The factors affecting the safety of power transmission line can be roughly divided into two categories, namely the sudden failure caused by the annuality of wear aging and external causes. Both may cause a fault trip that affects power supply, which may cause the grid to be paralyzed. The factors affecting the safety of these factors can be roughly divided into two categories, namely the sudden failure caused by the annuality of wear aging and the external cause.
Both may cause a fault trip that affects power supply, which may cause the grid to be paralyzed. In these factors, time accumulation can be controlled, the chance to fail is extremely low, and external environmental weather (including lightning, typhoon, hull, ice, pollution, temperature and humidity, air pressure, bird, etc., the uncontrollable factors, The speed of the fault is extremely high, the destructive power is large. Below big.
A large amount of power transmission line set in the wild, with a large number of tower spacings, high degree of high phase, making the line Nile levels relatively poor, and it is easy to suffer. In the harsh ground, there are many single-return lines, and there is no shielded and shunt protection provided by parallel lines, which increases the incidence of lightning accidents. Lightning strips account for larger than the power transmission line failure, the lower the voltage level, the higher the probability of lightning strikes.
In order to reduce the chances of transmission lines, the chances of lightning accidents should be anti-flashing, anti-construction arc, anti-straight hit, and power supply. Use the following protection measures: 1, set up the lightning line. 2, add a coupling ground.
3. Reduce the ground resistance of the tower impact. 4, adopt neutral point non-direct grounding system. 5, strengthen the level of insulation.
6, install automatic recruitment. 7, mount tube arrester. 8. Use unbalance insulation, double-circuit into ring network power supply.
Second, the typhoon typhoon weather is accompanied by wind rinsing phenomena, and the transmission line will occur, the wind is shouted, broken, broken, and inverted tower. Disconnect, the tower is easy to appear in the North and South to solve the network. As the power system is designed to increase the wind speed value of the transmission line, the chances of disconnecting the tower accident, but the wire is dramatic, the wind is charged, and the outer gas is damaged. High rate. For vibration lines with low wind speed, most of the lines are installed in the air-resonant device to control. When a strong wind is encountered, the following measures can be used: 1. Increase the anti-vibration hammer, add heavy hammer, to increase the vertical load of the transmission line. Carrying capacity, reducing the width of the line left.
2, install the damping line, protect the line, increase the split root, reinforce the wire, to ensure the wires between the wires, and the safety distance between the tower. 3. The suspension method of V-type insulator string is used, and the insulator resistance to the wind and transverse drift is enhanced. 4. When designing the tower, set up a power transmission line, consider having a large distance, down, or extended, and widened.
Third, the mountain fire passed the related knowledge released by the cable fault detection center we can know that the forest fire caused by high temperature, human becomes, so that the air has a long temperature, low humidity, located in the mountain, across the forest Between the output of the vegetation, between the earth or the phase line, due to the heat exchange of the air particles, the charge charge is increased, the particle movement speed is accelerated, and the conductive passage is formed, and the line flashing trip is formed, 90 %% UFF0C accounts for the mountain fire trip For the main cause of the mountain fire trip, it is also included in the case of high temperature burning line insulation, and the wire is discharged on the tower. In response to the phenomenon of the mountain, it is necessary to reduce the incidence of hills from the prevention measures of fire: 1. Control about the trees, quantity, and species of the trees near the tower. 2. Establish emergency response measures, there is a safe passage sufficiently length and width.
3, the line protection system is reliable and sensitive. 4. Establish a real-time monitoring system and enhance the monitoring effect. 5, season season, minute period, minute weather conditions, increase line inspection, eliminate hidden dangers.
The above is the knowledge of cable faults released by the cable fault detection center. Do you know? Pay attention to Xiaobian, which will bring more exciting knowledge to you later.
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