Interharmonic is special harmonic in electric power systems.

间谐波是电力系统中一种特殊的谐波。

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Transmission line fault location is an important problem in electric power systems.

输电线路故障定位一直是电力系统急需解决的难题。

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This problem has become more obvious especially as computers are commonly employed in electric power systems.

特别是计算机在电力系统中的普遍应用，使这一问题更为突出。

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Morgan Stanley will own and finance solar electric power systems from SunPower on seven other Wal-Mart facilities in California.

FORBES: Magazine Article

In the power systems business that manufactures and sells a variety of engines and diesel-electric locomotives, sales were driven by petroleum and rail applications.

FORBES: Caterpillar's Shares Look Cheap On Recovery Prospects

In 2009, this newspaper reported that the control systems for the U.S. electric power grid had been hacked and secret openings created so that the attacker could get back in with ease.

WSJ: Richard Clarke: China's Cyberassault on America