中文摘要：

为有利于电力系统停电防御体系的进一步发展,讨论电力系统的广域保护,包括广域设备保护和广域系统保护的功能、控制方式及系统结构;回顾其信息采集、知识提取和控制决策方面的进展。从理论和应用相结合的观点剖析广域后备保护的可行性、困难和发展方向;指出需要在算法与受扰轨迹的知识提取上取得重大突破,并与数值仿真相结合,才能真正发挥相量测量单元在广域保护中的作用;强调按风险观点将广域保护与预防控制及传统保护协调的重要性。

英文摘要：

For the further development of framework for defending blackouts,we discussed the functions,control modes and system structures of wide area protection of electric power systems,which include wide area equipment protection systems and wide area system protection systems,and reviewed recent developments in the information acquisition,knowledge extraction,and decision making of wide area protection systems.Moreover,from a viewpoint of combining both theory and application,we discussed the feasibility and further development of wide area backup protection.It is pointed out that major breakthroughs should be made in algorithms and knowledge extraction technologies from disturbed trajectories,and numerical simulations should be combined,so that the advantages of phasor measurement units can be fully utilized in wide area protection systems.It is also emphasized that wide area protection systems should be coordinated with preventive control and conventional protection from the viewpoint of risk management.