Improved plug–play SV with virtual inertia for enhancing the stability of high RES‐penetrated grids. Issue 4 (14th August 2019)

• Record Type: Journal Article
• Authors: Elshenawy, Mahmoud Awad; Abdelkader, Sobhy Mohamed; Amin, Abdelrahman Ahmed; Farghal, Soliman Ahmed
• Is Part Of: IET smart grid. Volume 2:Issue 4(2019)
• Page Start: 571
• Page End: 580
• Publication Date: 2019-08-14
• Subjects: invertors -- reactive power control -- reactive power -- distributed power generation -- synchronisation -- power grids -- synchronous generators -- voltage control -- power system stability -- phase locked loops -- power generation control; self‐synchronisation -- plug–play operation -- dedicated PLL -- PSV -- smoother grid connection -- improved plug–play SV -- virtual inertia -- high RES‐penetrated grids -- synchronisation process -- complicated controller -- plug–play capability -- simpler controller -- actual controller current -- system frequency -- multiple simulation studies -- grid‐friendly inverters -- synchronous generators -- SG; B8110C Power system control -- B8310D Synchronous machines -- C3110B Voltage control -- C3110E Power and energy control -- C3340H Control of electric power systems -- B8120K Distributed power generation -- B8360N DC‐AC power convertors (invertors); Smart power grids -- Periodicals; Computer science -- Periodicals; Energy industries -- Periodicals; Broadcasting -- Periodicals; 333.79110285
• DOI: 10.1049/iet-stg.2018.0214
• Languages: English
• ISSNs: 2515-2947

Abstract

Abstract : The synchronverter (SV) is currently one of the most promising grid‐friendly inverters that mimic synchronous generators (SGs). Almost all the available SV use virtual current signal for synchronization, which require a complicated controller that lacks plug–play capability. This paper proposes a new generation of self‐synchronised SV with a simpler controller, which provides plug–play capability with no need for switching between actual controller current and a virtual current for each ON–OFF process. The proposed SV (PSV) can also share the load with other SGs and SVs and also it is able to take part in regulating system frequency and voltage. A linearised small‐signal model is derived for the controller to investigate its stability. The PSV is also validated through multiple simulation studies carried out in MATLAB/Simulink environment. The results show the capability of the PSV to achieve self‐synchronisation and plug–play operation without a dedicated PLL or a virtual current. Compared to the current self‐synchronised SV, the PSV guarantees a smoother grid connection and gives more accurate reactive power sharing. Moreover, the PSV is applied to a modified IEEE 14‐bus test system considering three different contingencies to prove its impact on enhancing system dynamics and stability.