Electromechanical wave in power systems: theory and applications

Abstract

The continuum model is a key paradigm describing the behavior of electromechanical transients in power systems. In the past two decades, much research work has been done on applying the continuum model to analyze the electromechanical wave in power systems. In this work, the uniform and non-uniform continuum models are first briefly described, and some explanations borrowing concepts and tools from other fields are given. Then, the existing approaches of investigating the resulting wave equations are summarized. An application named the zero reflection controller based on the idea of the wave equations is next presented.

Nonlinear transient waves in coupled phase oscillators with inertia

“…Moreover, equations of the type Eq. ( 3) have been used to describe the propagation of electromechanical waves in large electric power systems 38,39 .…”

Optimising power system frequency stability using virtual inertia from inverter‐based renewable energy generation

“…Thus, analysing the network as a whole with its spatial properties. In the literature [10,14,34,[39][40][41][42], various approaches and assumptions are made to model the power system network's frequency transient response. A single synchronous machine generator's rotor dynamics is modelled with the swing equation [10].…”

“…For very large and dense networks, the authors of [40][41][42]] approached the power system as a continuum. The continuum model assumes the network and its element parameters, such as the generators, transmission lines, and loads to be continuous/ continuum, i.e.…”

Low-frequency oscillations in coupled phase oscillators with inertia

“…On the other hand, in electric power engineering, the dynamics of the grid under substantial oscillatory disturbances (desynchronized states that may have catastrophic consequences such as blackouts) has been investigated from two perspectives. The first considers the propagation of disturbances in the grid in the form of low frequency (order of 0.1-1 Hz) electromechanical waves 43,44 . A continuum model was constructed to describe the traveling wave along transmission lines 43 , based on which a control method was proposed to damp the dynamics 45 .…”