Orthogonal Components Forming of the Microprocessor-Based Protection Input Signals
The use of orthogonal components (OS) is the main direction of determining information parameters in microprocessor relay protection and automation of electric power systems. Most of the measuring devices used in modern protection and automation devices can be implemented using known operating syste...
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| Format: | Article |
| Language: | Russian |
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Belarusian National Technical University
2020-08-01
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| Series: | Известия высших учебных заведений и энергетических объединенний СНГ: Энергетика |
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| Online Access: | https://energy.bntu.by/jour/article/view/1978 |
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| author | F. A. Romaniuk V. Yu. Rumiantsev Yu. V. Rumiantsev V. S. Kachenya |
| author_facet | F. A. Romaniuk V. Yu. Rumiantsev Yu. V. Rumiantsev V. S. Kachenya |
| author_sort | F. A. Romaniuk |
| collection | DOAJ |
| description | The use of orthogonal components (OS) is the main direction of determining information parameters in microprocessor relay protection and automation of electric power systems. Most of the measuring devices used in modern protection and automation devices can be implemented using known operating systems. Digital non-recursive frequency filters based on discrete Fourier transform are used for OS selection. The main disadvantage of these filters is their low performance that exceeds the period of industrial frequency. For the construction of high-speed measuring devices, this time of establishing the true output signal is often unacceptable. The article proposes to form the equivalent signal OS in microprocessor defenses based on the values of the cosine and sine axes of the main harmonic formed using a discrete Fourier transform, by multiplying them by a correction factor, which is a function of the values of the input signal amplitude and its main harmonic. The proposed algorithm for generating OS input signals in microprocessor defenses is characterized by high performance in transient modes and has wide functionality. A block diagram of an OS equivalent signal generator has been developed, all blocks of which can be implemented according to known schemes on a microelectronic and microprocessor element base. The OS shaper model is implemented in the MatLab-Simulink dynamic modeling environment. The model functioning was checked using two types of test actions, viz. a sinusoidal signal with a frequency of 50 Hz (idealized action) and a signal close to the real secondary current of a short-circuit current transformer. As a result of the performed calculations, a significant (up to two times) in the speed of the proposed method of OS formation in comparison with the formers based on the discrete Fourier transform, frequency properties of both formers being identical. |
| format | Article |
| id | doaj-art-0bfbf2be929f46139cde578cd3bfb1d1 |
| institution | Kabale University |
| issn | 1029-7448 2414-0341 |
| language | Russian |
| publishDate | 2020-08-01 |
| publisher | Belarusian National Technical University |
| record_format | Article |
| series | Известия высших учебных заведений и энергетических объединенний СНГ: Энергетика |
| spelling | doaj-art-0bfbf2be929f46139cde578cd3bfb1d12025-02-03T05:35:39ZrusBelarusian National Technical UniversityИзвестия высших учебных заведений и энергетических объединенний СНГ: Энергетика1029-74482414-03412020-08-0163432833910.21122/1029-7448-2020-63-4-328-3391722Orthogonal Components Forming of the Microprocessor-Based Protection Input SignalsF. A. Romaniuk0V. Yu. Rumiantsev1Yu. V. Rumiantsev2V. S. Kachenya3Belarusian National Technical UniversityBelarusian National Technical UniversityBelarusian National Technical UniversityBelarusian National Technical UniversityThe use of orthogonal components (OS) is the main direction of determining information parameters in microprocessor relay protection and automation of electric power systems. Most of the measuring devices used in modern protection and automation devices can be implemented using known operating systems. Digital non-recursive frequency filters based on discrete Fourier transform are used for OS selection. The main disadvantage of these filters is their low performance that exceeds the period of industrial frequency. For the construction of high-speed measuring devices, this time of establishing the true output signal is often unacceptable. The article proposes to form the equivalent signal OS in microprocessor defenses based on the values of the cosine and sine axes of the main harmonic formed using a discrete Fourier transform, by multiplying them by a correction factor, which is a function of the values of the input signal amplitude and its main harmonic. The proposed algorithm for generating OS input signals in microprocessor defenses is characterized by high performance in transient modes and has wide functionality. A block diagram of an OS equivalent signal generator has been developed, all blocks of which can be implemented according to known schemes on a microelectronic and microprocessor element base. The OS shaper model is implemented in the MatLab-Simulink dynamic modeling environment. The model functioning was checked using two types of test actions, viz. a sinusoidal signal with a frequency of 50 Hz (idealized action) and a signal close to the real secondary current of a short-circuit current transformer. As a result of the performed calculations, a significant (up to two times) in the speed of the proposed method of OS formation in comparison with the formers based on the discrete Fourier transform, frequency properties of both formers being identical.https://energy.bntu.by/jour/article/view/1978orthogonal componentsmicroprocessor protectiondigital filtersdiscrete fourier transformmodeltest effectcomputational experimentamplitude-frequency responsecurrent transformermatlabsimulink |
| spellingShingle | F. A. Romaniuk V. Yu. Rumiantsev Yu. V. Rumiantsev V. S. Kachenya Orthogonal Components Forming of the Microprocessor-Based Protection Input Signals Известия высших учебных заведений и энергетических объединенний СНГ: Энергетика orthogonal components microprocessor protection digital filters discrete fourier transform model test effect computational experiment amplitude-frequency response current transformer matlab simulink |
| title | Orthogonal Components Forming of the Microprocessor-Based Protection Input Signals |
| title_full | Orthogonal Components Forming of the Microprocessor-Based Protection Input Signals |
| title_fullStr | Orthogonal Components Forming of the Microprocessor-Based Protection Input Signals |
| title_full_unstemmed | Orthogonal Components Forming of the Microprocessor-Based Protection Input Signals |
| title_short | Orthogonal Components Forming of the Microprocessor-Based Protection Input Signals |
| title_sort | orthogonal components forming of the microprocessor based protection input signals |
| topic | orthogonal components microprocessor protection digital filters discrete fourier transform model test effect computational experiment amplitude-frequency response current transformer matlab simulink |
| url | https://energy.bntu.by/jour/article/view/1978 |
| work_keys_str_mv | AT faromaniuk orthogonalcomponentsformingofthemicroprocessorbasedprotectioninputsignals AT vyurumiantsev orthogonalcomponentsformingofthemicroprocessorbasedprotectioninputsignals AT yuvrumiantsev orthogonalcomponentsformingofthemicroprocessorbasedprotectioninputsignals AT vskachenya orthogonalcomponentsformingofthemicroprocessorbasedprotectioninputsignals |