Transient stability prediction of power system; a review on methods, classification and considerations

In this study, by using generator electrical output power and rotor speed, a new algorithm for out-of-step prediction is proposed. In this online method, after fault clearance, the trend of generator output power will be predicted using sinusoidal variable frequency function curve fitting. Finally, time-domain equal area criterion (TDEAC) is used to evaluate the transient stability. The mathematical proofing of TDEAC and its validity in large-scale systems are presented too. Real-time prediction, fast calculation, using only local parameters and estimation of the remaining time until instability are some of the proposed method's advantages. The performance of this algorithm is examined on IEEE 39-bus New England and Iran electrical power network systems. The results show that the proposed method represents a valuable alternative for out-of-step protection possessing fast and high-efficiency performance. The simulations are carried out using the Power Factory® software and the proposed algorithm has been developed in MATLAB.

https://ietresearch.onlinelibrary.wiley.com/doi/pdf/10.1049/iet-gtd.2018.5938

Online synchronous generator out-of-step prediction by electrical power curve fitting

Online synchronous generator out-of-step prediction by ellipse fitting on acceleration power – Speed deviation curve

Transient stability improvement based on out-of-step prediction

Out-of-step operation of synchronous generators causes torsional and electromagnetic stresses. The aim of the paper is to compare three of the m ost used out-of-step protection algorithms, to find out some qualitative indications for protection setting and to evaluate the limits on these algorithms. Electrical and mechanical compone nts and protections have been modeled in ATP and subjected to several fault conditions . The study demonstrates that these algorithms should adapt the clearing time ac cording to the fault location. The next generation of algorithms should consider not only the impedance loci but also the torsional oscillations and their consequences on the generator voltage .

Out of step condition and torsional stress of synchronous generators (EEUG Meeting 2007: European EMTP-ATP Conference) -- (Applications in electrical machines and industry (1))

Alessandro Manunza

Papers

Out of step condition and torsional stress of synchronous generators (EEUG Meeting 2007: European EMTP-ATP Conference) -- (Applications in electrical machines and industry (1))