A control strategy by instantaneous average values for parallel operation of single phase voltage source inverters based in the inductor current feedback

Lazzarin, Telles Brunelli; Bauer, Guilherme A. T.; Barbi, I.

doi:10.1109/ecce.2009.5316259

Cited by 15 publications

(17 citation statements)

References 27 publications

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“…Furthermore, the parallelism control does not modify the reference voltages used for the voltage control. This characteristic keeps the output voltages of the VSI in synchronism with the reference voltages in the whole range of operation (more details in [1,2,3,4]). Implementation cost of this control strategy in relation to other strategies is more one advantage.…”

Section: Control Strategy For Parallel Operation Of Three-phase Vsimentioning

confidence: 97%

“…The proposed control does not have to do complex calculations, it does not add extra sensors and it does not need a complex communication system. Therefore, its implementation is easier, cheaper and it can be done either with analog circuits as [2,3,4] or digital circuits as [1]. Nevertheless, before connecting the VSIs in parallel they need to receive the reference voltage, as show in Fig.…”

Section: Control Strategy For Parallel Operation Of Three-phase Vsimentioning

confidence: 98%

“…1. In [1,2,3,4] this voltage reference was an analog signal. It was generated sampling the electrical grid and sent through a "voltage reference bus" to the inverters.…”

Section: Control Strategy For Parallel Operation Of Three-phase Vsimentioning

confidence: 99%

“…The power circuit is composed of a PWM inverter, a delta-wye transformer and an LC filter. The principle of the control strategy was presented in [1,2,3,4]. It consists of two main loops in each VSI, one for the parallelism control and another for the voltage control, which both uses instantaneous values.…”

Section: Control Strategy For Parallel Operation Of Three-phase Vsimentioning

confidence: 99%

“…However, recent researches are trying to improve the reliability and redundancy of the systems with communication, as in [1,2,3,4], where the authors proposed a control strategy for parallelism of single and three-phase VSIs that only voltage reference is the information exchanged among the inverters. Hence, strategies related to communication, such as central control [5,6,7], master-slave control [8,9,10] and distributed control [1,2,3,4,11,12,13] are been improved in terms of reliability and redundancy, which increases the potential them to be applied in the parallelism of UPS. On the other hand, there are traditional strategies without communication based on the frequency and voltage droop [14,15,16,17].…”

Section: Introductionmentioning

confidence: 99%

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A digital communication system for a control strategy employed in the parallelism of three-phase voltage source inverter

Arbugeri

Lazzarin

Mussa

2013

2013 15th European Conference on Power Electronics and Applications (EPE)

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This paper describes a theoretical and experimental study on a digital communication system, which is employed in a control strategy for parallelism of three-phase voltage inverter (VSI). This control strategy only needs that all VSIs use a same voltage reference and thus it ensures the sharing of the load current and avoids current circulation among the inverters during transient and steady-state operation. Therefore, the communication among the inverter is implemented to transmit only the voltage reference. The paper proposes this communication system based on two bus, one that uses the own electrical grid and is called of Voltage Reference bus and another makes by CAN bus. The first puts the reference voltage of all inverters in synchronism and the second keeps the reference voltage in synchronism even during a fault of electrical grid. The proposed system was digitally implemented in a TMS320F2812 DSP and was verified through experimental results with a 10 kVA prototype, which has the parallel operation of two three-phase VSIs.

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Section: Control Strategy For Parallel Operation Of Three-phase Vsimentioning

confidence: 97%

Section: Control Strategy For Parallel Operation Of Three-phase Vsimentioning

confidence: 98%

“…1. In [1,2,3,4] this voltage reference was an analog signal. It was generated sampling the electrical grid and sent through a "voltage reference bus" to the inverters.…”

Section: Control Strategy For Parallel Operation Of Three-phase Vsimentioning

confidence: 99%

Section: Control Strategy For Parallel Operation Of Three-phase Vsimentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A digital communication system for a control strategy employed in the parallelism of three-phase voltage source inverter

Arbugeri

Lazzarin

Mussa

2013

2013 15th European Conference on Power Electronics and Applications (EPE)

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Nonuniform current distribution within parallel-connected batteries

et al. 2018

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Summary An imbalanced current distribution is often observed in cables of parallel batteries, which may limit the release of the energy and power in the battery pack. Hence, it is very important to analyze the homogeneous current distributions within parallel battery batteries and explore the effect on the state of charge and energy loss. Initially, it can be found that a battery near the load will experience a large local current under higher discharge rate. With the discharge, the current distribution will show a surge wave distribution, and the peak is gradually shifted backwards. As discharge continues, local current profile in segments will have different development trends, while current profile with lower initial current values increase, which leads to an entirely different form of current distribution with the initial stage of discharge. The current profile moves in a wavelike form transmission when the total discharge rate is low. The higher the current rate, the more divergent the current distribution. The state of charge distribution is also nonuniform, clearly indicating underutilization of active materials, which will further aggravate the nonuniformity of the local current distribution in the parallel battery pack.

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Instantaneous current‐sharing control scheme of multi‐inverter modules in parallel based on virtual circulating impedance

Wei

Zhu

et al. 2016

IET Power Electronics

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Parallel multi-inverter modules are characterised by expandable output power and improved reliability. A current-sharing control scheme has to be employed to achieve equally load current sharing of paralleled inverters. At present, circulating active/reactive power are applied to control the voltage in some current-sharing control schemes; however, the size and weight are increased owing to the extra inductor. In this study, the concept of virtual circulating impedance is proposed and introduced into current-sharing control scheme to achieve ideal performance without increasing size and weight in multi-inverter modules in parallel. The mathematical model of circulating impedance is established and the relationship between the phase and the amplitude of circulating current, the phase of inverter module's output reference voltage is decoupled. Simulation and experimental inverter modules are built and operated in parallel system. The results of simulation and experiment verify that the current-sharing control scheme based on circulating impedance is available and efficient.

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A control strategy by instantaneous average values for parallel operation of single phase voltage source inverters based in the inductor current feedback

Cited by 15 publications

References 27 publications

A digital communication system for a control strategy employed in the parallelism of three-phase voltage source inverter

A digital communication system for a control strategy employed in the parallelism of three-phase voltage source inverter

Nonuniform current distribution within parallel-connected batteries

Instantaneous current‐sharing control scheme of multi‐inverter modules in parallel based on virtual circulating impedance

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