A Novel PWM Modulation Strategy for DC Voltage Balancing in Cascaded H-Bridge Multilevel Converters

Barrena, Jon Andoni; Marroyo, Luis; Rodrı́guez, Miguel A.; Torrealday, J.R.

doi:10.1109/eurcon.2007.4400602

Cited by 26 publications

(5 citation statements)

References 8 publications

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“…For our development, we used a TEC1-12706 Peltier element (Hebei I.T., Shanghai, China) mounted on a heatsink to improve heat dissipation. It is characterized by a maximum power of 50 W, a maximum temperature difference between the faces of 66 °C, a maximum current of 6.4 A and a maximum voltage of 14.4 V. To modulate heat flux and consequently allow full range temperature variation on a single face of the cell, we used a power drive based on a dual full-bridge [ 33 ] L298N driver, which is an integrated 15-lead Multiwatt and Power SO20 monolithic package [ 34 ]. This device, using standard TTL logic, allows to control the Peltier cell through a microcontroller.…”

Section: Methodsmentioning

confidence: 99%

Thermal Compensation of Low-Cost MEMS Accelerometers for Tilt Measurements

Ruzza

Guerriero

Revellino

et al. 2018

Sensors

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Low-cost MEMS accelerometers have the potential to be used in a number of tilt-based monitoring applications but have the disadvantage of being very sensitive to temperature variation (thermal drift). In this paper, we analyze the thermal behavior of a low-cost sensor in the range −10 to +45 °C in order to provide a simple compensation strategy to mitigate this problem. For sensor analysis, we have developed a miniaturized thermal chamber, which was mounted on a tilting device to account for tilt angle variation. The obtained raw data were used to construct low degree polynomial equations that by relating the measurement error induced by thermal drift (i.e., acceleration residuals) to temperature and inclination (of each specific axis), can be used for thermal compensation. To validate our compensation strategy, we performed a field monitoring test and evaluated the compensation performance by calculating RMS errors before and after correction. After compensation, the RMS errors calculated for both the X and Y axes decreased by 96%, indicating the potential of using a simple set of equations to solve common drawbacks that currently make low-cost MEMS sensors unsuitable for tilt-based monitoring applications.

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Section: Methodsmentioning

confidence: 99%

Thermal Compensation of Low-Cost MEMS Accelerometers for Tilt Measurements

Ruzza

Guerriero

Revellino

et al. 2018

Sensors

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“…This issue will deteriorate the quality of injected AC current to the grid. In [25], a modified PWM switching algorithm has been proposed for voltage balancing. This algorithm resolves the previous drawbacks, but it uses a high-burden algorithm and needs an extra field programmable gate array for hardware implementation.…”

Section: Iet Power Electronicsmentioning

confidence: 99%

State feedback control strategy and voltage balancing scheme for a transformer‐less STATic synchronous COMpensator based on cascaded H‐bridge converter

Neyshabouri¹,

Iman‐Eini²,

Miranbeigi³

2015

IET Power Electronics

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In this study, a transformer-less STATic synchronous COMpensator (STATCOM) based on cascaded H-bridge (CHB) multilevel converter with floating DC links is presented. This study introduces a control strategy based on state feedback control algorithm in order to supply reactive power to the grid and to compensate the total losses in the internal H-bridge cells. Using this strategy, the converter stability and the fast dynamic response are guaranteed. Moreover, a voltage balancing strategy is proposed, which not only regulates the DC-link voltage of H-bridge cells to the reference value, but also evenly distributes total reactive power among the converter cells, even when there is difference between the losses of H-bridge cells. A 21-level CHB-based STATCOM is simulated in PSCAD/EMTDC environment to evaluate the performance and effectiveness of the new control strategy. Furthermore, the validity of new method is verified on a down-scaled 7-level CHB prototype.

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“…The research interests of cascaded STATCOM are concentrated on modulation [6][7][8], DC capacitors voltage balance [9][10][11][12][13][14] and current control strategy.…”

Section: Introductionmentioning

confidence: 99%

“…Generally, these papers regulate the instantaneous power that flows through the individual modules to balance the capacitors voltage. These papers adjust the reference voltage [9][10], pulse width [11,12], switching sequences [13,14] or carriers to change the charge/discharge duration, so as to vary the capacitors absorbing/releasing energy and maintain the individual capacitors voltage balance. The instantaneous power adjustment method has fast response, and it has influence on the switching frequency and output voltage, which solves the individual balance problem perfectly.…”

Section: Introductionmentioning

confidence: 99%

A new cascaded multilevel converter topology with energy exchange unit for STATCOM application

Yang

Zhang

et al. 2015

2015 9th International Conference on Power Electronics and ECCE Asia (ICPE-ECCE Asia)

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The star-connected H-bridge cascaded converter has the disadvantage of capacitors unbalance especially when the unbalance occurs between phases. This paper analyzed one novel topology with energy exchange unit (EEU) to realize the phase capacitors voltage balance. After analyzing the converter structure and balance operation concept, this paper provided detailed modulation and capacitors balance control, including maintaining the EEU capacitor voltage stable, sharing the energy storage between phases and in same phase. The simulation results demonstrate the correction of the topology and control.Index Terms--H-bridge cascaded converter, STATCOM, phase balance control, energy exchange unit.

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A Novel PWM Modulation Strategy for DC Voltage Balancing in Cascaded H-Bridge Multilevel Converters

Cited by 26 publications

References 8 publications

Thermal Compensation of Low-Cost MEMS Accelerometers for Tilt Measurements

Thermal Compensation of Low-Cost MEMS Accelerometers for Tilt Measurements

State feedback control strategy and voltage balancing scheme for a transformer‐less STATic synchronous COMpensator based on cascaded H‐bridge converter

A new cascaded multilevel converter topology with energy exchange unit for STATCOM application

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