A Distribution Network Reconfiguration Method Considering Electric Vehicles' Participation in Frequency Regulation

Abstract

The invention discloses a distribution network reconstruction method that takes into account the participation of electric vehicles in frequency regulation. The method is based on the load prediction of electric vehicles, takes the minimum distribution line network loss and voltage offset as the optimization goal, and takes the distribution line as the optimization goal. There is no heavy load on the network line and the limit frequency regulation power that the electric vehicle can provide at the current node is the optimal condition. For the method of optimizing the reconfiguration of the distribution network when the electric vehicle participates in the frequency regulation of the power system, the optimization of the distribution network is important. The structure will further reduce the active power loss of the distribution network and improve the frequency quality and voltage quality of the distribution network. The method solves the problem that the algorithm is difficult to converge due to the increase of the solution space dimension when the distribution network structure is complex, and the electric vehicle load is involved in the frequency regulation process combined with the distribution network reconstruction.

Description

technical field [0001] The invention relates to a method for optimizing and reconfiguring a distribution network in load-side frequency regulation, in particular to a method for reconfiguring a distribution network that takes into account the participation of electric vehicles in frequency regulation. Background technique [0002] Since the 1970s, there has not been much change in terms of the goal of distribution network reconstruction. It is still focused on reducing the active power loss of the distribution network under various circumstances and balancing the distribution network. Load distribution to achieve the purpose of improving the voltage quality of the distribution network. [0003] As far as the switches in the distribution network system are concerned, they can be roughly divided into two categories, one of which is more segmented switches, and the other is a small number of tie switches. At the beginning of the design, the distribution network can form a clos...

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Problems solved by technology

[0004] Since the essential reason for the occurrence of frequency events in the power system is that the active power output does not match the active power demand of the load, when a frequency event occurs, the power system may have problems such as low voltage of some nodes and overload or overload of some lines

When the electric vehicle load participates in the secondary frequency regulation, whether it is reducing the charging power or providing active power to the grid, it will have an impact on the power flow of the distribution network. Therefore, when the frequency regulation capacity that the electric vehicle load can provide is greater than the capacity required by the system When choosing which electric vehicles are located in the nodes of the distribution network and how much frequency modulation output these electric vehicles should provide, it will have an impact on the optimal operating structure of the distribution network

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