Voltage stability analysis of grid-connected wind farms with FACTS: Static and dynamic analysis

Abstract

Recently, analysis of some major blackouts and failures of power system shows that voltage instability problem has been one of the main reasons of these disturbances and network collapses. In this article, a systematic approach to voltage stability analysis using various techniques for the IEEE 14-bus case study is presented. Static analysis is used to analyze the voltage stability of the system under study, while the dynamic analysis is used to evaluate the performance of compensators. The static techniques used are power flow, V-P curve analysis, and Q-V modal analysis. In this study, Flexible Alternating Current Transmission system (FACTS) devices-namely, static synchronous compensators (STATCOMs) and static var compensators (SVCs)-are used as reactive power compensators, taking into account maintaining the violated voltage magnitudes of the weak buses within the acceptable limits defined in ANSI C84.1. Simulation results validate that both the STATCOMs and the SVCs can be effectively used to enhance the static voltage stability and increasing network loadability margin. Additionally, based on the dynamic analysis results, it has been shown that STATCOMs have superior performance, in dynamic voltage stability enhancement, compared to SVCs.

Application and control of flexible alternating current transmission system devices for voltage stability enhancement of renewable-integrated power grid: A comprehensive review

“…The simulation results also showed that STATCOM provides better performance than SVC. In [36], static and dynamic voltage stability analyses of grid-tied wind farms incorporating FACTS devices were carried out. The static analysis was done using static techniques such as power flow, PV curve analysis, and QV modal analysis to examine the voltage stability of IEEE 14-bus test system while the dynamic analysis was performed to evaluate the performance of SVC and STATCOM during both normal and contingency conditions.…”

“…Since Wind Energy Conversion Systems constitute the largest variable renewable energy sources with large scale integration, several studies have been carried out to investigate voltage stability of power grids with high penetration of wind energy systems [ 1 , 9 , 23 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 ]. Three of the most-commonly investigated WECS are the Permanent Magnet Synchronous Generator (PMSG) based WECS, Doubly-Fed Induction Generator (DFIG) and Squirrel-Cage Induction Generator (SCIG).…”

Optimum Location of Spvg to Enhance Voltage Stability Using Static Techniques

“…Voltage is fully associated with reactive powerby assuming real power at every operating point is constant. Then the stability of the voltage can be calculated via the incremental relation between reactive power and voltage (Heetun, Abdel Aleem, & Zobaa, 2016). The reduced Jacobian matrix is given as:…”

Impact of grid‐tied large‐scale photovoltaic system on dynamic voltage stability of electric power grids

“… The steady state equilibrium values ( x 0 y 0) of small disturbance in the dynamic system can be evaluated by setting the derivative in (1) to zero. Equations (1) and (2) are expressed as shown in (3) and (4) [34]. Further, by eliminating Δ y , the linearised state equation can be written as shown in (5) and (6).…”