Probabilistic Assessment of Voltage Stability Margin in Presence of Wind Speed Correlation

Probabilistic Assessment of Voltage Stability Margin in Presence of Wind Speed Correlation

Probabilistic assessment of voltage stability margin (VSM) with existence of correlated wind speeds is investigated. Nataf transformation is adopted to establish wind speed correlation (WSC) model. Based on the saddle-node bifurcation transversality condition equations and Monte Carlo simulation technique, probability distribution of VSM is determined. With correlation coefficients range low to...

A Novel Index for Online Voltage Stability Assessment Based on Correlation Characteristic of Voltage Profiles

Abstract: Voltage instability is a major threat for security of power systems. Preserving voltage security margin at a certain limit is a vital requirement for today’s power systems. Assessment of voltage security margin is a challenging task demanding sophisticated indices. In this paper, for the purpose of on line voltage security assessment a new index based on the correlation characteristic...

Probabilistic assessment of oscillatory stability margin of power systems incorporating wind farms

Keywords: Oscillatory stability margin Monte Carlo simulation Nataf transformation Statistical indices Wind power a b s t r a c t With the increase in penetration of wind power which is essentially intermittent and random, the dynamic performance of the power system will change significantly, and so will the characteristics of the oscillations and their stability margins. This paper provides an...

Voltage Security Margin Assessment

Effect of Wind Speed and Load Correlation on ELCC of Wind Turbine Generator

Utilization of wind turbines as economic and green production units, poses new challenges to the power system planners, mainly due to the stochastic nature of the wind, adding a new source of uncertainty to the power system. Different types of distribution and correlation between this random variable and the system load makes conventional method inappropriate for modeling such a correlation. In...