Research On Cross-provincial And Cross-regional Trading Methods To Promote High Proportion Of Renewable Energy Consumption Under Renewable Portfolio Standard

High efficiency,cleanliness and low carbon have become the mainstream direction of energy development in the world.Renewable energy sources represented by wind power and photovoltaic power have achieved rapid development in recent years.In order to effectively consume renewable energy sources,China has adopted fixed subsidies to simulate its development in early stage,which however can’t be implemented for a long time because the source of subsidy lags far behind the expenditure.The application of renewable portfolio standard and tradable green certificates can encourage the effective renewable energy consumption by means of market forces.With the existence of renewable portfolio standard,the renewable energy electricity market,the green certificate market and the conventional energy electricity market are related to each other.For renewable energy generators participating in the transactions in these three markets,they are faced with high investment costs in the absence of the original sustained and stable subsidies.Therefore,it is important for renewable energy generators to improve its income level continuously and stably through market strategy optimization,with the purposes of maximizing the consumption rate of renewable energy.In this context,the main work of this thesis is as follows.(1)The market resource transfer relationship between green certificate market and electricity market is sorted out.Based on the connotation of renewable portfolio standard,this thesis analyzes the resource transfer relationship between renewable energy electricity,conventional energy electricity and tradable green certificate market,which take renewable energy generators,conventional energy generators and sellers as trading subjects,and analyzes the applicability of the system dynamics model to simulate the market subject decision making.(2)The value transmission model of green certificate market and electricity market at macro level is established.This thesis analyzes the internal relation between the tradable green certificate market and the electricity market,the spot market and the medium and long term market.A system dynamics model is built involving the medium and long term renewable energy resource contracts,medium and long term conventional energy contracts,electricity spot market,tradable green certificates market and other modules,as well as the relationship between market price and demand transmission.The influence of different quota proportion on the market strategy of generators in different markets is simulated.(3)The operation strategy model of renewable energy generators green certificate market and electricity market at micro level is established.Based on the change trend of the price of tradable green certificate simulated by the system dynamics model,a two-layer optimization model for the generators’ bidding in the spot market considering the benefits of tradable green certificate is established.The upper layer takes the generator as the decision-making subject to maximize the benefits in spot market and tradable green certificate market,while the lower layer takes the independent system operator as the decision-making subject to clear the spot market.This thesis discusses the influence of the price of tradable green certificate,the proportion of medium and long term contracts and the proportion of quota on the market strategy of generators.(4)The asynchronous joint simulation of tradable green certificate market and electricity market based on Vensim and Matlab is carried out.The upper layer is the tradable green certificate trading model with the unit of day,which is realized by system dynamics.The price of the tradable green certificate output from the upper simulation is transferred to the lower power spot market trading model in hours.After completing the 24 h simulation of the spot market,the supply and demand relationship of the new tradable green certificate is formed and transferred to the upper layer for the simulation of the next time section.The influence of the proportion of medium and long term contracts on the profits of generators and the consumption of renewable energy is simulated.