Small-disturbance voltage stability of distribution systems with wind turbine implemented with WRIG

Abstract

The small-disturbance voltage stability of a gridconnected wound-rotor induction-generator (WRIG) windturbine system is analyzed under different operating conditions. This theoretical study shows the effect of the wound-rotor induction generator and its parameters on load-bus voltage collapse phenomena. Results show that the rotor resistance of the induction generators may decrease the system voltage stability margin and that the transmission line length has an important effect on the maximum loading point and critical point of loading.

A Comprehensive Review on Voltage Stability in Wind-Integrated Power Systems

“…Small disturbance voltage stability is the ability of the power system, for a given initial operating condition, to maintain a steady voltage when subjected to a small disturbance such as an incremental change in load demand [18,73,74]. By making use of sensitivity information, factors affecting the small disturbance voltage stability can be determined.…”

“…If Q-V sensitivity is positive for every bus, the system voltage is stable and vice versa [81,82]. Under various operating conditions, [73] carried out detailed analysis on grid-connected Wound Rotor Induction Generator (WRIG)-based wind turbine system to study the small disturbance voltage stability and concluded that the rotor resistance might reduce the voltage stability margin.…”

Modeling Issues of Grid-Integrated Wind Farms for Power System Stability Studies

“…More sophisticated and well coordinated relaying schemes should be provided to realize the most appropriate protection methodology for wind farm elements [15]- [21]. Insufficient protective elements, non-integrated control scenarios and improper coordination among protective and control strategies may lead to serious problems for large grid-connected wind farms [22]- [27]. As example for these problems is the accident happening in North Germany on November 4, 2006.…”