Multilevel Circuit Topologies Based on the Switched-Capacitor Converter and Diode-Clamped Converter

Zhao, Jing; Han, Yunlong; He, Xiuyu; Tan, Cheng; Cheng, Jun; Zhao, Rongxiang

doi:10.1109/tpel.2010.2104330

Cited by 97 publications

(37 citation statements)

References 19 publications

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“…As given in Section I, the CTLB, HTLB, FCTLB, and SCTLB converters are conventional three-level Boost, hybrid three-level Boost, three-level Boost with a flying-capacitor, and three-level Boost with a switched-capacitor network, respectively. It should be noted that the SCTLB converter is one version of the multilevel Boost converters in [15][16][17][18]. Table I shows comparative results among the CTLB, HTLB, FCTLB, SCTLB, and the proposed TLB converters.…”

Section: A Comparative Analysismentioning

confidence: 99%

“…[15], [16] propose a series of multilevel boost converters based on switched-capacitor networks, which have high voltage gains and a self-balance function for capacitor voltages. In addition, the self-balance function is highly advantageous for balancing the dc link capacitor voltages of diode-clamped multilevel inverters [17], [18]. However, since no interleaved scheme is adopted, the input current ripple and the current stress of a single switch are both very large, which are great disadvantages for FC and BC systems.…”

Section: Introductionmentioning

confidence: 99%

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A New Interleaved Double-Input Three-Level Boost Converter

Chen

Hou

Sun³

et al. 2016

Journal of Power Electronics

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This paper proposes a new interleaved double-input three-level Boost (DITLB) converter, which is composed of two boost converters indirectly in series. Thus, a high voltage gain, together with a low component stress and a small input current ripple due to the interleaved control scheme, is achieved. The operating principle of the DITLB converter under the individual supplying power (ISP) and simultaneous supplying power (SSP) mode is analyzed. In addition, closed-loop control strategies composed of a voltage-current loop and a voltage-balance loop, have been researched to make the converter operate steadily and to alleviate the neutral-point imbalance issue. Experimental results verify correctness and feasibility of the proposed topology and control strategies.

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Section: A Comparative Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A New Interleaved Double-Input Three-Level Boost Converter

Chen

Hou

Sun³

et al. 2016

Journal of Power Electronics

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show abstract

“…By choosing an optimal switching sequence of these states, certain objectives can be accomplished such as: common-mode voltage reduction [18]- [20], extension of modulation index [21], fault tolerance operation [22], switching frequency reduction [20], [23] and balancing of DC link capacitor voltages [18], [24]- [27]. Voltage balancing of DC-link capacitors in NPC converters is one of the essential problems that causes the deviation of output voltages from the reference value, also damage the equipment and devices [28]- [33]. If the sinusoidal PWM algorithm is used, the control of neutral point voltage is done by injecting the appropriate zero-sequence voltage in the reference voltage [34]- [37].…”

Section: Introductionmentioning

confidence: 99%

A Survey on Space-Vector Pulse Width Modulation for Multilevel Inverters

Qamar

Wang

2017

CPSS TPEA

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Abstract-The selection of an appropriate modulation scheme plays a vital role to assure the performance of multilevel inverters. Space vector pulse width modulation (SVPWM) is more efficient among all other pulse width modulation (PWM) techniques due to its key characteristics like better DC voltage utilization, switching losses reduction and easiness in digital implementation. The conventional SVPWM scheme presents some computational complexities due to redundant switching states and large number of space vectors. This paper summarizes five different SVPWM techniques for multilevel inverters which are α-β frame, g-h frame, K-L frame, α'-β' frame and SVPWM based on imaginary coordinate system. g-h frame and K-L frame are based on 60° and 120° coordinates system respectively. To compare the result of these SVPWM schemes, the complex calculations of conventional SVP-WM are converted into simplified line voltages form. The comparison results validate all the SVPWM techniques, but the SVPWM based on imaginary coordinate is found more simple in duty ratio calculations, easier to understand and provides a better control for zero-sequence component for any level of inverter.Index Terms-g-h frame, imaginary coordinate system, K-L frame, multilevel inverters, space vector pulse width modulation (SVPWM), α'-β' frame. I. IntroductIonN OWADAYS, the extensive use of multilevel inverters in high power and high voltage applications has made it a point of attraction for the researchers because of their remarkable performance. As compared with two-level inverters, multilevel inverters have various advantages, e.g. less harmonics in output current and voltages, reduced voltage stress across switching devices, lower dv/dt, better output wave form quality and lower common mode voltages [1], [2]. The diode-clamped 3 level neutral-point clamped (NPC) topology, as shown in Fig. 1 has been the most widely used one among all multilevel inverter topologies that have been proposed in literature [3]- [5].By using an appropriate PWM technique, from discrete voltage levels, multilevel inverters generate the sinusoidal output voltages of different frequencies. Multilevel inverter's output performance depends on modulation algorithm and various PWM algorithms have been developed so far to fulfill the following objectives: less total harmonic distortion (THD), wider linear modulation range, lower switching losses and easy implementation. Among these, the two most popular PWM generation algorithms for multilevel inverters are sinusoidal carrier-based PWM (SPWM) and space vector PWM (SVPWM). In engineering applications, SPWM algorithms maintained their credibility for a long period [6]-[10] but with the development of microcontrollers, SVPWM took place due to its easy digital implementation, better harmonics performance, high DC voltage utilization ratio, reduced switching losses and convenience for capacitor voltage balancing. Moreover, the SVPWM has 15% higher linear modulation range than that of SPWM [11]. However, by increasing the number of...

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“…Three-phase bidirectional multilevel converters are recommended for high-power charger systems in spite of the added complexity of control circuitry and additional components, which can increase the total cost [12]. These converters are characterized by a high level of power quality at AC input mains with reduced total harmonic distortion (THD), higher power factor, reduced electromagnetic interference (EMI) noise, and provide a ripple-free, regulated DC output voltage insensitive to both supply and load disturbances [13][14][15][16][17][18]. Additional advantages of these converters are lower switch voltage stress and the utilization of smaller passive devices, such as capacitors and inductors [19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Electric Vehicle to Power Grid Integration Using Three-Phase Three-Level AC/DC Converter and PI-Fuzzy Controller

Sayed

Gabbar

2016

Energies

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This paper presents the control and simulation of an electric vehicle (EV) charging station using a three-level converter on the grid-side as well as on the EV-side. The charging station control schemes with three-level AC/DC power conversion and a bidirectional DC/DC charging regulator are described. The integration of EVs to the power grid provides an improvement of the grid reliability and stability. EVs are considered an asset to the smart grid to optimize effective performance economically and environmentally under various operation conditions, and more significantly to sustain the resiliency of the grid in the case of emergency conditions and disturbance events. The three-level grid side converter (GSC) can participate in the reactive power support or grid voltage control at the grid interfacing point or the common coupling point (PCC). A fuzzy logic proportional integral (FL-PI) controller is proposed to control the GSC converter. The controllers used are verified and tested by simulation to evaluate their performance using MATLAB/SIMULINK. The comparison of a PI-controller and a PI-Fuzzy controller for the EV charging station shows the effectiveness of the proposed FL-PI controller over conventional PI controller for same circuit operating conditions. A good performance for PI-Fuzzy in terms of settling time and peak overshoot can observed from the simulation results.

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Multilevel Circuit Topologies Based on the Switched-Capacitor Converter and Diode-Clamped Converter

Cited by 97 publications

References 19 publications

A New Interleaved Double-Input Three-Level Boost Converter

A New Interleaved Double-Input Three-Level Boost Converter

A Survey on Space-Vector Pulse Width Modulation for Multilevel Inverters

Electric Vehicle to Power Grid Integration Using Three-Phase Three-Level AC/DC Converter and PI-Fuzzy Controller

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