In recent years, a series of cascading large blackouts have occurred in some countries, which caused huge social economy loss.
近年来，各国相继发生连锁大停电事故，造成巨大的社会经济损失。
A large number of blackouts are influenced by voltage instability directly or indirectly in the world, so voltage instability is given more and more attention.
在世界范围内，直接或间接地由电压稳定造成的停电事故很多，电压稳定问题得到了日益的关注。
Several large scale blackouts happened both domestic and abroad approve that ensuring securely and the stable operation of power systems are becoming more and more difficult.
近年来国内外发生的多起大停电事故表明，保证电力系统安全稳定运行的难度正在逐渐加大。
In recent years, large area power blackouts occurred in many cities at home and abroad and caused enormous damage to society.
近年来，国内外许多城市相继发生大面积停电事故，给社会造成了巨大的损失。
Protection system hidden failures is one of the main causes of large-scale blackouts, which inevitably will lead to disastrous consequences of power grids from cascading failures.
继电保护系统的隐藏故障是造成大规模停电事故的罪魁祸首之一。
Recently, successive power blackouts of large scale occurred in the world, which attracts researchers' attention to the reliability of power grid.
近来，世界范围内接二连三地发生大规模电网停电事故，引起人们对电网可靠性的高度关注。
Recently, successive power blackouts of large scale occurred in the world, which attracts researchers' attention to the reliability of power grid.
近来，世界范围内接二连三地发生大规模电网停电事故，引起人们对电网可靠性的高度关注。
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