Phase-Shifted Carrier Pulse Width Modulation Based on Particle Swarm Optimization for Cascaded H-bridge Multilevel Inverters with Unequal DC Voltages

Cai, Xinjian; Wu, Zhenxing; Li, Quanfeng; Shu-xiu, Wang

doi:10.3390/en8099670

Cited by 21 publications

(9 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The arm voltage is known to be the sum of SM output voltages on the arm. With the CPS-PWM scheme [24], u U j , u Mj , and u Lj can be controlled to…”

Section: Basis Operationmentioning

confidence: 99%

A Hybrid Nine-Arm High-Voltage Inverter with DC-Fault Blocking Capability

et al. 2019

View full text Add to dashboard Cite

The nine-arm inverter integrates two modular multilevel converters (MMCs) into one compact inverter to diminish the number of power semiconductor devices. It can be used for dual-motor driving or connecting two AC power sources in a multi-terminal high voltage direct current (HVDC) system, etc. Although the half-bridge based modular multilevel converter has the fewest components, it is generally not resistant to the DC-side faults. In order to achieve a DC fault blocking capability with high efficiency and low cost, this paper proposes a hybrid nine-arm high-voltage inverter, which is consists of a full-bridge sub-module (FBSM) and a half-bridge sub-module (HBSM). Firstly, the topology, operation modes, and modulation strategy of the proposed hybrid inverter are presented. Then, by analyzing the potential short-circuit current paths between different ports, the ability of the proposed hybrid inverter to block the DC faults is described and the appropriate ratio of HBSM and FBSM is determined to further reduce the number of devices and the losses of the proposed hybrid inverter. Finally, simulation results based on MATLAB/Simulink are provided to demonstrate the effectiveness and feasibility of the proposed hybrid nine-arm high-voltage inverter under normal operation and DC fault condition.

show abstract

“…The arm voltage is known to be the sum of SM output voltages on the arm. With the CPS-PWM scheme [24], u U j , u Mj , and u Lj can be controlled to…”

Section: Basis Operationmentioning

confidence: 99%

A Hybrid Nine-Arm High-Voltage Inverter with DC-Fault Blocking Capability

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Figure 2 shows the diagram of a five-phase voltage source inverter which is called the classic method of direct torque control in this article. There are two major drawbacks to applying inverter: low-frequency voltage harmonics and high torque ripple [5][6][7]. To eliminate these problems, the direct torque control method with a three-phase to five-phase matrix converter ( Figure 3) is introduced [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Speed Control of Matrix Converter-Fed Five-Phase Permanent Magnet Synchronous Motors under Unbalanced Voltages

et al. 2017

View full text Add to dashboard Cite

Five-phase permanent magnet synchronous motors (PMSM) have special applications in which highly accurate speed and torque control of the motor are a strong requirement. Direct Torque Control (DTC) is a suitable method for the driver structure of these motors. If in this method, instead of using a common five-phase voltage source inverter, a three-phase to five-phase matrix converter is used, the low-frequency current harmonics and the high torque ripple are limited, and an improved input power factor is obtained. Because the input voltages of such converters are directly supplied by input three-phase supply voltages, an imbalance in the voltages will cause problems such as unbalanced stator currents and electromagnetic torque fluctuations. In this paper, a new method is introduced to remove speed and torque oscillator factors. For this purpose, motor torque equations were developed and the oscillation components created by the unbalanced source voltage, determined. Then, using the active and reactive power reference generator, the controller power reference was adjusted in such a way that the electromagnetic torque of the motor did not change. By this means, a number of features including speed, torque, and flux of the motor were improved in terms of the above-mentioned conditions. Simulations were analyzed using Matlab/Simulink software.

show abstract

“…As shown in Figure 3, there are two common vertexes, named as interface vector 1 and interface vector 2 . If the interface vector is chosen as a starting vector, the three vectors in the same triangle can be applied with two basic switching modes.…”

Section: Switching Path Planningmentioning

confidence: 99%

“…Multilevel inverters have been selected as a preferred power converter topology for high voltage and high power applications [1,2]. They are widely used in medium voltage motor driver [3], high-voltage direct current (HVDC) transmission systems [4], static var generator (SVG) [5], active power filter (APF) [6] and other applications [7,8].…”

Section: Introductionmentioning

confidence: 99%

A Switching Frequency Optimized Space Vector Pulse Width Modulation (SVPWM) Scheme for Cascaded Multilevel Inverters

et al. 2017

View full text Add to dashboard Cite

This paper presents a novel switching frequency optimized space vector pulse width modulation (SVPWM) scheme for cascaded multilevel inverters. The proposed SVPWM is developed in a α β coordinate system, in which the voltage vectors have only integer entries and the absolute increment of coordinate values between adjacent vectors is equal to dc-bus voltage of power cells (1 pu). The new SVPWM scheme is built with three categories of switching paths. During each switching path, the change of one phase voltage is limited in 1 pu. This contributes to decrease the number of commutations of switches. The proposed SVPWM scheme is validated on a 7-level cascaded inverter and the results show that it significantly outperforms traditional SVPWM schemes in terms of decreasing the number of switch commutations.

show abstract

Phase-Shifted Carrier Pulse Width Modulation Based on Particle Swarm Optimization for Cascaded H-bridge Multilevel Inverters with Unequal DC Voltages

Cited by 21 publications

References 32 publications

A Hybrid Nine-Arm High-Voltage Inverter with DC-Fault Blocking Capability

A Hybrid Nine-Arm High-Voltage Inverter with DC-Fault Blocking Capability

Speed Control of Matrix Converter-Fed Five-Phase Permanent Magnet Synchronous Motors under Unbalanced Voltages

A Switching Frequency Optimized Space Vector Pulse Width Modulation (SVPWM) Scheme for Cascaded Multilevel Inverters

Contact Info

Product

Resources

About