Power cables play a crucial role in the power transmission system. However, due to various reasons, cable failures occur frequently, causing serious impacts on power supply and the economy. By analyzing specific cable fault cases, valuable lessons can be summarized, providing guidance for the prevention and handling of future cable faults. Through several typical cases, the Pearl River Cable will discuss the causes, treatment process and lessons learned of power cable faults.

Case 1: Large scale power outage caused by cable aging in a certain city

Case background

During the peak electricity consumption period in summer, a large-scale power outage occurred in a major city, resulting in power outages in multiple important commercial and residential areas. After investigation, the source of the malfunction was an underground cable that had been in operation for over 20 years.

Reason for malfunction

The cable has been operating under high load for a long time, causing its insulation layer to gradually age. As time passed, the insulation performance continued to decline, ultimately leading to breakdown and short circuit in high-temperature environments.

process

The emergency maintenance team quickly located the fault point, took emergency measures to replace cables, and allocated other lines to share the load, restoring power supply.

experience and lesson

1. Regular inspection and maintenance: Old cables should undergo regular condition monitoring and maintenance to promptly identify and address potential issues.

2. Upgrade and renovation: For cables that have exceeded their design lifespan, they should be upgraded and renovated in a timely manner, using new cable materials with better performance.

3. Load management: Reasonably manage the power load, avoid cables from being overloaded for a long time, and extend the service life of cables.

Case 2: Cable Failure Caused by Construction Damage

Case background

A certain power company accidentally injured a high-voltage cable during underground pipeline construction, causing power interruption in the area and triggering a fire, resulting in equipment damage and economic losses.

Reason for malfunction

Insufficient understanding of the distribution of underground cables and improper operation of construction equipment during the construction process directly damaged the cables.

process

The power company urgently dispatched a repair team to the scene, first controlling the fire and ensuring safety before carrying out cable repairs. At the same time, temporary power supply measures should be taken to minimize the impact on users.

experience and lesson

1. Pre construction survey: the distribution of underground cables shall be investigated in detail before construction, and detailed construction plans and safety measures shall be formulated.

2. Construction personnel training: Strengthen the training of construction personnel to enhance their awareness and operational skills in cable protection.

3. Emergency plan: Develop and improve emergency plans to ensure rapid response and effective handling in the event of a malfunction.

By analyzing the above power cable fault cases, it can be seen that there are various reasons for cable faults, including cable aging, construction damage, and environmental factors. In every case, timely and effective emergency response and fault repair are key to restoring power supply. Meanwhile, by summarizing the experience and lessons learned, corresponding preventive measures can be taken to reduce the probability of cable failures.