Evaluation On The Employment Potential Of Demand-side Flexible Resources In Power Systems

After the reform and opening up,China’s economy has made a leap-forward growth,and the demand for the power industry has gradually increased.China has successively established a number of ultra-high-voltage and ultra-high-voltage transmission lines,and the nation’s power network has become increasingly complex.At the same time,with the consumption and waste of a large amount of non-renewable energy,China’s energy is in a hurry,environmental problems are becoming more and more serious,and it is urgent to find new and alternative energy sources to continue to supply power stably.In this context,new energy power generation came into being and has broad application prospects.However,a series of problems such as unstable power generation and difficult to solve the problem of new energy power generation have seriously restricted its large-scale development.At the same time,with the improvement of people’s living standards,the demand side’s power load shows a continuous growth pattern.How does the system control the demand side’s power consumption and the power supply side to balance the power consumption peak and underestimate the load difference to ensure the system? Safe and stable power supply is also a major problem facing the system.This thesis first considers the power output characteristics from conventional power generation,photovoltaic power generation and wind power.From the demand side,the load characteristics of the three loads of the load,the transferable load and the load reduction can be considered.The law and irrationality of distribution and demand distribution put forward the problems that restrict the difficulty of new energy power generation in China.After considering the impact of unit start-stop on demand response,the study establishes relevant models,finds corresponding solution algorithms,and evaluates indicators and benefits.It is concluded that the optimization algorithm that does not consider the start and stop of the unit may reduce the cost of power generation,but it may cause the formation of peak price.Considering the start and stop of the unit,the power generation side will increase the corresponding income due to the increase in electricity price,but the electricity is used.The side does not necessarily benefit from this;the comprehensive benefit analysis shows that the power generation side is almost unrecognized and is occupied by the power side.The marginal benefit analysis further indicates that the demand response needs to fully mobilize the enthusiasm of the users on the power side,only with the power generation side.Only benign interactions can achieve maximum social benefits.Based on the study of the impacts of market environment,this thesis proposes to establish two demand-responsive virtual power plant models based on incentives and electricity prices and a demand-response energy market model.Under the maximum market total revenue target and other constraints,the four cases are calculated.Electricity and electricity prices,and concluded that incentives and electricity-based demand response can effectively cut peaks and fill valleys,load curve becomes more gradual,reduce the number of starts and stops of the unit,improve the power generation efficiency of the generator set,and increase the low electricity price.Reduce the peak electricity price and clear the electricity,improve the total social income,and improve the operational safety of the power grid.