, in the insulator series 3 as well, the CT 11 is fitted to detect the occurrence of salt damage, and a salt damage generation signal is sent from the control panel 12 to the monitoring center 13 via the overhead ground wire 6. When the salt damage occurrence signal is sent, the monitoring center 13 displays it and issues an alarm. as a result,
If necessary, a cleaning start command is issued from the monitoring center 13 by the operator's operation and sent to the steel tower 1 via the optical fiber composite overhead ground wire 7. When a cleaning start command is input to the control panel 12 of the steel tower 1, the engine 33 or the motor 14 of the automatic start type connected to the control panel 12 is activated to drive the pressure pump 15.

The pressurizing pump 15 sucks in and pressurizes the wash water stored in the intake tank 16 and sends it to the nozzles 18 to 21 through the water supply pipe 17. The nozzles 18 and 19 and the nozzles 20 and 21 are arranged on both sides of the insulator series 2 and 3, respectively, and wash the insulator series 2 and 3 by ejecting pressurized cleaning water. At this time, the nozzles 18 to 21 automatically swing with the injection of cleaning water to perform cleaning evenly. The washing water in the water intake tank 16 is obtained by burying the water absorption pipe 25 together with the ground electrode 23 in the hole 24 drilled for burying the deeply buried ground electrode 23 for preventing lightning damage connected to the steel tower 1. The groundwater in the excavation hole 24 is pumped up and stored by the pump 26.

The pump 26 is driven by a motor 27,
The motor 27 is controlled by the control panel 12 to start and stop. The control of the motor 27 by the control panel 12 is such that a float switch or an electrode rod for detecting the water level is installed in the water intake tank 16 (not shown), and when the water level falls below a predetermined level, the motor 27 is activated and started. Pump water.
When the water level reaches a predetermined level, the motor 27 is stopped. In this way, the amount of wash water in the intake tank 16 is maintained above a certain level. Also, a copper pipe is used for the water absorption pipe 25,
When the inner surface of the water intake tank 16 is a copper plate, it is possible to prevent algae from being generated and prevent spoilage of wash water by the sterilizing action of copper.

Further, although not shown, the water intake tank 16 is provided with an electric heater to heat the wash water to prevent freezing when the water temperature decreases in winter. It should be noted that if there is a city water facility nearby as a water source for the wash water, it is possible to use it. The control panel 12 and the motors 14 and 27 are powered by wind power. That is, as shown in the figure, the wind turbine 28 is installed in the steel tower 1, and the rotation of the wind turbine 28 is transmitted to the generator 29 to generate electric power. The generated electric power is once stored in the storage battery 32 connected via the rectifier circuit 31 and then used.

Further, instead of the wind turbine generator, a solar cell may be installed and placed. Furthermore, it is possible to generate a shortage of electric power by the engine 33.
Furthermore, the pump 26 can be driven by the engine 33. These are power sources and power sources when the tower 1 is installed in a remote place and commercial power cannot be obtained. When commercial power can be easily obtained, commercial power is used.

In this embodiment, the monitoring center 13 intensively monitors the occurrence of salt damage in each steel tower, and outputs a cleaning start command based on the monitoring result. As a result, it becomes possible for workers to monitor salt damage unattended without having to go to individual steel towers, and to carry out cleaning operations by remote control based on the monitoring results. In this way, it is possible to significantly reduce the labor and rationalize the maintenance work of the transmission line against salt damage.

In the above-described embodiment, the salt damage of each steel tower 1 is monitored at the central monitoring center 13 and the cleaning command is sent from the monitoring center 13 to each steel tower 1. It is also possible to carry out cleaning. That is, when the occurrence of salt damage is detected in the control panel 12 of each steel tower 1, the motor 1 is directly fed from the control panel 12.
4 is started, the pump 15 is driven, and pressurization and water supply are started to perform cleaning. It is also possible to manually operate the control panel 12 to perform cleaning.

[0025]

As described above, according to the salt damage monitoring apparatus of the first invention, the leakage current flowing through the connecting fitting of the insulator connecting the steel tower body and the power transmission line is detected by using CT. As a result, the detection of the occurrence of salt damage is unmanned and mechanized, and the work for monitoring the occurrence of salt damage can be labor-saving and efficient.

Further, according to the salt damage monitoring device of the second invention, when the occurrence of salt damage is detected, the monitoring center is notified via the optical fiber composite overhead ground wire, whereby the occurrence of salt damage for each steel tower is concentrated. It will be possible to monitor.

According to the insulator cleaning apparatus of the third aspect of the present invention, cleaning water stored in the intake tank is pressurized by the pump and jetted from the nozzle to clean the insulator, thereby making the insulator cleaning unmanned and mechanized. It will be possible.

According to the insulator cleaning apparatus of the fourth aspect of the present invention, the use of the excavation hole for burying the deeply buried ground electrode makes it easier to secure cleaning water for cleaning the insulator. In addition, in order to drive the pump of the insulator cleaning device of the third and fourth inventions, an automatic start-up engine is used, or electric power obtained by installing a wind turbine with a generator or a solar cell in a steel tower is stored in a storage battery. By driving the motor afterwards, it becomes possible to operate in a place where commercial power cannot be obtained. Of course, where commercial power is available, the motor can be easily driven and operated by the commercial power.

According to the insulator cleaning apparatus of the fifth invention,
The insulator cleaning device is activated by the salt damage generation signal from the salt damage monitoring device of the invention described above, and fully unattended automatic operation is enabled.

According to the insulator cleaning apparatus of the sixth aspect of the present invention, since the cleaning is started by the activation command from the monitoring center, the insulator cleaning apparatus can be remotely operated and the work can be made more efficient and centralized. .

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a configuration of an embodiment according to the present invention.

FIG. 2 is an enlarged view of a main part of FIG.

[Explanation of symbols]

 1 Steel tower 2,3 Insulator series 4,5 Power line 6,7 Optical fiber composite overhead ground wire 8 Suspended insulator 9 Connection metal fittings 11 CT (current transformer) 12 Control panel 13 Monitoring center 14 Motor 15 Pressure pump 16 Water intake tank 17 Transmission Water pipe 18-21 Nozzle 23 Deeply buried ground electrode 24 Drilling hole 25 Water absorption pipe 26 Pump 27 Motor 28 Windmill 29 Generator 31 Rectifier circuit 32 Storage battery 33 Engine

Claims (10)

[Claims] 1. A leak current flowing between a power transmission line and a tower main body is detected through the insulator while being mounted on a connecting fitting of an insulator connected between the steel tower main body and the power transmission line to suspend and support the power transmission line. And a salt damage detection circuit that outputs a salt damage generation signal when the current value detected by the CT exceeds a predetermined value. 2. The salt damage monitoring device according to claim 1,
A salt damage monitoring device comprising a signal transmission means for transmitting a salt damage generation signal to a monitoring center via an optical fiber composite ground wire. 3. An intake tank for storing cleaning water, a pump for pressurizing the cleaning water in the intake tank, a driving means for the pump, and an automatic swing nozzle for injecting the pressurized cleaning water onto the insulator. An insulator cleaning device characterized in that 4. The insulator cleaning apparatus according to claim 3,
An insulator cleaning device characterized in that a water absorption pipe is buried together with a ground electrode in a burial hole of a deep buried ground electrode connected to a steel tower, and ground water is pumped up by a pump and stored in an intake tank. 5. The insulator cleaning apparatus according to claim 3 or 4, wherein an automatically started engine is used as a pump driving means. 6. The insulator cleaning apparatus according to claim 3 or 4, further comprising: a wind turbine installed on a steel tower, a generator connected to the wind turbine, a storage battery for storing generated power, and a motor connected to the storage battery. Insulator cleaning device using a pump as a driving means. 7. The insulator cleaning apparatus according to claim 3 or 4, wherein a motor connected to a commercial power source is used as a pump driving means. 8. The insulator cleaning apparatus according to claim 3 or 4, wherein a solar battery installed on a steel tower, a storage battery for storing generated power, and a motor connected to the storage battery are used as driving means for a pump. Cleaning device. 9. The insulator cleaning device according to claim 3 or 4, wherein the insulator cleaning device is started up by a salt damage generation signal output from the salt damage monitoring device according to claim 1. 10. The insulator cleaning apparatus according to claim 3 or 4, wherein starting is started by a start command from a monitoring center.