Progress Report of Planning Interconnection Sub Working Group Presented to The 8 th Meeting of HAPUA Working Group No.2 - Transmission Kuala Lumpur, Malaysia 6 th October 2010 by Dr. Thana Boonyasirikul

Presented to The 8 th Meeting of HAPUA Working WG No.2-Transmission 2 The Meeting of APGCC#5 & HAPUA WC#11 (9-11 November 2009, Chiang Mai, Thailand) Presented the generation results of AIMS-II based on the input of 11 September 2009 The Meeting of PI SWG - Transmission Team #2 (1-3 December 2009, Bangi, Malaysia) Set up the Transmission Study Methodology The Special Meeting of PI SWG - Transmission Team : Sub System A (29 December 2009, Udon Thani, Thailand) -Transmission analysis was partially done for selected years -Transmission data of Laos System were received -Agreed to simplify transmission data of Myanmar and Vietnam The Meeting of PI SWG - Transmission Team #3 (3-4 March 2010, Bandung, Indonesia) -Discussion on preliminary results of Power System Study -Agreed on minor changes of criteria and assumption on Power System Study -Updated APGCC Work Plan The Special Meeting of WG2:Transmission-PI SWG (Discussion on AIMS-II) (28 June 2010, Petchburi, Thailand) -Key Finding and Issues of AIMS-II Generation Report -Discussion on AIMS-II Transmission -Results of the Steady State and Dynamic Simulation Related Meeting Events ( )

Presented to The 8 th Meeting of HAPUA Working WG No.2-Transmission 3 Completion of AIMS-II *Report on Generation System Study was circulated to Member Countries on 24 May 2010 *Minor corrections were made upon member comments and resubmitted to all members on 14 September 2010 *Member countries accepted AIMS-II results and reports prepared by PI SWG. *Submission of AIMS-II Final Results to member countries on November 2010 *AIMS-II can be used as a reference for implementation by concerned parties. Further studies are required to be carried out as necessary. Conclusions and Recommendations -The study indicates a saving of 788 MUSD with ASEAN interconnection network which is based on the data dated 29 September It is noted that the nature of input for AIMS-II study is dynamic. The result should be referred to the date of data availability. -The final AIMS-II report shall be composed of 4 reports, Generation System Study, Transmission System Study, Appendix and Executive Summary. Works Accomplished and Outcomes

Presented to The 8 th Meeting of HAPUA Working WG No.2-Transmission 4 Work Plan for AIMS-II Report AIM-II ReportLeaderStatusSubmission Generation System Study Report EGAT, Thailand Completed 6 th APGCC, 12 th HWC and 26 th Council Transmission System Study Report TNB, Malaysia Completed8 th Meeting of HAPUA WG No.2 Appendix EGAT and TNB Completed8 th Meeting of HAPUA WG No.2 Executive SummaryNPC, Philippines In progressPrior the 13 th Working Committee Meeting

Presented to The 8 th Meeting of HAPUA Working WG No.2-Transmission 5 Issues to be completed by a week after the 4 th Meeting *The PI SWG Leader requested all member countries to provide the statistical data of peak demand (MW) and energy demand (GWh) for the first 6 months of 2010 to Thailand delegate for the data collection. Issues to be examined by a week after the 4 th Meeting -Assumptions for Energy Price/Fuel Price shall be examined/identified to be put in the generation study report AIMS – II Report Structure is changed to: Volume I – Executive Summary Volume II – Generation Study Report Volume III – Transmission Study Report Volume IV – Appendices - Terms of Reference - Power Interconnection Sub working Group - Work Plan of Power Interconnection Sub Working Group - Power Development Plans of ASEAN Member Countries - Power Flow/Stability Diagrams (hard copy / CD files) Findings from the 4 th Meeting of PI SWG

Presented to The 8 th Meeting of HAPUA Working WG No.2-Transmission 6 Harmonization of Reliability Criteria for ASEAN Countries Future Work Plan Discussion on reliability criteria and data requirement for Planning Criteria Establishment of common reliability criteria and assumption Data collection and implementation Discussion on harmonization and validation of results Establishment of reliability criteria for the benchmarking of planning criteria among ASEAN countries Comparison reliability criteria among ASEAN countries Amendment and fine-tune Not Applicable Applicable

Presented to The 8 th Meeting of HAPUA Working WG No.2-Transmission 7 Harmonization of Reliability Criteria Tentative Schedule

Presented to The 8 th Meeting of HAPUA Working WG No.2-Transmission 8 Harmonization of Reliability Criteria Tentative Schedule

Presented to The 8 th Meeting of HAPUA Working WG No.2-Transmission 9