Thermostatically Load Control And Communication Resource Allocation Strategy For Power Demand Response

In smart grid,the main way for power users to participate in power system frequency regulation is demand response.The Automatic Generation Control(AGC)meets the ever-changing user power requirements and keeps the system in an economical state of operation.The implementation of the direct load control scheme depends on the two-way communication network of the demand-side.Moreover,the transmission error of the load operation status and control command information will reduce the accuracy of load control and cause random deviation of load tracking.Thus requiring more AGC services,which in turn increases the cost of the power company.In addition,the reduction of load control accuracy will reduce the d egree of indoor temperature changes and increase the comfort of users.This paper formulate an analytical model for the influence of information transmission error on load tracking performance.The Fanger thermal comfort model is used to describe the user' s uncomfortable cost against the load status.And the cooperative relay technology is used to reduce the packet loss rate of communication between the power company and the user.Furthermore,this paper construct the collaborative optimization problem of load control and relay transmission.The specific research contents are as follows:Firstly,this paper introduce the composition of temperature control load and temperature control load aggregation model.The load model consists of two subsystems: functional model and electrical model.Among them,because of according to their different characteristics,function model is divided into no memory function model,strong drive function model and the weak driving function model.This paper expounds the electric model under different types of running state,especially the weak driving function model and aggregation model,for the subsequent chapters look for random deviation of load control of load tracking and the relationship between the control instruction information transmission error of lay the foundation.Then,frequency optimization model was established based on thermal dynamic load model,and design the temperature control load control strategy based on particle swarm optimization algorithm,the simulation is obtained the figure under different packet loss of AGC signal tracking effect and the tracking error.Then process the data and the tracking error for data fitting by Easy Fit.And quadratic fitting is carried out between the variance and expectation of different packet loss rates and packet loss.Finally,the relation between the random deviation of load tracking and the transmission error of control instruction information is found.Finally,this paper formulate an information transmission error analyt ical model of the impact of load tracking performance,and consider the comfortable degree of satisfaction of the user.We use the cooperative relay technology to reduce the packet loss and improve the transmission performance of cooperative relay networks.Then this paper construct the load control and relay transmission collaborative optimization problem.This non-convex optimization problem can be solved by using the algorithm of bacterial chemotaxis,and then obtain the user optimal load running state and bandwidth allocation and pricing strategy.