Robust predictive current control of a grid-connected inverter with harmonics compensation

Heo, Hye-Seong; Choe, Gyu-Ha; Mok, Hyung-Soo

doi:10.1109/apec.2013.6520602

Cited by 15 publications

(13 citation statements)

References 12 publications

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“…As other approaches, the proportional-resonant (PR) controller, the predictive controller [11], and the repetitive feedback controller [12][13][14] have been proposed in literature. The PR controllers have been widely used for grid-connected inverters, due to their capability to reject individual harmonics by introducing an infinite gain at a selected resonance frequency [15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

“…This controller mimics the deadbeat control in the synchronous dq-reference frame, and has the advantage of simple implementation. In order to minimize the resonant behavior during the grid connection, a predictive controller has been designed by using the discrete-time model of inverter system in the natural reference frame [11].…”

Section: Introductionmentioning

confidence: 99%

“…Configuration of the simplified equivalent circuit of three-phase grid-connected inverter with LCL filter. PWM: pulse width modulation From (5) to (10), the state-space model of the inverter system can be obtained as .x(t) = Ax(t) + Bu(t) + De(t)(11) …”

mentioning

confidence: 99%

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A Systematic Controller Design for a Grid-Connected Inverter with LCL Filter Using a Discrete-Time Integral State Feedback Control and State Observer

2018

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Inductive-capacitive-inductive (LCL)-type filters are currently preferred as a replacement for L-type filters in distributed generation (DG) power systems, due to their superior harmonic attenuation capability. However, the third-order dynamics introduced by LCL filters pose a challenge to design a satisfactory controller for such a system. Conventionally, an LCL-filtered grid-connected inverter can be effectively controlled by using a full-state feedback control. However, this control approach requires the measurement of all system state variables, which brings about more complexity for the inverter system. To address this issue, this paper presents a systematic procedure to design an observer-based integral state feedback control for a LCL-filtered grid-connected inverter in the discrete-time domain. The proposed control scheme consists of an integral state feedback controller and a full-state observer which uses the control input, grid-side currents, and grid voltages to predict all the system state variables. Therefore, only the grid-side current sensors and grid voltage sensors are required to implement the proposed control scheme. Due to the discrete-time integrator incorporated in the state feedback controller, the proposed control scheme ensures both the reference tracking and disturbance rejection performance of the inverter system in a practical and simple way. As a result, superior control performance can be achieved by using the reduced number of sensors, which significantly reduces the cost and complexity of the LCL-filtered grid-connected inverter system in DG applications. To verify the practical usefulness of the proposed control scheme, a 2 kW three-phase prototype grid-connected inverter has been constructed, and the proposed control system has been implemented based on 32-bit floating-point digital signal processor (DSP) TMS320F28335. The effectiveness of the proposed scheme is demonstrated through the comprehensive simulation and experimental results.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Systematic Controller Design for a Grid-Connected Inverter with LCL Filter Using a Discrete-Time Integral State Feedback Control and State Observer

2018

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“…As an alternative solution, non-selective harmonic compensation strategies such as the predictive control [7], repetitive control [8]- [10], and sliding mode control (SMC) [11]- [13] have been reported. The predictive control has been developed to minimize the forecast error in order that the reference current can be tracked properly without any errors, which yields a satisfactory current response with minimum THD level.…”

Section: Introductionmentioning

confidence: 99%

Simple and Reliable Harmonic Mitigation Strategy in Power Electronic Converter for Grid Integration of Renewable Energy Resources

Lai¹,

Kim²

2017

IJCA

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“…Then the control action is developed to minimize the forecast error so that the reference current can be tracked properly without any error. Seong et al [88]. have proposed predictive active damping method to minimize the resonant behavior during the grid connection, this method is added with the phase and gain compensations.…”

Section: Predictive Controlmentioning

confidence: 99%

A survey on control of electric power distributed generation systems for microgrid applications

Bouzid

Guerrero

Chériti

et al. 2015

Renewable and Sustainable Energy Reviews

336

148

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Abstract-The introduction of microgrids in distribution networks based on power electronics facilitates the use of renewable energy resources, distributed generation (DG) and storage systems while improving the quality of electric power and reducing losses thus increasing the performance and reliability of the electrical system, opens new horizons for microgrid applications integrated into electrical power systems. The hierarchical control structure consists of primary, secondary, and tertiary levels for microgrids that mimic the behavior of the mains grid is reviewed. The main objective of this paper is to give a description of state of the art for the distributed power generation systems (DPGS) based on renewable energy and explores the power converter connected in parallel to the grid which are distinguished by their contribution to the formation of the grid voltage and frequency and are accordingly classified in three classes. This analysis is extended focusing mainly on the three classes of configurations grid-forming, grid-feeding, and gridsupporting. The paper ends up with an overview and a discussion of the control structures and strategies to control distribution power generation system (DPGS) units connected to the network.

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Robust predictive current control of a grid-connected inverter with harmonics compensation

Cited by 15 publications

References 12 publications

A Systematic Controller Design for a Grid-Connected Inverter with LCL Filter Using a Discrete-Time Integral State Feedback Control and State Observer

A Systematic Controller Design for a Grid-Connected Inverter with LCL Filter Using a Discrete-Time Integral State Feedback Control and State Observer

Simple and Reliable Harmonic Mitigation Strategy in Power Electronic Converter for Grid Integration of Renewable Energy Resources

A survey on control of electric power distributed generation systems for microgrid applications

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