Effect of accurate modelling of converter interfaced generation on a practical bulk power system. Issue 15 (3rd June 2020)

• Record Type: Journal Article
• Authors: Huang, Qiuhua; Ramasubramanian, Deepak; Vittal, Vijay; Keel, Brian; Silva, Jose
• Is Part Of: IET generation, transmission & distribution. Volume 14:Issue 15(2020)
• Page Start: 3108
• Page End: 3116
• Publication Date: 2020-06-03
• Subjects: power system transient stability -- power grids -- power system simulation -- photovoltaic power systems -- power convertors -- power generation faults -- power generation reliability; PV plant model -- positive‐sequence models -- EMT‐TS hybrid simulation -- EMT models -- single‐line‐to‐ground faults -- positive‐sequence based model -- bulk power system -- converter interfaced generation -- aggregated rooftop sources -- dynamic analysis -- positive‐sequence performance‐based model -- electromagnetic transient model -- utility‐scale photovoltaic plants -- dynamic simulations -- positive‐sequence transient stability -- TS simulation approach -- prolonged‐tripping -- unbalanced faults -- PV plant proximity; Electric power production -- Periodicals; Electric power transmission -- Periodicals; Electric power distribution -- Periodicals; 621.3105
• DOI: 10.1049/iet-gtd.2019.1290
• Languages: English
• ISSNs: 1751-8687

Abstract

Abstract : With increased penetration of converter interfaced generation (CIG) in power systems, the suitability of modelling approaches and models dependent on the system conditions has to be studied. However, their suitability has yet to be systematically analysed. In this study, the authors first develop a methodology for identifying the maximum penetration of aggregated rooftop sources that can be represented as negative loads in both the steady state and dynamic analysis. Then they verify the suitability of a positive‐sequence performance‐based model and a detailed electromagnetic transient (EMT) model for utility‐scale photovoltaic (PV) plants under different fault conditions. Based on the results, they perform dynamic simulations on a large practical system with both positive‐sequence transient stability (TS) and EMT‐TS hybrid simulation. This study shows that positive‐sequence performance based PV plant model is more suitable for study cases with faults relatively far away from the point of connection. In addition, the results indicate that positive‐sequence models and TS simulation approach can produce comparable results with reference to the EMT‐TS hybrid simulation with EMT detailed models for normally‐cleared single‐line‐to‐ground faults, but the inadequacy of positive‐sequence based model and simulation approach becomes obvious for prolonged‐tripping of unbalanced faults in the proximity of the PV plants.