| The rapid increase of load and the increasing tense of distribution network resources make the power supply capacity become an important index to evaluate the distribution network.With the rapid development of society and economy,the power supply and power supply quality of the distribution network are getting higher and higher.It is of great significance to exploit the power supply potential of the existing distribution network to the development of power supply of industry and users in China.After summarizing the results of the maximum power supply capability of the distribution network,this paper studies the bottleneck of the distributed power supply and the power supply capability of the distribution network considering the user rating.In addition,the scheduling optimization Distribution network TSC to enhance the issue in-depth analysis,the main contents are as follows:(1)Introduced the concept and classification of distributed power supply,described the mathematical model of wind power generation technology and photovoltaic power generation technology.According to the different types and control strategies of distributed power grid connection,the paper introduces the common distributed power node processing Method and the influence of distributed power access on power flow,voltage and loss of distribution network.The concept and classification of interruptible load are introduced.The concept of interruptible load and the signing of contract are described in detail.At last,the operation mode of interruptible load and the response revenue of users who can sign interruptible load are introduced.Which will lay the foundation for analyzing the power supply capability and establishing the corresponding model.(2)The solution model and solution method of the maximum power supply capacity of the distribution network are described.The power supply bottleneck sequence with limited power supply capacity is obtained by using the variable step size TSC approximation method.The power supply bottleneck sequence is obtained by using the step-length TSC approach to the distributed power distribution network with the maximum load capacity of the distribution network as the goal and the safe operation of the system as constraint.The maximum power supply capacity is obtained by inserting the distributed power supply bottleneck at the bottleneck node.Finally,an example is given to demonstrate the effectiveness of the proposed method.Beside,the influence of user rating on the maximum power supply capacity of the distribution network is analyzed,and the maximum power supply capacity model considering the user rating is established.Considering the different number of IL users' response and IL user response,The level of the maximum power supply capacity of the distribution network after the user is graded.And the TSC approximation method with variable step size is used to(3)solve the maximum power supply capacity taking into account the user classification.Finally,the effectiveness of the model and method is verified by an example.(4)A TSC equalization promotion strategy for multi-period IL user optimal dispatching is proposed,which mainly considers the similarity of the TSC curve and the daily load curve of the distribution network with the interruptible load in one day after dispatching and the improvement of the power supply capacity,So that the load involved in scheduling more able to meet the current actual load demand.A multi-period IL user optimal scheduling model is established for these two objectives.Genetic algorithm is used to solve the model and decision-making based on DM is used.The example proves that the method can effectively manage the utilization of load,Efficient distribution of power resources when the load is interrupted and the capacity of power supply is increased. |
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