Research On Optimal Dispatch Of Source Network Load In Active Distribution Network

The complexity of the dynamic characteristics of large-scale distributed new energy grids and the diversified development of load types make the safety and stability of power systems usher in greater challenges.The active distribution network emphasizes the flexibility and initiative of the system,and combines advanced communication technology and energy management system technology to actively control the source network load in the active distribution network.to reduce the impact of distributed power generation and various power electronics on the grid.The overall situational awareness of the source network load of the active distribution network is conducive to formulating a reasonable and effective control strategy and realizing the optimal regulation of the power flow of the whole network.In this paper,we aim to establish an optimal dispatch model that comprehensively considers the various resources of the source network load within the active distribution network,reduces the dispatching pressure of the distribution network,enhances the consumption capacity of new energy,improves the economy of distribution network operation,and verifies the effectiveness of the model by example.Firstly,the technical architecture of active distribution network is elaborated,and the situational awareness technology of active distribution network is comprehensively analyzed and explained.The application of situational awareness technology on the load side of the source network is discussed separately.Secondly,the quantification of demand response potential is the core issue of demand response technology.Based on the analysis of the dynamic operation characteristics of smart home appliances such as air conditioners and water heaters,an aggregation model of the operation characteristics of smart home appliances is constructed.The time-varying potential of demand response potential will change with the different operating states of smart home appliances is pointed out,and the mathematical model of the demand response potential of smart home appliances and its aggregation model are constructed according to the relationship between demand response and operation state.Comprehensive consideration of the user comfort problem,the demand response optimization scheduling model is established,and the effectiveness of the demand response potential model is simulated.Finally,aiming at the problem of coordinated optimization and dispatch of source network and load,a function model with the lowest total operating cost of the power grid as the target is established,and the constraints of the climbing rate of the generator set,the constraint of the transmission limit of the power grid,the response to load demand and the constraint of user remorse are considered.The IEEE-33 node system is used as a study to verify the feasibility of optimizing the scheduling model.The optimization results of "source network","source charge" and "source network load" are compared with a single control strategy.