Forced oscillation source location in power systems using system dissipating energy

Jha, Rajiv; Senroy, Nilanjan

doi:10.1049/iet-stg.2018.0293

“…Notwithstanding these limitations, the success of the method is widely recognized, as is evident from its successful adoption in the oscillation management system of ISO-NE [2]. In the recent years, extensions and improvements on the existing DEF method have also been studied -notable of these are [6], [10]- [12].…”

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

0

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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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“…Notwithstanding these limitations, the success of the method is widely recognized, as is evident from its successful adoption in the oscillation management system of ISO-NE [2]. In the recent years, extensions and improvements on the existing DEF method have also been studied -notable of these are [6], [10]- [12].…”

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

0

View full text Add to dashboard Cite

<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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“…With the rapid deployment of Phasor Measurement Units (PMUs) in modern power systems, both natural oscillation (NO) and forced oscillation (FO) are now commonly observed. The presence of these oscillations introduces negative impacts such as reduced system reliability and equipment life, limited power-transferring capability and higher power losses, and sometimes can result in cascaded failure and even blackout [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

A novel method for locating the source of sustained oscillation in power system using synchrophasors data

Zuhaib

¹

,

Rihan

²

,

Saeed³

2020

Prot Control Mod Power Syst

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Large interconnected power systems are usually subjected to natural oscillation (NO) and forced oscillation (FO). NO occurs due to system transient response and is characterized by several oscillation modes, while FO occurs due to external perturbations driving generation sources. Compared to NO, FO is considered a more severe threat to the safe and reliable operation of power systems. Therefore, it is important to locate the source of FO so corrective actions can be taken to ensure stable power system operation. In this paper, a novel approach based on two-step signal processing is proposed to characterize FO in terms of its frequency components, duration, nature, and the location of the source. Data recorded by the Phasor Measurement Units (PMUs) in a Wide Area Monitoring System (WAMS) is utilized for analysis. As PMU data usually contains white noise and appears as multi-frequency oscillatory signal, the first step is to de-noise the raw PMU data by decomposing it into a series of intrinsic mode functions (IMF) using Improved Complete Ensemble Empirical Mode Decomposition with Adaptive Noise (ICEEMDAN) technique. The most appropriate IMF containing the vital information is selected using the correlation technique. The second step involves various signal processing and statistical analysis tools such as segmented Power Spectrum Density (PSD), excess kurtosis, cross PSD etc. to achieve the desired objectives. The analysis performed on the simulated two-area four-machine system, reduced WECC-179 bus 29 machine system, and the real-time power system PMU data set from ISO New England, demonstrates the accuracy of the proposed method. The proposed approach is independent of complex network topologies and their characteristics, and is also robust against measurement noise usually contained in PMU data.

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Forced oscillation source location in power systems using system dissipating energy

Cited by 12 publications

References 27 publications

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

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

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

A novel method for locating the source of sustained oscillation in power system using synchrophasors data

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