What are the specific regulations for inspections of manned and unattended substations?

State Grid Corporation’s Unattended Substation Operation and Maintenance Management Regulations

Chapter 5 Equipment Inspection

Article 30 The operation and maintenance team is responsible for unattended substations under their jurisdiction Inspection work related to field equipment in substations.

General requirements for inspections in Article 31:

(1) For equipment that does not have reliable automatic monitoring and alarm systems, the number of inspections should be appropriately increased;

(2) The substation production site should have complete safety measures and signs, and the construction area within the station must be reliably isolated from the operating area;

(3) To ensure the safety of night patrols, the substation should have complete equipment District lighting;

(4) On-site inspection equipment should be qualified and complete;

(5) During routine inspections, comprehensive inspections and professional inspections, operation and maintenance personnel should maintain standardized inspection operations Instructions (cards) are used to carry out equipment inspections, and inspection items and standards are implemented in accordance with the standardized inspection operation instructions (cards) approved by each unit;

(6) Spare transformers should be inspected in accordance with the requirements of operating equipment.

Article 32: Equipment inspections in unattended substations are divided into routine inspections, comprehensive inspections, professional inspections, lights-out inspections and special inspections.

Article 33: Conduct inspections of Class I substations no less than once every 2 days; Class II substations no less than 1 time every 3 days; Class III substations no less than once a week Less than once; Class IV substation no less than once every two weeks.

Substations equipped with intelligent robot inspection systems can reduce the number of routine inspections. Routine inspections refer to routine inspections of the appearance of equipment and facilities in the station, abnormal noise, equipment leakage, monitoring systems, abnormal alarms of secondary devices and auxiliary facilities, integrity of fire and security systems, substation operating environment, defects and hidden dangers, etc. Conducted inspections, and specific inspection items shall be carried out in accordance with on-site operating procedures.

Article 34 Comprehensive inspections: Class I substations shall be inspected no less than once a week; Class II substations shall be inspected no less than once every 15 days; Class III substations shall be inspected no less than once a month ? Once; Category IV substation no less than once every two months.

Comprehensive inspection refers to, on the basis of routine inspection items, opening and inspecting the equipment in the station, recording equipment operation data, checking equipment contamination, and checking whether there are fire prevention, small animal prevention, accidental locking prevention, etc. loopholes, check whether the grounding grid and leads are intact, and conduct detailed inspections of substation equipment and workshops.

Article 35 Professional inspections: Class I substations shall be inspected no less than once a month; Class II substations shall be inspected no less than once every quarter; Class III substations shall be inspected no less than once every six months. ; Category IV substations shall be inspected no less than once a year. Professional inspection refers to the centralized inspection and testing of equipment jointly carried out by operation and maintenance, maintenance, and equipment status evaluation personnel in order to gain an in-depth understanding of the equipment status.

Article 36: Lights-off inspection shall be conducted at least once a month. Lights-out inspections refer to inspections carried out at night with the lights turned off, focusing on checking whether there is corona and discharge in the equipment, and whether there is overheating in the joints.

Extended information

Applicable industries for unattended substation systems

1. Energy industry: substations in the electric power industry, substations/pumping stations in the water conservancy industry;

2. Communications industry: Telecom/Netcom computer room, China Mobile/China Unicom/PHS base station, computer room in other industries;

3. Warehousing industry: military/armed police warehouse, grain warehouse/tobacco warehouse/cold storage ; Warehouse monitoring in other industries;

4. Environmental protection industry: monitoring of major pollution sources, high-radiation, high-pollution places such as power plants and nuclear power plants;

5. Confidentiality agencies: government agencies, major Security agency monitoring, remote comprehensive monitoring of confidential places

6. Medical production: ward monitoring, isolation care of special patients, precision workshops of pharmaceutical companies, comprehensive monitoring of production lines, metallurgy, petrochemicals, process management, equipment Unattended

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