Towards Space-time Cooperative Defence Framework against Blackouts in China

With investigation on recent blackouts around the world, the three-defence-lines criterion, which has been the security standard for power systems in China, is reviewed. An adaptive space-time cooperative framework, named as Wide ARea Monitoring Analysis Protection-control (WARMAP) for defending power system against blackouts is introduced in this paper. It upgrades the individual defence lines to a global scheme. Its essentials are: (1) acquiring wide area measures by using RTUs, PMUs, fault recorders, protection management systems and system protection schemes; (2) integrating all information acquired via various equipments into a unified platform; (3) performing trajectory-based data mining and quantitative security analysis for time response curves obtained by PMUs or simulations; (4) adaptive optimization of preventive control, emergency control, corrective control and recovery control; (5) coordination among these controls; (6) coordinatin among WARMAPs in a multi-layer power system. It is well on the way to building WARMAPs in a two-layer power grid in China, which consists of East China Regional Grid and Jiangsu Province Grid.