Ортогональные составляющие трехфазного тока при ассиметричной активно-реактивной нагрузке в четырехпроводной цепи
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2010
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НТУ "ХПИ"
Анотація
Для 3– фазной схемы электроснабжения рассмотрен синусоидальный несимметричный режим. При несимметричном напряжении и ассиметричной активно–реактивной нагрузке для 4– проводной сети получено ортогональное разложение трехфазного тока. Четыре составляющие разложения классифицированы активностью/реактивностью и симметрией/асимметрией нагрузки и имеют однозначный электроэнергетический смысл. Для 4– проводной цепи с несимметричной нагрузкой при несимметричном напряжении полученное уравнение мощности развивает теорию токовых физических составляющих (Currents’ Physical Components – CPC).
Purpose. For the unbalanced sinusoidal mode with asymmetric voltage in 3-phase 4-wire circuits to receive the orthogonal 4- component decomposition of 3-phase current, are classified symmetry/asymmetry of active and reactive load elements separately. Methodology. The methodology is based on the vector approach, which with one voice allows to analyze the energy characteristics of a 4-wire and 3-wire circuits as balanced and unbalanced modes. At asymmetrical voltage the matrix representation methodology of the equivalent conductivities is used. Results. For 3-phase 4-wire network with a sinusoidal unbalanced mode with asymmetric voltage obtained 4-component orthogonal decomposition of the 3-phase current. The components have a clear electro-energetic sense and are classified irrespective by the load condition. Originality. The resulting decomposition current develops the theory Currents' Physical Components (CPC) for 4-wire circuit with asymmetric voltage. For the first time the unbalanced current is classified by activity and reactivity of asymmetry load elements. Practical value. Practical value of the obtained orthogonal decomposition current and the power equation is a possibility of their utilization for the increase both quality of delivery and quality of consumption of electrical energy
Purpose. For the unbalanced sinusoidal mode with asymmetric voltage in 3-phase 4-wire circuits to receive the orthogonal 4- component decomposition of 3-phase current, are classified symmetry/asymmetry of active and reactive load elements separately. Methodology. The methodology is based on the vector approach, which with one voice allows to analyze the energy characteristics of a 4-wire and 3-wire circuits as balanced and unbalanced modes. At asymmetrical voltage the matrix representation methodology of the equivalent conductivities is used. Results. For 3-phase 4-wire network with a sinusoidal unbalanced mode with asymmetric voltage obtained 4-component orthogonal decomposition of the 3-phase current. The components have a clear electro-energetic sense and are classified irrespective by the load condition. Originality. The resulting decomposition current develops the theory Currents' Physical Components (CPC) for 4-wire circuit with asymmetric voltage. For the first time the unbalanced current is classified by activity and reactivity of asymmetry load elements. Practical value. Practical value of the obtained orthogonal decomposition current and the power equation is a possibility of their utilization for the increase both quality of delivery and quality of consumption of electrical energy
Опис
Ключові слова
трехфазная цепь, мощность, электроэнергия, несимметричное напряжение, three-phase circuit, power equation, asymmetrical voltage, currents' physical components (CPC)
Бібліографічний опис
Сиротин Ю. А. Ортогональные составляющие трехфазного тока при ассиметричной активно-реактивной нагрузке в четырехпроводной цепи / Ю. А. Сиротин // Електротехніка і Електромеханіка = Electrical engineering & Electromechanics. – 2016. – № 3. – С. 62-66.