Evaluation of the transient energy function method for on-line dynamic security analysis

Rahimi, Farrokh; Lauby, M. G.; Wrubel, J.N.; Lee, K.L.

doi:10.1109/59.260834

Cited by 81 publications

(28 citation statements)

References 17 publications

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“…was developed (66,67,78). The method was also given other names, such as the exit point method (56,58,68) and the hybrid method (57). This method is built on a theoretical foundation and yet is computationally efficient.…”

Section: Bcu Methodsmentioning

confidence: 99%

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Power System Stability

Chiang

1999

Wiley Encyclopedia of Electrical and Electronics Engineering

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The sections in this article are Power System Stability Problems The Time‐Domain Approach Direct Methods Direct Methods for Differential Algebraic Equation Systems BCU Method On‐Line Dynamic Security Assessments Voltage Stability Some Further Developments

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Section: Bcu Methodsmentioning

confidence: 99%

“…This method is built on a theoretical foundation and yet is computationally efficient. The practicability and reliability of the BCU method have been evaluated via extensive numerical studies (68). The BCU method is the only direct method adopted by EPRI in its latest version of DIRECT 4.0 (69).…”

Section: Bcu Methodsmentioning

confidence: 99%

Power System Stability

Chiang

1999

Wiley Encyclopedia of Electrical and Electronics Engineering

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“…A hybrid SBS method demands as such more CPU time/step than a conventional SBS method. Furthermore, for practical multimachine systems the times span, that is, length of simulation for both conventional SBS and hybrid SBS methods are the same [5,8]. So in comparing proposed method with the conventional SBS method the latter has been favored regarding its 'on-line' equivalent CPU time considering only the time needed for swing angle computation, that is, 500 seconds and not considering the time needed for deciding stability through plotting and visualization of swing curves.…”

Section: Comparison Of Cpu Timementioning

confidence: 93%

A new method for screening the contingencies before dynamic security assessment of a multimachine power system

Salam

Ahmed

2006

Int Trans Elec Energy Syst

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SUMMARYThis paper proposes a novel method for identifying the faults that would impact the transient stability of a multimachine power system. In this method each synchronous machine's swing equation is formulated in the form of a closed loop transfer function in Laplace domain (s-plane). The duration of a fault under consideration, and the changes of maximum electrical power output of the machine during and after the fault are included in the same transfer function. Then the narrowest possible range containing the real part of the 'dominant' root of each machine's characteristic equation is identified on the real axis of s-plane. This is because it is the real part that decides whether the transient response would sustain or subside. If the average of the lower limits of the real parts of dominant roots for all the machines is in the left half but very close to the imaginary axis (poorly damped) or in the right half of the s-plane (absence of damping), the system as a whole is unstable under the considered fault. The proposed method is extremely fast. An extensive digital simulation test and comparison of the proposed method with a conventional step-by-step (SBS) numerical integration method has been done on a 25-machine practical system belonging to Bangladesh Power Development Board (BPDB), and good agreements observed for an array of fault scenarios. The faults for which the aforesaid average lower limit is in the left half plane but its distance from imaginary axis is marginally above or below an established minimum value, can be further investigated by a detailed time domain simulation (TDS) transient stability analysis technique. Thus the proposed method is useful for real-time screening of the contingencies (e.g., faults) before being subjected to a full-scale dynamic security analysis in a power system of any size with any number of machines.

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“…Another advantage of the BCU method is the ability to provide useful information regarding how to derive preventive control actions when the underlying power system is deemed unstable. A three-year project, sponsored by the Electric Power Research Institute (EPRI), has confirmed the practicability and reliability of the BCU method via extensive numerical evaluations [29], [30]. the BCU method is the only direct method adopted by EPRI in its latest version of DIRECT 4.0 [36].…”

Section: Theorem 2: (Static Relationship)mentioning

confidence: 99%