Compound Energy Market Based On Hybrid Photovoltaic/thermal Solar System

As a kind of important renewable energy source,solar energy is related to national energy security and energy-efficient development.In recent years,distributed photovoltaic technology has developed rapidly and been used widely due to its advantages of environmental protection and land conservation.The "Notice on Matters Related to Photovoltaic Power Generation in 2018" promulgated in May 2018 has been reducing the subsidy on PV project,which has pushed the solar industry into the quality era from the speed era.Strategies of power marketing mechanism reform such as power sale markets opening and “photovoltaic+” development in science and technology have become new routes for the transition period of photovoltaic industry.Based on the background of the power market reform,a microgrid trading system for the supply-demand relation in distributed photovoltaic power market is established,which stipulates that power generation users have the right to "purchase surplus power in microgrid preemptively".The order of microgrid transactions is established based on this right.In turn,the participants in the three transaction stages are the group of power generation users,the power generation users and the the group of non-power generation users,the microgrid and the large power grid.According to the conditions of occurrence and the results of the transactions,the possible situations are divided into 10 kinds.Based on the benefit function of the power generation user and the expenditure function of the power user,modes of all different possible transaction situations are built.In order to reduce the total expenditure of power users and improve the total benefit of power generation users,the break-even points of some mathematical models are proved and analyzed by using the game theory.At the same time,advice on the electricity price of the micro-grid and the electricity consumption in the power generation users are given.Then the microgrid system based on photovoltaic power generation is extended to the microgrid system based on PV/T technology.The experimental result of the PV/T system is compared with traditional combined heat and power generation to show the low quality of hot water from the PV/T system.Consumption objects,metering methods and equipment facilities in heat supply network are planned.Three different thermoelectrical sales models are discussed by numerical simulation,which verifies the superiority of mixed bundled sale.Some thoughts on thermoelectric marketing models actually are present.Finally,an industrial park in Jiangsu Province is taken as an example to simulate the compound energy market based on PV/T system.The participants' income has been improved to a certain extent.Purchase expense of consumers is reduced significantly because as the leader,consumer determines the internal electricity price in the static game of non-cooperative incomplete information.The amount of interaction between the microgrid and the large grid has declined,reducing the users' dependence on the large grid.The low-temperature hot water that could not be absorbed is also fully commercialized through the trading of compound energy market.