Study On Emergency Response Mechanism Of Large-scale Blackout Of Regional Power Supply Bureau

With the development of economy and society, the power load is growing rapidly. In 2014, the total electricity consumption of Dongguan City reached 66.099 billion kwh, an increase of 6.18% over the same period of last year. Society’s dependence on electricity supply is increasing, so is the pursuit for safe and reliable electricity supply. In recent years natural disasters and facility failures have resulted in frequent large-scale blackouts at home and abroad, such as the "8.14" America and Canada blackout in 2005, "9.25" Hainan power grid blackout in 2005 and so on. The blackout exerts a very big impact on public safety, social and economic development and people’s lives. Our country is attaching growing importance to emergency management, by improving relevant laws and regulations, regulating electricity emergency disposal work, defining emergency management responsibilities and enhancing emergency response capacity, thus to prevent and reduce blackouts caused by improper emergency management.By analyzing triggering elements, development process and emergency response of several blackouts, such as the Hainan power grid blackout on September 25, 2005, Shenzhen power grid blackout on April 10, 2012, Dongguan power blackout on April 11, 2014, and so on, it is shown that reasons for the large-scale power blackout can be divided into natural disasters, external damage, equipment failure, human error and others.Grid in Pearl River Delta region is vulnerable to extreme climate like tornadoes, torrential rains, typhoons, snow and ice and so on. With the moving forward of “West power transfer to east” strategy and hydropower stations driven away from load centers, failure of components or regional disasters are likely to spread rapidly, greatly increasing the risk of blackouts. By taking Dongguan Power Supply Bureau for instance, this article studies the size of Dongguan grid, operation mode, the peak load, the unit output, power flow and stability of the cross-section, weaknesses in grid infrastructure, as well as emergent settlement of three cases of natural disaster.For risks of large-scale power blackout, it is first proposed to improve concept of power grid structure, by carrying out power grid construction and wind-proof reinforcement work of power transmission and distribution wires, thus to reduce or eliminate the risks. Secondly, through a systematic study of the power emergency mechanism, it is suggested to improve grid blackout restart scheme as well as emergency management system, organizational system, emergency plan drills, integrated security, building of emergency response teams and emergency response capacity.