Analysis of electromagnetic radiation of VSC-HVDC converter station based on dipole theory

Hertzian dipole model and magnetic dipole model based on dipole theory are built for analyzing electromagnetic radiation of VSC-HVDC converter stations in this paper. Transient characteristics of converter valves while switching are analyzed with IGBT1 model. Current through equipment other than valve in converter stations can be extracted by system simulation. Factors that affect electromagnetic radiation of VSC-HVDC converter stations are obtained by varying these parameters of the magnetic dipole models. Transient voltagepsilas frequencies of valve and their corresponding voltage amplitudes tend to have obvious effects on electromagnetic radiation of valves according to calculation, and the compact extend of equipment inside the station would also affect electromagnetic radiation directly. Electromagnetic radiation from VSC-HVDC converter station can be restrained effectively by retrenching devices and decreasing harmonic, especially harmonic current at high frequencies.