A Passivity Interpretation of Energy-Based Forced Oscillation Source Location Methods

Chevalier, Samuel; Vorobev, Petr; Turitsyn, Konstantin

doi:10.1109/tpwrs.2020.2973070

Cited by 20 publications

(7 citation statements)

References 16 publications

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“…The design parameters of the controller are as follows: T d1 = 0.4867 s, T d2 = 0.0543 s, and T w = 10 s. Three different DEF scenarios are simulated by varying K p values: (i) K p = 0, implying, ∆k c = 0 and the TCSC is operating under fixed compensation, (ii) K p = 0.0527, the design value to achieve the desired poleplacement for a well-damped transient response, and (iii) K p = −0.0527, negative of the design value in (ii). Since, the TCSC is connected to one of the lines between buses 8 and 9, we calculate the DEFs out of the TCSC 4,5 into the buses 8 and 9. The total DEF out of the TCSC into the network is the sum of these two individual DEFs.…”

Section: Def Analysis Of a Tcscmentioning

confidence: 99%

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Extending the Dissipating Energy Flow Method to Flexible AC Transmission Systems

Chatterjee¹,

Samanta²,

Chaudhuri³

2021

Preprint

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In recent years, the dissipating energy flow (DEF) method has emerged as a promising tool for online localization of oscillation sources. In literature, the mathematical foundations of this method is well-studied for networks with synchronous generators. In this paper, we extend the analysis to felxible AC transmission systems (FACTS). To that end, we derive the DEFexpressions for a thyristor controlled series capacitor (TCSC) and a static synchronous compensator (STATCOM) operating with conventional control strategies. Analyzing their respective DEFs, we obtain the conditions for which these FACTS devices could behave as the sources of oscillation energy. Our findings are structured into propositions and are supported through numerical case studies on IEEE test systems.

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Section: Def Analysis Of a Tcscmentioning

confidence: 99%

“…by definition (see, (2), (4)), W D is flowing into the device, and −W D out of the device5 measured at 8 using the ∆P ik flowing into 8 from the TCSC, and at 9 using the ∆P ik flowing into 9 from the TCSC…”

mentioning

confidence: 99%

Extending the Dissipating Energy Flow Method to Flexible AC Transmission Systems

Chatterjee¹,

Samanta²,

Chaudhuri³

2021

Preprint

View full text Add to dashboard Cite

show abstract

“…The theoretical deductions leading to the method assume the transmission network to be lossless and the loads to be of constant power nature [3], [5]. In [2], [6]- [8] the impact of these assumptions on the accuracy of the method are examined. The real-world oscillation case studies [2] concluded that, although constant impedance loads obfuscate the energy flows in a network, their impacts on oscillation source localization are not critical.…”

Section: Introductionmentioning

confidence: 99%

A Passivity-Based Small-Signal DEF Analysis for Low Frequency Oscillation Source Characterization of VSC-HVdc

Chatterjee¹,

Samanta²,

Chaudhuri³

2023

Preprint

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<p>In bulk power systems, detecting the sources of low-frequency oscillations is a challenging problem. Among the techniques available, the dissipating energy flow (DEF) method has emerged as a promising tool with notable success with real-world oscillation cases. While the mathematical justifications for the method's characterization of a device as an oscillation source (or sink) is well-studied for synchronous generators and standalone inverters, no insights have been developed for power-electronics-interfaced dc transmission systems. To fill this gap, this paper presents a theoretical analysis of the DEF in a voltage source converter-based high voltage direct current (VSC-HVdc) system. Passivity-based analysis is performed to explain why a VSC-HVdc system, operating at unity power factor, with the commonly used control strategy involving constant real power control, dc-link voltage control, and ac voltage -- reactive power droop control or constant reactive power control is a source of oscillation energy. Supporting case studies are performed on the IEEE 4-machine and 16-machine test systems. </p>

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“…In the literature, numerous theoretical analyses for VLFO source identification are available [8][9][10][11][12][13][14][15], a detailed review can be found in [16]. However, it is well recognised that Dissipation Energy Flow (DEF) [17] [18] is considered one of the most promising and already has some practical success in real-world applications.…”

Section: Introductionmentioning

confidence: 99%

“…The comparative analysis of Mode Shape and the DEF-based approach was investigated in [22], where both methods can identify the source of oscillations. However, DEF based approach where its underlying mathematics is based on the Lyapunov functions [11] [23] has the advantage of identifying the generating units with 'positive damping' or 'negative damping' contributions. It is worth noting that the RMS Energy filter [24] approach is being used by TSOs on the western American power grid for oscillation detection.…”

Section: Introductionmentioning

confidence: 99%

Very Low-Frequency Oscillation Source Localization on Ireland's Power System

Duggan

Liu

Brogan

et al. 2022

IEEE Open J. Ind. Applicat.

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This paper presents an approach for studying Very Low-Frequency Oscillations (VLFOs) between 0.03 and 0.08 Hz that have been observed on Irelands All-Island transmission system. Previous work by Ireland's TSO has found that the occurrence of the VLFO is linked to the generation dispatch of synchronous machines with governor control. This study verifies previous research by Ireland's TSO and analyses sensitivities such as inertia, system frequency and online generator status that causes an increase in VLF mode magnitude. This paper's results are based on 1-second resolution system frequency, metered generation and power system metric data from 1/1/2018 to 1/10/2020. This analysis demonstrates that the VLF oscillatory mode's stability is highly correlated if governors that consistently provide positive damping torque to the VLF mode are not synchronized. The findings from the study are demonstrated on several events on the Irish system using PMU data. The governor-based dissipating energy flow method is used to validate the relationships found from the generator status and system frequency case study.

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A Passivity Interpretation of Energy-Based Forced Oscillation Source Location Methods

Cited by 20 publications

References 16 publications

Extending the Dissipating Energy Flow Method to Flexible AC Transmission Systems

Extending the Dissipating Energy Flow Method to Flexible AC Transmission Systems

A Passivity-Based Small-Signal DEF Analysis for Low Frequency Oscillation Source Characterization of VSC-HVdc

Very Low-Frequency Oscillation Source Localization on Ireland's Power System

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