Abc-frame complex-coefficient filter and controller based current harmonic elimination strategy for three-phase grid connected inverter

Guo, Xiaoqiang; Guerrero, Josep M.

doi:10.1007/s40565-016-0189-4

Cited by 15 publications

(6 citation statements)

References 19 publications

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“…Increasing PLL bandwidth is helpful for the fast and accurate grid synchronization. The PLL bandwidth should be large enough for the fast grid synchronization, and this is why diverse PLL designs have been proposed, as shown in [22][23][24][25][26][27][28]. However, when the PLL bandwidth is increased beyond a certain limit, the system may become unstable due to resonance between the inverter and the weak grid.…”

Section: Introductionmentioning

confidence: 99%

Impact of phase-locked loop on stability of active damped LCL-filter-based grid-connected inverters with capacitor voltage feedback

Guo

Liu

Wang

2017

J. Mod. Power Syst. Clean Energy

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Active damped LCL-filter-based inverters have been widely used for grid-connected distributed generation (DG) systems. In weak grids, however, the phase-locked loop (PLL) dynamics may detrimentally affect the stability of grid-connected inverters due to interaction between the PLL and the controller. In order to solve the problem, the impact of PLL dynamics on small-signal stability is investigated for the active damped LCL-filtered grid-connected inverters with capacitor voltage feedback. The system closed-loop transfer function is established based on the Norton equivalent model by taking the PLL dynamics into account. Using an established model, the system stability boundary is identified from the viewpoint of PLL bandwidth and current regulator gain. The accuracy of the ranges of stability for the PLL bandwidth and current regulator gain is verified by both simulation and experimental results.

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Section: Introductionmentioning

confidence: 99%

Impact of phase-locked loop on stability of active damped LCL-filter-based grid-connected inverters with capacitor voltage feedback

Guo

Liu

Wang

2017

J. Mod. Power Syst. Clean Energy

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“…In this paper, a multiple-complex-coefficient filter [27,30] is proposed to extract positive sequence voltage components as in (16), and the detailed model of this filter on Matlab/Simulink is showed in Fig. 6.…”

Section: Extraction Of the Positive Sequence Componentsmentioning

confidence: 99%

“…This paper proposes a calculation method for limiting the current magnitude of grid-connected inverters in operation under voltage imbalance. In the proposed method, a phase-locked loop and a multiple-complex-coefficient filter [30] are used to extract the positive sequence components of the grid voltage and reject the adverse effects of the negative sequence voltages. Moreover, a power calculation method is also useful when voltage imbalance occurs.…”

Section: Introductionmentioning

confidence: 99%

Archives of Electrical Engineering

Tran

2022

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Grid-connected inverters are commonly used in systems of renewable energy to convert this energy source into AC power with parameters suitable for connection to the grid. In the normal operating conditions, the grid-connected inverters mainly generate active power to the grid. However, when a voltage sag or voltage imbalance occurs, the grid voltage imbalance in the conventional control methods causes negative sequence components and increases the output current magnitude of inverters. The increase of current can damage power semiconductor devices. This paper presents a strategy to limit the current magnitude of inverters under unbalanced grid voltage conditions. In this strategy, a multiple-complex-coefficient filter is used to eliminate the negative sequence voltage components. This method does not require any additional hardware. A three-phase gridconnected photovoltaic inverter system using a solar array of 20 kWp is also used for the survey. The effectiveness has been validated when comparing the simulation results on Matlab/Simulink of the proposed method with those of the conventional method.

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“…In [20], the closed-loop control of the grid-connected inverters is studied to improve the current quality and active power filtering in the distribution system. In spite of the nonideal waveform of the grid voltage, the developed controller is able to compensate nonlinear and harmonic components of the local load.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Modeling and Closed-loop Control of Hybrid Grid-connected Renewable Energy System with Multi-input Multi-output Controller

Salimi

Radmand

Firouz

2021

Journal of Modern Power Systems and Clean Energy

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In this study, a novel approach for dynamic modeling and closed-loop control of hybrid grid-connected renewable energy system with multi-input multi-output (MIMO) controller is proposed. The studied converter includes two parallel DC-DC boost converters, which are connected into the power grid through a single-phase H-bridge inverter. The proposed MIMO controller is developed for maximum power point tracking of photovoltaic (PV)/fuel-cell (FC) input power sources and output power control of the grid-connected DC-AC inverter. Considering circuit topology of the system, a unique MIMO model is proposed for the analysis of the entire system. A unique model of the system includes all of the circuit state variables in DC-DC and DC-AC converters. In fact, from the viewpoint of closed-loop controller design, the hybrid grid-connected energy system is an MIMO system. The control inputs of the system are duty cycles of the DC-DC boost converters and the amplitude modulation index of DC-AC inverters. Furthermore, the control outputs are the output power of the PV/FC input power sources as well as AC power injected into the power grid. After the development of the unique model for the entire system, a decoupling network is introduced for system input-output linearization due to inherent connection of the control outputs with all of the system inputs. Considering the decoupled model and small signal linearization, the required linear controllers are designed to adjust the outputs. Finally, to evaluate the accuracy and effectiveness of the designed controllers, the PV/FC based grid-connected system is simulated using the MATLAB/Simulink toolbox. Index Terms--Multi-input multi-output (MIMO) converter, maximum power point tracking, grid-connected inverter, conversion function matrix.

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Abc-frame complex-coefficient filter and controller based current harmonic elimination strategy for three-phase grid connected inverter

Cited by 15 publications

References 19 publications

Impact of phase-locked loop on stability of active damped LCL-filter-based grid-connected inverters with capacitor voltage feedback

Impact of phase-locked loop on stability of active damped LCL-filter-based grid-connected inverters with capacitor voltage feedback

Archives of Electrical Engineering

Dynamic Modeling and Closed-loop Control of Hybrid Grid-connected Renewable Energy System with Multi-input Multi-output Controller

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