它的频率、电压及电流“不足以对健康的人造成健康问题，”Cademartiri解释说。

Its electric frequency, voltage, and current "are not sufficient to create health issues in a healthy person," Cademartiri said.

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本文介绍了电网概况，分析了电网运行中存在的弱阻尼、动态电压支撑能力不足等主要问题。

Here, the general situation of South China power grid is introduced and the main problems in this grid such as weak damping and inadequate dynamic voltage supporting ability, etc.

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在无功优化计算中，由于严格的节点电压限制、网络拓扑的变化或无功电源的不足等多种原因可能会导致原问题不存在最优解。

In reactive power optimization, the solution infeasibility may arise due to a variety of reasons such as restrictive voltage limits, change in network topology, and shortage of reactive power sources.

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