Selective Harmonic Compensation (SHC) PWM for Grid-Interfacing High-Power Converters

Zhou, Hua; Li, Yunwei; Zargari, Navid R.; Cheng, Zhongyaun; Ni, Ruoshui; Zhang, Ye

doi:10.1109/tpel.2013.2261553

Cited by 85 publications

(5 citation statements)

References 23 publications

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“…In VPDM, the current waveform depends on the number of blocks per sector, the block length, the PDM pattern, and the pulse width. All these parameters are selected to implement the pulse density curve (10) as closely as possible in each sector, and the analysis of the current waveform is not considered in this paper. However, it can be assumed that with a large enough number of blocks, sinusoidal input currents can be implemented, and the power transferred to the load is the same for both the SV-PWM and VPDM.…”

Section: A Semiconductor Voltage and Current Stressesmentioning

confidence: 99%

“…The modulation methods used in CSRs can be divided into two groups: offline and online. Among offline methods, selective harmonics elimination/selective harmonics compensation (SHE/SHC) pulse width modulation (PWM) [10][11][12][13] is often used for mediumvoltage high-power applications; this method does not require a fast dynamic response and has a low switching frequency to reduce switching losses. The sinusoidal PWM 14,15 , space vector PWM [16][17][18] , and carrier-based PWM 19,20 are online methods.…”

Section: Introductionmentioning

confidence: 99%

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Variable Pulse Density Modulation for a Buck-Type Three-Switch Current Source Rectifier

Ngo-,

Nguyen,

Nguyen-

2023

Sci. Tech. Dev. J.

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With flexible voltage adjustment without an intermediate DC/DC converter, short-circuit protection, self-starting, high reliability, and three-phase current source rectifiers (CSRs) are being widely used in high-power medium-voltage applications and low-power low-voltage applications. Modulation methods significantly affect the performance of CSRs and can be categorized into offline modulation methods, such as selective harmonic elimination/compensation pulse width modulation (SHE/SHC-PWM), and online modulation methods, such as space vector pulse width modulation (SV-PWM) and carrier-based pulse width modulation (CB-PWM). The SHE/SHC-PWM is popular in high-power medium-voltage applications that do not require a fast dynamic response and have a low switching frequency. Online modulations considerably improve the dynamic response and performance of the CSR; however, high computational power, such as digital signal processors (DSPs), is required at higher switching frequencies, leading to greater system complexity and cost. In this paper, an offline method based on variable pulse density modulation (VPDM) of power switches to synthesize sinusoidal input currents and control power transfer with pulse width modulation (PWM) is proposed. The proposed modulation is applicable to the three-switch buck-type VIENNA rectifier, showing the capability of improving the input current total harmonic distortion (THD) with respect to the SHE-PWM and is comparable to online modulations at a sufficiently high switching frequency. The simulation and experimental results basically prove the feasibility of the proposed modulation.

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Section: A Semiconductor Voltage and Current Stressesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Variable Pulse Density Modulation for a Buck-Type Three-Switch Current Source Rectifier

Ngo-,

Nguyen,

Nguyen-

2023

Sci. Tech. Dev. J.

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“…For this two-stage procedure, a relatively long time as well as high-quality hardware are required to ensure efficient performance. However, the advantage of this method is flexibility in the selection of nonactive components of supply current (considered as its higher harmonics-which is a certain limitation) for compensation [6,7].…”

Section: Measurement and Control Module (Signal Processing Module)mentioning

confidence: 99%

Is It Possible to Obtain Benefits by Reducing the Contribution of the Digital Signal Processing Techniques to the Control of the Active Power Filter?

Szromba

2021

Energies

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This paper presents a simple yet efficient control method for active power filters that can be used to improve power quality. Applying this method can open the way towards limiting the hardware and computational expenditure, which are needed for control of the active filter, while maintaining its required performance. The method is based on the indirect approach of obtaining reference signals combined with the closed-loop current control technique. Monitoring of changes of energy stored in reactance elements of the active filter is the base for obtaining reference signals for compensation. The active filter can perform classical compensation and, additionally, can perform some extra functionality for managing of active power in the system. In particular, it can stabilize the supplying source power, enable energy exchange between loads connected on DC and AC sides of the active filter, and—in a case of generating loads—enable their energy storage and redistribution amongst consuming loads. The presented method can be useful for voltage-source as current-source inverter based active filters, and for DC systems as well as for AC single- or three-phase ones.

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“…It has been demonstrated that a harmonic mitigation capability depends on a variety of factors, including grid inductance, characteristics of the transformer, structure of the system, load profiles, and topologies [8,9]. Devices such as Unified power quality conditioners (UPQC) [10], passive damping filters [11], Active Power Filters (APF) [12], Electronic Inductors (EI) [13], D-STATCOMs [14], and techniques such as selective harmonics compensation [15], Finite, and Infinite Impulse Response (FIR) and (IIR) filters [16], are among the most popular mitigation devices and techniques which have been used to suppress harmonic emissions in distribution networks. While it is essential to use effective strategies to reduce or eliminate harmonic distortions in power systems, it is more crucial to estimate these harmonics at the outset by coming up with smart, effective, and precise techniques.…”

Section: Introductionmentioning

confidence: 99%

A Comprehensive Review of Harmonic Issues and Estimation Techniques in Power System Networks Based on Traditional and Artificial Intelligence/Machine Learning

et al. 2023

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Modern industrial and commercial devices that are fed by power electronics circuits and behave non-linearly tend to produce power quality issues in power systems including harmonics and interharmonics, swell, flicker, spikes, notches, and transient instabilities. Among them, harmonic emission is the most significant challenge to be overcome by the distribution networks. Unwanted current, overheating motors and transformers, equipment failure, and circuit breaker misoperation are some of the harmonic consequences. While it is important to employ the best methods to mitigate or suppress the harmonic distortions in power systems, it is even more essential to estimate these harmonics at the outset by developing smart, efficient, and accurate techniques. Due to their capability for learning, predicting, and identifying, researchers have turned to Artificial Intelligence technologies for harmonic estimation in distribution networks. Although the power system parameters (impedance/admittance model) and many harmonic monitors are prerequisites for traditional harmonic estimation methods, by utilizing Artificial Intelligence, these requirements are minimized. In this paper, a comprehensive review of traditional and modern (smart) harmonic estimation techniques are discussed.

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Selective Harmonic Compensation (SHC) PWM for Grid-Interfacing High-Power Converters

Cited by 85 publications

References 23 publications

Variable Pulse Density Modulation for a Buck-Type Three-Switch Current Source Rectifier

Variable Pulse Density Modulation for a Buck-Type Three-Switch Current Source Rectifier

Is It Possible to Obtain Benefits by Reducing the Contribution of the Digital Signal Processing Techniques to the Control of the Active Power Filter?

A Comprehensive Review of Harmonic Issues and Estimation Techniques in Power System Networks Based on Traditional and Artificial Intelligence/Machine Learning

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