Voltage Regulation Strategy of Distribution Network with Decentralized Wind Power Based on Cluster Partition

Abstract

Background: With the access to large-scale distributed energy, the voltage off-limit problem of the distribution network has become more and more serious, and the traditional centralized voltage control method has been difficult to meet the demand of distribution network control and market development. Methods: In this paper, a voltage regulation strategy based on decentralized wind power clustering is proposed. Considering the active and reactive power regulation ability of decentralized wind power, based on the cluster division of distributed energy, the goal is to minimize power regulation and voltage fluctuation within the cluster. Combining the K-means clustering algorithm and optimized PSO algorithm for voltage regulation within the cluster ensures that the voltagecrossing problem is solved. After the voltage regulation of all clusters, the auxiliary service transaction of voltage regulation is implemented to complete the voltage regulation of the whole network. Results: Taking ieee33 bus system as an example, the MATLAB simulation shows that the decentralized wind power access triggered voltage overrun. Using the proposed cluster division method to cluster the model, the clustered voltage regulation of the nodes with voltage overrun or reaching the limit resulted in greater voltage down-regulation than the overall voltage regulation. Conclusion: The proposed voltage regulation strategy has better advantages. It is verified that the proposed voltage regulation strategy not only solves the voltage overrun problem, but also reduces voltage fluctuations and the amount of power regulation used for voltage regulation, increasing the utilization of distributed energy with better superiority.