Analysis of multi-converter network impedance using MIMO stability criterion for multi-loop systems

• A method of combining MIMO multi-converter network impedances is presented. stability techniques are applied without loss system information. The contribution grid-forming and grid-following converters considered. Tuning recommendations provided for a modern, converter dominated network. tuning current power controllers PLL found to be most pertinent. This work presents novel simplifying systems containing complex analyses. Analysis conducted via the equivalent output impedance. Important points impedance-based analysis larger networks considered, including impedance rotations, proper combination sources correctly obtaining minimum realisation with appropriate tolerances. proposed used conduct sensitivity different control parameters determine modern electricity To achieve this, structures power/voltage control, negative sequence regulation synchronous machine emulation included. Network sensitive active frequency-based components such as PLLs. However, voltage exhibits smaller effect on range short circuit ratios. Some when simplified can utilised how ensure correct application.