Active power distribution network voltage control method and system based on virtual cluster

Abstract

The invention discloses an active power distribution network voltage control method and system based on a virtual cluster, and belongs to the field of distributed power supply control. Distributed power supplies in an area are integrated and controlled, so that the control quantity can be remarkably reduced, and the "dimension disaster" brought for a centralized controller due to the fact that thedistributed power supplies are connected to a power distribution network in a high-permeability mode can be effectively avoided. A distributed power supply master station control center, a distributed power supply cluster and a distributed power supply station are used for carrying out layered optimization control on active and reactive outputs of the distributed power supplies connected to the power distribution network in a dispersed mode; the master station control center generates a cluster control instruction; and a cluster management and control device receives the cluster control instruction and distributes the cluster control instruction to the distributed power supply station, so that safe and economic operation of the power distribution network is achieved. Meanwhile, in view ofthe randomness and volatility of the outputs of the distributed power supplies, autonomous control is carried out by the distributed power supply station, and a method of PI control with dynamic optimization is adopted, so that the safety and stability of a master station cluster control interval station are guaranteed.

Description

technical field [0001] The invention belongs to the field of distributed power source control, and in particular relates to a virtual cluster-based active distribution network voltage control method and system, which provides a basis for large-scale access of distributed power sources to the distribution network for regulation and control. Background technique [0002] Aiming at the impact of distributed power generation on the distribution network after a large number of connections, the current solutions are mainly micro-grid technology, virtual power plant technology (VPP) and distributed power generation cluster control technology. Distributed power cluster control is mainly used in large-scale wind farm control, and has not been successfully expanded to the field of power grids containing other types of distributed power such as distributed photovoltaics and gas turbines. Each wind farm is relatively centralized in terms of distance, and multiple wind farms are connecte...

AI Technical Summary

Problems solved by technology

[0003] Purpose of the invention: In order to solve the problems of large number of control targets and complex characteristics when distributed power sources are highly penetrated into the distribution network, the purpose of the invention is to provide a virtual cluster-based active distribution network voltage control method and system, Cluster control of distributed power with similar characteristics to ensure safe, stable and economical operation of distributed power with high penetration into the distribution network

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