DC-Link Capacitor-Current Ripple Reduction in DPWM-Based Back-to-Back Converters

Tcai, Anatolii; Shin, Hye-Ung; Lee, Kyo‐Beum

doi:10.1109/tie.2017.2745453

Cited by 43 publications

(14 citation statements)

References 20 publications

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“…To overcome the above challenges, several studies have investigated ways to reduce the DC-link ripple current. In [15], [16], a novel pulse width modulation (PWM) algorithm was proposed to reduce the DC-link ripple current of the back-to-back converter. Other studies have investigated DC-link ripple current reduction using two-level VSIs or modular multi-level converters connected in parallel [17], [18].…”

Section: Introductionmentioning

confidence: 99%

Optimized Space-Vector Modulation to Reduce Neutral Point Current for Extending Capacitor Lifetime in Three-Level Inverters

Kim

Lee

2020

IEEE Access

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In this paper, an optimized space-vector modulation (SVM) to reduce DC-link ripple current in three-level inverters is presented. Various types of capacitors can be utilized to balance the voltage in the DC-link of voltage source inverters. Electrolytic capacitors are widely used owing to their large capacitance per volume. However, electrolytic capacitors have a short lifespan because the allowable ripple current is low. A conventional SVM that is focused on improving harmonic characteristics. Therefore, it cannot balance the DC-link ripple current properly because using some voltage vectors increases the DC-link ripple current. To overcome this limitation and extend the lifespan of the capacitors, an optimized SVM is proposed to reduce the DC-link ripple current. The proposed modulation scheme synthesizes the reference voltage by choosing voltage vectors that cause smaller increases in the DC-link ripple current, avoiding those that cause larger increases. The effectiveness of the proposed optimized SVM is verified by simulations and experimental results. INDEX TERMS Three-level inverter, dc-link ripple current, capacitor, space-vector modulation, reliability. SEOK-MIN KIM (Graduate Student Member, IEEE) received the B.S. degree in electronic engineering from Sejong University, Seoul, South Korea, in 2013, and the M.S. degree in space survey information technology and the Ph.D. degree in electrical and computer engineering from

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Section: Introductionmentioning

confidence: 99%

Optimized Space-Vector Modulation to Reduce Neutral Point Current for Extending Capacitor Lifetime in Three-Level Inverters

Kim

Lee

2020

IEEE Access

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“…The CB-DPWM method leads the switching devices operation in only two of three legs. The discontinuous modulation section without switching can be set up to 120 degrees of the fundamental period of the reference voltage in three-leg inverter [27][28][29][30][31][32][33][34][35][36][37]. However, the PWM methods introduced in many papers related to FLI are typical continuous modulation schemes in which all switching devices always operates.…”

Section: Introductionmentioning

confidence: 99%

Carrier-Based Discontinuous PWM Method for Five-Leg Inverter

Lee

Ryu

2020

IEEE Access

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This paper proposes a rotation carrier-based discontinuous pulse width modulation (CB-DPWM) method for the five-leg inverter (FLI). The FLI based on two-level topology consists of 10 switching devices for driving dual motors. Therefore, two switching devices can be reduced to compare the configuration using two three-leg inverters for driving dual motors. The proposed pulse width modulation (PWM) method is based on the reference signals which are used in existing carrier-based continuous pulse width modulation (CB-CPWM) method for FLI. In the proposed rotation CB-DPWM method, one of fiveleg is periodically clamped to Vdc/2 or-Vdc/2 by adding the offset voltage to the reference voltages of the existing CB-CPWM method. The five reference voltages for all legs are considered to calculate the offset voltage of the proposed rotation CB-DPWM method. Consequently, since the proposed rotation CB-DPWM method has the fewer number of switching than that of the existing CB-CPWM, the switching loss can be reduced and it results in the efficiency improvement. Simulation and experimental results confirm the effectiveness and feasibility of the proposed method. INDEX TERMS Five-leg inverter (FLI), Modulation, rotation Carrier-based discontinuous pulse width modulation (CB-DPWM), Dual-motor driving system

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“…Furthermore, an LCL filter for reducing the output of current ripples and a three-phase grid were connected to the PCS. The BTB converter consists of a generator-side inverter and grid-side converter [13][14][15][16] using two-level topologies [17,18] that share a DC-link. In HTGS, electrical energy is generated by the PMSG, when high-pressure fluids rotate the hydraulic turbine.…”

Section: Introductionmentioning

confidence: 99%

Hardware-Simulator Development and Implementation for Hydraulic Turbine Generation Systems in a District Heating System

et al. 2020

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This paper presents not only a hardware-simulator development for hydraulic turbine generation systems (HTGS) in a district heating system (DHS) but also its control strategies and sequence. Generally, a DHS uses a differential pressure control valve (DPCV) to supply high-pressure–high-temperature fluids for customers depending on distance. However, long-term exposure of the DPCV to fluids increases the probability of cavitation and leads to heat loss in an event of cavitation. Therefore, a HTGS was introduced to solve this problem. It performs differential pressure control of the fluids, replaces the DPCV, and converts excess energy wasted by the DPCV to electrical energy. In this paper, the development of a hardware-simulator for HTGSs with a back-to-back converter, which uses two-level topologies, is proposed; moreover, control strategies and sequence used in this design are presented. The performance and validity of the proposed hardware-simulator and its control strategies are demonstrated by experimental results.

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DC-Link Capacitor-Current Ripple Reduction in DPWM-Based Back-to-Back Converters

Cited by 43 publications

References 20 publications

Optimized Space-Vector Modulation to Reduce Neutral Point Current for Extending Capacitor Lifetime in Three-Level Inverters

Optimized Space-Vector Modulation to Reduce Neutral Point Current for Extending Capacitor Lifetime in Three-Level Inverters

Carrier-Based Discontinuous PWM Method for Five-Leg Inverter

Hardware-Simulator Development and Implementation for Hydraulic Turbine Generation Systems in a District Heating System

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