Analysis of a new voltage stability pointer for line contingency ranking in a power network

Abstract

Improper management of reactive power in a power network could lead to voltage instability. This paper presents a well-detailed study on voltage instability due to violation of power equilibrium in a power network and introduces a new voltage stability pointer (NVSP). The proposed NVSP is developed from a reduced 2-bus interconnected network to predict the sensistivity of voltage stability to reactive power variation. The simulation results from MATLAB were evaluated on IEEE 14-bus test system. The contingency ranking was achieved by varying the reactive power on the load buses to its maximum loading limit. The maximum reactive power point was taken at each load bus and the critical lines were ranked according to their vulnerability to voltage collapse. The results were compared with other notable voltage stability indices. The results prove that the NVSP is an essential tool in predicting voltage collapse.

Voltage stability improvement and power losses reduction through multiple grid contingency supports

“…In this research, the NVSP proposed in Badrudeen et al (2022b) was employed to suggest the optimal location of STATCOM placement through contingency ranking analysis. This method was employed as the optimization technique for the placement of the contingency support devices for voltage profile improvement and transmission line losses minimization in the power grid.…”

“…The inadequate power supply to meet the daily power demand and the complexity of the power network has led to the occurrence of contingencies such as abrupt load changes, transmission line failure, and malfunctioning power equipment which could pose a notable risk to the grid stability (Patel et al, 2022). Contingency analysis is an essential tool for ensuring the reliability and security of power networks in the presence of load perturbation (Badrudeen et al, 2022b). Thus, identification and management of potential contingencies have become critical for preventing power outages and minimizing their impact (Tiwari et al, 2022).…”

Influence of reactive power compensation from PV systems on electrical grid

“…The basic goal of a power distribution network is to reduce energy losses and improve the transmission process in order to deliver electric energy to the end consumers at the desired quality (THD reduction with <5% as per IEEE 519 standards) [21], efficiency, and reliability [22], [23]. Many scholars have recognized reactive power compensation as a well-known method for reducing power loss while also offering many benefits like PF correction, voltage stability, increased transmission and operating ability of the network lines and devices, and optimization of the voltage profile [24], [25]. These advantages are influenced by different operating limitations and distribution network properties [26].…”