The Commission has conducted a comprehensive study with the assistance of Manitoba HVDC research center on the failure on 27th September 2015 and observed some shortcomings.Among the shortcomings, the PUCSL noted that the dynamic transmission system model used by CEB transmission planning and system control branches are not accurate enough for dynamic response analysis, and the model data needs to be verified with field tests for system elements along with accurate modeling of loads. PUCSL says if the CEB does not agree with any of recommendations, communication should be made to the Commission on the same with justification, on or before 24th March 2016.The CEB has also been directed to design long term measures to avoid such system failures in future, after fully reviewing the system models used for both steady state and dynamic modeling. (Colombo Gazette) Further, the Commission highlighted that single element failure in the power system will not result in island wide power failures. “It is the responsibility of the Transmission Licensee (CEB) under Condition 30 of the Transmission License to maintain an uninterrupted power supply throughout the country, which has been violated three times in the last 6 months by way of island wide power failures. Therefore you are required to inform the Commission on actions transmission licensee has taken in order to prevent repetition of an islandwide power failure, after 27th September 2015,”PUCSL said. The Public Utilities Commission of Sri Lanka (PUCSL) has written to the General Manager of the Ceylon Electricity Board (CEB) stating that it is the responsibility of the CEB under Condition 30 of the Transmission License to maintain an uninterrupted power supply throughout the country.The PUC drew attention to the Island wide power failure on 27th September 2015, 25th February 2016 and 13th March 2016.