WAMS-Based Voltage Stability Indicator Considering Real Time Operation

Abstract

In this work, a WAMS-Based Voltage Stability Indicator considering real time operation conditions is proposed. The indicator considers operational limits, such as reactive power reserves, transmission constraints, generating capacity, and voltage limits. The proposed indicator is based on a combination of the reactive margin and the actual demand at each busbar of the system. The reactive margins are obtained from an optimization problem. Applications on a test system show that the indicator is able to identify the proximity to voltage collapse, successfully. It also provides a reliable measure to assess the system security of real time operation in power grids.

Optimización Multi-objetivo de Potencia Activa y Reactiva para crear la Curva PQ en las Barras del SEP

“…Para relacionar la potencia activa y reactiva en una única expresión matemática, que contemple todos los parámetros y variables de las ecuaciones de flujo de potencia que intervienen en el fenómeno de colapso de tensión, se usa la formulación del artículo [24] y aplicada en [21] en un problema de optimización de una sola función objetivo. Considérese el sistema de la Figura 4, y su equivalente π mostrado en Figura 5.…”

“…Para probar el modelo de optimización multiobjetivo, se modela el sistema de cinco barras que es utilizado en [21], del cual, se muestra los datos y detalles del sistema eléctrico en la Figura 6. El sistema dispone de 2 barras de carga, 2 barras con control de tensión (barras PV) y una barra intermedia.…”

“…Por otra parte, la evaluación de estabilidad de voltaje, usando la curva PV, en la punta de la curva de la nariz (punto del colapso) pueden llevar a determinar márgenes de potencia elevados, ya este es el punto de máxima transferencia de potencia y los niveles de voltaje llegan a valores muy inferiores a los límites operacionales reales de los sistemas de potencia [21]. Adicional, las curvas PV y QV analizan los márgenes de potencia considerando únicamente la capacidad de la red, sin considerar las reservas y límites del recurso de generadores.…”

On-line voltage stability monitoring and control in smart grid — A survey

“…The methodology proposed in [50] has not concentrated on finding a pattern recognition tool that enables system operators to identify the appropriate multi linear regression model to be used at each instant in the online environment [51]. D. Arias et al [52] proposed Wide Area Measurement System (WAMS) based voltage stability indicator that considers operating limits like reactive power reserve, voltage limits. This indicator is based on a combination of reactive margin and actual demand at each bus of the system.…”

Alternative Under Frecuency Load Disconection Methodology Based on Semi-Adaptative Model

“…The analysis of which elements affect directly the loss of stability, both in frequency and voltage, implies that in the generation, transmission and distribution stages alternative processes are generated to restore the normal operating ranges of the power system; however, there is a risk that the system will exceed the stability limits and the generation will be insufficient to compensate for the different electrical parameters, causing a general blackout of the system. One of the solutions proposed is the increase of generation plants based on non-conventional renewable energies; but with this option, uncertainty conditions have been introduced to the power grid due to the random nature of the methodological variables (Arias, Vargas & Rahmann., 2015;Carrión, González, Isaac & López, 2017;Guerrón, García & Montero, 2014;Mazaher & Hazlie, 2014;Schmitz & Smith, 2009;Short, Infield & Freris, 2007).…”