Equivalent circuit model containing AC and DC side harmonics of rectifier circuits

Harmonic load modeling: a case study of 33 kV Abuja Steel Mill Feeder

“…In order to carry out a comprehensive harmonic modeling and simulation of the Abuja Steel feeder, two categories of literatures were identified and reviewed so as to establish the gaps and come up with a more reliable result. The first group centres on harmonics modeling using traditional method otherwise called the ideal current source models [9]- [16]. Khaled, et al [9] and Ali [10] deployed the use of idealized models.…”

“…Similarly, DigSilent/Power factory is the simulation software used in Ma et al [13] to evaluate the future levels of harmonic distortion in a power grid based on the present harmonic current source model developed from measured data. The second group of literature review proposed the use of equivalent circuit models to represent characteristic harmonic producing loads [14]- [16]. The Norton/ Thevenin equivalent circuit provides a reliable model for harmonic current and voltage sources in a distribution network.…”

“…Evolutionary algorithm have been tested and verified in the estimation of Thevenin/ Norton equivalent circuit parameters without knowing the network impedance [15]. An equivalent circuit that considered the modeling of the harmonic current emission on the AC side of a diode bridge rectifier while evaluating the harmonic voltage contribution of the DC side of the rectifier was successfully developed [16]. The drawback of modeling only the harmonic current was successfully addressed for a more accurate harmonic analysis.…”

Kontrolsüz Bir Redresörle Beslenen Üç Fazlı Bir Güç Kablosunda Amper Kapasitesinin Azalması ve Güç Kablosu Güç Kaybının Alt Değerinin Bulunması

“…A matrix solution for their modeling is presented in the frequency domain in [21]. An equivalent circuit for a diode bridge that makes use of AC and DC side rectifier harmonics is given in [22]. The uncontrolled rectifiers draw non-sinusoidal currents and their current profile varies by the load power [16][17][18][19][20][21][22] and this can cause overheating in the power cables.…”

“…An equivalent circuit for a diode bridge that makes use of AC and DC side rectifier harmonics is given in [22]. The uncontrolled rectifiers draw non-sinusoidal currents and their current profile varies by the load power [16][17][18][19][20][21][22] and this can cause overheating in the power cables. In this study, a lower bound for the power loss of a three-phase power cable feeding a three-phase uncontrolled rectifier is given to find out whether the loss stays the same for the same amount of transferred power to the load and whether the loss stays within the standards such as the international electrotechnical commission IEC 60287 standard [12].…”