Power decoupling strategy based on ‘virtual negative resistor’ for inverters in low-voltage microgrids

• Published in: IET power electronics Vol. 9; no. 5; pp. 1037 - 1044
• Main Authors: Zhang, Ping, Zhao, Hengyang, Cai, Huanyu, Shi, Jianjiang, He, Xiangning
• Format: Journal Article
• Language: English
• Published: The Institution of Engineering and Technology 20.04.2016
• Subjects: Decoupling; distributed power generation; Electric power grids; grid‐connected inverter system; Impedance; inductive system impedance; Instability; Inverters; invertors; microgrids; power 6 kW; power decoupling; reactive power control; resistive line impedance; Resistors; Stability; Strategy; virtual inductor; virtual negative resistor; virtual resistance; voltage regulator; voltage regulators; inductive system impedance; power 6 kW; voltage regulator; virtual resistance; distributed power generation; virtual negative resistor; grid-connected inverter system; invertors; voltage regulators; virtual inductor; power decoupling; microgrids; resistive line impedance; inverters; reactive power control

In a low-voltage microgrid, due to the effect of mainly resistive line impedance, the conventional P/w and Q/E droop control is subject to the coupling and dynamic instability of the real and reactive power control. To address this problem, a novel virtual impedance composed of virtual negative resi...