What is the working process of the substation?

1. Pre-Takeover Preparation for Substations

• Uniform & Identification Check: Wear standardized on-duty uniforms and display valid job badges (compliant with CHH Power’s safety dress code).
• Work Division & Equipment Familiarization: Clarify work responsibilities within the takeover team (e.g., primary equipment inspection, secondary system review) and review the latest operational records of key equipment (e.g., transformers, switchgear) to understand their current status.

2. Operational Status Briefing

• Primary & Secondary Equipment Status: Explain the current operating states of primary equipment (e.g., on/off status of high-voltage switches, load levels of transformers) and secondary systems (e.g., protection relay settings, monitoring system operation).
• Work Summary: Detail equipment defects (discovered and resolved), ongoing/completed operations (e.g., maintenance, testing), and handling of abnormal events or accidents.
• Auxiliary Information: Brief on the status of safety tools and instruments (e.g., insulation gloves, voltage testers), usage records of operation logs, and any instructions from superior departments (e.g., grid dispatch center).

3. On-Site Substation Inspection

• Main Control Room Check: Verify the status of secondary equipment (e.g., control panels, communication devices) and tools (e.g., operation keys, test meters) to ensure they are in normal working condition and properly stored.
• Field Equipment Inspection: Inspect primary equipment (e.g., transformers, circuit breakers) for visible abnormalities (e.g., oil leaks, abnormal noises, loose connections) and confirm that safety measures (e.g., grounding wires, warning signs) are correctly placed.

4. Formal Shift Handover Procedures

• Sign-Off on Duty Record: Both the outgoing and incoming teams sign CHH Power’s standardized Shift Duty Record Book, documenting the exact handover time (to the minute).
• Shift Completion Announcement: The incoming shift supervisor announces that the outgoing team is officially off duty, marking the end of the handover process.

5. Daily On-Duty Work After Takeover

• Record Documentation: Log the takeover details (e.g., inspection results, team members) in the Duty Record Book.
• Routine Checks:
  • Verify the accuracy of timekeeping devices (e.g., station clocks) and confirm smooth communication with the grid dispatch center (via phone, SCADA system).
  • Review and sign off on the previous shift’s operation logs, then update the log with the current date and on-duty team information.

6. Countdown Operation Procedures

1. The on-duty personnel receive the dispatch order, record the details (e.g., order time, content), and forward the task to the designated operator.
2. The operator and guardian jointly review the dispatch order recording to ensure full understanding.
3. The supervisor fills out the Dispatch Order Record Form, while the operator prepares the Operation Ticket (detailing step-by-step operations).
4. The operator and guardian cross-verify the Operation Ticket, then submit it to the on-duty supervisor for final review.
5. The operator executes the operation under the guardian’s supervision (in accordance with CHH Power’s “two-person operation system”).
6. After completion, the guardian reports the operation result to the outgoing shift team and updates the operational records.

7. Substation Accident Handling

• Immediate Action: Implement measures as instructed by the grid dispatch center (e.g., isolating faulty equipment) to prevent the accident from expanding.
• Status Monitoring & Recording: Observe changes in instrument readings (e.g., voltage, current), check the activation of light signals (e.g., fault alarms, trip indicators), and record all abnormal phenomena in detail.
• Reporting: Provide a comprehensive report to the dispatch center, including accident time, location, equipment involved, and observed symptoms. If necessary, coordinate with relevant departments (e.g., CHH Power’s maintenance team) for on-site support.

8. Maintenance Coordination

• Work Permit Preparation: The authorized work permit issuer (a qualified CHH Power staff member) fills out the Work Permit Form, specifying the scope of work and safety requirements.
• Safety Measure Deployment: Other on-duty personnel arrange on-site safety measures (e.g., installing grounding wires, setting up safety barriers) as per the work permit.
• On-Site Handover: After safety measures are in place, the work permit issuer and the maintenance team leader jointly inspect and confirm the safety setup before formally authorizing the start of work.
• Process Supervision: During maintenance, on-duty personnel periodically check to ensure the maintenance team complies with safety regulations (e.g., wearing PPE, avoiding unauthorized operations).