Stability improvement of 200 MW Gabal El-Zayt wind farm connected to electrical grid using supercapacitor and static synchronous compensator during extreme gust

Abstract

This paper proposes constant active and reactive power control of a wind farm during gust using the supercapacitor (SC) and static synchronous compensator (STATCOM). The proposed technique is applied to Gabal El-Zayt wind farm which located in Red Sea region of Egypt with a capacity of 200 MW and equipped with doubly fed induction generators (DFIGs) and analyzed during gust wind. As the nature of wind is varying all time, the output power is changing continuously so energy storage system such as SC is required. SC is responsible for maintaining constant output active power by charging when there is excess in the output power of DFIG and discharging when there is a lack in the output power of DFIG. Reactive power compensation is achieved by connecting STATCOM to the power system. SC keeps reactive power constant however its value is improved by connecting STATCOM. Wind farm model is analyzed during gust with the proposed technique while active and reactive power performance is investigated. Firstly, the effect of connecting SC to each wind turbine is studied. Then the effect of connecting STATCOM to the electric power system is studied. Also, the effect of connecting SCs and STATCOM is studied. Finally, the impact of connecting additional STATCOM at different locations is investigated. Results show the proposed technique validity.

Modeling, Control, and Performance Evaluation of Grid-Tied Hybrid PV/Wind Power Generation System: Case Study of Gabel El-Zeit Region, Egypt

“…The GSC controller sustains the voltage of the DC-bus capacitor constant by keeping the balance between the active power flows from the RSC (P in ) and the injected active power from the GSC (P GSC ), as illustrated in (16)-(17) [8]. Also, it regulates the reactive power exchanged between the backto-back converter and the electrical grid.…”

“…The obtained results illustrate the influence of various extreme gust wind speed fluctuations on the variation of the generated active power and reactive power from the wind farm. Also, Noureldeen et al [8], utilized the STATCOM and the supercapacitor to provide stability improvement of 200 MW Gabel El-Zeit wind farm during a severe wind gust occurrence as a case study of the wind speed variation.…”

Doubly fed induction generators to enhance inter-area damping based on a Robust controller: $${{\varvec{H}}}_{2}/{{\varvec{H}}}_{\infty }$$ Control

“…Also, it remains stable and has the nominal and robust stability together with the nominal and robust performance [3,9]. In references [10,11], a remote-control block and a dynamic stabilizer which improve dynamic oscillation damping have been proposed; however, in these studies, only effects of faults are considered and uncertainties including different operation points are not investigated. In paper [12], an auxiliary controller has been added to the active power control loop which is called the virtual inertial controller and improves the damping of between area oscillations in a system where the inertia of the machines is variable; but, does not take into account different operation points and events.…”

Design of advanced artificial intelligence protection technique based on low voltage ride-through grid code for large-scale wind farm generators: a case study in Egypt

“…The improvement of fault ride through capability for wind turbine driven by DFIG is introduced in [29][30][31][32][33][34]. The design of DFIG active and reactive power control using energy storage system and static synchronous compensator is introduced [35]. Also, other approaches based on current control besides for design of electro-motor-force, flux control, and demagnetization control with DFIG based wind turbines are introduced in [36][37][38][39][40][41][42][43][44].…”