中圖分類號：TM761
文獻標志碼：A
DOI: 10.16157/j.issn.0258-7998.233962
引用格式： 陳思超，黃烈江，王鵬程，等. 一種兼具無功補償功能的電壓暫降治理技術(shù)[J]. 電子技術(shù)應(yīng)用，2023，49(11)：73-77.

A voltage sag mitigation technology with reactive power compensation function

Abstract： To solve the hybrid electric power quality problems in low-voltage network such as voltage sag and reactive power imbalance, a voltage sag mitigation technology with reactive power compensation function is proposed. As per the similarity of AC/DC converter and inverter unit, in this paper, a power quality control device based on dynamic voltage restorer is studied. When grid voltage is normal, in order to achieve the reactive power compensation function for the power grid system, the device calculates reactive compensation load needs and emits reverse current by takes real-time sampling of load current. When grid voltage sag occurs, the thyristor valve of device will be cut off, the supercapacitors of device acts as a power source and supplies power to the load through AC/DC converter. The experimental results indicate that this device has excellent performance in solving power quality problems, such as rapid dynamic response and short switching time between voltage sag control function and reactive power compensation function.

Key words : voltage sag；reactive power compensation；AC/DC converter；supercapacitor