Dynamic and Steady State Response Analysis of Selective Harmonic Elimination in High Power Inverters

Cheng, Jingling; Xu, Tingting; Chen, Dongdong; Chen, Guozhu

doi:10.1109/access.2021.3082770

Cited by 19 publications

(6 citation statements)

References 42 publications

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“…It is known that six-step control is the best option for the DC link voltage. Currently, for most AFEs as part of an SMD, PWM with selected harmonic elimination (SHE) is used to provide the best quality of converted voltage under the low semiconductor module's switching frequency [11][12][13][14][15]. Along with good electromagnetic compatibility, PWM with SHE facilitates the use of the DC link voltage at the six-step modulation level (K PWM ≈ 2/π) [16][17][18].…”

Section: Eafe Egmentioning

confidence: 99%

Control over Grid Reactive Power by Using a Powerful Regenerative Controlled-Speed Synchronous Motor Drive

Maklakov

Nikolaev

Lisovskaya

2023

Designs

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The authors propose a technique for reactive power compensation using a powerful regenerative controlled-speed synchronous motor drive (SMD) based on a three-level (3L) neutral point clamped (NPC) active front-end rectifier (AFE) and a voltage source inverter (VSI). The review of technical solutions for reactive power compensation showed that the limitations on the transmitted reactive power in the system under consideration still have not been studied. The paper provides a mathematical description and proposes synthesis-friendly block diagrams of the mathematical 3L-NPC-AFE-VSI and SMD models. The developed models allow defining the instantaneous values of the total 3L-NPC-AFE power consumed from the grid depending on the SMD load diagram. It is noted that the 3L-NPC-AFE-VSI-SMD system is designed without considering the opportunities for reactive power generation. It was determined that the limit value of reactive power generated by a 3L-NPC-AFE depends on the DC link voltage, the grid current consumption and the modulation index. The possibility of reactive power compensation by the SMD system through a 3L-NPC-AFE was experimentally tested on the main drive of a metal plate hot rolling mill. The analysis of the results obtained showed that during the breakdown, an SMD can generate reactive power equal to 16% of the total rated power using a 3L-NPC-AFE at a rated DC link voltage and without overcurrent. It was shown that generating reactive power is expedient in low-load SMD operation modes or at idle. Research in this area is promising due to the widespread use of high-power SMD based on a 3L-NPC-AFE-VSI and the tightening of requirements for energy saving and efficiency and supply voltage quality. The proposed reactive power control technique can be used as part of an industrial smart grid.

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Section: Eafe Egmentioning

confidence: 99%

Control over Grid Reactive Power by Using a Powerful Regenerative Controlled-Speed Synchronous Motor Drive

Maklakov

Nikolaev

Lisovskaya

2023

Designs

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“…Figure 2 shows the SHE PPWM switching angles calculated for a quarter-wave symmetry of the unipolar 3L voltage waveform within the modulation factor variation range from 0 to 4/π (solutions were limited to 1.15) at a pitch of 0.01: (a) no. 1 to αD; choosing initial conditions from Table 1; choosing the maximum number of iterations itermax = 125; choosing inertial weight ωmin = 0.2 and ωmax = 0.7; choosing weight coefficients c1 = 1.5 and c2 = 1.5; choosing search space boundaries to conduct random initialization of the position vector for each swarm particle from xmin = 0 to xmax = π/2; choosing the initial speed of each particle randomly from vmin = π/10 to vmax = −π/10; choosing the modulation factor m from 0 to 1.15 at a pitch of 0.01;…”

Section: Mathematical Description Of the 3l Unipolar Voltage And The ...mentioning

confidence: 99%

“…The main harmonic of the converter-consumed current can be controlled by both changing the semiconductor module switching times and a phase shift between the source and the converter voltages. This technique is called Programmed Pulse Pattern PWM (PPWM) [1].…”

Section: Introductionmentioning

confidence: 99%

Study of Behavior of Voltage and Current Spectra of Three-Level Neutral Point Clamped Converter at Selected Harmonic Elimination Programmed Pulse Pattern Pulse-Width Modulation

Maklakov

Ердаков

2023

Energies

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The issue of converted voltage distortion by high-power converters at pulse-width modulation (PWM) with a low switching frequency of semiconductor modules is still relevant. Currently, the Programmed Pulse Pattern PWM (PPWM) technique is used extensively that allows pre-eliminating the selected harmonics from the converter’s voltage and current spectrum or reducing them to meet the voltage quality standard requirements. A review of scientific publications has shown the insufficiency of available studies on defining and estimating the impact of powerful converters with PPWM. The problem of defining the amplitudes of higher harmonics generated by a converter with PPWM, which are the main cause of electronic equipment failures at the common grid connection point, is particularly relevant. This study considers the behavior of the NPC converter voltage and current spectra at PPWM with the selected harmonic elimination (SHE) for three-level (3L) voltage waveforms. The behavior of up to the 50th non-eliminated harmonics in the NPC converter voltage and current spectra is first shown for a modulation factor changing within 0–1.15 at the pitch of 0.01 for six different SHE PPWM: no. 1–5 and 7; no. 2–5, 7, 11, and 13; no. 3–5, 7, 11, 13, 17, and 19; no. 4–5, 7, 11, 13, 17, 19, 23, and 25; no. 5–5, 7, 11, 13, 17, 19, 23, 25; 29, and 31; no. 6–5, 7, 11, 13, 17, 19, 23, 25, 29, 31, 35, and 37. The concept proposed herein allows measuring the current consumed amplitudes of NPC converter with SHE PPWM at the low average error of about 6%. The adequacy of the approach used herein to determine the current harmonic amplitudes has been experimentally verified with laboratory equipment. The results are consistent with engineering accuracy. The research work is promising for further study and estimation of the impact of the NPC converter SHE PPWM for more complex multi-pulse grid connection circuits and resonance phenomena.

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“…To maximize the advantages of a modular cascaded energy storage system, a suitable modulation technique must be designed. Pulse Width Modulation (PWM) technology has been extensively studied and various methods have been developed, such as Nearest Level Modulation (NLM) [1][2][3][4], Selected Harmonic Elimination PWM (SHEPWM) [5][6], Space Vector PWM (SVPWM) [7][8] and multi-carrier PWM [9][10]. SHEPWM is suitable for low switching frequency applications, but calculation of the switching angle is difficult due to the large number of levels.…”

Section: Introductionmentioning

confidence: 99%

Novel Hybrid Modulation Method for Modular Multilevel Converter Based Energy Storage System

2023

Self Cite

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This paper focuses on introducing a modular cascaded battery energy storage system and establishing a mathematical model for both the AC and DC sides of the energy storage system. Based on this, a corresponding control strategy is proposed. To achieve a specific trade-off between switching times and output harmonics, a new hybrid modulation strategy (NHPWM) is proposed that combines the characteristics of NLM and CPS-PWM commonly used in traditional modular cascaded topologies. With this hybrid modulation strategy, the modulation of each sub-module can be flexibly configured, allowing the system to coordinate device loss and output harmonic characteristics in real time according to system requirements. Additionally, this paper proposes a calculation method based on the theory of double Fourier series expansion to derive the analytical solution of the NHPWM harmonic distribution, providing a theoretical basis for submodule modulation mode configuration. Finally, the correctness and effectiveness of the modulation strategy and theoretical calculation were verified by simulation and experiment. The proposed method in this paper has demonstrated clear advantages over traditional HPWM and CPS-PWM in terms of harmonics and efficiency, as shown by the experimental results.INDEX TERMS modular multilevel converter (MMC), novel hybrid PWM modulation (NHPWM), nearest level modulation (NLM), carrier phase-shift PWM (CPS-PWM)

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Dynamic and Steady State Response Analysis of Selective Harmonic Elimination in High Power Inverters

Cited by 19 publications

References 42 publications

Control over Grid Reactive Power by Using a Powerful Regenerative Controlled-Speed Synchronous Motor Drive

Control over Grid Reactive Power by Using a Powerful Regenerative Controlled-Speed Synchronous Motor Drive

Study of Behavior of Voltage and Current Spectra of Three-Level Neutral Point Clamped Converter at Selected Harmonic Elimination Programmed Pulse Pattern Pulse-Width Modulation

Novel Hybrid Modulation Method for Modular Multilevel Converter Based Energy Storage System

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