Dynamic voltage regulation control method of distributed photovoltaic cluster based on distributed communication

Abstract

The invention provides a distributed photovoltaic-cluster dynamic voltage regulation control method based on distributed communication and belongs to the electric power system operation and control technology field. The method comprises the following steps of establishing a distributed photovoltaic cluster voltage optimization model and a branch trend equation of a distributed photovoltaic cluster respectively, and carrying out linearization on the branch trend equation so as to obtain the branch trend equation of distributed photovoltaic cluster linearization, and converting to a matrix branch trend equation; after solving a matrix equation, converting the optimization model so as to acquire a converted optimization model; using a distributed quasi-Newton method to solve the converted optimization model; based on an iterative result, carrying out reactive power control on each node in the distributed photovoltaic cluster and determining whether iteration converges; and if the iteration converges, ending voltage control of the distributed photovoltaic cluster. By using the method, a reactive power regulation capability of distributed photovoltaic power generating nodes is fully used, construction of a communication system is avoided, a calculating burden of the system is mitigated and operation and maintenance cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of power system operation and control, and in particular relates to a distributed communication-based distributed photovoltaic cluster dynamic voltage regulation control method. Background technique [0002] With the increasing attention to environmental pollution and the comprehensive advancement of smart grid construction, the installed capacity of renewable energy power generation and grid-connected power generation continue to increase, and the time-varying and complex problems of grid operation have become increasingly prominent, greatly increasing the power grid operating risks and control difficulties. In recent years, the state has issued a series of policy documents to vigorously support the promotion and application of distributed resources, and the State Grid Corporation of China has also issued "Opinions on Doing a Good Job of Grid-connected Services for Distributed Power". Distributed power gen...

AI Technical Summary

Problems solved by technology

On the one hand, if the centralized controller of the photovoltaic power generation system fails, the voltage regulation of the entire system will not work, so the reliability is very low

On the other hand, due to the large amount of transmitted information, resulting in a long communication delay, the maintenance and optimization calculation of the centralized model will also consume a lot of time, and the control speed is difficult to meet the requirements.

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