Alexandru BITOLEANU, Mihaela POPESCU, Vlad SURU
Rezumat
Lucrarea sugereaza doua noi definitii ale puterii aparente pe baza teoriei p-q (teoria puterii aparente complexa
instantanee). Astfel, se pun in evidenta componentele puterii neutile si relatia de cuadratura existenta intre puterile aparenta,
activa, reactiva si deformanta. Multe studii de caz arata ca exista o corespondenta intre relatiile propuse si cele exsistente in
literatura. Astfel, daca tensiunea este sinusoidala, relatiile propuse conduc la valori egale ale puterii aparente, ca si relatiile
propuse de Bucholtz si Czarnecki. In conditii de tensiune nesinusoidala, prima relatie propusa conduce la valori mai mari. A doua relatie conduce, intotdeauna, la aceleasi valori ale puterii aparente ca si relatiile propuse de Bucholtz si Czarnecki. Semnificativ este ca relatia recomandata de IEEE (The IEEE Standard Dictionary of Electrical and Electronics Terms, 6th), conduce la rezultate eronate daca sarcina este dezechilibrata si se aduc noi argumente in acest sens
Cuvinte cheie: Puterea aparenta complexa instantaneeputere aparentaputere deformantafactor de putere
Abstract
This paper suggests a new two definitions of apparent power based on the instantaneous p-q power theory. The
component corresponding to the non-useful power and the quadratic relationship between apparent, active, reactive and nonuseful
powers are also highlighted. A lot of case-studies draw a parallel between the results according to the well-known
definitions gathered from previous literature and the results based on the new expression. It is shown that, under sinusoidal
and balanced conditions, all definitions of the apparent power lead to the same results. However, in the case of sinusoidal
unbalanced situations, the results based on the new definition are identical only with those corresponding to Buchholz’s and
Czarnecki’s definitions. In contrast, under non-sinusoidal conditions, one of the suggested definitions leads to higher values of the apparent power. The second suggested definition leads to the same results as relations proposed by Bucholtz and
Czarnecki, for all analyzed cases. It stressed that the relation recommended by IEEE (IEEE Standard Dictionary of the
Electrical and Electronics Terms, 6th), leads to erroneous results if the load is unbalanced and new arguments are brought in
this regard.
Keywords: Instantaneous Complex Apparent PowerApparent PowerDistortion PowerPower Factor
Din același număr
- NEW APPROACH ON THE STUDY OF THE STEADY-STATE AND TRANSIENT REGIMES OF THREE-PHASE INDUCTION MACHINE
- STUDY ON SYNCHRONOUS GENERATOR WITH SMOOTH AIR GAP
- PERMANENT MAGNET TRANSVERSE FLUX MOTOR (PMTFM) FOR A SHIP PROPULSION DRIVE SYSTEM
- PERMANENT MAGNET SYNCHRONOUS MACHINES WITH HALBACH ARRAY CONFIGURATIONS – A F.E.M. APPROACH
- NOVEL CORE DESIGN FOR IMPROVING PERFORMANCE OF THE INDUCTION MACHINES
- EXTERNAL ROTOR SHAPE ESTIMATION OF AN INDUCTION MOTOR BY FEM ANALYSIS
- PSYCHOLOGICAL TECHNIQUES OF CREATION APPLIED TO IDENTIFY NEW SOLUTIONS FOR COOLING A SLIDING CONTACT
- CONTRIBUTIONS TO DETERMINATION OF THE MATRIX EQUATIONS AND OF THE DEPHASING MATRICE, IN CASE OF CHANGES THAT MAY OCCUR IN THE WIRING DIAGRAM OF THE TRANSFORMERS
- COMPARATIVE STUDY BETWEEN THE EQUIVALENT SCHEME OF A TYPICAL TRANSFORMER AND THE SCHEME OF A TRANSFORMER WITH MOBILE COIL
- CONSIDERATIONS ON THE USE OF FLUX 2D SOFTWARE FOR THE ANALYSIS OF THE DEFECTS IN POWER TRANSFORMERS
- P M TUBULAR LINEAR SYNCHRONOUS GENERATOR FOR WAVE ENERGY CONVERSION
- CONTRIBUTION TO THE DEVELOPMENT OF ELECTROMECHANICAL ACTUATORS AND ELECTROCHEMICAL LIQUID MICROPUMPS