A Robust Assessment Model of the Solar Electrical-Thermal Energy Comprehensive Accommodation Capability in a District Integrated Energy System

Abstract

As effective utilization of solar resources is a significant way to address the imbalance between energy supply and demand. Therefore, reasonably assessing the accommodation capability of solar energy is important. A two-stage robust evaluation model is proposed for the solar electricity-thermal energy comprehensive accommodation capability in a district integrated energy system. The accommodation capability index is constructed based on the second law of thermodynamics. A robust optimization model was adopted to deal with the uncertainty of solar irradiance. In the solution procedure, the non-convex non-linear power flow model is transformed into a second-order cone model to effectively fit the proposed two-stage robust evaluation model. Finally, a case study verifies the effectiveness of the proposed model and the solution method. The influence of irradiance fluctuation range, gas boiler, and energy storage is discussed in detail.

An Enhanced Second-Order Cone Programming-Based Evaluation Method on Maximum Hosting Capacity of Solar Energy in Distribution Systems with Integrated Energy

“…Solar energy has been widely deployed in the world with its huge potential in reducing carbon emissions. There are mainly two kinds of technologies of harvesting solar energy: photovoltaic (PV) and solar collector (SC) [1,2]. However, the output power of PV or SC from solar energy is intermittent and susceptible to the meteorological conditions, which will pose new challenges to the operation of distribution network (DN).…”

“…Nowadays, many references have carried out research on the distributed renewable energy sources hosting capacity problems. Most of the research findings primarily concentrate on hosting capacity of three ways, as shown in Table 1: (1) based on microgrid (MG) [4][5][6], (2) based on active distribution network (ADN) [7][8][9][10][11], and (3) based on integrated energy distribution system (IEDS) [12][13][14][15].…”

Assessment of the solar energy accommodation capability of the district integrated energy systems considering the transmission delay of the heating network

“…Ref. [20] concluded from the evaluation of the solar energy accommodation capacity of IESs that the comprehensive application of PV and solar collectors (SCs), combined with the CHP, gas boilers (GBs) and other energy conversion equipment, can effectively improve the solar energy accommodation capacity of IESs.…”

“…The above-mentioned researches are mostly limited to the integrated solar energy consumption of buildings, and few of them focusing on the IES including energy networks do not consider the differences in time-scale characteristics in the research of solar energy accommodation involving multi-energy carriers [20][21][22]. In reality, the IES is essentially a complex system with multiple time scales as it involves different energy carriers such as electricity and heat.…”

“…In addition to the specific methods and influencing factors of solar energy accommodation assessment, indicator establishment of the solar energy accommodation capacity is another emphasis of the assessment process. Some researches try to establish representative indicators such as the actual total output of solar energy equipment [4,6,24], the installed capacity of solar energy equipment that can be accommodated by the systems [9,20], the ability of a given system to flexibly integrate fluctuating solar energy output [8,25] and the annual investment cost of solar energy equipment considering economy [6,8]. However, the researches mentioned above also do not consider the multiple forms of the solar energy accommodation, which brings about the problem of how to evaluate different energy carriers for the indicators establishment of the solar energy accommodation capacity.…”