Management Regulations
The State Grid Corporation's "DC Power System Operation Specifications" outlines the operational management requirements, emphasizing that the supervisory unit must conduct annual inspections and evaluations of the DC power supply system within its jurisdiction. This ensures the system operates safely and efficiently, minimizing the risk of failures and maintaining reliable power supply.
Cleaning and Inspection Process
1. Preparation Work
To ensure a safe and effective inspection, the following tools are required: two brushes with insulated handles (one 1-inch brush and one 2-inch brush), and one hair dryer. These tools help in thoroughly cleaning the battery components without causing any damage or electrical hazards.
2. Cleaning and Inspection Steps
(1) Check the battery room to ensure proper ventilation, adequate lighting, and that fire-fighting equipment is in working condition. The temperature should be within acceptable limits, and no flammable or explosive materials should be present.
(2) Inspect the screen cabinet door to make sure it is intact and properly grounded to prevent electrical risks.
(3) Examine the batteries for any signs of leakage, deformation, or damage to the casing. Any abnormalities should be reported immediately.
(4) Ensure all connections between battery cells are secure and tight. The terminals should be clean, free from corrosion, and coated with neutral petroleum jelly to prevent oxidation.
(5) Check the battery plates for cracks, bends, deformations, sulfation, or short circuits. The color of the plates should be normal, and there should be no signs of undercharging or overcharging. The electrolyte temperature must not exceed 35°C.
(6) Use the brushes to clean the battery panel partitions and remove dust from the surface of the battery units.
(7) Use a vacuum cleaner to remove dust and debris from the bottom of the battery cabinet to maintain cleanliness and prevent overheating.
(8) Verify that the charging device’s AC input voltage, DC output voltage, and current are within normal ranges. Ensure that all meters are functioning correctly, and that protective signals (sound and light) are operating as expected. The running sound of the equipment should be normal.
(9) Confirm that the voltage on the DC control bus and power bus is within the specified range, and that the float charge current complies with the standard requirements.
(10) Test the insulation resistance of the DC system to ensure it is in good condition and meets safety standards.
(11) Check the operation monitoring signals for each branch circuit. Ensure that indicators are working properly, the fuses are intact, and the automatic air switches are in the correct position.
This comprehensive inspection process helps maintain the reliability and safety of the DC power system, ensuring continuous and stable operation in critical environments.
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