Ercot experience screening for Sub-Synchronous Control Interaction in the vicinity of series capacitor banks

Adams, John; Pappu, Venkata Ajay; Dixit, Ankit

doi:10.1109/pesgm.2012.6345409

Cited by 81 publications

(31 citation statements)

References 2 publications

(2 reference statements)

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“…Since the DC components decay rapidly (αd=961.7), the expression of the instantaneous power can be established by ignoring the DC terms, as shown in (2).…”

Section: B Characteristics Of Sspmentioning

confidence: 99%

“…It means that this term does not lead to the accumulation of energy in the capacitor. (2) Component that grows at a rate of e -2at , i.e. the 2 nd term.…”

Section: B Characteristics Of Sspmentioning

confidence: 99%

“…T is well known that the series compensated wind farm systems are vulnerable to subsynchronous resonance (SSR) due to the interaction between the series capacitor and the doublyfed induction generator (DFIG) [1]. Several SSR events have been reported in wind farms of USA and China [2]- [4]. During these incidents, SSR became so strong that it caused the tripping of a large number of wind turbines (WTs) or even damaged some of the generators' crowbar circuits.…”

Section: Introductionmentioning

confidence: 99%

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Identifying and Ranking Sources of SSR Based on the Concept of Subsynchronous Power

Gao

Wang

et al. 2020

IEEE Trans. Power Delivery

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This paper presents a measurement-based method for real-time determination of the wind farms or wind turbines that contribute most significantly to a subsynchronous resonance (SSR) event. The method is based on the concept of subsynchronous power (SSP). This paper has shown it is the SSP that drives the SSR. By monitoring the direction and amount of SSPs produced by different wind farms or turbines, the most critical wind farms or turbines can be identified and quantified. A dq0 transform based algorithm is developed to calculate the SSP in real time. The method overcomes the interference of fundamental frequency components and non-steady-state SSR components on the extraction of the SSP component. Several test cases have demonstrated the usefulness of the proposed concept and method.

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“…Since the DC components decay rapidly (αd=961.7), the expression of the instantaneous power can be established by ignoring the DC terms, as shown in (2).…”

Section: B Characteristics Of Sspmentioning

confidence: 99%

“…It means that this term does not lead to the accumulation of energy in the capacitor. (2) Component that grows at a rate of e -2at , i.e. the 2 nd term.…”

Section: B Characteristics Of Sspmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Identifying and Ranking Sources of SSR Based on the Concept of Subsynchronous Power

Gao

Wang

et al. 2020

IEEE Trans. Power Delivery

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“…The modular multi-level converter (MMC) has become one of the most promising topologies of high voltage direct current (HVDC) systems, due to its more flexible control scheme and lower manufacturing difficulty [1,2]. However, it also brings some oscillation problems in power systems, similar to the oscillation problems in the renewable energy power system [3,4]. As reported, some oscillation phenomena have appeared in the asynchronous interconnection system and the offshore wind farm, where MMC-HVDC system is integrated [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Disturbance-State Modeling and Oscillation Analysis of Modular Multilevel Converters under P/Q Control Mode

Xing

Zhang

et al. 2020

Energies

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To investigate the oscillation problems in power systems with modular multilevel converters (MMCs), a disturbance-state model of the MMC under P/Q control mode is established based on the harmonic state-space (HSS) method. Firstly, the basic structure of the MMC with P/Q control is presented, including the circuit structure and the controller structure. Next, the dynamic characteristics of each module in the MMC are described with the time-domain state-space model or the s-domain transfer function. The complete controller structure is considered, including the P/Q outer-loop controller, the inner-loop control, the phase-locked loop (PLL), the circulating current suppression control (CCSC) and the control delay. On the basis, the disturbance-state HSS model of the MMC and its corresponding steady-state condition are established by the HSS method. Lastly, the case studies are performed to verify the accuracy of the proposed model, based on an MMC based test system in PSCAD/EMTDC. Moreover, one oscillation phenomenon in test system is illustrated by analyzing the AC-side impedance characteristics based on the proposed model. The results indicate that the MMC system under P/Q control mode has certain oscillation risk due to its negative resistance effect and the proposed model could be applied to its oscillation analysis.

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“…4,5)and(Figs. 7,8,9) institutes the effectiveness of the supplemental control in damping the torsional torques in all turbine-generator shaft sections as well as in mitigating SSI in wind farm A.…”

mentioning

confidence: 99%

On the use of wind energy conversion systems for mitigating subsynchronous resonance and subsynchronous interaction

Gao

Karaagac

Faried

et al. 2014

IEEE PES Innovative Smart Grid Technologies, Europe

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The paper highlights the potential use of wind energy conversion systems for the mitigation of Subsynchronous Resonance (SSR) and Subsynchronous Interaction (SSI). SSR and SSI damping is attained by introducing supplemental control signals in the reactive power control loops of the grid side converters of Full-Frequency Converter (FFC) and Doubly-Fed Induction Generator (DFIG) wind turbines. The effectiveness of the supplemental control in mitigating the two phenomena is demonstrated on a test benchmark through time domain simulation studies using EMTP-RV. IndexTerms -Series capacitive compensation, subsynchronous interaction, subsynchronous resonance, wind energy.

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Ercot experience screening for Sub-Synchronous Control Interaction in the vicinity of series capacitor banks

Cited by 81 publications

References 2 publications

Identifying and Ranking Sources of SSR Based on the Concept of Subsynchronous Power

Identifying and Ranking Sources of SSR Based on the Concept of Subsynchronous Power

Disturbance-State Modeling and Oscillation Analysis of Modular Multilevel Converters under P/Q Control Mode

On the use of wind energy conversion systems for mitigating subsynchronous resonance and subsynchronous interaction

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