Multi-terminal flexible interconnection power distribution network planning method and system

Abstract

The invention discloses a multi-terminal flexible interconnected power distribution network planning method and system, and the method comprises the steps: considering the interaction among a source,a network, a load and a storage, coordinating the respective benefit demands of a distributed power supply operator, a power grid company and a power user, combining the system planning with the operation optimization, and proposing a source-network-load-storage three-layer coordinated planning model for a multi-terminal flexible interconnected power distribution network, processing the uncertainty problem of the distributed power supply and the load by using a scene analysis method, and solving the model by using a hybrid algorithm formed based on a simulated annealing algorithm and an interior point method. According to the invention, benefit requirements of different subjects are considered, friendly interaction of a source, a network, a load and storage is promoted, respective benefitsof a DG operator and a power user are guaranteed, the operation level of the system can be improved, and the power supply quality and economy of system operation are improved.

Description

technical field [0001] The invention belongs to the technical field of active distribution network planning, and in particular relates to a multi-terminal flexible interconnection distribution network planning method and system. Background technique [0002] With the development of back-to-back flexible DC (Back-to-Back VSC-HVDC) technology, it has become an important development trend to use flexible power electronics technology to transform distribution networks. Applying the back-to-back flexible straight technology to the AC distribution network can change the long-term practice of "closed-loop design and open-loop operation" in my country's distribution network. It can not only realize the long-term safe closed-loop operation of any feeder in the distribution network, but also accurately control the power grid Trend distribution. The flexible interconnection operation of distribution network is an important way to improve the reliability of power supply and promote the ...

AI Technical Summary

Problems solved by technology

[0005] At this stage, DG operators fail to fully consider the planning and development of the distribution network when planning, and are limited by the capacity of the power flow section, resulting in serious problems of abandoning wind and light; grid companies do not fully consider the possible planning of DG when investing in construction , which also makes the planning of the distribution network unreasonable, it is difficult to accept a large number of DG into the network, and it is impossible to maximize the benefits; in addition to investing in construction, the power grid company can also implement various demand side response (demand side response, DSR) projects to encourage ESS and FL Waiting for power users to adjust their power consumption behavior will also affect distribution network investment and DG access

Images