Energy Cooperation Optimization in Residential Microgrid with Virtual Storage Technology

Abstract

The power balance of the tie-line is crucial to the stable operation of a community microgrid. This paper presents a power fluctuation smoothing method of the microgrid tie-line based on virtual energy storage technology. Firstly, the structure characteristics and the energy coupling mode of the combined heat and power system is systematically analyzed. Considering the operating characteristics of heat pumps, micro gas turbines, and buildings’ heat storage characteristics, a virtual energy storage model is established. Secondly, the target power of the tie-line is determined with the storage state indexes into consideration. Subsequently, a power allocation strategy which takes into account the correction of equipment state mapping set is proposed to allocate the tie-line power fluctuations to heat pumps, micro gas turbines, and supercapacitors. Simulation results show this method can realize the coupling coordination between heat and power energy and ensure the smoothing effect of the power fluctuations. Meanwhile, the control flexibility of the combined heat and power system can be enhanced, and the microgrid’s operating economy can be improved.

Multiobjective Model for Microgrids Integrating Electric Vehicles to Grid and Building Based on Interest Balance

“…To deal with these issues, the microgrid technology has been developed rapidly in recent years which consist of distributed energy sources (e.g., renewable energy resources, power generators, and storage system) and energy loads [2]. Te microgrid can provide a good opportunity to efectively improve energy utilization and reduce environmental pollution and is expected to play a signifcant role in building smart cities in many countries [3][4][5].…”