Damping torque analysis for DC bus implemented damping control

Du, Wen; Wang, H F; Ju, Ping; Dunn, R.W.

doi:10.1002/etep.310

Cited by 7 publications

(6 citation statements)

References 12 publications

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“…By using the approach based on the graphical explanation, it is analytically concluded that in the multi-machine power system, STATCOM voltage control contributes no damping to the power system oscillation. Thus the same conclusion obtained and proved in References [7,8] for the SVC and STATCOM voltage control in single-machine infinite-bus power systems is established mathematically in this paper in the more general case of multi-machine power systems. In the paper, a method similar to the phase compensation method is proposed based on the graphical explanation of the DTA for the design of STATCOM stabilizer in the multi-machine power system.…”

Section: Discussionsupporting

confidence: 75%

“…In the case of singlemachine infinite-bus power system, References [7] and [8] has provided a theoretical proof respectively that SVC and STATCOM voltage control contributes little damping torque by using the DTA. Here from Equation (12), it can be seen that STATOM voltage control provides the forced variation of active power delivered along the transmission line in the multi-machine power system to be proportional only to Du.…”

Section: Linearization Of the Above Equation Givesmentioning

confidence: 98%

“…For example, by using the DTA, [7] confirmed that SVC (static var compensator) voltage control in a singlemachine infinite-bus power system provides little damping torque and hence imposes little impact on the damping of power system oscillations. Similarly, Reference [8] proved that STATCOM (static synchronous compensator) voltage control in a single-machine infinite-bus power system contributes no damping to power system oscillations. This was a conclusion which had been established previously from the case study of calculation and simulation of practical example power systems [9][10][11][12].…”

Section: Introductionmentioning

confidence: 98%

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Graphical explanation of the damping torque analysis method and its applications in multi‐machine power systems

Wei

Wang

et al. 2009

Int Trans Elec Energy Syst

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SUMMARYDamping torque analysis (DTA) is a well-developed technique for understanding and studying power system oscillations. It is established on the basis of physical explanation of damping torque contribution of power system control to the rotor motion of generator. Hence when it is applied in a multimachine power system, the DTA becomes complicated due to the involvement of large number of generators. In this paper, a graphical explanation of the DTA method is presented by using the small-signal equal-area criterion of power system stability analysis. The graphical explanation presented turns out to be completely independent of the physical concept of damping torque, indicating the significant potential to develop the graphical explanation into a general and simple approach for understanding and studying multi-machine power system oscillations. In the paper, an example of a multi-machine power system installed with a STATCOM (static synchronous compensator) is given to demonstrate how the potential of applying graphical explanation can be explored. Based on the conclusion drawn from the graphical explanation, it is shown why the STATCOM voltage control contributes little damping to power system oscillations and a simple method of designing a STATCOM stabilizer is proposed. Confirmation from simulation results of an example four-machine power system is presented in the paper.

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Section: Discussionsupporting

confidence: 75%

Section: Linearization Of the Above Equation Givesmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 98%

See 1 more Smart Citation

Graphical explanation of the damping torque analysis method and its applications in multi‐machine power systems

Wei

Wang

et al. 2009

Int Trans Elec Energy Syst

Self Cite

View full text Add to dashboard Cite

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“…This is quite similar to the voltage control function of a static Var compensator (SVC) or static synchronous compensator (STATCOM). The previous study has confirmed that the voltage control function of the SVC and STATCOM has little effect on the damping of power system oscillations [16–20].…”

Section: Dta For a Grid‐connected Dfigmentioning

confidence: 94%

Damping torque analysis of power systems with DFIGs for wind power generation

Wei

et al. 2016

IET Renewable Power Generation

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A grid-connected DFIG for wind power generation can affect power system small-signal angular stability in two ways: by changing the system load flow condition and dynamically interacting with synchronous generators (SGs). This paper presents the application of conventional method of damping torque analysis (DTA) to examine the effect of DFIG's dynamic interactions with SGs on the small-signal angular stability. It shows that the effect is due to the dynamic variation of power exchange between the DFIG and power system and can be estimated approximately by the DTA. Consequently, if the DFIG is modelled as a constant power source when the effect of zero dynamic interactions is assumed, the impact of change of load flow brought about by the DFIG can be determined. Thus the total effect of DFIG can be estimated from the result of DTA added on that of constant power source model. Applications of the DTA method proposed in the paper are discussed. An example of multi-machine power systems with grid-connected DFIGs are presented to demonstrate and validate the DTA method proposed and conclusions obtained in the paper.

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“…With supplementary controllers, flexible alternating current transmission system (FACTS) devices can also be used to enhance the damping of low‐frequency power oscillations. Through the modulation of bus voltage, the phase shift between buses, and transmission line reactance, FACTS devices show promising results in enhancing both the dynamic and static performances of power systems .…”

Section: Introductionmentioning

confidence: 99%

Damping of interarea oscillations using electronic power transformer

Huang

Mao

Zhang

et al. 2014

Int. Trans. Electr. Energ. Syst.

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Summary This study utilizes the electronic power transformer (EPT) to enhance the damping of interarea oscillations in a multimachine power system based on active power modulation. The dynamic model of EPT is established, and decoupled vector control schemes of inner current control loops and outer active and reactive power control loops are modeled and designed. A power oscillation damper (POD) applied to the active power control loop of EPT is introduced to improve the stability of the power system. The POD controller parameters are designed based on the frequency response method. A study system based on the classical two‐area four‐machine system is built for damping controller design and time domain simulation, and the design procedures are presented in detail. The effectiveness of the designed POD controller is verified through eigenvalue analysis and time domain simulations. Copyright © 2014 John Wiley & Sons, Ltd.

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Damping torque analysis for DC bus implemented damping control

Abstract: -Damping torque analysis is a well-developed technique for understanding and studying power system oscillations. This paper presents the applications of damping torque analysis for DC bus implemented damping control in power transmission networks in two

Cited by 7 publications

References 12 publications

Graphical explanation of the damping torque analysis method and its applications in multi‐machine power systems

Graphical explanation of the damping torque analysis method and its applications in multi‐machine power systems

Damping torque analysis of power systems with DFIGs for wind power generation

Damping of interarea oscillations using electronic power transformer

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