Research On Coordinated Control Strategy Of Active Load And Distributed Power In Microgrid Operation

With the advent of the energy crisis,distributed power sources based on renewable energy are increasingly connected to active distribution network systems in the form of microgrids.The integration of distributed power sources is environmentally friendly and economical for future power systems.Development has a positive meaning.However,due to the randomness and instability of the distributed power supply,the distributed power supply grid-connected operation brings great difficulties to the safe operation of the power grid,strives to improve the power grid balance adjustment capability,fully exploits the regional absorption potential,and promotes distributed power supply.Prioritizing local consumption has become the focus of current research.Active load has become an important interactive resource for distributed power supply consumption in the current active distribution network because of its interactive response characteristics.To cope with the impact of distributed power supply growth and high permeability on the active distr ibution network power balance,The research content of the thesis will be carried out around the coordinated control strategy of active load participating in distributed power consumption.Firstly,the in-depth study on distributed power supply and active load model in microgrid operation mainly includes two aspects.First,the basic struc ture,operation control method and main distributed power model and output characteristics of the microgrid are carried out.On the other hand,the active load resources and demand response measures in the microgrid are studied,and the active load model and power consumption characteristics are analyzed.Secondly,this thesis studies the control strategy of active load participating in distributed power consumption in the operation of single microgrid.This part takes residential micro-grid as an example to carry out research.Through the analysis of user-side active load resources,the active load demand response of residents is established.The mathematical model proposes a coordinated control strategy for the active response of the active load and the distributed power supply in the microgrid operation.The simulation results show that the active load resources provide spare capacity for the operation of the microgrid system,effectively improving the local consumption of the distributed power supply and improving the reliability of the power supply of the microgrid.Finally,the distributed coordination optimization strategy of multi-microgrid combined operation system with active load is studied.Based on the above research,the coordinated interaction mode between multi-microgrid joint operation and distribution network is further considered,and the active load is proposed.The grid joint operation system establishes a two-level coordinated optimization model aiming at the distribution network stability and the optimization of distributed power supply consumption in multi-microgrid operation;the target cascade method is introduced into the optimization solution o f the model,through the distribution network and The decoupling operation of the tie line power between the microgrids realizes the decoupling of the distribution network and the microgrid operation constraints.Based on the example analysis of the improved IEEE14 node multi-microgrid system,the proposed model and optimization algorithm can greatly improve the near-distribution of distributed power supply and improve the power grid balance adjustment capability.