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。

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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。

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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。

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We discussed this as well as some other advantages DirecTV enjoys over its competitors in a recent article. (See DirecTV Subscriber Gains Continue.) Marketing campaigns drove subscriber additions in recent quarters and so far it has avoided any large scale blackouts similar to the ones experienced by Dish in pricing disputes with content carriers.

FORBES: DirecTV Gets Payoff In Stock Price For Subscriber Revenue Gains

Today, the best that can be said is that the extent and duration of future EMP-induced blackouts would depend on whether the emitter generates a small or large pulse, and whether it is detonated at ground-level or from high altitudes.

CENTERFORSECURITYPOLICY: The Blackout Next Time