Torsional oscillations of series capacitor compensated AC/DC systems

Hamouda, R.M.; Iravani, M.R.; Hackam, R.

doi:10.1109/59.32576

Cited by 23 publications

(11 citation statements)

References 11 publications

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“…8 rev& that the real parts of the eigenvalues change erratically during the coordination process. This is amibuted to the fact that the Q of each oscillatory mode is significantly more sensitive to the parameters of single channel SVC auxiliary controllers as compared with the parameter of multichannel SVC auxiliary controllers [13,14]. Fig.…”

Section: Results Of Casementioning

confidence: 92%

A software tool for coordination of controllers in power systems

Iravani¹

1990

IEEE Trans. Power Syst.

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This paper repom the theoretical background and the methodology of development of a software tool for off-line coordination of power system conmollen in either a high-fiwIuency range (5-55 Hz) or a low-frequency range (0.1-2.0 Hz). The controllers considered for coodination are: voltage regulators, power system stabiirs (PSSs). speed governors, main and auxiliary controllers of HVDC converters, and main and auxiliary controllers of static VAr compensators (SVCs). The software package calculates the eigenvalues associated with a piespecified number of least stable oscillatory modes of the system using a modified version of the "S matrix method'', and adjusts the controller parameters to increase the damping of the least stable mode. using a gradient optimization technique. The s~ftware tool is referred to as EICO (Eigenvalue program for COordination of controllers). EICO is coded inThe application of EICO is demonstrated by coordinating the controllers of a power system with 371 state variables and 140 controller parameters, in the high-frequency range. EICO results are veriEed by detailed digital simulation of the system. using the BPA's ElectmMagnetic Transients Program (EMTP). The study results demonstrate the technical advantages of the coordinated controllers as compared with the non-coodnated scheme.

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Section: Results Of Casementioning

confidence: 92%

A software tool for coordination of controllers in power systems

Iravani¹

1990

IEEE Trans. Power Syst.

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“…From those expressions, the active power increases if the compensation k increases, at the cost of the large series capacitor reactive power, which sharply increases with k [3]. According to the phasor diagram of Figure 4d, this reduces the voltage drop and the angular deviation between the sending and receiving line ends, providing [4]: increased transmission capacity [18], possibility of modifying the power flows in the meshed network [19], improved voltage profile of the grid [20], enhanced angular stability of the power corridor [21,22], damping of power oscillations [23,24], and the possibility of optimizing power transported by parallel lines [25]. In addition, it has to be considered that series compensation may interfere with the conventional power system operation.…”

Section: Series Compensation By Inserting Capacitorsmentioning

confidence: 99%

Series Compensation of Transmission Systems: A Literature Survey

2021

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This paper reviews the basics of series compensation in transmission systems through a literature survey. The benefits that this technology brings to enhance the steady state and dynamic operation of power systems are analyzed. The review outlines the evolution of the series compensation technologies, from mechanically operated switches to line- and self-commutated power electronic devices, covering control issues, different applications, practical realizations, and case studies. Finally, the paper closes with the major challenges that this technology will face in the near future to achieve a fully decarbonized power system.

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“…Similarly, for a parallel R-C circuit connected between node 1 and the ground, as shown in Fig. 11: (19) and…”

Section: Appendix Dynamic Ac Network Modelmentioning

confidence: 99%

A Hybrid Network Model for Small Signal Stability Analysis of Power Systems

Karawita

Annakkage

2010

IEEE Trans. Power Syst.

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Small signal stability analysis in a power system is typically concerned with electromechanical oscillations. For this purpose, it is adequate to model the transmission system using a constant admittance matrix. For torsional oscillations and HVDC interactions, the frequency of interest is much higher and the constant admittance representation is not sufficient. This paper proposes a hybrid model, which allows the parts of the transmission network in the vicinity of HVDC converters or any other dynamic devices to be modeled with their dynamics and the remaining parts to be modeled as constant admittances. The proposed hybrid methodology for small signal stability assessment is the main contribution of this paper. The proposed methodology is validated against an electromagnetic transient simulation program (PSCAD/EMTDC) using time responses. The proposed model and two other small signal models are compared against each other in the frequency domain using modal analysis.Index Terms-Dynamic ac network model, HVDC interactions, small signal stability.

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Torsional oscillations of series capacitor compensated AC/DC systems

Cited by 23 publications

References 11 publications

A software tool for coordination of controllers in power systems

A software tool for coordination of controllers in power systems

Series Compensation of Transmission Systems: A Literature Survey

A Hybrid Network Model for Small Signal Stability Analysis of Power Systems

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