Examples of processing low-frequency oscillations in Russia and ways to improve the analysis

Popov, A.I.; Dubinin, Dmitry M.; Mokeev, Alexey V.; Butin, Kirill; Rodionov, A.V.; Piskunov, Sergey A.

doi:10.1109/sgsma51733.2022.9805996

Cited by 3 publications

(2 citation statements)

References 8 publications

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“…The detection of an LFO source based on the estimation of oscillatory energy demonstrated high efficiency [7,2]. In [14], an integral expression was derived for the energy of oscillations.…”

Section: Dissipating Energy Flow Methodsmentioning

confidence: 99%

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Investigation the influence of the parameters of the computational scheme on detecting the source of low-frequency oscillations

2023

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The dispatching control requires the ability to detect the source of low-frequency oscillations in the power system based on the online processing of synchrophasor measurements data. This is a complex task; therefore, new approaches to its solution and variations of existing ones are constantly emerging. As a rule, a short expression of the criterion of a particular method hides a number of stages of computational data processing. The number of possible implementations of these stages increases during the investigation. The set, settings, implementation of the stages of the computational scheme, and combination of these stages affect the final result. Earlier, the authors developed a high-performance software platform that allows describing computational schemes in a general way, and then performing calculations with specified sets of algorithms. In this paper, a generalized calculation scheme for the dissipating energy method is constructed, and experiments are performed showing the influence of details of the implementation of data processing stages on the result of the online detection of the source of lowfrequency oscillations.

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Section: Dissipating Energy Flow Methodsmentioning

confidence: 99%

“…Paper [2] analyzes a number of LFO cases that have occurred in the Russian power system in recent years.…”

Section: Introductionmentioning

confidence: 99%

Investigation the influence of the parameters of the computational scheme on detecting the source of low-frequency oscillations

2023

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Improvement of distance protection algorithms based on phasor measurements

Mokeev

Piskunov

2023

E3S Web of Conf.

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Distance protection of overhead lines is widely used and is continually being improved. However, the distance protection cannot work stably and is blocked in several electromechanical transients. Additionally, a non-linear arc can affect the stability of the distance protection in case of a short-circuit. The authors consider ways to improve distance protection during such transients. In particular, this paper proposes the use of synchronized phasor measurement technology to improve the efficiency of distance protection. This paper considers a new approach for the analysis of electromechanical and electromagnetic transients in a power system using process synchrophasors. As examples, cases of a short-circuit in a line with oneway and two-way powers are considered. The authors consider the influence of a non-linear arc at the fault point and consider the possibility of the coincidence of the electromechanical and electromagnetic transients. The result is a new algorithm for operating distance protection, an improvement in the parametric method for determining the location of line damage. The calculations performed and mathematical modeling confirm the effectiveness of the proposed algorithm.

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Development of methods for visual representation of low-frequency oscillation parameters in power systems

Popov,

Butin,

Rodionov

2023

E3S Web Conf.

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The development of wide area measurement system (WAMS) expands the analysis capabilities of the Unified power system based on computational processing of synchronized phasor measurements (SPM). The analysis of low-frequency oscillations (LFO) in the power system is one of the most relevant applications of WAMS data. The task of locating the source of forced LFO in real-time is highlighted. Due to the increasing complexity and heterogeneity of real power systems, a definitive solution to this problem does not currently exist. However, there are SPM data analysis methods that provide a high probability of identifying the source of oscillations. Informative representation of measurement signals, intermediate, and final LFO analysis results can serve as the basis for decision support tools for operational dispatch personnel. Direct visualization of raw data and computed parameters, such as a set of time function graphs, is inefficient due to the large volume. Therefore, compact high-level representations are in demand. This paper proposes some approaches to visualizing SPM data, computed LFO parameters, and the results of applying various oscillation source detection methods. The presented data visualization methods have been implemented by the authors in a LFO analysis software system.

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Examples of processing low-frequency oscillations in Russia and ways to improve the analysis

Cited by 3 publications

References 8 publications

Investigation the influence of the parameters of the computational scheme on detecting the source of low-frequency oscillations

Investigation the influence of the parameters of the computational scheme on detecting the source of low-frequency oscillations

Improvement of distance protection algorithms based on phasor measurements

Development of methods for visual representation of low-frequency oscillation parameters in power systems

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