Deadbeat Control Strategy of Circulating Currents in Parallel Connection System of Three-Phase PWM Converter

Zhang, Xueguang; Zhang, Wenjie; Chen, Jiaming; Xu, Dianguo

doi:10.1109/tec.2014.2297994

Cited by 127 publications

(18 citation statements)

References 17 publications

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“…Being an intelligent controller, the derivatives of control parameters depict the future state of the system and hence the control action. For research purposes, a deadbeat controller benefits the system with error compensation in the inverter current but is also sensitive to the network parameters 62‐64 . In Figure 3, the schematic layout of the deadbeat controller with reference signal r(z) processed through the controller to the designed system with y(z) as the main output where e represents an error signal to the controller unit, Q and P represents the polynomials of the transfer function, u represents the manipulated signal, and P represents the actual system/model. Model Predictive Control (MPC): It minimizes the forecast error while aiming at accurate tracking of the current parameter.…”

Section: Microgrid: Issues and Controllermentioning

confidence: 99%

A comprehensive review on control techniques for stability improvement in microgrids

Mehta

Basak

2021

Int Trans Electr Energ Syst

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In recent times, with the increase in the penetration of various renewable energy sources (RESs) into power systems, the complications related to the stability issues have increased. The main contribution of this paper is an in‐depth analysis of research in microgrid based on small‐signal, transient, and voltage stability. The small‐signal stability has been discussed based on uncertain load, limitation in power generation capacity, and nature of sluggish feedback observed in few microgrid systems. Instability caused by a transient phenomenon in microgrid has been thoroughly analyzed for losses in distributed energy resources (DERs), islanding and transition modes of operation, load shedding, and faults causing instability. The voltage fluctuations are duly considered in the perspective of load shedding, type of loads, power unbalancing, and different types of faults in microgrid systems. The existing controllers have been compared based on steady‐state error, response time, and robustness etc. The voltage, frequency, and active/reactive power control are analyzed based on centralized, decentralized, hierarchal/distributed control schemes aiming stabilization of microgrid systems. Finally, stability improvement features have been explored in detail, finding the implementation of microgrid stabilizers, energy storage devices, FACTS devices, load balancing, resource forecasting including the adaptive controller. Hence, the uniqueness of this paper can be considered as a state‐of‐the‐art review of the abovementioned stability components in the microgrid system which is not available in the published literature with a similar amount of vastness.

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Section: Microgrid: Issues and Controllermentioning

confidence: 99%

A comprehensive review on control techniques for stability improvement in microgrids

Mehta

Basak

2021

Int Trans Electr Energ Syst

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“…A trap filter for the output of interleaved converters was studied in [33] and as a result of several considerations on the design for the output filter, a combination of an LCL filter with an LC harmonic trap was proposed in [11]. A methodology for calculating the optimum angles of interleaved converters under PS-PWM with unequal power sharing in order to minimize the grid current distortion was developed in [20] and a deadbeat controller for control of the circulating current was proposed in [34].…”

Section: Current Control In Interleaved Convertersmentioning

confidence: 99%

Single-Carrier Phase-Disposition PWM Techniques for Multiple Interleaved Voltage-Source Converter Legs

Konstantinou

Capella

Pou

et al. 2018

IEEE Trans. Ind. Electron.

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“…with: (30) where s k denotes the switching function. Defining y = i xk and z = u xk − v cxk , Equation (29) can then be expressed as:…”

Section: Online Parameter Estimator Designmentioning

confidence: 99%

“…Improved modulation techniques are commonly-used active methods [28]. The voltage zero vector of space-vector-pulse-width modulation (SVPWM) is used in each paralleled module to suppress the circulating current [29,30]. However, the control performance deteriorates when the system parameters are different in each converter module.…”

Section: Introductionmentioning

confidence: 99%

Adaptive Backstepping Control with Online Parameter Estimator for a Plug-and-Play Parallel Converter System in a Power Switcher

Guo

Zhang

et al. 2018

Energies

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This study aims to address the inherent uncertainty in plug loads and load extraction, distributed generation, and the inevitable circulating current in a parallel structure. Therefore, in this paper, an adaptive backstepping control scheme with an online parameter estimator (OPE) for a plug-and-play parallel converter system in a four-port power switcher is proposed. The adaptive backstepping control method was designed in the dq0 coordinate system to suppress the circulating current in the zero-component; the circulating current can be suppressed by using an embedded algorithm and omitting the extra controller. An adaptive update law was designed to weaken the influence of the arbitrary plug and extraction operations in the DC and AC buses to realize the plug-and-play function. The transient tracking performance is governed by the limitation of maximum total errors in the voltage and current. As a result, the settling times of the voltage, current, and power decreased. Additionally, to further improve the system robustness, an online inductance and resistance estimator was established using an optimal algorithm that solves the weighted least squares problem. In the estimator, there are no additional voltage and current sensors needed, and the mean squared error (MSE) of the estimation can be minimized. Simulation studies on a two-converter parallel system with a plug-and-play function were conducted using MATLAB/SIMULINK (R2018b, MathWorks, Natick, MA, USA) to verify the effectiveness of the proposed adaptive backstepping control strategy. The results show that this strategy improves system performance over that of a system with unbalanced parameters among a parallel structure with AC and DC system disturbances caused by arbitrary plug and extraction operations.

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Deadbeat Control Strategy of Circulating Currents in Parallel Connection System of Three-Phase PWM Converter

Cited by 127 publications

References 17 publications

A comprehensive review on control techniques for stability improvement in microgrids

A comprehensive review on control techniques for stability improvement in microgrids

Single-Carrier Phase-Disposition PWM Techniques for Multiple Interleaved Voltage-Source Converter Legs

Adaptive Backstepping Control with Online Parameter Estimator for a Plug-and-Play Parallel Converter System in a Power Switcher

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