Economic Dispatch Of Park Type Integrated Energy System Considering The Combined Effects Of Multiple Random Factors

With the aggravation of energy crisis and environmental pollution and increasing demand for multiple energy,improving energy efficiency,reducing pollutant emissions and improving the convenience of energy consumption have become the main purpose and method of energy transformation.The integrated energy system,which product and schedule multiple energy uniformly through a certain physical composition and communication architecture,is a branch of the Energy Internet concept.Because of the convenience of managing,park type integrated energy system can greatly promote the local consumption of new energy power generation,effectively reduce the wind and light abandoning,thus has good application effect and prospect.As the renewable energy improves the economic and environmental protection of the system,the fluctuation and randomness of wind,photovoltaic and load also bring new scheduling problems to the system.Uncertainty will increase the operating cost of the integrated energy system,and even threaten the safety of the system.In order to reduce the impact of uncertainty on the system and reduce the operational risk,need to study the impact of uncertain factors on the system’s economic dispatch and limit the risk level.Considering the feasible region model of CHP unit,this paper proposes an economic dispatch model based on the super quantile method for the park type integrated energy system,and verifies it in the form of an example.The main achievements of this paper are as follows:Firstly,analysis the trend of energy development,and emphasize the characteristics of the park type integrated energy system.The output feature and cost calculation methods of the core equipments are analyzed.Based on the characteristics of the equipments and the basic laws of the network,establish network models of the electric,thermal and gas subsystems.Secondly,propose two kinds of feasible domain model of CHP unit and carry out the related mathematical description.A direct calculation method of fuel cost based on the numerical value of heat and electric power is proposed to adapt to the feasible domain model.The model simulation is carried out in a real park type integrated energy system.The simulation results verify the validity of model and accuracy of the calculation method of thermoelectric decoupling.Thirdly,considering many random factors,put forward the stochastic simulation method based on Latin Hypercube Sampling.In order to quantify the influence of multiple random factors,an economic dispatch model based on the superquantile method is proposed and a improved system is used as an example to simulate.The simulation results show that the addition of fuel cell and energy storage system makes the overall scheduling cost significantly reduced,and the scheduling mode is more flexible.The economy of the system is reduced with the increase of confidence level,at the same time,the higher the risk threshold,the better the economy of scheduling.The confidence level also affects the quantile and superquantile.The higher the confidence level is,the higher the quantile and superquantile.Under the same confidence level,the existence of risk tail effect makes the superquantile slightly higher than the quantile.