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Abstract <p>One of the tests used in verifying synchronized vector-measurement devices is testing under conditions of the asynchronous mode of a power system. In the standards for vector measurements, the signals of the above tests are normalized in the form of modulated signals with separate modulation of amplitude and phase within restricted limits, due to which the signal regulated by the standards differs significantly from the signal in the real asynchronous mode. Moreover, when the electric center of oscillation approaches the location of the synchronized vector-measurement device, the signal model obtained in accordance with the standard loses the reliability of representing the asynchronous mode signal. In order to increase the relevance of the signal model to the processes in the asynchronous mode, it is proposed to use a dual-frequency asynchronous-mode signal for testing. The characteristics of the models are compared based on the concept of the vector error of the models, which estimates the difference between them as the absolute distance between their theoretical synchronization vectors. The refusal to use the concept of the full vector error for assessing the discrepancy between the models and the introduction of a new concept of model error are caused by the need to compare theoretical synchronization vectors, and not device measurements. Comparison of theoretical synchronization vectors corresponding to models from standards and dual-frequency asynchronous mode within the framework of the measure of vector error of the models shows that their difference already at the modulation coefficients provided by the standards exceeds 10%, which confirms the need to modernize existing approaches to testing synchronized vector-measurement devices.</p>

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Features of Testing Devices of Synchronized Vector Measurements in the Asynchronous Mode of a Power System

  • 期刊论文

  • 发表日期：

    2025年8月1日

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  • D. A. Fedotov,
  • V. I. Antonov,
  • N. A. Doni,
  • A. V. Mokeev,
  • A. V. Bychkov,
  • A. M. Dmitrenko

摘要

Abstract

One of the tests used in verifying synchronized vector-measurement devices is testing under conditions of the asynchronous mode of a power system. In the standards for vector measurements, the signals of the above tests are normalized in the form of modulated signals with separate modulation of amplitude and phase within restricted limits, due to which the signal regulated by the standards differs significantly from the signal in the real asynchronous mode. Moreover, when the electric center of oscillation approaches the location of the synchronized vector-measurement device, the signal model obtained in accordance with the standard loses the reliability of representing the asynchronous mode signal. In order to increase the relevance of the signal model to the processes in the asynchronous mode, it is proposed to use a dual-frequency asynchronous-mode signal for testing. The characteristics of the models are compared based on the concept of the vector error of the models, which estimates the difference between them as the absolute distance between their theoretical synchronization vectors. The refusal to use the concept of the full vector error for assessing the discrepancy between the models and the introduction of a new concept of model error are caused by the need to compare theoretical synchronization vectors, and not device measurements. Comparison of theoretical synchronization vectors corresponding to models from standards and dual-frequency asynchronous mode within the framework of the measure of vector error of the models shows that their difference already at the modulation coefficients provided by the standards exceeds 10%, which confirms the need to modernize existing approaches to testing synchronized vector-measurement devices.