Sensitivity Analysis and Small-Signal Stability of Grid Following Converters

Sepúlveda García, Simón; Garcés, Alejandro

Sensitivity Analysis and Small-Signal Stability of Grid Following Converters

dc.creator	Sepúlveda García, Simón
dc.creator	Garcés, Alejandro
dc.date	2022-07-01
dc.date.accessioned	2025-10-01T23:52:49Z
dc.description	This article presents a small-signal study, based on a sensitivity analysis, of a voltage source converter (VSC) operating as a grid-following device. This type of operation is standard for integrating distributed energy resources directly into a primary grid without considering the control over specific variables (e.g., voltage and frequency), thus maximizing the amount of injected active power. The present study adopted the classical vector-oriented control based on the linearization method of the averaged model; hence, this analysis is limited to linear controls. The main objective of this study is to evaluate how each controller parameter influences the system’s stability. To conduct the sensitivity analysis, an averaged model in the dq reference frame of the VSC was employed to describe the system dynamics in the equivalent state-space model. Afterward, the stability was analyzed through a sensitivity analysis of the eigenvalues of the corresponding state matrix. The numerical results demonstrate that the main problems for the stability of VSCs operating as grid-following converters are threefold: a high value of the filter inductance, a non-ideal impedance that appears depending on the connection point, and poor coordination of the parameters of the Kp controllers. These results are compared to a simple bifurcation analysis of the state matrix, which consists of a diagram that describes the variation in eigenvalues when a parameter changes, thus proving their validity.	en-US
dc.description	El presente artículo presenta un estudio de pequeña señal, basado en el análisis de sensibilidad, del convertidor Voltage Source Converter (VSC) operando como dispositivo de seguimiento de red. Este tipo de operación es común para la integración de recursos energéticos distribuidos directamente a la red primaria sin considerar el control sobre variables específicas como la tensión o la frecuencia, maximizando así la cantidad de potencia activa inyectada. El presente estudio adopta el clásico Control Vectorial Orientado basado en la linealización del modelo promediado, por tanto, este análisis es limitado a controles lineales. El objetivo principal de esta investigación consistió en evaluar cómo influye cada parámetro del controlador en la estabilidad del sistema. Con el fin de realizar el análisis de sensibilidad, se empleó un modelo medio en el marco de referencia dq del VSC para describir la dinámica del sistema en el espacio de estados equivalentes; posteriormente, se buscó la estabilidad mediante un análisis de sensibilidad de los valores propios de la matriz de estado correspondiente, cuyos resultados numéricos demostraron que los principales problemas para la estabilidad de los VSC que operan como convertidores de seguimiento son tres: un valor elevado de la inductancia del filtro, la presencia de una impedancia no ideal que aparece en función del punto de conexión, y una mala coordinación de los parámetros de los controladores Kp. Estos resultados se han comparado con un simple análisis de bifurcación de la matriz de estado, que consiste en un gráfico que describe el movimiento de los valores propios cuando cambia un parámetro, corroborando así su validez.	es-ES
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dc.identifier	https://revistas.itm.edu.co/index.php/tecnologicas/article/view/2383
dc.identifier	10.22430/22565337.2383
dc.identifier.uri	https://hdl.handle.net/20.500.12622/7836
dc.language	eng
dc.publisher	Instituto Tecnológico Metropolitano (ITM)	es-ES
dc.relation	https://revistas.itm.edu.co/index.php/tecnologicas/article/view/2383/2458
dc.relation	https://revistas.itm.edu.co/index.php/tecnologicas/article/view/2383/2461
dc.relation	https://revistas.itm.edu.co/index.php/tecnologicas/article/view/2383/2462
dc.relation	https://revistas.itm.edu.co/index.php/tecnologicas/article/view/2383/2465
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dc.rights	Derechos de autor 2022 TecnoLógicas	es-ES
dc.rights	http://creativecommons.org/licenses/by-nc-sa/4.0	es-ES
dc.source	TecnoLógicas; Vol. 25 No. 54 (2022); e2383	en-US
dc.source	TecnoLógicas; Vol. 25 Núm. 54 (2022); e2383	es-ES
dc.source	2256-5337
dc.source	0123-7799
dc.subject	Grid-following converters	en-US
dc.subject	Hopf bifurcation	en-US
dc.subject	sensitivity analysis	en-US
dc.subject	vector-oriented control	en-US
dc.subject	voltage source converter	en-US
dc.subject	Convertidores seguidores de red	es-ES
dc.subject	Bifurcación tipo Hopf	es-ES
dc.subject	Análisis de sensibilidad	es-ES
dc.subject	Control vectorial orientado	es-ES
dc.subject	Convertidor de fuente de tensión	es-ES
dc.title	Sensitivity Analysis and Small-Signal Stability of Grid Following Converters	en-US
dc.title	Análisis de sensibilidad y estabilidad de pequeña señal en convertidores seguidores de red	es-ES
dc.type	info:eu-repo/semantics/article
dc.type	info:eu-repo/semantics/publishedVersion
dc.type	Research Papers	en-US
dc.type	Artículos de investigación	es-ES