Stability improvement in power systems with non‐linear TCSC control strategies

Abstract

In this perper. ci non-linear control scheme fiw tile TCSC (thyristor-c~ontrollecl series compensator) to deimpen power oscillations and to improve the trcinsient stability of power systems is presentecl. Based on an one-mcichirze-irifnite-btis system, CI non-linear mrithematiccil model is estciblished which is proven as an ciflnr nonlinenr system. With the help of the feeclbtick 1ineriri:ation technique, the ctffine non-linear model is e.ractly tninsferred to a linecir moclel, and then the control scheme is designeclfor the TCSC based on the global linearizcition, where the input signeil uses local meeisrirements onlv. The e~j+ctivene.s.s ant1 roblrstness of the proposed non-linecir control scheme nre detnmn.strcitetl with cin one-mtdiine test svstem, where the TCSC modell i t i s cind power system simtilations Lire perfr,rmecl by itsing the progrcitn system NETOMAC. I n compeiriwn with ( I conventioncrl control scheme. significtint improvements of clwomiccil performnnce in the test power ' sv.stem (ire cichieved bv the proposeel non-lineor control strcitegy fiw the TCSC.

Effects of different generator reactive power limits representation on load margins

“…Recently, reference 3 showed the impact of the reverse effects of control actions when the system is working on the unstable side of the QV curve. 21 The impact in the voltage level is discussed in 22 since it could influence the reactive power margin. References 8,10 discussed another issue regarding the QV curves of generators.…”

“…These devices help the operation and have consequences in transient stability. 21 The impact in the voltage level is discussed in 22 since it could influence the reactive power margin. Even though this is not considered here, its inclusion is not a limitation of the proposed methodology.…”

Guaranteed-cost reliable control with regional pole placement of a power system

“…Besides PSSs, flexible ac transmission (FACTS) controllers are also applied to enhance system stability [3,[9][10][11]. Particularly, in multi-machine systems, using only conventional PSS may not provide sufficient damping for inter-area oscillations.…”

A new approach for fault classification and section detection in compensated transmission line with TCSC

“…The Thyristor Controlled Series Capacitor (TCSC) is also a type of series compensator, can provide many benefits for a power system including controlling power flow in the line, damping power oscillation, and mitigating sub-synchronous resonance [1,3,4].…”