TY - JOUR
T1 - Disturbance observer based generalized wind/solar/battery consistent control strategy for AC microgrids
AU - Wang, Rui
AU - Sun, Qiuye
AU - Hu, Jingwei
AU - Jiang, Songchen
AU - Huang, Hailong
AU - Gui, Yonghao
PY - 2021/10
Y1 - 2021/10
N2 - 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.
AB - 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.
KW - distributed renewable energy
KW - disturbance observer
KW - wind/solar/battery consistent model
UR - http://www.scopus.com/inward/record.url?scp=85088233166&partnerID=8YFLogxK
U2 - 10.1002/2050-7038.12539
DO - 10.1002/2050-7038.12539
M3 - Journal article
SN - 1430-144X
VL - 31
SP - 1
EP - 12
JO - International Transactions on Electrical Energy Systems
JF - International Transactions on Electrical Energy Systems
IS - 10
M1 - e12539
ER -