Research on Unequal Grouping of Parallel Compensation Capacity in Substation

Abstract:

For the problem of unequal grouping of parallel compensation capacity in substation, this paper proposes a new optimization method based on curve segmentation and clustering. Firstly, calculate reactive power demand curve by transformer parameters and load curve, partition this curve into several segments. Then cluster these segmentation results into K clusters by using modified FCM (fuzzy C-means clustering) algorithm, in which K means the number of capacitor groups. Take the difference between two adjacent cluster centers as the capacity of each group. Furthermore, study the relationship between segment number and grouping centers in order to get the steady grouping results. After the grouping plan is determined, take the nine-area figure as control strategy. Finally, simulating with an equivalent practical power grid and load profile, the results show both the availability and rationality of this method that power loss is less and power factor is higher compared with the equal grouping method when capacitor is divided into 3 groups.

• Periodical: Applied Mechanics and Materials (Volumes 556-562)
• Pages: 1636-1642
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.556-562.1636
• Online since: May 2014
• Authors: Shan Cao*, Yu Qi Ji, Guang Fei Geng
• Keywords: Compensation Capacity Grouping, Fast Curve Partitioning, FCM, Reactive Power Planning

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