Per-phase vector control strategy for a four-leg voltage source inverter operating with highly unbalanced loads in stand-alone hybrid systems

Ninad, Nayeem; Lopes, Luiz A. C.

doi:10.1016/j.ijepes.2013.09.019

Cited by 28 publications

(21 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A power-based coordinated control strategy is discussed in [209] for three-wire MGs that achieve unbalance mitigation under both the islanded and grid-connected modes. Ninad and Lopes [210] proposed a per-phase control strategy for a four-leg grid-forming inverter for achieving voltage balance at the PCC without sequence extraction and is shown to have a good performance even when the DG has to supply power through two phases and absorb through the third one. Peng et al [211] presented the small-signal analysis of voltage unbalance correction strategies for islanded MGs through a detailed state-space model using dynamic phasors, and proposed a new compensation technique, while Ismail et al [212] presented a strategy based on supercapacitor storage for improving the dynamic performance of the system under unbalanced and non-linear loads.…”

Section: Fig 4 Block Diagram Of a Typical Control Scheme For Addressmentioning

confidence: 99%

Unbalance mitigation strategies in microgrids

Vijay

Doolla

Chandorkar

2020

IET Power Electronics

View full text Add to dashboard Cite

Unbalance or asymmetry in the distribution network is a well-known power quality issue. In the modern active distribution system, with the increasing penetration of renewables, this phenomenon becomes more pronounced. In the context of microgrids (MGs), several works have been proposed for the management and mitigation of the unbalance, for both the sharing of unbalanced load and maintaining the voltage quality in the islanded mode and for the control of distributed generators in the grid-connected mode during unbalanced conditions. This study comprehensively reviews, summarises, and classifies the various strategies of the unbalance mitigation techniques for the islanded and grid-connected modes of operation for threephase MGs and presents the possible challenges and avenues for future investigations on the topic.

show abstract

Section: Fig 4 Block Diagram Of a Typical Control Scheme For Addressmentioning

confidence: 99%

Unbalance mitigation strategies in microgrids

Vijay

Doolla

Chandorkar

2020

IET Power Electronics

View full text Add to dashboard Cite

show abstract

“…The appropriate selection of the sliding control laws parameters will draw the desired control dynamics and ensure relevant control performances even under considerable load disturbances and parameters variations. As it can be seen from (7) and (12), two parameters, namely λ and Q, are related to each SMC reaching control law. It appears that when the sliding surface is large, the term λ s is preponderant in the control law, which means that large λ permits to reach the suited reference quickly, but at the expense of large overshoots.…”

Section: Smc Parameters Selectionmentioning

confidence: 99%

“…However, under such loading conditions, harmonic distortions (HDs) appear at twice of the fundamental frequency in the dq components, and at the fundamental frequency in the homopolar component due to the controller poor dynamic. To handle such drawbacks, other decomposition methods are proposed in some works [6][7][8]. In [8], a control strategy is developed based on the decomposition of the output voltage and current into instantaneous positive, negative, and homopolar sequence components using phasor representation.…”

Section: Introductionmentioning

confidence: 99%

Improved control strategy for power quality enhancement in standalone systems based on four‐leg voltage source inverters

Houari

Djerioui

Aït‐Ahmed

et al. 2018

IET Power Electronics

View full text Add to dashboard Cite

Standalone power supplies using renewable energy resources become a key solution to address both energy consumption and environmental restrictions in remote locations. These standalone systems are weak low-voltage networks, wherein the presence of heavy non-linear and/or unbalanced loads may adversely affect the output voltage quality. Accordingly, four-leg voltage-source inverters play an important role by providing both balanced and unbalanced loads with clean power and balanced output voltage. The reported work proposes a sliding mode control (SMC) along with an iterative learning control (ILC) for harmonic compensation in the presence of critical load conditions such as unbalanced non-linear loads. Indeed, under substantial disturbances, the ILC harmonic compensator smoothly adjusts the input control signal of the SM controller in such a manner to properly reject the disturbing harmonics. The design methodology of the proposed SMC-ILC control scheme is detailed and its effectiveness is validated through simulation and experimental results.

show abstract

“…However, reference current generation is a function of only fundamental sequence admittance and voltages and so the controller does not respond to nonfundamental components. An individual phase vector control approach for unbalanced load compensation through a 4‐leg inverter is presented in Ninad and Lopes, but the scheme includes a stiff DC source. Also, fundamental components are only considered and so the current injected into the grid is distorted due to low‐order voltage harmonics resulting in a low power factor and power transfer to the grid.…”

Section: Introductionmentioning

confidence: 99%

Modified composite power control strategy for grid connected wind-PV systems with unbalanced nonlinear current

Sivakumar¹,

Arutchelvi²

2018

Int Trans Electr Energ Syst

View full text Add to dashboard Cite

Summary A new control algorithm for a grid connected inverter fed by hybrid photovoltaic (PV)‐wind system model for unbalanced nonlinear load at point of common coupling (PCC) is proposed in this paper. The proposed modified composite power controller has an additional feature where the nonfundamental cross interactive component of the current is added to the fundamental for current reference generation for PV sourced inverter control. The proposed controller includes power, voltage, and current control loops in addition to a computed virtual nonfundamental admittance block. The power control loop maintains instantaneous power balance at the PCC and computes the nonfundamental virtual admittance required to effectively cancel the nonsinusoidal power components at the PCC. The voltage control loop computes the reactive current reference for the current control loops by incorporating the drops due to instantaneous sinusoidal and nonsinusoidal current waves. The current control loop regulates the average and suppresses oscillating power in a dual decoupled double synchronous reference frame to generate a modulating signal to the PV sourced inverter. Simulations are conducted for the proposed hybrid PV‐IG scheme in different cases of unbalanced nonlinear load variations at the PCC in MATLAB and the performance of the proposed controller is compared with existing grid control direct power control and composite power controller schemes. The Spectrum Digital F28335 eZdsp board @150 MHz speed with IDE/tool chain Texas Instruments Code Composer Studio was used to implement the proposed controller model. Simulation and experimental results confirm the veracity of the developed model.

show abstract

Per-phase vector control strategy for a four-leg voltage source inverter operating with highly unbalanced loads in stand-alone hybrid systems

Cited by 28 publications

References 28 publications

Unbalance mitigation strategies in microgrids

Unbalance mitigation strategies in microgrids

Improved control strategy for power quality enhancement in standalone systems based on four‐leg voltage source inverters

Modified composite power control strategy for grid connected wind-PV systems with unbalanced nonlinear current

Contact Info

Product

Resources

About