供电系统的电压下凹

随着用电设备的技术更新，尤其是数控技术广泛应用于工业生产，用户对供电系统的电压质量提出了更高的要求，欧美发达国家在80年代初就开始了供电电能质量方面的研究并取得了重大应用成果，并于90年代初制定了相应的标准，对电压下凹和上凸进行限制，介绍了电压下凹和上凸的基本概念，危害及其预防措施，并对中国今后在此方面的工作提出了建议。

VOLTAGE DIP IN POWER SUPPLY NETWORK

With the technical renovation of electrical driven equipment, especially the wide application of digital control technique in industrial manufacture, a higher requirement to the power quality is put forward by the consumers. Since early 1980s the research on power quality has been performed in United States and European countries, and a large amount of achievements are obtained. At the beginning of 1990s, the relevant standards are established to restrict the voltage dip and voltage swell. In this paper the basic concepts of voltage dip and voltage swell, their affections and the countermeasures to prevent them are presented. The relevant works to be carried out in China for the future are suggested.