Frequency-domain harmonic modeling and analysis for 12-pulse series-connected rectifier under unbalanced supply voltage

Wang, Qianggang; Wu, Jiafang; Gao, Junqing; Wang, Jian; Li, Chunyan; Wang, Jiajia; Zhou, Niancheng

doi:10.1016/j.epsr.2018.04.022

Cited by 11 publications

(3 citation statements)

References 19 publications

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“…Wang et al [17] proposed a frequency-domain harmonic model for 12-pulse series-connected thyristor-controlled rectifier under unbalanced supply voltage. Wiechmann et al [18] proposed an optimized sequential control technique to improve converter's reactive power consumption presentation for copper electrowinning high-current rectifiers.…”

Section: Introductionmentioning

confidence: 99%

An Effective Harmonic Suppression Method Based on Linear Active Disturbance Rejection Control for Copper Electrowinning Rectifier

Cui

Liu

Cheng

et al. 2021

Mathematical Problems in Engineering

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Because the harmonics in the production process of copper electrowinning have an important impact on the electrical energy consumption, it is necessary to suppress the harmonics effectively. In this paper, a copper electrowinning rectifier with double inverse star circuit is selected as a study object in which a large number of harmonics mainly including the 5th, 7th, 11th, and 13th harmonics are generated and injected back into the power grid. The total harmonic distortion rate of the power grid is up to 29.19% before filtering. Therefore, a method combining the induction filtering method and the active filtering method is proposed to carry out comprehensive filtering. Simulation results demonstrate that the total harmonic distortion rate of the system decreases to 4.20%, which indicates that the proposed method can track the corresponding changes of harmonics when the load changes in real time and filter them out. In order to ensure and improve the effect of active filter, a current harmonic tracking control method based on linear active disturbance rejection control is proposed. Simulation results show that the total harmonic distortion rate decreases to 3.34%, which is also lower than that of hysteresis control. Compared with the conventional single filtering method, the new filtering method combining induction filtering with active filtering based on linear active disturbance rejection control in the copper electrowinning rectifier has obvious advantages.

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Section: Introductionmentioning

confidence: 99%

An Effective Harmonic Suppression Method Based on Linear Active Disturbance Rejection Control for Copper Electrowinning Rectifier

Cui

Liu

Cheng

et al. 2021

Mathematical Problems in Engineering

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“…When a fixed step is adopted to simulate the transient electromagnetic state, the switch action is responded only at the time of integral steps and therefore delayed, leading to a large number of non-characteristic harmonic waves [11][12][13]. Besides, switch action may also result in non-original numerical oscillation, which can generally be solved by an appropriate numerical integral method.…”

Section: Introductionmentioning

confidence: 99%

A Study of Interpolation Compensation Based Large Step Simulation of PWM Converters

Zhang

et al. 2020

Energies

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Real-time online simulation based on a real-time workshop (RTW) plays a vital role in the study and application of power electronics. However, restricted by the performance of equipment and hardware, the simulators so far available in the market mainly support simulation steps over 50 μs, while large step simulation may result in the action delay of pulse-width modulating (PWM), numerical oscillation and high-level non-characteristic harmonic distortion. In view of these problems, this paper puts forward a modeling method based on integral prediction and interpolation compensation. First of all, prediction is performed one step in advance by the implicit trapezoidal method to find out the accurate time when the triangle carrier wave intersects with the modulation wave. At the same time, a mathematic model is built for the insulated gate bipolar transistor (IGBT) to output equivalent voltage waveform according to the principle of area equivalent. Next, in MATLAB/Simulink, offline simulation is performed with the three-phase AC-DC-AC converter as the subject. By comparing the control accuracy, the content of harmonic wave and the simulation time, the simulation effects of the 50 μs fixed-step interpolation prediction model are the same as that for a 5 μs fixed-step standard model. Finally, the effectiveness and high efficiency of this algorithm are verified on a real-time simulator, marking the application of offline models on real-time simulators.

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“…7,5 ⋅ 10 −3 ] = −9,338 ⋅ 10 −10 ; 𝑑𝑑 2 = −𝑎𝑎 2 2 = 5,625 ⋅ 10 −5 ; 𝑑𝑑 3 = 0; 𝑑𝑑 4 = 0; 𝑐𝑐 0 = 𝑏𝑏 0 = 1 ⋅ 10 −7 ; 𝑐𝑐 1 = 𝑏𝑏 1 + 𝑏𝑏 𝛽𝛽 0 0 = 1,0241 ⋅ 10 −4 ; 𝑐𝑐 2 = 𝑏𝑏 2 + 𝑏𝑏 𝛽𝛽 1 0 = 0,025; 𝑐𝑐 3 = 𝑏𝑏 3 + 𝑏𝑏 𝛽𝛽 2 0 = 1,066; 𝑐𝑐4 = 𝑏𝑏 4 + 𝑏𝑏 𝛽𝛽 3 0 = 42,044; 𝑐𝑐5 = 41,003;Значення табличного інтеграла[1,16]: 292 ⋅ 10 −3 ;𝑀𝑀 5 = � � 𝑑𝑑 0 𝑑𝑑 1 𝑑𝑑 2 𝑑𝑑 3 𝑑𝑑 4 𝑐𝑐 0 𝑐𝑐 2 𝑐𝑐 4 0 0 0 𝑐𝑐 1 𝑐𝑐 3 𝑐𝑐 5 0 0 𝑐𝑐 0 𝑐𝑐 2 𝑐𝑐 4 0 0 0 𝑐𝑐 1 𝑐𝑐 3 𝑐𝑐 5 � � = 1,403 ⋅ 10 −12 .Підставивши чисельні значення, отримаємо значення I5, тобто. значення квадрата середньоквадратичної помилки:𝐼𝐼 5 = (−1) 5−1 1,403 ⋅ 10 −12 2 ⋅ 10 −7 ⋅ 4,29210 −3 = 1,634 ⋅ 10 −𝐼𝐼 5 = 1,634 ⋅ 10 −3 .Відповідно, СКП імпульсного стабілізатора з принципом управління з відхилення з астатизмом першого порядку 𝜀𝜀 = 0,049.…”

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Dynamic model of the combined pulse voltage stabilizer with second-order astatism

Turovskyi

2024

SNSUT

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This article aims to increase the productivity of power supply to telecommunications equipment in conditions of critical voltage changes. To achieve this goal, we focused on improving the second-order astatism combined pulse voltage regulator circuit used to power telecommunication equipment. A dynamic model of this stabilizer was developed. In the course of the research, the following tasks were solved: stability was analyzed, transfer functions were determined, and voltage mismatch values of the stabilizer were calculated. A dynamic model of the combined impulse voltage stabilizer with second-order astatism was created. The obtained results showed that this model provides stability and allows to increase the accuracy of the stabilizer operation, eliminating voltage inconsistencies at various changes in the input voltage. The obtained research results will allow to increase the efficiency of power supply of telecommunications equipment, ensuring stable operation during changes in input voltage and load and may be useful in solving problems in the field of telecommunications, in particular for improving the quality of radio technical devices and telecommunications equipment.

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Frequency-domain harmonic modeling and analysis for 12-pulse series-connected rectifier under unbalanced supply voltage

Cited by 11 publications

References 19 publications

An Effective Harmonic Suppression Method Based on Linear Active Disturbance Rejection Control for Copper Electrowinning Rectifier

An Effective Harmonic Suppression Method Based on Linear Active Disturbance Rejection Control for Copper Electrowinning Rectifier

A Study of Interpolation Compensation Based Large Step Simulation of PWM Converters

Dynamic model of the combined pulse voltage stabilizer with second-order astatism

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