Frequency Domain Methods for Accuracy Assessment of Wideband Models in Electromagnetic Transient Stability Studies

Abstract

Modern power systems face several problems at frequencies above the range of traditional stability studies due to the increasing penetration of power electronic devices. This phenomenon has been recently referred to as electromagnetic transient stability and is a growing issue in systems with power electronic converters at any power and voltage level, such as FACTS, HVDC, interfaces for grid connection of renewable energies, custom power devices for power quality enhancement, among others. The study of power systems stability is usually carried out by simulation tools that represent the power system through phasor models. However, due to the faster dynamics of modern systems, the harmonic interaction among the controllers, the converters, and the electric power components, recent research results suggest that some stability analysis should be conducted with models suitable for wider frequency ranges, e.g., electromagnetic transient models. This paper reviews the use of frequency domain methods to analyze the influence of the modeling approach of passive power components on the results of electromagnetic transient stability studies.

Wave Function and Multiscale Modeling of MMC-HVdc System for Wide-Frequency Transient Simulation

“…1(a) where only single-frequency carrier is present. If the high-frequency harmonics or electromagnetic transient stability [9] is concerned, then the time-step size of microseconds is required for the simulation.…”

“…The well-known quasi-steadystate models [5]- [8] for electromechanical transient studies do not track PE fast-changing snapshots, inherently limited for a usage in modeling MMC-HVDC systems. This is because, as affected by high-frequency PE switching events, power system-level dynamic studies such as stability analysis are currently extended to a broader range of frequencies to the electromagnetic transients [9], i.e. to cover multiple time-scale transients with a wide frequency range.…”

Review on Solid-State Transfer Switch Configurations and Control Methods: Applications, Operations, Issues, and Future Directions

“…The control system properly determines the time when alternative SCRs are deblocked. [133][134][135]. A simple method is employed to accomplish this: Stage one: The selective source supplies feeder during the SSTS at full conduction.…”

Electromagnetic Oscillation Origin Location in Multiple-Inverter-Based Power Systems Using Components Impedance Frequency Responses

“…Voltage source grid-connected inverters (GCIs), as efficient power electronic interfaces, are widely used to transmit the generated electricity into the utility grid [2]. However, impedance interactions between various control loops of the GCIs (e.g., outer power control loop, dc-link voltage control loop, inner current control loop, and phaselocked loop (PLL)) and passive components (e.g., transmission lines (TLs), underground cables, and transformers) may cause electromagnetic oscillation phenomena in various frequency ranges [3]- [6]. Though oscillation mechanisms of single-GCI-based power plants have been thoroughly explored in [4], [7]- [11], the oscillation mechanism and oscillation origin location of multiple-GCI-based power plants need to be further investigated.…”