Research On Planning Of Multiple Flexible Resources In Power System Under Low Carbon Economy

In order to cope with the shortage of energy supply,environmental pollution,global warming and other issues,the power energy structure is gradually transforming to a low-carbon structure,and the vigorous development of clean energy such as wind and solar energy has become an important consensus for countries around the world to achieve sustainable power development.However,due to the large volatility and uncertainty of wind,solar and other new energy output,the large-scale access to the system will bring a severe test to the operational flexibility of the system.Making good use of the flexibility resources of the source,load and storage side can ensure that the power system has enough flexibility to improve the wind power consumption capacity of the system.Therefore,considering the flexible resources of source,load and storage,a power system operation optimization model with multi-type flexible resources in low-carbon economy is constructed.Based on this model,the planning problem of multiple flexible resources in low-carbon economy is studied.The main research contents are as follows:(1)This paper analyzes the characteristics of power system flexibility,deeply excavates the flexibility demand sources of power supply side and load side,constructs the mathematical relationship between the supply capacity of flexibility resources and its operation state,and puts forward the flexibility evaluation indexes applied to the operation and planning model for evaluation and analysis.(2)Considering the flexible resources of source,load and storage side,the flexibility balance mechanism and the coordination operation of multiple flexible resources are combined,besides the carbon trading mechanism is introduced in the scheduling process.The flexibility margin indexes are introduced as an important index to reflect the regulatory capacity of various types of flexible resources.An economic dispatch model of power system with multiple flexible resources based on carbon trading is proposed.Taking RTS96 system as an example,this paper analyzes and demonstrates the model and method proposed in this chapter,analyzes the promotion of various flexible resources on wind power consumption in different scenarios,and studies the impact of wind power capacity of the access system and different carbon trading methods on the optimal operation of the system.(3)Based on the improved k-means clustering algorithm,typical scenarios of wind power are constructed,and considering the flexible resources of source,load and storage,a planning model of multiple flexible resources for power system under low-carbon economy is constructed.The objective of the model is to minimize the sum of operation cost and investment cost of the system.The model is compared with the planning model considering different flexible resources,and the influence of different wind power penetration on power planning is explored.