Disturbance observer based generalized wind/solar/battery consistent control strategy for AC microgrids. (20th July 2020)

• Record Type: Journal Article
• Authors: Wang, Rui; Sun, Qiuye; Hu, Jingwei; Jiang, Songchen; Huang, Hailong; Gui, Yonghao
• Is Part Of: International transactions on electrical energy systems. Volume 31:Number 10(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-07-20
• Subjects: distributed renewable energy -- disturbance observer -- wind/solar/battery consistent model; Electric power -- Periodicals; Electric power systems -- Periodicals; Electrical engineering -- Periodicals; 621.3
• DOI: 10.1002/2050-7038.12539
• Languages: English
• ISSNs: 2050-7038

Abstract

Summary: Although the distributed renewable energy source is an advisable solution for ac microgrids to reduce fuel consumption and CO2 emission, the fluctuation and uncertainty of renewable energy source also brings significant problem to the safe and stable operation. Based on this, a disturbance observer method based on generalized wind/solar/battery consistent model is proposed in the primary control level. Firstly, it is through establishing the analogy model between the interface wind rectifier circuit and the interface solar/battery boost circuit that the equivalent model of the isomorphic solar/wind/battery with single input and single output (SISO) is first proposed in this article. With this effort, the wind, solar, and battery can achieve the consistency of the generalized model, which reduces the design complexity of the following control strategy. Furthermore, in order to solve the fluctuation and uncertainty problems, a continuous‐time disturbance observer is introduced to control the equivalent generalized SISO model, which can achieve quick response, stable operation, and no‐difference adjustment under disturbance. Finally, the effectiveness of the proposed method is verified by simulation results.