ORTHOGONAL COMPONENTS OF THE THREE-PHASE CURRENT AT ASYMMETRICAL ACTIVE - REACTIVE LOAD IN 4-WIRE CIRCUIT

• Main Author: Sirotin, Iu. A.
• Format: Article
• Language: English; Russian
• Published: National Technical University "Kharkiv Polytechnic Institute" and State Institution “Institute of Technical Problems of Magnetism of the National Academy of Sciences of Ukraine” 2016
• Subjects: three-phase circuit; active and reactive power; power shift; power equation; unbalanced current and mode; active-reactive asymmetrical load; asymmetrical voltage; currents' physical components (CPC); 621.31; трехфазная цепь; активная и реактивная мощность; мощность сдвига; уравнение мощности; несбалансированный ток и режим; активно–реактивная несимметричная нагрузка; несимметричное напряжение; Currents’ Physical Components (CPC); трифазне коло; активна і реактивна потужність; потужність зсуву; рівняння потужності; незбалансований струм та режим; активно-реактивне несиметричне навантаження; Currents’ Physical Components (CPC).
• Online Access: http://eie.khpi.edu.ua/article/view/2074-272X.2016.3.10

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.