On the Emulation of Synchronous Machine Dynamics by Converter-Interfaced Generators

TL;DR

This paper explores the criteria for converter-interfaced generators to emulate synchronous machine dynamics, analyzing energy, response time, damping, and short-circuit behavior through simulations.

Contribution

It establishes specific conditions for devices to replicate synchronous machine behavior and demonstrates their application via numerical and simulation examples.

Findings

Devices can emulate SM dynamics if they meet energy and damping criteria.

Simulation results validate the proposed conditions.

The approach aids in designing converter-interfaced generators for grid stability.

Abstract

This paper discusses the conditions that a device needs to satisfy to replicate the behavior of a conventional synchronous machine (SM) connected to a power network. The conditions pertain to the device's stored energy, time scale of response, oscillation damping, and behavior during short-circuits. Relevant remarks for devices that do/don't satisfy these conditions are discussed through an illustrative numerical example as well as through simulation results based on a modified version of the well-known WSCC 9-bus test system.