The cable fault testerunder Wuhan UHV can help many power workers conduct various power tests more conveniently.

To avoid the occurrence of single-phase grounding faults, the following measures can be taken, combined with the relevant information in the reference article for point-to-point representation and summarization:

1、 Regular inspections and checks

Distance between wires and obstacles: Regularly check the distance between wires and trees or buildings to ensure compliance with safety standards and avoid single-phase grounding faults caused by wire breakage or short circuiting of trees.

Equipment status: Check if there is a bird's nest at the top of the pole, if the binding or fixation of the wire in the insulator is firm, if the insulator fixing bolts, cross arms, and tension bolts are loose, if the wire is broken or stranded, if the wire sag is too large or too small, etc.

2、 Insulation testing and equipment maintenance

Insulation testing: Insulators, branch fuses, lightning arresters and other equipment on distribution lines should be regularly tested for insulation, and any that fail should be replaced in a timely manner. This helps to promptly detect and address insulation issues, avoiding the occurrence of single-phase grounding faults.

Equipment maintenance: Regularly test distribution transformers and repair or replace unqualified distribution transformers. Ensure that the equipment is in good condition and reduce single-phase grounding faults caused by equipment failures.

3、 Install protective devices

Branch fuses: Installing branch fuses on rural distribution lines can reduce the scope of faults, minimize the area and duration of power outages, and facilitate quick identification of fault points.

High voltage level insulators: Use insulators with a higher voltage level on distribution lines to improve the insulation strength of the distribution network and reduce the risk of single-phase grounding faults.

4、 Prevent external damage

Construction supervision: Strengthen supervision of cable lines near the construction area to prevent cable damage caused by rough construction.

Warning signs: Set up clear warning signs around cable lines to remind construction personnel to pay attention to cable safety.

5、 Weather impact response

Lightning protection measures: Install lightning arresters and other lightning protection equipment to reduce the impact of lightning strikes on cables.

Adverse weather inspection: After adverse weather conditions such as strong winds, rain, snow, etc., timely inspect cable lines, discover and deal with possible safety hazards.

6、 Improve operational management level

Training and Education: Strengthen the training and education of cable operation and maintenance personnel to improve their professional skills and fault handling abilities.

Standardized operation: Develop and implement standardized operating procedures for cable operation and maintenance to ensure standardized, safe, and effective operation.

By implementing the above measures, the occurrence rate of single-phase grounding faults can be significantly reduced, and the stability and reliability of the power system can be improved.