JPH05274937A - Prediction device for insulator pollution - Google Patents

Abstract

PURPOSE:To provide an insulator pollution prediction device having the capability of accurately predicting an insulator pollution amount occurring up to a stage a few hours later due to a quick pollution cause such as a typhoon, when the cause is approaching. CONSTITUTION:When a quick pollution cause such as a typhoon is approaching, the predicted course thereof or the like is entered from an inputting device 7. Then, a processor 5 operates data related to a change with the elapse of time, for a wind direction and a wind velocity up to a stage a few hours later. Furthermore, the processor 5 operates an amount of wind run up to a stage a few hours later on the basis of the operated data, and predicts an insulator pollution amount occurring up to a stage a few hours later, according to a relational expression preliminarily stored. Data related to a change with the elapse of time for a wind direction and a wind velocity may directly be entered.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is applied to lines such as power plants, substations and transmission / distribution lines when weather conditions such as typhoons approaching or seasonal winds causing a rapid pollution of insulators occur. The present invention relates to an insulator fouling predicting device for predicting the degree of fouling of used insulators and performing maintenance measures such as insulator cleaning without loss of time.

[0002]

2. Description of the Related Art When a weather condition such as a typhoon or a strong seasonal wind occurs, the insulator surface is rapidly soiled in a short time to deteriorate the insulation property, which causes a flashover accident. In order to avoid such an accident, it is necessary to clean and wash the insulators before the pollution amount of the insulator exceeds the pollution control limit value. In particular, in the case of a typhoon attack, it is preferable to predict the amount of insulator contamination due to the typhoon in advance and perform insulator cleaning, personnel allocation, etc. before the attack.

However, the conventional insulator contamination amount detecting device is
Since the contaminants adhering to the insulator surface were dissolved in water to measure its electrical conductivity, and the leakage current on the insulator surface was measured to convert it to the insulator contamination amount, the insulator contamination amount at the time of measurement was measured. It is only known, and it is not possible to predict future pollution levels.

Therefore, hitherto, a flashover accident is prevented by predicting the damage based on the experience of the past typhoon, arranging a large number of personnel, and continuously cleaning the insulator. It was However, the empirical fouling prediction sometimes poses a risk of missing the appropriate insulator cleaning timing, and also leaves problems such as allocating more people than necessary and securing a large amount of cleaning water. ..

[0005]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems of the prior art, and when a typhoon or other cause of rapid fouling approaches, the amount of fouling due to the insulator can be accurately predicted until a few hours later. It was completed in order to provide an insulator pollution prediction device capable of

[0006]

It is well known that the amount of salt attached to an insulator is generally related to the average wind speed, but the distance from the cause of pollution, the wind direction, the wind speed, the transportation route of the contaminant, etc. Also depends on. However, under the same environment, as shown in FIG. 1, there is a correlation between the salt attachment density and the value of [(average wind speed) ⁿ x time], and the value of n falls within the range of 1 to 3. Can be specified with. The present invention was made on the basis of the above experimental facts, and based on the predicted course and the past data accumulated when approaching the cause of rapid pollution, the wind direction and wind speed temporal data up to several hours later at the insulator installation position. From the relational expression between the flow amount obtained from the actual measurement and the insulator contamination amount, which is input in advance. And a means for predicting the amount of insulator fouling up to the end of time.

[0007]

In order to predict the amount of insulator fouling by the device of the present invention, the current position and the predicted route announced by the Japan Meteorological Agency are input by the input device when the cause of rapid fouling such as a typhoon approaches. Then, based on the accumulated past data, temporal data of wind direction and wind speed up to several hours later are calculated. Based on this data, the air flow amount up to several hours later is calculated, and the insulator air pollution amount up to several hours later is predicted from the relational expression between the air flow amount and the insulator pollution amount obtained from the actual measurement that has been input in advance. To be done. The time at which the pollution control limit value is reached can be calculated based on the predicted amount of insulator pollution.
Furthermore, instead of calculating the wind direction and wind speed temporal data up to several hours later as described above, it is possible to predict the insulator contamination amount in the same way by directly inputting the wind direction and wind speed temporal data up to several hours later. is there.

[0008]

The present invention will be described in detail below with reference to the embodiment shown in FIG. First, the structure of the device of the present invention shown in FIG. 2 will be described. 1 is an insulator pollution detection device that has been conventionally used, 2 is a wind direction and anemometer, 3 is a rain gauge, 4 is a weather and pollution data input device, Reference numeral 5 is an arithmetic processing device, 6 is a database, 7 is an input device, 8 is a display device, and 9 is a recording device.

When approaching the cause of rapid pollution such as a typhoon, the position, size, strength, etc. of the typhoon announced by the Japan Meteorological Agency and after several hours are input from the input device 7. Based on the input data, the arithmetic processing unit 5 calculates V _mt (t), which is a predicted time-lapse data group of wind speed, based on the past record data accumulated in the database 6. Processor 5
Calculates the air flow rate up to several hours later based on this data V _mt (t). Here, the air flow means wind speed × time, and the air flow amount H _mt (t) at time t can be calculated by the following equation. Wind volume H _mt (t) = ∫ ^t V _mt (t) dt

The relationship between the air flow rate H _mt (t) and the increase in the insulator fouling attachment density ESDD _i is obtained by actual measurement as described above, and the relationship can be expressed by an equation. ESDD _i = f [flow rate H _mt (t)] ... Then, if the insulator fouling adhesion density ESDDt ₀ of the present T0 is actually measured by the insulator fouling detection device 1, an arbitrary time T in the future can be obtained.
The insulator fouling attachment density ESDDt _{f at F} is obtained by an equation. ESDDt _f = ESDDt ₀ + f [H _mt (TF-T0)]
= ESDDt ₀ + ∫ ^TF V _mt (t) dt ...

As described above, the arithmetic processing unit 5 is operated at an arbitrary time T
The insulator fouling attachment density at F can be predicted.
Also, the pollution control limit value ESD determined for each power plant
Time of arrival at the D _S calculates fouling amount corresponding to ESDD _S -ESDDt _0, it can be predicted by calculating back the time t from the equation. These prediction results are displayed on a display device 8 such as a CRT in a trend graph or a table of the relationship between the elapsed time and the stain amount. It is also possible to print out on a recording device 9 such as a printer or plotter.

In the above description, the position, size, strength, etc. of the typhoon at the present time and several hours later are input from the input device 7, but manual input is omitted by using the online service of the Japan Meteorological Agency. You can also Further, instead of such data, V _mt (t), which is a predicted data group of wind speed, may be directly input from the input device 7.

Further, the predicted time-dependent data of the wind speed predicted by the real-time data collected by the wind direction and anemometer 2 is corrected, and the real-time data is collected by the rain gauge 3, and the rainfall intensity / total rainfall and porcelain salt deposition It is also effective to improve the accuracy of the prediction by correcting the porcelain salt attachment density at the present point in view of the relationship between the density and the rainwash effect.

[0014]

As described above, according to the insulator fouling predicting apparatus of the present invention, it is possible to predict the fouling amount of insulators continuously for several hours, especially when a cause of rapid fouling such as a typhoon approaches. For this reason, the insulator can be washed without loss of time, a power failure accident due to a flashover accident, etc. can be prevented, and a minimum number of necessary personnel can be pre-arranged. Therefore, the present invention, as a novel insulator pollution prediction device,
The contribution to industrial development is extremely large.

[Brief description of drawings]

FIG. 1 is a graph showing a relationship between a salt attachment density and a value of [(average wind speed) ⁿ × time].

FIG. 2 is a block diagram showing an embodiment of the present invention.

[Explanation of symbols]

 1 Insulator Contamination Detection Device 5 Arithmetic Processing Device 7 Input Device

Claims (1)

[Claims] 1. A means for inputting or calculating temporal data of wind direction and wind speed up to several hours later at an insulator installation position based on the predicted course and accumulated past data when approaching the cause of rapid pollution, and this data. Means to calculate the amount of air flow up to several hours based on the following, and means to predict the amount of air pollution up to several hours from the relational expression of the air flow amount and the amount of insulator fouling obtained from actual measurement that is input in advance An insulator fouling prediction device characterized by comprising: