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Journal articles on the topic 'DC-link capacitor'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Şahin, Deniz, and Bülent Dağ. "Reduction in DC-Link Capacitor Current by Phase Shifting Method for a Dual Three-Phase Voltage Source Inverters Dual Permanent Magnet Synchronous Motors System." World Electric Vehicle Journal 16, no. 1 (2025): 39. https://doi.org/10.3390/wevj16010039.

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This paper presents a carrier waves phase shifting method to reduce the dc-link capacitor current for a dual three-phase permanent magnet synchronous motor drive system. Dc-link capacitors absorb the ripple current generated at the input due to the harmonics of the pulse width modulation (PWM). The size, cost, reliability, and lifetime of the dc-link capacitor are negatively affected by this ripple current flowing through it. The proposed method is especially appropriate for common dc-link capacitors for a dual inverter system driving two PMSMs. In this paper, the input current of each inverte

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2

Qian, Zhongquan, Siyang Gong, Shuxin Xiao, Zhichen Lin, and Xinmin Li. "Online Monitoring Method for Capacitor Lifetime in Brushless DC Motor Drive Systems with DC-Link Series Switch." World Electric Vehicle Journal 16, no. 6 (2025): 330. https://doi.org/10.3390/wevj16060330.

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Brushless DC motors are often used as traction motors in electric vehicles due to their high power density and efficiency. The dc-link electrolytic capacitor is the most vulnerable part of the brushless DC motor drive system, and it determines the reliability of the motor drive system. Therefore, it is of great importance to monitor the life of the dc-link electrolytic capacitor in the drive system. To carry out the lifetime monitoring of capacitors, a dc-link series switch circuit composed of diodes and power switching devices is introduced to calculate the capacitance value. The lifetime of

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3

Suman, Satyam. "Design and Modeling of a DC-Link Capacitor Droop Controller for a PV System: A Comprehensive Review." INTERANTIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENT 08, no. 06 (2024): 1–5. http://dx.doi.org/10.55041/ijsrem36114.

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This paper presents an in-depth review of the design and modeling of a DC-link capacitor droop controller for photovoltaic (PV) systems. The DC-link capacitor droop controller plays a crucial role in stabilising the DC-link voltage, managing power fluctuations, and ensuring reliable operation of grid-connected PV systems. This review covers the fundamental principles of droop control, the architecture of PV systems, the role of DC-link capacitors, and the detailed design process of the droop controller. Additionally, we explore various control strategies, simulation methods, practical implemen

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4

Zhang, Zhigang, Pengcheng Zhang, Yang Zhang, Wenjuan Zhang, Mengdi Li, and Zichen Xiong. "Calculation of RMS Current Load on DC-Link Capacitors for Multiphase Machine Drives under Carrier-Phase Shift Control." Journal of Control Science and Engineering 2023 (April 25, 2023): 1–11. http://dx.doi.org/10.1155/2023/6909403.

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The reliability and economy of dc-link capacitors are important concerns in multiphase drive systems. Due to the parallel connection of several converters, the dc-link capacitors are subjected to a higher RMS current, and the root mean square (RMS) current of dc-link capacitors is an important reference standard to determine its lifetime, cost, and volume. In this paper, the RMS current of dc-link capacitor is calculated by using the dual Fourier integral method and the effect of carrier interleave is studied. Meanwhile, the modulation ratio, harmonic sidebands, and switching frequency are als

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5

Al-Wesabi, Ibrahim, Zhijian Fang, Zhiguo Wei, and Hanlin Dong. "Direct Sliding Mode Control for Dynamic Instabilities in DC-Link Voltage of Standalone Photovoltaic Systems with a Small Capacitor." Electronics 11, no. 1 (2022): 133. http://dx.doi.org/10.3390/electronics11010133.

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Large electrolytic capacitors used in grid-connected and stand-alone photovoltaic (PV) applications for power decoupling purposes are unreliable because of their short lifetime. Film capacitors can be used instead of electrolytic capacitors if the energy storage requirement of the power conditioning units (PCUs) is reduced, since they offer better reliability and have a longer lifetime. Film capacitors have a lower capacitance than electrolytic capacitors, causing enormous frequency ripples on the DC-link voltage and affecting the standalone photovoltaic system’s dynamic performance. This rese

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6

Zhong, Li Ping, Qi Min Gu, and Shui Ping Zhang. "Capacitor Voltage Balance Control for Diode Clamped Multi-Level Inverter Based on Charge Refreshing." Advanced Materials Research 945-949 (June 2014): 2885–90. http://dx.doi.org/10.4028/www.scientific.net/amr.945-949.2885.

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Unbalance of dc-link capacitor voltage is an key technical problem of multi-level inverter, this paper presents a novel method to solve it. According to the the new approach, a balancing capacitor is in turn connected in parallel with each dc-link capacitor in a sampling time, exacting charges from the capacitors with higher voltage and putting them into the capacitors with lower voltage.Thus the charges of all dc-link capacitors are refreshed constantly and the voltages can be kept balanced on the whole. This method only needs to add a simple hardware circuit and will not increase the complex

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7

Munwar, Ayaz Memon, Mustafa Bhutto Ghullam, and Ali Buriro Ehsan. "Sizing of dc-link capacitor for a grid connected solar photovoltaic inverter." Indian Journal of Science and Technology 13, no. 22 (2020): 2272–81. https://doi.org/10.17485/IJST/v13i22.406.

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Abstract <strong>Objective:</strong> To determine the optimum size of a dc-link capacitor for a grid connected photovoltaic inverter. <strong>Methods:</strong> Dc-link capacitors are considered as one of the sensitive parts of the grid connected photovoltaic systems and needs effort to design a reliable and optimal size capacitor as its reliability is concerned with the overall system reliability. The double line frequency power flows between the input and outside of a Φ grid connected PV system which produces voltage ripples at the capacitor and dc link. This voltage ripple

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8

Chen, Wei, Jialong Wu, Xinmin Li, and Chen Li. "Overvoltage Avoidance Control Strategy for Braking Process of Brushless DC Motor Drives with Small DC-Link Capacitance." Actuators 13, no. 5 (2024): 185. http://dx.doi.org/10.3390/act13050185.

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Single-phase input rectifier brushless DC motor drives with a small film capacitor have many advantages, such as high power density and high reliability. However, when the motor system operates in regenerative braking mode, the dc-link capacitor with reduced capacitance may suffer from overvoltage without adding additional hardware circuits. At the same time, the braking torque control of the motor will be affected by speed variations. In order to ensure smooth and reliable operation of the motor system, an anti-overvoltage braking torque control method is proposed in this article. The relatio

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9

Zhang, Guohao, Hua Li, Haobo Li, Jing Lan, Qin Zhang, and Fuchang Lin. "Large-capacity AC superimposed DC power supply for the degradation evaluation of DC-link capacitors." Review of Scientific Instruments 94, no. 4 (2023): 044709. http://dx.doi.org/10.1063/5.0138117.

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The DC-link capacitor, whose operating voltage is a periodic irregular waveform, is a key device in the converter. A large-capacity DC/AC superimposed experimental power supply above 100 kVA is an important piece of equipment that must be used in the aging research of DC-link capacitors. The irregular periodic operating voltage of the DC support capacitor is equivalent in the form of DC voltage superimposed with multiple harmonics based on the Fast Fourier transform analysis. The power supply is mainly divided into four parts: an AC module, a DC module, a protection module, and an isolation co

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10

Zhou, Xuanyi, Wei Juin Choy, Abraham M. Alcaide, et al. "Common DC-Link Capacitor Harmonic Current Minimization for Cascaded Converters by Optimized Phase-Shift Modulation." Energies 16, no. 5 (2023): 2098. http://dx.doi.org/10.3390/en16052098.

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This paper investigates the influence of a constant carrier phase shift on the DC-link capacitor harmonic current of cascaded converters used in fuel-cell and mild-hybrid electric vehicles. In these applications, a DC-DC converter can be adopted between the battery and the motor drive inverter in a cascaded structure, where the two converters share the same DC-link. Since the DC-link capacitor of such a system represents a critical component, the optimization of the converter operation to limit the current stress and extend the lifetime of the capacitor is an primary objective. This paper prop

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11

Wook-Jin Lee and Seung-Ki Sul. "DC-Link Voltage Stabilization for Reduced DC-Link Capacitor Inverter." IEEE Transactions on Industry Applications 50, no. 1 (2014): 404–14. http://dx.doi.org/10.1109/tia.2013.2268733.

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12

Ramasamy, Palanisamy, Vijayakumar Krishnasamy, Mohamed Ali Jagabar Sathik, Ziad M. Ali, and Shady H. E. Abdel Aleem. "Three-Dimensional Space Vector Modulation Strategy for Capacitor Balancing in Split Inductor Neutral-Point Clamped Multilevel Inverters." Journal of Circuits, Systems and Computers 27, no. 14 (2018): 1850232. http://dx.doi.org/10.1142/s0218126618502328.

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Capacitor imbalance is one of the major drawbacks of a neutral-point clamped multilevel inverter (NPC-MLI). The capacitor imbalance rises due to the nonuniform switching, nonideal DC link capacitors, improper commutation, and various asymmetrical phase currents in switching states. The imbalance can be minimized by using proper switching using a redundancy switching method and avoiding the usage of medium vectors. The computational cost of this system is to be decided by the level of the inverter system. This paper presents a comprehensive three-dimensional space vector modulation (3D-SVM) str

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13

Carrillo-Santos, Luis Mauricio, Mario Ponce-Silva, Leobardo Hernández-González, Gabriel Calzada-Lara, Yesenia Reyes-Severiano, and Oswaldo Ulises Juarez-Sandoval. "Minimization of the Decoupling Circuit (DC-Link) in Induction Motors." Applied Sciences 13, no. 6 (2023): 3674. http://dx.doi.org/10.3390/app13063674.

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There is currently a growing interest in replacing the internal combustion engine with electric motors in transportation applications. However, there are different problems related to electric motors for this application. One of them is the oversizing of the energy decoupling system since to ensure that the decoupling capacitor can store the power fluctuations, the capacitance required by the system is usually oversized. This leads to preference for the use of capacitors with construction technologies that have a lower lifetime than the remaining elements of the propulsion system, directly aff

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14

Li, Xinmin, He Yuan, Wei Chen, Lihong Yu, and Xin Gu. "Commutation Torque Ripple Reduction Strategy of Brushless DC Motor Drives Based on Boosting Voltage of DC-Link Small Capacitor." Micromachines 13, no. 2 (2022): 226. http://dx.doi.org/10.3390/mi13020226.

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Based on the brushless DC motor system with DC-link small capacitance powered by a single-phase AC power source, a boosting DC-link voltage strategy to reduce the commutation torque ripple of brushless DC motors is proposed in this paper. The control strategy utilizes the special topology of the motor system to boost the DC-link capacitor voltage in a specific zone during the non-commutation period. During the commutation period, the high voltage of the DC-link capacitor is released to meet the voltage requirement of the brushless DC motor during commutation. In order to reduce the commutation

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15

Rodríguez-Benítez, Omar, Mario Ponce-Silva, Juan Antonio Aqui-Tapia, Óscar Miguel Rodríguez-Benítez, Ricardo Eliú Lozoya-Ponce, and Heriberto Adamas-Pérez. "Active Power-Decoupling Methods for Photovoltaic-Connected Applications: An Overview." Processes 11, no. 6 (2023): 1808. http://dx.doi.org/10.3390/pr11061808.

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This study compares ripple port, stacked switched capacitor, and capacitive energy storage architectures for active power decoupling, comparing the number of components, performance, energy density, DC-link capacitor reduction, efficiency, and frequency operation to highlight their main benefits and drawbacks for single-phase grid-connected applications. The overview reveals equivalent effective energy density without electrolytic capacitors, as well as enhanced simplicity, performance, and durability, thereby providing stacked switched capacitors as an attractive power-decoupling alternative

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16

Abronzini, Umberto, Ciro Attaianese, Matilde D’Arpino, Mauro Di Monaco, and Giuseppe Tomasso. "Induction Motor Drives Fed by an NPC Inverter with Unbalanced DC-Link." Electronics 8, no. 12 (2019): 1379. http://dx.doi.org/10.3390/electronics8121379.

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Neutral Point Clamped (NPC) converters with n levels are traditionally controlled in such a way that the DC-link capacitors operate at 1/( n - 1) of the total DC-link voltage level. The voltage level across the DC-link capacitors has to be properly regulated by the capacitor unbalance control to contain the harmonic distortion of the converter output voltages. State-of-the-art modulation techniques address the problem of the DC-link voltage regulation for NPC inverters. However, they highly show reduced performance when unbalanced DC-link voltages are considered. In this paper, a novel Space V

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17

Saranya, T. L., G. Ezhilarasan, and Subhransu Sekhar Dash. "Mitigation of Power Quality Problems Using DSTATCOM with Reduced DC Link Voltage." Advanced Materials Research 768 (September 2013): 301–7. http://dx.doi.org/10.4028/www.scientific.net/amr.768.301.

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This paper mainly presents the DSTATCOM (Distribution Static Compensator) and its control methodology of DC capacitor voltage. Generally, the dc capacitor voltage is regulated using a PI controller where various control algorithms are used for load compensation. Whenever there is a change in load there is considerable variation in dc capacitor voltage which might affect compensation. In this work, a supervisory method is proposed to reduce the dc link rating. The reduction in dc link voltage leads to the reduction in switching frequency and hence switching losses A considerable reduction in th

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18

Stala, Robert, Jakub Hachlowski, and Adam Penczek. "NPC Seven-Level Single-Phase Inverter with DC-Link Voltage Balancing, Input Voltage Boosting, and AC Power Decoupling." Energies 15, no. 10 (2022): 3729. http://dx.doi.org/10.3390/en15103729.

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This paper presents a novel concept of the DC-AC system with the input voltage boost ability, seven-level output voltage modulation, and the input AC current reduction at the double frequency of the output voltage. The system integrates the NPC full-bridge inverter which is composed of four-level legs and an active input voltage balancer (AIVB). The DC-link is composed of three capacitors connected in a series. The source of the energy is connected directly to the middle capacitor while the upper and lower capacitors of the DC-link are charged by the AIVB. The operation of the AIVB leads to ba

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19

Amer, Sanaa M. I., and Mona N. Eskander. "Effect of DC Link Capacitor on the Performance of Wind-Driven Double-Fed Induction Generator." WSEAS TRANSACTIONS ON POWER SYSTEMS 19 (March 12, 2024): 44–53. http://dx.doi.org/10.37394/232016.2024.19.6.

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In this paper, the starting performance of a double-fed induction generator (DFIG) operating at super-synchronous speed is investigated when varying the values of the DC link capacitor. The starting transients, the settling time, and the harmonics of the stator and rotor currents and voltages are investigated as a function of the DC link capacitor Cd. Curve fitting is applied to derive mathematical equations (polynomial) relating the variation of the stator current THD with the value of the DC capacitor. Similarly, polynomials are deduced to relate the THD of the rotor current and rotor voltag

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20

Tcai, Anatolii, Ibrahim Mohd Alsofyani, In-Yong Seo, and Kyo-Beum Lee. "DC-link Ripple Reduction in a DPWM-Based Two-Level VSI." Energies 11, no. 11 (2018): 3008. http://dx.doi.org/10.3390/en11113008.

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This paper proposes a new method to reduce the ripple current of the DC-link capacitor in a two-level voltage source inverter (VSI), with a discontinuous pulse-width modulation (DPWM). In real applications, a capacitor block is very bulky, due to the parallel connection of several capacitors that share the value of the ripple current. Hence, it contributes significantly to the volume and weight of the whole system. Conventional DPWM is used to minimize the amount of switching for the power transistors, therefore, reducing stress and power loss. This leads to increased efficiency and reliabilit

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21

Liao, Yi-Hung, and Yen-Lun Lin. "An Improved Down-Scale Evaluation System for Capacitors Utilized in High-Power Three-Phase Inverters under Balanced and Unbalanced Load Conditions." Energies 15, no. 19 (2022): 6937. http://dx.doi.org/10.3390/en15196937.

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The DC-link capacitors in an electronic power system are the main constraint of the power density and lifespan of the power converters. Evaluating the load life of capacitors working in severely adverse circumstances plays an important role in the design stages of the next-generation power converters. In this article, an improved evaluation system for the capacitors utilized in high-power three-phase voltage source inverters is proposed. The purpose of this article is to reproduce the same encountered stresses when a DC-link capacitor is used in a high-power inverter with pulse-width modulatio

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22

Thin, Zar, Kai Suan Tial Mai, and Lin Naing Tun. "DC-link voltage balancing and control of qZ-source inverter fed induction motor drive." International Journal of Electrical and Computer Engineering (IJECE) 13, no. 4 (2023): 3733–46. https://doi.org/10.11591/ijece.v13i4.pp3733-3746.

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Poor performance of the motor drive system is caused when the direct currentlink (DC-link) capacitor voltages of the inverter are not sufficiently generated. This is mainly because of the various load torque changes and input voltage fluctuation. The qZ-source inverter operates with a fully shoot-through technique. This technique causes mismatching between the upper and lower DC-link capacitor voltages. Without capacitor voltage-balancing function, the desired DC-link capacitor voltages could not be provided or maintained when there are load and speed changes. A Sawtooth carrier-based simple b

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23

Kang, Kyoung-Pil, Younghoon Cho, Ho-Sung Kim, and Ju-won Baek. "DC-Link Capacitor Voltage Imbalance Compensation Method Based Injecting Harmonic Voltage for Cascaded Multi-Module Neutral Point Clamped Inverter." Electronics 8, no. 2 (2019): 155. http://dx.doi.org/10.3390/electronics8020155.

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In a three-level (NPC) converter, the voltage imbalance problem in the DC-link capacitors is major issue. This paper proposes the DC-link capacitor voltage imbalance compensation method, where a common offset voltage is injected for a multi-module NPC inverter. The offset voltage consists of a harmonic voltage and a voltage difference between the upper and lower capacitors. The proposed method does not require any hardware modification, so that it is easily implemented. In order to show the effectiveness of the proposed balancing method, theoretical analysis is provided to balance the voltages

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Baburajan, Silpa, Haoran Wang, Dinesh Kumar, Qian Wang, and Frede Blaabjerg. "DC-Link Current Harmonic Mitigation via Phase-Shifting of Carrier Waves in Paralleled Inverter Systems." Energies 14, no. 14 (2021): 4229. http://dx.doi.org/10.3390/en14144229.

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DC-connected parallel inverter systems are gaining popularity in industrial applications. However, such parallel systems generate excess current ripple (harmonics) at the DC-link due to harmonic interactions between the inverters in addition to the harmonics from the PWM switching. These DC-link harmonics cause the failure of fragile components such as DC-link capacitors. This paper proposes an interleaving scheme to minimize the current harmonics induced in the DC-link of such a system. First, the optimal phase-shift angle for the carrier signal is investigated using the analytical equations,

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CHIKHA, Said, Zakaria LAMMOUCHI, Kamel BARA, and Nadhir MESBAHI. "Deadbeat predictive control of three-level NPC inverter using in the photovoltaic chain conversion system." Electrotehnica, Electronica, Automatica 73, no. 2 (2025): 23–34. https://doi.org/10.46904/eea.25.73.2.1108003.

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This paper aims to improve the performance of the Deadbeat (DB) predictive controller for a three-level neutral point clamped (NPC) inverter used in a photovoltaic energy conversion system (PVECS). The chain comprises a Buck-Boost power converter used as maximum power point tracking (MPPT) based on perturb and observe algorithm P&O controller providing robust tracking property against environment changes variations. Then, a three-level NPC stage for a PV-grid-connected system is used. A Deadbeat (DB) predictive controller is used to transfer solar energy to the grid side. The switching sta

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Zar, Thin, Mai Kai Suan Tial, and Tun Lin Naing. "DC-link voltage balancing and control of qZ-source inverter fed induction motor drive." International Journal of Electrical and Computer Engineering (IJECE) 13, no. 4 (2023): 3733. http://dx.doi.org/10.11591/ijece.v13i4.pp3733-3746.

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<span lang="EN-US">Poor performance of the motor drive system is caused when the direct current-link (DC-link) capacitor voltages of the inverter are not sufficiently generated. This is mainly because of the various load torque changes and input voltage fluctuation. The qZ-source inverter operates with a fully shoot-through technique. This technique causes mismatching between the upper and lower DC-link capacitor voltages. Without capacitor voltage-balancing function, the desired DC-link capacitor voltages could not be provided or maintained when there are load and speed changes. A Sawto

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Sal y Rosas, Damián, and Alvaro Zarate. "Single-Phase Grid-Forming Strategy with Power Decoupling Implementation for Electrolytic-Capacitor-Free EV Smart Battery Charger." Energies 16, no. 2 (2023): 894. http://dx.doi.org/10.3390/en16020894.

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Smart Battery Chargers (SBCs) implementing grid-forming (GFM) control strategies are a promising solution to provide voltage and frequency support, increasing the grid reliability. Typically, GFM studies consider inverters with high DC-link capacitance. Therefore, there is a research gap in two-stage DC-AC converters with small DC-link capacitance implementing GFM strategies. This article proposes a novel approach to implement a GFM control strategy along with active power decoupling (APD) in an isolated, single-phase, electrolytic-capacitor-free two-stage DC-AC structure. The structure is com

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Ramírez, Roberto O., Carlos R. Baier, Felipe Villarroel, Eduardo Espinosa, Mauricio Arevalo, and Jose R. Espinoza. "Reduction of DC Capacitor Size in Three-Phase Input/Single-Phase Output Power Cells of Multi-Cell Converters through Resonant and Predictive Control: A Characterization of Its Impact on the Operating Region." Mathematics 11, no. 14 (2023): 3038. http://dx.doi.org/10.3390/math11143038.

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Cascaded H-bridge drives require using a significant-size capacitor on each cell to deal with the oscillatory power generated by the H-bridge inverter in the DC-link. This results in a bulky cell with reduced reliability due to the circulating second harmonic current through the DC-link capacitors. In this article, a control strategy based on a finite control set model predictive control and a proportional-resonant controller is proposed to compensate for the oscillatory power required by the H-bridge inverter through the cell’s input rectifier. With the proposed strategy, a DC-link second har

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Zhang, Bo Tao, and Dong Wang. "A Research on the DC-Link Current and Capacitance of the Static Excitation Regulator on a 12/3-Phase Dual Stator-Winding Induction Generator." Applied Mechanics and Materials 214 (November 2012): 154–60. http://dx.doi.org/10.4028/www.scientific.net/amm.214.154.

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By proper simplifications, the static excitation regulator on the 12/3 phase dual stator winding induction generator is described by the switch-function model. On this basis, the switch-function expression of the DC-link capacitor current is obtained and the physical meanings are discussed, and the detailed exchange procedures between the generator and capacitor are analyzed. Considering the voltage endurance capability of the capacitor and IGBT, and the current endurance capability of the capacitor, the limitation capacitance equation of the DC-link capacitor is proposed.

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Kang, Kyoung-Pil, Younghoon Cho, Myung-Hyo Ryu, and Ju-Won Baek. "A Harmonic Voltage Injection Based DC-Link Imbalance Compensation Technique for Single-Phase Three-Level Neutral-Point-Clamped (NPC) Inverters." Energies 11, no. 7 (2018): 1886. http://dx.doi.org/10.3390/en11071886.

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In three-level neutral-point-clamped (NPC) inverters, the voltage imbalance problem between the upper and lower dc-link capacitors is one of the major concerns. This paper proposed a dc-link capacitor voltage balancing method where a common offset voltage was injected. The offset voltage consists of harmonic components and a voltage difference between the upper and the lower capacitors. Here, both the second-order harmonics and the half-wave of the second-order component were injected to compensate for the unbalanced voltage between the capacitors. In order to show the effectiveness of the pro

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Abo-Khalil, Ahmed G., Abdel-Rahman Al-Qawasmi, Ali M. Eltamaly, and B. G. Yu. "Condition Monitoring of DC-Link Electrolytic Capacitors in PWM Power Converters Using OBL Method." Sustainability 12, no. 9 (2020): 3719. http://dx.doi.org/10.3390/su12093719.

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Since the lifespan of an electrolytic capacitor is relatively short compared to other power semiconductor devices, the failure rate accounts for 60% and, thus, it is the most vulnerable component of the power conversion device. Therefore, the accurate measurement of the lifetime of an electrolytic capacitor is very important in ensuring the reliability of the entire system, including the capacitor. In this paper, an online failure detection method for a DC-link electrolytic capacitor in a back-to-back Pulse width Modulation (PWM) converter using the opposition-based learning particle swarm opt

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Dybko, Maksim, Sergey Brovanov, and Aleksey Udovichenko. "DC-Link Capacitance Estimation for Energy Storage with Active Power Filter Based on 2-Level or 3-Level Inverter Topologies." Electricity 6, no. 1 (2025): 13. https://doi.org/10.3390/electricity6010013.

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Energy storage systems (ESSs) and active power filters (APFs) are key power electronic technologies for FACTS (Flexible AC Transmission Lines). Battery energy storage has a structure similar to a shunt active power filter, i.e., a storage element and a voltage source inverter (VSI) connected to the grid using a PWM filter and/or transformer. This similarity allows for the design of an ESS with the ability to operate as a shunt APF. One of the key milestones in ESS or APF development is the DC-link design. The proper choice of the capacitance of the DC-link capacitors and their equivalent resis

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Amaral, Acácio M. R., Khaled Laadjal, and Antonio J. Marques Cardoso. "Advanced Fault-Detection Technique for DC-Link Aluminum Electrolytic Capacitors Based on a Random Forest Classifier." Electronics 12, no. 12 (2023): 2572. http://dx.doi.org/10.3390/electronics12122572.

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In recent years, significant technological advances have emerged in renewable power generation systems (RPGS), making them more economical and competitive. On the other hand, for the RPGS to achieve the highest level of performance possible, it is important to ensure the healthy operation of their main building blocks. Power electronic converters (PEC), which are one of the main building blocks of RPGS, have some vulnerable components, such as capacitors, which are responsible for more than a quarter of the failures in these converters. Therefore, it is of paramount importance that the design

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DeMarcos, Ander, Endika Robles, Unai Ugalde, Inigo Martinez de Alegria, and Jon Andreu. "Interleaving Modulation Schemes in Asymmetrical Dual Three-Phase Machines for the DC-Link Stress Reduction." Machines 11, no. 2 (2023): 267. http://dx.doi.org/10.3390/machines11020267.

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The DC-Link capacitor plays a crucial role as far as power density and reliability are concerned: it occupies approximately 40% of the inverter, and causes approximately 30% of its failures. Asymmetrical dual three-phase (ADTP) multiphase arrangements are gaining relevance in the automotive sector for powertrain applications. This work focuses on reducing the impact that the widely used double zero sequence injection (DZSI) family of PWM techniques have on such a bulky and failure-prone component in an ADTP arrangement by means of interleaving techniques. By using the double Fourier integral f

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Li, Shan, Lei Yang, and Tao Wang. "Analysis of the DC-Link Voltage Ripple for the Three-Phase Voltage Source Converter under Nonlinear Output Current." Energies 15, no. 8 (2022): 2892. http://dx.doi.org/10.3390/en15082892.

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The dc-link voltage ripple plays an important role in dc capacitor design for three-phase voltage source converters (VSCs). However, the analytical models of the dc-link voltage ripple have rarely been reported for VSCs with nonlinear output current. This paper first derived the LOH voltages expressions in the dc-link. It reveals that each LOH component in ac current would induce two dc-link LOH voltages. Then the switching frequency harmonic voltages (SHVs) and their envelope expressions are formulated. Moreover, the proposed analytical models could be very much simplified when applied to spe

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Ma, Qingxuan, Qingyun Huang, Felice Makain, Alex Q. Huang, and Michael A. de Rooij. "Multi-Path Precharge for GaN Flying-Capacitor-Multi-Level Totem-Pole PFC." Electronics 14, no. 13 (2025): 2637. https://doi.org/10.3390/electronics14132637.

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GaN flying-capacitor-multi-level (FCML) Totem-Pole power-factor-correctors (PFCs) have been demonstrated with very high density and efficiency in the literature. However, there is still a lack of detailed discussion about flying capacitor voltage precharge during the start-up for GaN FCML Totem-Pole PFCs. To enhance the reliability during start-up, we propose a multi-path and multi-step flying capacitor precharge method. In our proposed method, the bulky DC link capacitor is precharged through the path of the auxiliary line-frequency Si diode half-bridge and the body-diodes of the Si MOSFET ha

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Abo-Khalil, Ahmed G., Saeed Alyami, Ayman Alhejji, and Ahmed B. Awan. "Real-Time Reliability Monitoring of DC-Link Capacitors in Back-to-Back Converters." Energies 12, no. 12 (2019): 2369. http://dx.doi.org/10.3390/en12122369.

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Electrolytic capacitors have large capacity, low price, and fast charge/discharge characteristics. Therefore, they are widely used in various power conversion devices. These electrolytic capacitors are mainly used for temporary storage and voltage stabilization of DC energy and have recently been used in the renewable energy field for linking AC/DC voltage and buffering charge/discharge energy. However, electrolytic capacitors continue to be disadvantageous in their reliability due to their structural weaknesses due to the use of electrolytes and very thin oxide and dielectric materials. Most

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Bellapukonda Sravani, B Kavyasanthoshi and D Ravi Kishore. "PQ Theory Based Power Quality Improvement in Distribution Level with D-STATCOM." International Journal for Modern Trends in Science and Technology 7, no. 05 (2021): 199–205. http://dx.doi.org/10.46501/ijmtst0705034.

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The Transient response of the distribution static compensator (DSTATCOM) is very important while compensating rapidly varying unbalanced and nonlinear loads. Any change in the load affects the dc link voltage directly. The sudden removal of load would result in an increase in the dc link voltage above the reference value where as a sudden increase in the load would reduce the dc link voltage below its reference value. The proper operation of DSTATCOM requires variation of the DC link voltage within the prescribed limits. Conventionally, a proportional-integral (PI) controller is used to mainta

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Saberi, Hossein, Hamidreza Nazaripouya, and Shahab Mehraeen. "Implementation of a Stable Solar-Powered Microgrid Testbed for Remote Applications." Sustainability 13, no. 5 (2021): 2707. http://dx.doi.org/10.3390/su13052707.

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An intrinsically stable microgrid, operated by inverter-interfaced distributed energy resources (I-DERs) is introduced in this paper. The microgrid is built upon a systematic design method, which is adapted from the operation of the synchronous machine (SM). The proposed method analogizes the dynamics of the dc-link in I-DERs to the rotor dynamics in synchronous generators (SGs) and utilizes the capacitor as energy storage. Thus, the proposed mechanism relaxes battery usage for frequency control, and by using the capacitive stored energy, provides a high fault ride-through capability, which is

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Nie, Zipan, and Nigel Schofield. "Multi‐phase VSI DC‐link capacitor considerations." IET Electric Power Applications 13, no. 11 (2019): 1804–11. http://dx.doi.org/10.1049/iet-epa.2019.0062.

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Siton, Yarden, Vladimir Yuhimenko, Dmitry Baimel, and Alon Kuperman. "Baseline for Split DC Link Design in Three-Phase Three-Level Converters Operating with Unity Power Factor Based on Low-Frequency Partial Voltage Oscillations." Machines 10, no. 9 (2022): 722. http://dx.doi.org/10.3390/machines10090722.

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The study sets a baseline for split DC link capacitance values and voltage set points in three-phase three-level AC/DC (or DC/AC) converters operating with unity power factor. In order to equalize the average values of partial DC link voltages, the controller generates a zero-sequence containing DC components only while employing neither dedicated DC link capacitance balancing hardware nor high-order zero-sequence component injection. Such a baseline is required in order to evaluate the effectiveness of different DC link capacitance reduction methods proposed in the literature. Unlike most pre

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Dang, Hoanglong, Hyejin Park, Sangshin Kwak, and Seungdeog Choi. "DC-Link Electrolytic Capacitors Monitoring Techniques Based on Advanced Learning Intelligence Techniques for Three-Phase Inverters." Machines 10, no. 12 (2022): 1174. http://dx.doi.org/10.3390/machines10121174.

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The reliability of the electronic converter is a vital concern in an industrialized area. Capacitors are critical in electronic converters and are more likely to fail than other electronic gears. Due to aging, the capacitor progressively loses its original quality and capacitance, and the equivalent series resistance escalates. Hence, condition monitoring is a fundamental procedure for evaluating capacitor health that affords prognostic repairs to guarantee stability in power networks. The ESR and capacitance of the capacitor are commonly employed to estimate the condition grade. This study pr

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Kavitha, Pasumalaithevan, and Bhaskaran Umamaheswari. "R Dump Converter without DC Link Capacitor for an 8/6 SRM: Experimental Investigation." Scientific World Journal 2015 (2015): 1–13. http://dx.doi.org/10.1155/2015/393629.

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The objective of this paper is to investigate the performance of 8/6 switched reluctance motor (SRM) when excited with sinusoidal voltage. The conventional R dump converter provides DC excitation with the help of capacitor. In this paper the converter used is the modified R dump converter without DC link capacitor providing AC or sinusoidal excitation. Torque ripple and speed ripple are investigated based on hysteresis current control. Constant and sinusoidal current references are considered for comparison in both DC and AC excitation. Extensive theoretical and experimental investigations are

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Alizadeh Bidgoli, M., and S. Honarbari. "Advanced Vector Controller for a Four-Switch Three-Phase Rectifier under Unbalanced Grid Voltage." International Transactions on Electrical Energy Systems 2022 (December 17, 2022): 1–12. http://dx.doi.org/10.1155/2022/4401054.

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One of the main challenges of a four-switch three-phase rectifier (FSTPR) is a DC imbalance in capacitor voltages. On the other hand, under unbalanced grid voltage conditions, unbalanced three-phase input current and the DC-link voltage affect the performance of the FSTPR. Although many papers focus on designing a controller to balance DC-link capacitor voltage, a few papers are available to cope with the imbalance of DC-link capacitor voltages and input current simultaneously under unbalanced grid voltage. In this paper, first, the operation of the FSTPR under unbalanced grid voltage conditio

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Cheng, Hong, Daokuan Yang, Cong Wang, and Changgeng Tian. "An SVPWM Algorithm for a Novel Multilevel Rectifier with DC-Side Capacitor Voltage Balance." Electronics 12, no. 7 (2023): 1637. http://dx.doi.org/10.3390/electronics12071637.

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The recently proposed novel unidirectional multilevel rectifier, a three single-phase star-connected multilevel rectifier, has the characteristic of having a large number of DC-side capacitors and a complex capacitor voltage balancing control structure under conventional carrier-based phase-shift sine wave pulse-width modulation (SPWM). Hence, a space vector pulse-width modulation (SVPWM) algorithm for the novel multilevel rectifier is proposed in this paper, which can quickly balance the capacitor voltage without an additional voltage balancing control structure. Firstly, it divides the space

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Szczesniak. "Challenges and Design Requirements for Industrial Applications of AC/AC Power Converters without DC-Link." Energies 12, no. 8 (2019): 1581. http://dx.doi.org/10.3390/en12081581.

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AC/AC converters that do not have a DC energy storage element, such as a matrix chopper and a matrix converter, are increasingly becoming alternatives to conventional two-stage AC/DC/AC converters and thyristor choppers. In such systems, the main DC-link capacitor does not exist, so the system provides more reliable operation and makes it possible to reduce the financial costs of its construction. It should be noted that AC/AC converters without an energy storage element in a form of DC-link capacitors have not been implemented on an industrial scale. The reasons involve technical aspects and

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Hachlowski, Jakub, and Robert Stala. "Novel Converter for Voltage Balance in Series-Connected Capacitors and Batteries." Power Electronics and Drives 3, no. 1 (2018): 65–74. http://dx.doi.org/10.2478/pead-2018-0011.

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Abstract This paper presents a novel concept of a circuit for voltage balance of three series-connected capacitors or batteries, as well as the research results. The problem is related to the control of voltage sharing on series capacitors, supercapacitors or battery banks in energy storage systems or direct current (DC)-link of four-level neutral-point-clamped inverters. The proposed circuit is a switched-capacitor (SC) resonant converter composed of a single capacitor and seven transistor switches. Control of the converter makes it possible to transfer energy between any capacitors, by switc

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Bon-Gwan Gu and Kwanghee Nam. "A DC-link capacitor minimization method through direct capacitor current control." IEEE Transactions on Industry Applications 42, no. 2 (2006): 573–81. http://dx.doi.org/10.1109/tia.2006.870036.

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Do, Jin-Ho, Ye-Chan Kim, and Seung-Ho Song. "Periodic Power Fluctuation Smoothing Control Using Blade Inertia and DC-Link Capacitor in Variable-Speed Wind Turbine." Energies 18, no. 14 (2025): 3763. https://doi.org/10.3390/en18143763.

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Due to the structural aspects of the wind turbine, such as wind shear and tower shadow effects, the output power of the wind turbine has periodic fluctuations, known as 3P fluctuations. These fluctuations can reduce overall power generation and deteriorate power quality. In this context, this paper proposes a power smoothing control method that utilizes rotor inertia and a DC-link capacitor as small-scale energy storage devices. First, the typical energy storage capacities of the rotor’s rotational kinetic energy and the DC-link capacitor’s electrostatic energy are analyzed to assess their smo

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P., Prem, Jagabar Sathik M., Alagusabai Andril, and Karthick KN. "An I-Network Switched Capacitor Multilevel Inverter (INSC-MLI) Topology with Reduced Switch Count and its SV-PWM based control algorithm." Sustainable Engineering Science and Research Journal 01, no. 02 (2022): 20–31. https://doi.org/10.5281/zenodo.7368550.

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A new multilevel inverter topology which can synthesize seven levels in the voltage waveform with a voltage boost of 150% is presented in this paper. The topology is named as I- network switched capacitor multilevel inverter (INSC-MLI), since the switched capacitor network employed in the topology resembles the alphabet “I”. The topology has two dc link capacitors, two floating capacitors and nine IGBT switches. The maximum blocking voltage across each of the switch employed in the inverter is less than or equal to the input dc voltage. Further the reduced switch count aids in redu

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