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Hybrid algorithm for rotor angle security assessment in power systems
- Source :
- The Journal of Engineering (2015)
- Publication Year :
- 2015
- Publisher :
- Wiley, 2015.
-
Abstract
- Transient rotor angle stability assessment and oscillatory rotor angle stability assessment subsequent to a contingency are integral components of dynamic security assessment (DSA) in power systems. This study proposes a hybrid algorithm to determine whether the post-fault power system is secure due to both transient rotor angle stability and oscillatory rotor angle stability subsequent to a set of known contingencies. The hybrid algorithm first uses a new security measure developed based on the concept of Lyapunov exponents (LEs) to determine the transient security of the post-fault power system. Later, the transient secure power swing curves are analysed using an improved Prony algorithm which extracts the dominant oscillatory modes and estimates their damping ratios. The damping ratio is a security measure about the oscillatory security of the post-fault power system subsequent to the contingency. The suitability of the proposed hybrid algorithm for DSA in power systems is illustrated using different contingencies of a 16-generator 68-bus test system and a 50-generator 470-bus test system. The accuracy of the stability conclusions and the acceptable computational burden indicate that the proposed hybrid algorithm is suitable for real-time security assessment with respect to both transient rotor angle stability and oscillatory rotor angle stability under multiple contingencies of the power system.
- Subjects :
- Damping ratio
Engineering
damping ratio
Stability (learning theory)
Energy Engineering and Power Technology
Electric generator
oscillatory rotor angle stability assessment
Lyapunov exponent
computational burden
dynamic security assessment
DSA
law.invention
Electric power system
symbols.namesake
law
Control theory
power system stability
50-generator 470-bus test system
power system fault
rotor angle security assessment
LE concept
Lyapunov methods
Prony algorithm
power system transients
damping
computational complexity
business.industry
General Engineering
power system faults
transient rotor angle stability assessment
Hybrid algorithm
Power (physics)
rotors
Lyapunov exponent concept
power system security
lcsh:TA1-2040
symbols
Transient (oscillation)
electric generators
16-generator 68-bus test system
business
lcsh:Engineering (General). Civil engineering (General)
Software
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- The Journal of Engineering (2015)
- Accession number :
- edsair.doi.dedup.....ccbcbb23fab8313f3ae9dfd0dba92ced