JPH0478942B2 - - Google Patents

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention is a method for detecting insulator contamination, which is used to accurately determine the amount of contamination of insulators used in power plants, substations, power transmission and distribution lines, etc. It is related to the device.

(Conventional technology) Insulator contamination using pilot insulators has traditionally been used to grasp the amount of contamination of insulators used in power plants, substations, power transmission and distribution lines, etc., and to determine when to implement maintenance measures such as insulator cleaning. A detector is used.
Such an insulator contamination detection device immerses a pilot insulator in a cleaning tank, removes dirt adhering to its surface by a method such as ultrasonic cleaning, and then measures the conductivity of the cleaning water to detect contamination of the insulator. Distilled water is used as the cleaning water to reliably detect even the slightest contamination, and to save distilled water, the distilled water must be replaced until the contamination reaches a set value. It is stored in a cleaning tank and used repeatedly without cleaning. As a result, although the cleaning tank is covered except during measurement to prevent the distilled water from deteriorating, it is impossible to avoid the gradual deterioration of the distilled water and fluctuations in conductivity. The change in conductivity of the cleaning water includes not only the amount of contamination of the pilot insulator, but also the deterioration of the distilled water, resulting in the problem that the measured value appears to be higher than the actual amount of contamination. .

(Problems to be Solved by the Invention) The present invention solves the above-mentioned conventional problems, and solves the problem that even when cleaning water is stored and used repeatedly, it is not affected by fluctuations in conductivity due to its deterioration. This was completed with the aim of creating an insulator contamination detection device that can accurately detect the amount of contamination on a pilot insulator.

(Means for Solving the Problems) The present invention is an insulator contamination detection device comprising a pilot insulator, a cleaning tank thereof, a conductivity measurement section for cleaning water, and a calculation section, wherein the conductivity measurement section is It has a function to measure the conductivity of the cleaning water immediately before and after the pilot insulator is immersed in the cleaning tank, and the calculation unit calculates the amount of contamination by obtaining the conductivity before and after cleaning, and calculates the amount of contamination. It is characterized by having a function of determining the difference and calculating the cumulative amount of contamination based on the difference.

(Example) Next, the present invention will be described in more detail with reference to illustrated examples.

In Fig. 1, 1 is a pilot insulator, 2 is a cleaning tank in which a predetermined portion of the pilot insulator 1 is immersed during measurement, 3 is a pump for supplying distilled water in a distilled water tank 4 to the cleaning tank 2, and 5 is a cleaning tank. This is an electrode for determining the conductivity of water. This electrode 5 constitutes a conductivity measuring section 7 together with a conductivity transmitter 6. Further, 8 is a calculation unit that performs overall control and calculation of measured values, and immerses the pilot insulator 1 in the cleaning tank 2, controls the ultrasonic oscillator 9, controls the recorder 10, and instructs the activation of the alarm 11. etc. This conductivity measuring section 7 is different from conventional ones in that it measures the conductivity of distilled water in the cleaning tank 2 immediately before the pilot insulator 1 is immersed in the cleaning tank 2, and also measures the conductivity of the distilled water in the cleaning tank 2 immediately after the pilot insulator 1 is immersed in the cleaning tank 2. It also has the function of measuring conductivity. The calculation unit 8 has a function of calculating the difference in conductivity before and after cleaning measured as described above.

(Function) The insulator contamination detection device of the present invention configured as described above is installed in the same natural environment as the actual insulator, so that the surface of the pilot insulator 1 is contaminated in the same way as the actual insulator, and a predetermined date is reached. As time passes, the pilot insulator 1 is immersed in the cleaning tank 2 and subjected to ultrasonic cleaning, and the amount of contamination of the pilot insulator 1 is detected by measuring the conductivity of the cleaning water, and the actual use is based on that value. This method is similar to the conventional method in that it is used to estimate the amount of contamination of the insulator. However, in the present invention, as described above, the conductivity measuring section 7 measures the conductivity not only after cleaning, but also immediately before the pilot insulator 1 is immersed in the cleaning tank 2, as shown in the flowchart of FIG. The calculation unit 8 obtains the electrical conductivity of the pilot insulator 1 before and after cleaning, calculates the respective amounts of contamination, and determines the difference between the amounts of contamination. Therefore, even if the measurement interval is long and the conductivity fluctuates due to deterioration of the distilled water in the cleaning tank 2 during this period, this amount is canceled and the pilot insulator 1
Only the increase in conductivity due to cleaning in the cleaning tank 2 can be accurately grasped. As a result, according to the insulator contamination detection device of the present invention, only the amount of contamination on the pilot insulator 1 can be accurately detected even when washing water is used repeatedly, and the measured values are often large unlike the conventional method. Never. The amount of contamination of the pilot insulator 1 that is accurately measured in this way is accumulated with the amount of contamination from the previous period, and when this cumulative amount of contamination exceeds a permissible value, maintenance measures such as cleaning the insulator are implemented. That will happen.

(Effects of the Invention) As is clear from the above description, the present invention reduces the amount of contamination of the pilot insulator without being affected by fluctuations in conductivity due to deterioration of the cleaning water even when the cleaning water is used repeatedly. Since it is possible to accurately detect the insulator contamination detection device that eliminates the problems of the conventional method, it will greatly contribute to the development of industry.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a flow chart showing its operation. 1: pilot insulator, 2: cleaning tank, 7: conductivity measurement section, 8: calculation section.

Claims (1)

[Claims] 1 An insulator contamination detection device comprising a pilot insulator 1, a cleaning tank 2 thereof, a conductivity measurement unit 7 for cleaning water, and a calculation unit 8, in which the conductivity measurement unit 7 It has a function of measuring the conductivity of the cleaning water immediately before and after being immersed in water, and the calculation unit 8 obtains the conductivity before and after cleaning, calculates the amount of contamination for each, and calculates the difference between the amounts of contamination. , an insulator contamination detection device characterized by having a function of calculating a cumulative contamination amount based on this.