Upskilling Operator GI : SOP Gangguan Trafo

Summary

PT PLN Persero is committed to ensuring the reliability of Indonesia's electricity system by quickly and accurately handling any disruptions to infrastructure. The process begins with the operator of the substations inspecting and verifying equipment, particularly transformers, to identify the nature and location of faults. The operator coordinates with various teams for further investigation, following strict procedures and safety protocols. After identifying the cause, maintenance teams take corrective action, and the power system is restored. The entire process aims to maintain a stable and high-quality electrical system.

Takeaways

• 😀 PT PLN Persero is committed to ensuring the reliability of electricity infrastructure in Indonesia.
• 😀 Operators at substations are responsible for inspecting substation equipment, including transformers.
• 😀 When a transformer fault is detected, operators check the annunciator panel to identify the issue and its location.
• 😀 After initial identification, the operator verifies the protection system by inspecting the relays and lockouts on the control panel.
• 😀 The operator reports the fault to the load control unit (UP2B), providing details about the fault, including time and indication.
• 😀 The operator ensures accurate and consistent communication with transmission units and other related groups.
• 😀 The substation operator contacts the team leader to receive instructions for further handling and preparation for investigation.
• 😀 Before beginning the investigation, a safety briefing is held, and personal protective equipment (PPE) is checked.
• 😀 The investigation team installs a lockout/tagout (LOTO) system on the control panel to ensure safety during the inspection.
• 😀 After the investigation, maintenance teams report findings and recommend corrective actions, and the substation operator coordinates the normalization process.
• 😀 Finally, the team documents the investigation results, and the team leader logs the incident in the outage information system to ensure system stability.

Q & A

What is the primary responsibility of PT PLN Persero in maintaining Indonesia's electricity system?

PT PLN Persero is committed to ensuring the reliability of the electricity infrastructure in Indonesia by addressing disturbances promptly, accurately, and in accordance with procedures.

How does the operator of the substations (gardu induk) handle disturbances in the transformers?

The operator immediately inspects the transformer’s control panel to verify indications of any disturbance and conducts an initial verification of the protection system, including checking relays and lockouts on the control panel.

What is the purpose of the initial inspection by the operator after a transformer disturbance is detected?

The initial inspection helps gather preliminary information regarding the type and location of the disturbance, which is essential for the next steps in handling the issue.

What happens after the initial disturbance identification?

The operator reports the disturbance to the Unit Pelaksana Pengatur Beban (UP2B), including details of the disturbance and the time of occurrence, which is then used for further coordination.

Who is involved in the coordination after a transformer disturbance is reported?

The coordination group involves transmission unit services, the substation operator, and the UP2B to ensure that all parties receive accurate and uniform information.

What is the role of the team leader of the substation operator after the disturbance report?

The team leader of the substation operator receives the disturbance report and gives further instructions for handling the issue, preparing for an investigation alongside the maintenance team.

What are the safety procedures followed before starting the investigation?

Before beginning the investigation, the team leader and maintenance team conduct a safety briefing and check personal protective equipment (PPE) to ensure safety during the investigation.

What is the significance of the LOTO (Lockout-Tagout) procedure in handling transformer disturbances?

The LOTO procedure is implemented to ensure that the equipment is properly isolated, preventing accidental energization or operation while the investigation and repairs are being conducted.

What happens after the maintenance team completes the investigation?

After the investigation, the maintenance team presents their findings and the necessary follow-up actions. The substation operator then releases the LOTO device to begin equipment normalization.

What role does the dispatcher play in the recovery process after the investigation?

The dispatcher from UP2B gives instructions to safely normalize the transformer following the investigation, ensuring the process aligns with safety protocols and maintains system stability.

How is the disturbance and recovery process documented?

The substation operator records the disturbance in the Voice or Force Outage Information System, including details of the incident, investigation, and recovery actions, to ensure proper documentation of the entire process.