English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

This paper presents a novel hybrid transformer (HT) to regulate voltage sags/swells and to provide a unity power factor at the connection point to the medium voltage grid. The HT is a promising instrument for constructing an active distribution grid in the future. To overcome the applied design limitations concerning the converter and control system of the existing HTs, the HT structure and the control design have been proposed based on the indirect matrix converter (IMC) and Lyapunov energy function, respectively. The proposed HT topology consists of a direct power converter and a line frequency transformer. The proposed HT employs an IMC with space vector modulation that is connected to the distribution network via a series transformer. This power electronic converter increases the reliability, controllability and intelligence of the distribution substation. The Lyapunov direct control method is used to design the IMC controller that ensures tracking the input reference current and voltage. A systematic experimental and numerical investigation is performed in order to validate the effectiveness of the proposed topology. The proposed HT can compensate voltage sags/swells (more than 20% of nominal voltage). In addition, it performs properly in power factor correction and reduces the capacitor bank in the station.

Design of a Hybrid Transformer based on an Indirect Matrix Converter for Distribution Networks