A compensation strategy for parallel inverters to achieve precise weighting current distribution

Hsieh, Hui-Chung; Wu, Tsai‐Fu; Wu, Yu-En; Nien, Hung-Shou

doi:10.1109/ias.2005.1518463

Cited by 14 publications

(7 citation statements)

References 13 publications

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“…In the control strategy it is selected v * 2o = v * 3o = v * 4o = 0. Because of (5), voltages v * g0 12 , v * l012 , v * g0 34 , and v * l034 can not be chosen independently. If the relation (5) …”

Section: A Configuration Imentioning

confidence: 98%

“…3(a) presents the control block diagram for configuration I. The capacitor dc-link voltages v C12 and v C34 are adjusted to their reference values v * C 12 and v * C 34 using the controller R C12 and R C34 , respectively (conventional PI type controllers). Those controllers provide the amplitude of the reference currents i * 1a and i * 3a .…”

Section: In This Case It Comesmentioning

confidence: 99%

“…Several works have studied either independent parallel rectifiers [1], [2], [5] and parallel inverters [12], or three-phase to three-phase ac-dc-ac converter are available [13]. On the other hand, it is usual to have only a single-phase power grid while three-phase loads (particularly adjustable speed drives) may request a three-phase power grid [14].…”

Section: Introductionmentioning

confidence: 99%

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Reversible AC Drive Systems Based on Parallel AC-AC DC-Link Converters

Jacobina

Santos²,

Gouveia

et al. 2008

2008 IEEE Industry Applications Society Annual Meeting

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In this paper, two reversible single-phase to three-phase ac drive systems are proposed. They are composed of a single induction motor fed by two parallel singlephase to three-phase dc-link converters without isolation transformers. For sake of generalization a configuration composed of three parallel single-phase to three-phase dclink converters is also discussed. The proposed topologies permit to reduce the current and power ratings of the power switches when compared to the conventional singlephase to three-phase dc-link converter. Suitable modelling and control strategy of the systems based on odq approach, inclusive the unbalanced case, are developed. Simulated and experimental results are presented.

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Section: A Configuration Imentioning

confidence: 98%

Section: In This Case It Comesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Reversible AC Drive Systems Based on Parallel AC-AC DC-Link Converters

Jacobina

Santos²,

Gouveia

et al. 2008

2008 IEEE Industry Applications Society Annual Meeting

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“…3, it can be inferred thatī a andv a0 will not be affected by the control variables either. As a consequence, ∆V a0 = 0 and therefore (17) becomes…”

Section: Current Balancing Methodsmentioning

confidence: 99%

Current-Balancing Technique for Interleaved Voltage Source Inverters With Magnetically Coupled Legs Connected in Parallel

Capella

Pou²,

Ceballos

et al. 2015

IEEE Trans. Ind. Electron.

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Abstract-Connecting legs in parallel in a voltage source inverter is a way to increase the output current and thus, its rated power. The connection can be made using either coupled or uncoupled inductors and achieving an even contribution to the output current from all the legs is a crucial issue. Circulating currents produce additional losses and stress to the power devices of the converter. Therefore, they should be controlled and minimized. An efficient technique to attain such a balance when coupled inductors are used is presented in this paper. The proposed technique can also be used when the inductors are uncoupled, since it is a particular case where the coupling coefficients are zero. This technique does not include proportionalintegral controllers and does not require any parameter tuning either. The exact control action needed to reach current balance is straightforwardly calculated and applied. Experimental results are shown in this paper to verify the efficiency of the proposed balancing method.

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“…Several approaches have been proposed to get proper voltage synchronization [12][13][14][15]. In [12], the authors utilize a synchronization control unit (SCU) that uses microcontroller to generate a synchronous signal and sends it to each parallel connected inverter in every line cycle. This approach depends on the SCU and the synchronization is affected if the SCU fails.…”

Section: Introductionmentioning

confidence: 99%

Voltage synchronization scheme based on zero crossing detection for parallel connected inverters in AC microgrids

Azrik

Ahmed

Finney

et al. 2012

2012 IEEE International Symposium on Industrial Electronics

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A new voltage synchronization scheme is proposed for parallel connected inverters in AC microgrids. Instead of using the same reference voltage for all inverters, this scheme directly synchronizes the reference voltage of a connecting inverter to the point of common coupling voltage. Two contactors are used with each inverter module to enable the inverter to operate in 4 different modes. Voltage synchronization using this scheme requires no control interconnection among parallel connected inverters. Experimental results validate the practicality of the proposed synchronization schemes.

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A compensation strategy for parallel inverters to achieve precise weighting current distribution

Cited by 14 publications

References 13 publications

Reversible AC Drive Systems Based on Parallel AC-AC DC-Link Converters

Reversible AC Drive Systems Based on Parallel AC-AC DC-Link Converters

Current-Balancing Technique for Interleaved Voltage Source Inverters With Magnetically Coupled Legs Connected in Parallel

Voltage synchronization scheme based on zero crossing detection for parallel connected inverters in AC microgrids

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