基于PSCAD/EMTDC的配电系统电压跌落问题分析及其抑制措施研究

随着各种敏感设备在工业中的广泛应用,用户对电能质量的要求越来越高,电压跌落便是威胁电能质量的重要因素,已经成为影响许多用电设备安全正常运行最严重的动态电能质量问题之一.如何提高配电系统的电能质量,抑制系统电压跌落对敏感电力用户的干扰已成为急需解决的问题.建立了电压跌落的电磁暂态仿真模型;分析了线路故障造成电压跌落的情况;比较了不同故障地点对用户端电压跌落的影响.最后提出了抑制电压跌落的系统侧和用户侧应采取的相关措施.

Analysis of Voltage Sag in Power Distribution System Based on PSCAD/EMTDC and Research of Restrain Measurement

Along with the wide application of sensitive equipment in industry, the requirement of power quality from consumers becomes higher and higher. Voltage sag, which is the important factor to threaten the power quality, has become one of the serious problem of dynamic power quality that influence the safety and natural operation of a great many power devices. How to improve the dynamic power quality of distribution system and reject the disturbances on sensitive power customers caused by voltage sag are great significance. This paper build up the electromagnetic transient model of voltage sag,analysis the voltage sag caused by circuit fault. Circuit fault at different place which result in voltage sag to consumer are compared. In addition, measures to control voltage sag for utility and consumers are put forward..