At present, Urban electricity system exists unstable factor, for guaranteed the normal supply of power for computer and network system, UPS should be used to supply uninterrupted electric power.

目前，我们现有的市电系统存在不稳定因素，为保证计算机和网络系统的供电正常，应使用UPS不间断供电电源。

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This paper discusses the improvement of efficiency and economy of power supply and consumption in power system and urban power network and the rationality of the existing electricity pricing policy.

就提高电力系统、城网供用电的效率和经济性与目前电价政策的合理性问题进行了探讨。

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