Study on energy flexibility ability of distributed energy resources within zero energy houses

Developing distributed energy efficiency measures is considered a critical solution toward the sustainable transition to decentralized and decarbonized building energy systems. This work selects zero energy houses and in Kyushu as the research objectives, explored the flexibility performances and potential of different distributed energy resources, and evaluated the operation of grid interactive dispatch . Thus, providing the references for policy worker. IN CHAPTER1, highlighting the carbon reduction efforts in residential sector. The challenges associated with rising renewable penetration and the importance of demand-side participation have been introduced. IN CHAPTER 2, characteristics and attributes of decentralized and low-carbon energy technologies in residential building for enhancing energy efficiency and reducing carbon emissions are described. IN CHAPTER 3, using behind-meter data, providing the detail performances of house energy consumption, generation. In CHAPTER 4, firstly introduced the energy flexible building concept, then the modeling process of heat pump water heater, battery storage and building thermal mass are described in detailed. CHAPTER 5 focusing on increasing the on-site PV generation and reducing energy cost, this chapter described the flexible dispatch performances of distributed PV, home heat pump, battery storage systems. In CHAPTER 6, explored thermal energy flexibility of building thermal mass, case studies were presented to investigate the optimized performances of flexible space heating systems using model predictive control. This chapter also uses optimization model to achieved the trade-off between energy consumption and indoor thermal comfort conditions. CHAPTER 7 using real-world data (supply-side data, spot price, demand-side data), optimized results compared scheduling performances of the distributed energy resources under fixed feed-in tariff and dynamic spot price, assessing their ability to contribute to grid flexibility. CHAPTER 8 is CONCLUSION AND PROSPECT. Summarizes the conclusions of each chapter and the optimization strategies of distributed energy resources usage were proposed.