Arvin Giann Sunga

•Perform load flow and dynamic stability analysis using power system simulation software to establish system operating limits. •Prepare system operating procedures and operational guidelines for use by System Operator in the secure and reliable operations of the bulk power system. •Develop, implement, and maintain operational tools to aid System Operators in power system operations. •Assist in defining near real-time operational data requirements for substation and generator additions to the power system. •Achieve and maintain accreditation as a NERC certified operator. •Provide backup support for outage coordination. This process provides for the scheduling of planned outages in a secure and reliable manner, while balancing impacts to customers, economic dispatch, and adequacy of protection. •Support system operators in the real-time resolution of the forced outages by performing load flow and dynamic stability studies using power system simulation software. •Prepare short term operating instructions to assist system operators in secure and reliable power system operation under abnormal conditions. •Provide after-hours support to system operators as part of a stand-by rotation. •Prepare, deliver, and maintain presentation materials for system operators under a NERC structured training program. •Keep system models and training scenarios for the operator training simulator current, and use this tool to deliver training to system operators. •Maintain compliance with reliability standards as they pertain to the system security functions of control center operations.

• Coordinate and prepare planned distribution outages safely, efficiently, and with the least possible customers Affected. • Perform N-1-1 simulation to analyze the impact of planned transmission and sub-transmission outages, prepare possible contingency measures, and appropriately schedule the job in close coordination with NGCP-System Operator. • Coordinate execution of major projects involving system reconfigurations • Provide a study for the unloading of critically loaded distribution circuits, distribution system reliability, and distribution/sub-transmission system loss reduction. • Real-time monitoring and management of the operation of the Sub-transmission and Distribution system in accordance with customer specifications and regulatory requirements • Manage the timely restoration of forced outages. • Analyze and implement measures to mitigate the adverse impact of constraint/outages in the transmission / sub-transmission system in close coordination with the NGCP-System Operator. • Provide accurate and timely information regarding the status of the MERALCO grid. • Review and implement planned outages safely, efficiently, and with the least possible customers affected through Supervisory Control and Data Acquisition (SCADA), Advanced Distribution Management System (ADMS), and supervise switching line technicians. • Validates N-1 and N-1-1 simulation studies by National Grid Corporation of the Philippines (NGCP) on facilities in the Grid affecting the Meralco System • Investigate constraints in the power system during N-1 and propose a System Integrity Protection Scheme (SIPS) to mitigate the impact. • Study demand control schemes of Manual Load Dropping (MLD), Automatic Load Dropping (ALD), and Interruptible Load Program (ILP) to cope with generation deficiency. • Develop comprehensive restoration plans in coordination with the NGCP-System Operator (SO) during widespread Outages and total system blackouts.

• Assigned to lead the Inspection team in San Fernando Electric Light and Power Company (SFELAPCO) for applying new connections and apprehending consumers violating the Anti-Pilferage Act (Republic Act no. 7832). • Conduct field inspection of electrical facilities for applying new connections. • Analyze bill complaints (low and high consumption). • Conduct field surveys to address unbilled customers due to bill complaints.