A Novel, Stable, and Economic Power Sharing Scheme for an Autonomous Microgrid in the Energy Internet

Energies

Bingke Yan²  Bo Wang²  Lin Zhu¹  Hesen Liu¹  Yilu Liu¹  Xingpei Ji²  Dichen Liu² 

[1] Department of Electrical Engineering and Computer Science, the University of Tennessee, Knoxville, TN 37996, USA;School of Electrical Engineering, Wuhan University, Wuhan 430072, China;

关键词: microgrid;    energy internet;    plug-and-play;    multi-objective optimization;    integral of time-weighted absolute error;   

DOI  :  10.3390/en81112338

来源: mdpi

【 摘 要 】

With a higher penetration of distributed generation in the power system, the application of microgrids is expected to increase dramatically in the future. This paper proposes a novel method to design optimal droop coefficients of dispatchable distributed energy resources for a microgrid in the Energy Internet considering the volatility of renewable energy generation, such as wind and photovoltaics. The uncertainties of renewable energy generation are modeled by a limited number of scenarios with high probabilities. In order to achieve stable and economical operation of a microgrid that is also suitable for plug-and-play distributed renewable energy and distributed energy storage devices, a multi-objective optimization model of droop coefficients compromising between operational cost and the integral of time-weighted absolute error criterion is developed. The optimization is solved by using a differential evolution algorithm. Case studies demonstrate that the economy and transient behavior of microgrids in the Energy Internet can both be improved significantly using the proposed method.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.