| Micro-grid is widely used in the field of distributed power generation because of its long-term renewable energy consumption mechanism.In the future,China is going to build the new power system with new energy as the main power supply.Facing the power grid and load demand which is more complicated,even the more randomness and volatility distributed generation output.It is beneficial supplement of improving the economic benefits of microgrid by considering the demand-side response.The flexible load is an important part of demand-side response,the important link of strengthen the integration of power system"source-network-storage-load".And yet,affected by complex factors such as power system structure and social environment,the responsiveness of flexible load is insufficient at present.It is too difficult to give full play to its advantages of economy and flexibility.Thus,in this thesis,an economic operation scheme of multi-power cooperative microgrid considering the responsiveness of flexible load is proposed-The uncertain factors of flexible load scheduling is deeply studied.This thesis has improved the identification degree of flexible load,and established the dynamic compensation model of flexible load dispatching.The specific content are as follows:a.First of all,this thesis established the operation model of multi-power cooperative microgrid.Considering the influence of different distributed power which is of great putrandomness and volatility on the economic operation of microgrid.An economic model of microgrid operation is established.This thesis performed simulation verification by setting up four different microgrid operating environments.The calculation results show the comprehensive economic benefits and consumption level of microgrid operation.b.This thesis base on the model of consumer psychology,established the flexible load model,which considered the potential of load dispatching.In this model,to improve the identification degree of flexible load,the solution method of load dispatching decision coefficient is established.Furtherly,established the solution of flexible load maximum dispatch potential factor,and the solution of user scheduling willingness potential factor.In the end,to make the scheduling scheme more reasonable,the dynamic compensation mechanism of flexible load scheduling is established.c.At last,based on the model of flexible load established by this thesis,an example is analyzed in the aim of the lowest cost of the microgrid operation.Verified the impact of flexible load dispatch on the economic benefits of microgrid operation through four different microgrid operation scenarios.The example results showed that,the flexible load model considering load dispatching potential which establishe by this paper can improve the load demand curve of microgrid with different responsibility.In addition,the operation scheme of microgrid which considered flexible load gains long time economical benefits. |
