Neutral-Point Potential Balancing of Three-Level Inverters in Direct-Driven Wind Energy Conversion System

Xia, Changliang; Gu, Xin; Shi, Tingna; Yan, Yan

doi:10.1109/tec.2010.2060487

Cited by 125 publications

(56 citation statements)

References 21 publications

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“…(1) Add extra hardware circuitry to balance the NPP [16,17], by controlling the change rate of the charging and discharging currents of the upper and lower capacitors. The control method, depending on the hardware circuitry, will increase system costs, and become more complicated.…”

Section: Introductionmentioning

confidence: 99%

A Hybrid Modulation Strategy with Reduced Switching Losses and Neutral Point Potential Balance for Three-Level NPC Inverter

Jiang¹,

Gao²,

Wang³

et al. 2017

Journal of Electrical Engineering and Technology

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-In this paper, carrier-based pulse width modulation (CBPWM), space vector PWM (SVPWM) and reduced switching losses PWM (RSLPWM) for the three-level neutral point clamped (NPC) inverter are introduced. In the case of the neutral point (NP) potential (NPP) offset, an asymmetric disposition PWM (ASPDPWM) strategy is proposed, which can output PWM sequences correctly and suppress the lower order harmonics of the inverter effectively. An NPP balance strategy based on carrier based PWM (CBPWM) is analyzed. A hybrid modulation strategy combining RSLPWM and the NPP balance based on CBPWM is proposed, and hysteresis control is adopted to switch between the two modulation strategies. An experimental prototype of the three-level NPC inverter is built. The effectiveness of the hybrid modulation is verified with a resistance-inductance load and a permanent magnetic synchronous motor (PMSM) load, respectively. The experimental results show that reduced switching losses and an acceptable NPP can be effectively achieved in the hybrid modulation strategy.

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Section: Introductionmentioning

confidence: 99%

A Hybrid Modulation Strategy with Reduced Switching Losses and Neutral Point Potential Balance for Three-Level NPC Inverter

Jiang¹,

Gao²,

Wang³

et al. 2017

Journal of Electrical Engineering and Technology

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show abstract

“…The system structure of a conventional three-level Boost converter (CTLB) combined with a three-level diode-clamped inverter has been proposed to achieve a high medium voltage and a high power. In addition, a small input current ripple and a neutral-point voltage control can be achieved [11]- [13]. However, the step-up capacity of the systems is limited due to the CTLB converter, which is only 1/(1-D).…”

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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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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“…Over the past three years, a two-stage multilevel energy conversion system with a novel control method has been developed for wind power generation systems, which output medium-voltage levels [4]- [7]. As shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

An Interleaved Five-level Boost Converter with Voltage-Balance Control

Chen

Hou

Deng³

et al. 2016

Journal of Power Electronics

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This paper proposes an interleaved five-level boost converter based on a switched-capacitor network. The operating principle of the converter under the CCM mode is analyzed. A high voltage gain, low component stress, small input current ripple, and self-balancing function for the capacitor voltages in the switched-capacitor networks are achieved. In addition, a three-loop control strategy including an outer voltage loop, an inner current loop and a voltage-balance loop has been researched to achieve good performances and voltage-balance effect. An experimental study has been done to verify the correctness and feasibility of the proposed converter and control strategy.

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Neutral-Point Potential Balancing of Three-Level Inverters in Direct-Driven Wind Energy Conversion System

Cited by 125 publications

References 21 publications

A Hybrid Modulation Strategy with Reduced Switching Losses and Neutral Point Potential Balance for Three-Level NPC Inverter

A Hybrid Modulation Strategy with Reduced Switching Losses and Neutral Point Potential Balance for Three-Level NPC Inverter

A New Interleaved Double-Input Three-Level Boost Converter

An Interleaved Five-level Boost Converter with Voltage-Balance Control

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