Work

Modeling and application of DQ-sequence dynamic phasors under unbalanced AC conditions

Year: 2025

Type: article

Abstract: Increasing unbalanced AC operating conditions generates the need of developing models for power electronic equipment in such situations. The dq -sequence dynamic phasor method is proposed in this paper to model power electronic devices controlled in dq -rotating coordinates. Firstly, the instantaneous symmetric component decomposition and Park transformation are sequentially performed on a set of three-phase time-domain signals to define the dq -sequence dynamic phasors. Then, the multiplication property is derived. Next, the general steps for forming the state equations are provided, and the specific expressions of the state matrices are derived. Furthermore, a method is provided for quickly separating the real and imaginary parts of the complex-form state equations, as well as obtaining their simplest real-form. Case study on a two-terminal Modular Multilevel Converter − High Voltage Direct Current system verifies the effectiveness of the proposed modeling method. And the developed state space model is compared with existing similar models to show its advantages.

Source: International Journal of Electrical Power & Energy Systems

DOI: 10.1016/j.ijepes.2025.110524

Authors: Xiaoming Mao, Hongbo Luo, Wenda Zhong, Liang Wu, Zhiyong Yuan

Institutions: Guangdong University of Technology, China Southern Power Grid (China)

Language: English

Topic: HVDC Systems and Fault Protection

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: gold

Estimated APC paid: $3,920