无功功率是影响电压稳定和产生电损的一个重要因素，它关系到整个电力系统安全稳定的运行。

Reactive power is an important factor to the voltage stability and power lossing, and it is also related to secure and steady operation of the power systems.

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无功功率是交流电力系统设计和运行中的一个重要因素，它与电力系统的安全稳定和经济运行息息相关。

Reactive power is a crucial factor for the design and operation of ac power systems, and is closely bound up with the safety, stabilization, and economical operation of the power system.

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