A Coordinated Control Method for Multiple Photovoltaic Generator Groups Based on Event Triggering Mechanism

Abstract

The invention belongs to the field of control of an electric power system, provides a multi-photovoltaic generator group coordination control method based on an event trigger mechanism, and is applied to a multi-photovoltaic generator group system with a connection communication topology, described by a decoupling d-q control model. Each photovoltaic generator, by use of information of itself and information of other photovoltaic generators capable of performing information interaction therewith in a group, constructing a corresponding event trigger mechanism and a distributed coordination control strategy based on the mechanism, such that the active power output rates and the reactive power output rates of all the photovoltaic generators in the group respectively tend to be consistent, and at the same time, the voltages of hub nodes of the electric power system and the active power trends on a power transmission line respectively reach preset values. The method has the following advantages: on the basis that it is ensured that a control task is effectively finished, the information among the photovoltaic generators is sent according to needs, the network communication pressure is reduced, and the operation stability and safety of the electric power system are guaranteed.

Description

Technical field: [0001] The invention relates to a multi-photovoltaic generator group coordination control method based on an event trigger mechanism, belonging to the field of power system control. Background technique: [0002] Since the beginning of the 21st century, the world is facing the problem of energy shortage, and the ability to supply economical and reliable high-quality fossil fuels is gradually declining. Therefore, the use of renewable energy has attracted increasing attention. Solar energy is an important part of renewable energy that can be used by human beings. Compared with traditional energy, solar energy has many advantages such as low pollution, renewable and wide distribution, and will play a very important role in the development of new energy. Because of this, more and more photovoltaic generators will be integrated into the power system in the future. However, under the traditional power system control strategy, the grid connection of a large numbe...

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Problems solved by technology

[0005] In view of this, the purpose of the present invention is to solve the problem of excessive network communication pressure in the current multi-photovoltaic generator group distributed coordinated control method, and provides a multi-photovoltaic generator group distributed coordinated control method based on an event trigger mechanism, which is suitable for The multi-photovoltaic generator group system with connected communication topology composed of photovoltaic generators described by the decoupled d-q control model makes the active power output rate and reactive power output rate of all photovoltaic generators in the group tend to be consistent, and at the same time Make the voltage of the hub node of the power system and the active power flow on the transmission line reach the preset values ​​respectively, and on the basis of ensuring the effective completion of the above control tasks, realize the on-demand transmission of information between photovoltaic generators and reduce the pressure on network communication, thereby Guarantee the stability and safety of power system operation

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