Enhanced frequency shift carrier modulation for H-bridge multilevel converter to conquer the impact of instability in deputize condenser voltage

Abstract

H-bridge multilevel converter is the most challenging topology from nominal to high power applications. However, when the energy is exchanged between AC side and DC side or vice versa, the fluctuation in the capacitor used in deputize unit is unavoidable. The fluctuation in the deputize unit is due to the increase in the total harmonic distortion by the capacitor in the output voltages. This total harmonic distortion is evaded by exploring the deputize unit capacitor voltage mathematically. This paper proposes the enhanced frequency shift carrier modulation in H-bridge multilevel converter to suppress the influence of fluctuation in deputize unit capacitor voltages. Enhanced frequency shift carrier modulation is considered for nonlinear compensation. The principal results of using this enhanced frequency shift carrier modulation improvise the total harmonic distortion in the output voltage of H-bridge multilevel converter. Simulation and experimental results are done using MATLAB/SIMULINK to verify the effectiveness of the proposed control scheme.

Keywords

Instability in capacitor voltage H-bridge multilevel converter enhanced frequency shift carrier modulation deputize unit

Get full access to this article

View all access options for this article.

References

Rodriguez

Bernet

Steimer

, et al. A survey on neutral-point-clamped inverters. IEEE Trans Ind Electron 2010; 57: 2219–2230.

Malinowski

Gopakumar

Rodriguez

, et al. A survey on cascaded multilevel inverters. IEEE Trans Ind Electron 2010; 57: 2197–2206.

Lesnicar

Marquardt

An innovative modular multilevel converter topology suitable for a wide power range. In: IEEE Bologna power tech conference, Bologna, Italy, 14 June 2003, pp. 1–6. New Jersey, US: IEEE.

Nupur

Bindeshwar

Singh

SP, et al.

Multilevel inverters: a literature survey on topologies and control strategies. In: IEEE, power, control and embedded systems ICPCES, Allahabad, India, 17–19 December 2012, pp.1–11. New Jersey, US: IEEE.

Xiaotian

Timothy

Adrià

J-F.

A new resonant modular multilevel step-down DC–DC converter with inherent-balancing.

IEEE Trans Power Electron 2015; 30: 78-88.

Meshram

Borghate

VB.

A simplified nearest level control (NLC) voltage balancing method for modular multilevel converter (MMC). IEEE Trans Power Electron 2015; 30: 450–462.

Ilves

Antonopoulos

Norrga

, et al. A new modulation method for the modular multilevel converter allowing fundamental switching frequency. IEEE Trans Power Electron 2012; 27: 3482–3494.

Rohner

Bernet

Hiller

, et al. Pulsewidth modulation scheme for the modular multilevel converter. In: Proceedings of the 13th European conference power electronics and applications, Barcelona, Spain, 8–10 September 2009, pp. 1–10.

Wang

Zhu

, et al. An improved pulse width modulation method for chopper-cell-based modular multilevel converters. IEEE Trans Power Electron 2012; 27: 3472–3481.

10.

Fan

Zhang

Xiong

, et al. An improved control system for modular multilevel converters with new modulation strategy and voltage balancing control. IEEE Trans Power Electron 2015; 30: 358–371.

11.

Hagiwara

Akagi

Control and experiment of pulse width modulated modular multilevel converters. IEEE Trans Power Electron 2009; 24: 1737–1746.

12.

Yang

, et al. Analysis of the phase-shifted carrier modulation for modular multilevel converters. IEEE Trans Power Electron 2015; 30: 297–310.

13.

Deng

Chen

Voltage-balancing method for modular multilevel converters under phase-shifted carrier-based pulsewidth modulation. IEEE Trans Ind Electron 2015; 62: 4158–4169.

14.

Zhang

Huang

Yao

, et al. Circulating harmonic current elimination of a CPS-PWM-based modular multilevel converter with a plug-in repetitive controller. IEEE Trans Power Electron 2014; 29: 2083–2097.

15.

Ilves

Harnefors

Norrga

, et al. Analysis and operation of modular multilevel converters with phase-shifted carrier PWM. IEEE Trans Power Electron 2015; 30: 268–283.

16.

Solas

Abad

Barrena

, et al. Modular multilevel converter with different submodule concepts – part I: capacitor voltage balancing method. IEEE Trans Ind Electron 2013; 60: 4525–4535.

17.

Liu

Modulation and closed-loop-based DC capacitor voltage control for MMC with fundamental switching frequency. IEEE Trans Power Electron 2015; 30: 327–338.

18.

Deng

Chen

Voltage-balancing method for modular multilevel converters switched at grid frequency. IEEE Trans Ind Electron 2015; 62: 2835–2847.

19.

Peng

FZ.

A generalized multilevel inverter topology with self voltage balancing. IEEE Trans Ind Appl 2001; 3: 611–618.

20.

Peralta

Saad

Dennetiere

, et al. Detailed and averaged models for a 401-level MMC-HVDC system. IEEE Trans Power Del 2012; 27: 1501–1508.