Modeling of Interconnected Voltage and Current Controlled Converters With Coupled LC–LCL Filters

Ma, Ke; Tang, Weiyu; Cheng, Ran; Song, Yubo

doi:10.1109/tpel.2020.3023911

Cited by 17 publications

(12 citation statements)

References 47 publications

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“…Wang and Blaabjerg [57] illustrate the details about modeling and stability analysis of coupled converters. Ma et al [58] give a detailed investigation into the modeling and stability analysis of two converters coupled by different filters.…”

Section: B Stability and Robustness To Faulted Cutmentioning

confidence: 99%

“…Besides, the implementation of LC/LCL filters introduces neutral point into the emulation system, which makes the emulation of unsymmetrical conditions easier. However, the implementation of LC/LCL filters may bring unexpected system resonance and control coupling [58]. Fig.…”

Section: B Control Coupling and Stabilitymentioning

confidence: 99%

“…11(a) shows a typical three-phase interconnected converter system, where a voltage-controlled converter with LC filters is connected to a current-controlled converter with LCL filters. Ma et al [58] analyze the mechanism of unexpected system resonance and control coupling in this system. Fig.…”

Section: B Control Coupling and Stabilitymentioning

confidence: 99%

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Power-Electronics-Based Mission Profile Emulation and Test for Electric Machine Drive System—Concepts, Features, and Challenges

Xia

et al. 2022

IEEE Trans. Power Electron.

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In the last decade, significant progress has been made in electrification, especially in the applications of electrical vehicles, renewable energies, and industry automations, which imposed much more complicated working conditions to electric machines as well as the drive converters. More advanced features, such as the control strategies, functionality, stability, and reliability of machine drive systems, need to be characterized and validated. Thus, there is an emerging need to accurately recreate the behaviors of electric machine drive systems from more aspects for comprehensive tests. This article aims to foster and investigate the mission profile emulation technologies for the testing of electric machine drive systems. The key factors of the system to be emulated are first clarified, and then different testing concepts are summarized and compared, including dynamometer test, controller hardwarein-the-loop simulation, power hardware-in-the-loop simulation, and power-electronics-based emulation. The features of powerelectronics-based emulation, which is considered as a promising trend, will be further discussed with respect to the degrees of coupling with the drive converter, electric machine models, and control structures. Finally, challenges in the field of mission profile emulation for electric machine drive systems are discussed.

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Section: B Stability and Robustness To Faulted Cutmentioning

confidence: 99%

Section: B Control Coupling and Stabilitymentioning

confidence: 99%

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Power-Electronics-Based Mission Profile Emulation and Test for Electric Machine Drive System—Concepts, Features, and Challenges

Xia

et al. 2022

IEEE Trans. Power Electron.

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“…Then a method of calculating a filter (L-C) of the 180˚ control inverter operating in MV based on that of the filter (LC) of the SPWM control inverter is adopted, after verifying the applicability of the formulas of articles [4] [5] [6]. This is to reformulate the filter calculation method (L-C) of articles so that it can be used for a 180˚ control inverter connected to the MV network.…”

Section: System Model and Problem Formulationmentioning

confidence: 99%

“…Formulas of inductance L and capacitor C According to articles [4] [5] [6], the calculation of L and C of the filter (L-C) for a three-phase inverter with SPWM control is done as follows:…”

Section: Filter (L-c)mentioning

confidence: 99%

Sizing of a Filter (L-C) for a 180&#176; Control Inverter Connected to a Medium Voltage Network

Koffi¹,

Gondo²,

Gbegbe³

et al. 2021

OJAppS

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This paper studies the design and sizing of a filter (L-C) for an inverter with 180˚ control in Medium voltage (MV), based on formulas of the capacitance of the capacitor C and the inductance L of the filter (L-C) of an SPWM inverter. These formulas were obtained by minimizing two parameters: the reactive power of the capacitor (capped at 5% of the apparent power of the load) and the ripple of the current flowing through inductance L (capped at 10% of the current supplying the load). The application of these formulas for the calculation of the filter (L-C) of the 180˚ control inverter in MV is not conclusive. Studies have been carried out to make them applicable. The results show that limiting the current ripple in the inductor to 10% of the load current is a valid assumption and that limiting the reactive power of the capacitor to 5% of the apparent power of the load presents shortcomings. The results also show that setting the inductance L of the filter to L maxi and the capacitor C from 35 × C maxi to 400 × C maxi gives voltage and current THDs that meet the 519 IEEE-2014 standards.

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Grid‐tied PEMFC power conditioning system based on capacitor voltage thorough feedback procedure in a weak and harmonics‐polluted network

Hosseinpour,

Sabetfar,

Shahparasti

2023

Energy Science & Engineering

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Proton exchange membrane fuel cells (PEMFC) have been noticed by researchers due to their high efficiency, low pollution, and high‐power density in distributed generation systems. In this paper, an LCL‐type grid‐tied PEMFC fuel cell power conditioning system is evaluated in a harmonics‐polluted low‐voltage grid. The LCL‐filters can lead to resonance and instability despite their capability to attenuate harmonics. In this research, a transformer has been used to connect the fuel cell inverter to the grid. The grid‐side inductor of LCL‐filter is realized by the leakage inductance of the transformer. In addition, for more effective resonance damping and attenuation of current ripples caused by the grid voltage harmonics, a capacitor voltage comprehensive feedback control has been designed and investigated. The comprehensive feedback control of the capacitor voltage contains proportional, first and second‐order derivative terms. In the proposed control scheme, the capacitor‐current‐feedback is opposed by the capacitor voltage derivative term due to reverse loop gain, which leads to deleting both of these loop gains. As a result, there is no need to utilize a current sensor in this control method. Consequently, the proportional and second‐order derivative terms of the capacitor voltage attenuate the LCL‐filter resonance. A low‐pass filter is also considered in the second‐order derivative loop in the controllable frequency range to ensure system stability. The simulation results of the PEMFC power conditioning system in different conditions confirm the proper attenuation of LCL resonance of grid‐tied inverter, high‐quality current injection to the harmonics polluted grid, the suitable stability, and the appropriate dynamic response for the proposed system. Under the proposed control scheme, the fuel cell power conditioning system demonstrates satisfactory stability. Even when reducing the LCL filter values by 5%–20%, the system maintains its stability effectively. Moreover, the THD of the injected current into the grid, employing the proposed control strategy, has been successfully reduced to an impressive value of 1.97% in a weak and harmonical grid.

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Modeling of Interconnected Voltage and Current Controlled Converters With Coupled LC–LCL Filters

Cited by 17 publications

References 47 publications

Power-Electronics-Based Mission Profile Emulation and Test for Electric Machine Drive System—Concepts, Features, and Challenges

Power-Electronics-Based Mission Profile Emulation and Test for Electric Machine Drive System—Concepts, Features, and Challenges

Sizing of a Filter (<i>L-C</i>) for a 180&#176; Control Inverter Connected to a Medium Voltage Network

Grid‐tied PEMFC power conditioning system based on capacitor voltage thorough feedback procedure in a weak and harmonics‐polluted network

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Modeling of Interconnected Voltage and Current Controlled Converters With Coupled LC–LCL Filters

Cited by 17 publications

References 47 publications

Power-Electronics-Based Mission Profile Emulation and Test for Electric Machine Drive System—Concepts, Features, and Challenges

Power-Electronics-Based Mission Profile Emulation and Test for Electric Machine Drive System—Concepts, Features, and Challenges

Sizing of a Filter (&lt;i&gt;L-C&lt;/i&gt;) for a 180&amp;#176; Control Inverter Connected to a Medium Voltage Network

Grid‐tied PEMFC power conditioning system based on capacitor voltage thorough feedback procedure in a weak and harmonics‐polluted network

Contact Info

Product

Resources

About

Sizing of a Filter (<i>L-C</i>) for a 180° Control Inverter Connected to a Medium Voltage Network