System and method for simulation of insulator chain wind deflection angle measurement by employing wind tunnel experiment

Abstract

The present invention discloses a system and method for simulation of insulator chain wind deflection angle measurement by employing a wind tunnel experiment. The system comprises a wind tunnel, a ventilation device, at least three tower insulator chain models, a wind deflection angle monitoring module and a remote monitoring platform. The wind tunnel includes a wind tunnel body which is provided with an inlet, a power section, a transition section, a settling chamber, a contraction section, an experimental section and an expansion section in order; the ventilation device is installed at the power section of the wind tunnel body; the tower insulator chain models are installed at the experimental section of the wind tunnel body; and the wind deflection angle monitoring module is installed on the tower insulator chain models to monitor the insulator chain wind deflection angle data, and the insulator chain wind deflection angle data is transmitted to the remote monitoring platform through the wireless transmission network for processing. The system and method for simulation of insulator chain wind deflection angle measurement by employing the wind tunnel experiment can directly employ the wind tunnel to simulate the wind field for measurement of the wind deflection angle with no need for building a real transmission line tower for experiment, and can ensure that the experiment result is accurately obtained.

Description

technical field [0001] The invention relates to the technical field of high-voltage insulator tests, in particular to a system and method for measuring wind deflection angles of insulator strings simulated by wind tunnel experiments. Background technique [0002] The wind deflection discharge of insulator strings in transmission lines has always been one of the problems that affect the stable operation of the line. Different from trips caused by other reasons such as lightning strikes, the possibility of successful closing is not high after a wind deflection trip occurs on the line, which will cause great losses to the power supply system. According to the experience of relevant scholars for many years of research, the causes of wind deflection can be divided into internal and external factors. The internal cause is due to the insulator string's own insufficient level of resistance to wind deflection, and the external cause is caused by strong winds and harsh weather conditi...

AI Technical Summary

Problems solved by technology

At present, two methods are generally used to detect the wind deflection angle of insulator strings. One is to measure by installing an inclination sensor on the suspended composite insulator string. In this method, the sensor can only be installed on the upper part of the insulator string. For live parts, when only the insulator at the bottom end has a large offset, but at this time the insulator string is not close to the tower and wind deflection discharge does not occur, it will cause false alarms and it is difficult to give an accurate warning

The other is to measure the wind speed, wind direction, temperature, humidity and other parameters near the insulator string, and use the wind angle calculation formula to calculate the wind angle. This method is restricted by the accuracy of the sensor and the selected mathematical model, and the mathematical model cannot be completely Various parameters that affect wind deflection are considered in detail, and there is a certain error

The above two methods must be carried out at the tower of the actual transmission line, which is extremely inconvenient to operate and has certain risks.

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