A distributed power grid frequency synchronization and active power distribution control method

Abstract

The invention belongs to the field of grid carrier technology, discloses a distributed grid frequency synchronization and active power distribution control method, and provides a sufficient condition for realizing distributed grid frequency synchronization and active power distribution. The distributed power grid is composed of power generation nodes and load nodes, and the power generation nodes include controllable thermal power generation nodes and uncontrollable wind power generation nodes. The controller only needs a certain controllable node to exchange power information with its neighbor nodes, and it is a distributed controller. The invention only controls the controllable power generation nodes, so that the frequency of all nodes is synchronized to 50Hz, and the output ratio of the controllable generator sets is the same, that is, the ratio of the active power of the nodes to their rated power is consistent. The invention lays a theoretical foundation for the synchronous application of the distributed energy network, expands its application range, restores the rated frequency, avoids the problem of too large or too small output of a certain generating set, and realizes the fair distribution of generating set power.

Description

technical field [0001] The invention belongs to the field of grid carrier technology, and in particular relates to a distributed grid frequency synchronization and active power distribution control method. Background technique [0002] At present, the existing technology commonly used in the industry is as follows: In 1975, Japanese scholar Kuramoto proposed for the first time that in a complex coupling system containing a finite number of identical oscillators, no matter how weak the coupling strength between the oscillators is, the dynamic equation of the oscillator is always can be represented by a simple phase equation, which was later called the Kuramoto model. The idea of ​​applying the Kuramoto model to the power grid came after the construction of the smart grid was first proposed in the United States. In fact, some scholars have studied the relationship between the network contraction power system model and the Kuramoto model before. With the continuous interconne...

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Problems solved by technology

To sum up, the problems existing in the existing technology are: due to the volatility and randomness of new energy sources (wind energy, solar energy), the existing control methods cannot completely solve the existing practical problems, and the complexity of the Kuramoto model itself , the model is more complex, the theoretical analysis of system stability is more difficult, and the practical application lacks theoretical support

[0004] (1) The complexity of the Kuramoto model itself, the model is more complex, the theoretical analysis of system stability is more difficult, and the practical application lacks theoretical support; the system stability cannot be strictly analyzed

[0005] (2) The use of centralized processing will further increase control and communication costs, reduce power generation efficiency, and waste data storage resources

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