Analysis of "8•15" Blackout in Taiwan and the Improvement Method of Contingency Reserve Capacity Through Direct Load Control

Electric power has been one of the most important energy for modern cities. Therefore, blackouts always have great impacts on our modern societies. This paper reviews the process of the large-area blackout in Taiwan on August 15^th, 2017. The direct cause of the accident is the incompetence of an employee in the natural gas company, while the fundamental cause is the shortage of the contingency reserve capacity (CRC). Faced with the insufficient installed capacity in Taiwan, this paper proposes an improvement method of CRC through direct load control. A control framework, on account of the system frequency and the gas pipeline pressure, is developed to regulate the power consumption of demand side resources (DSRs). Besides, a droop controller is also proposed to determine the regulation capacity of DSRs. The effectiveness of the proposed control strategy is verified by the numerical studies.