A DQ Synchronous Reference Frame Current Control for Single-Phase Converters

Miranda, U.; Aredes, Maurício; Rolim, L.G.B.

doi:10.1109/pesc.2005.1581809

Cited by 123 publications

(46 citation statements)

References 7 publications

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“…This current control technique also consists in obtaining the voltage reference (var*) from a PI applied to the grid current error, however, this PI is applied in the dq0 referential [8]. Taking into account that the variables are in the dq0 referential, it is possible to obtain zero stead-state error.…”

Section: Proportional-integral In Synchronous Framementioning

confidence: 99%

See 1 more Smart Citation

Comprehensive Analysis and Comparison of Digital Current Control Techniques for Active Rectifiers

Monteiro

Ferreira

Pedrosa

et al. 2016

Lecture Notes in Electrical Engineering

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Section: Proportional-integral In Synchronous Framementioning

confidence: 99%

“…On the other hand, the most common digital current techniques are: digital PI in stationary frame, digital PI in synchronous frame, and feedforward [8,9,10]. More recently, sliding mode and predictive have gained more importance for power electronics converters (e.g., active rectifiers) [11,12,13].…”

Section: Introductionmentioning

confidence: 99%

Comprehensive Analysis and Comparison of Digital Current Control Techniques for Active Rectifiers

Monteiro

Ferreira

Pedrosa

et al. 2016

Lecture Notes in Electrical Engineering

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“…In other words, the scaling error does not cause the distortion in the estimated grid angle and estimated grid frequency but affects the estimated grid voltage amplitude related to the synchronous q-axis voltage. It only relates to the feedforward term at the output of the current controller [14]. Therefore, this paper is considered to reduce the only dc offset error.…”

Section: D-q Srf Pll In Grid Voltage Measurementmentioning

confidence: 99%

“…However, estimated grid frequency and synchronous dq-axis voltages have the same ripples with the grid frequency. It is very difficult to filter them out using an extremely low bandwidth [14].…”

Section: Introductionmentioning

confidence: 99%

Improved DC Offset Error Compensation Algorithm in Phase Locked Loop System

Park¹,

Jung²

2016

Journal of Electrical Engineering and Technology

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-This paper proposes a dc error compensation algorithm using dq-synchronous coordinate transform digital phase-locked-loop in single-phase grid-connected converters. The dc errors are caused by analog to digital conversion and grid voltage during measurement. If the dc offset error is included in the phase-locked-loop system, it can cause distortion in the grid angle estimation with phase-locked-loop. Accordingly, recent study has dealt with the integral technique using the synchronous reference frame phase-locked-loop method. However, dynamic response is slow because it requires to monitor one period of grid voltage. In this paper, the dc offset error compensation algorithm of the improved response characteristic is proposed by using the synchronous reference frame phase-locked-loop. The simulation and the experimental results are presented to demonstrate the effectiveness of the proposed dc offset error compensation algorithm.

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“…In [11] and [12], the DQ transformation methods applied in single-phase grid-tie converters control were proposed and were used to obtain the DC active and reactive power current components from the converters' output current, so that two PI controllers can be used to regulate them without zero steady-state error, respectively. However, both [11] and [12] do not mention these control system transfer functions and stability problems. In this paper, a dual-loop power control strategy for a grid-connected converter with an LCL filter is proposed to implement zero error power control based on PQ theory and its control system transfer function is derived.…”

mentioning

confidence: 99%

Dual-Loop Power Control for Single-Phase Grid-Connected Converters with LCL Filter

Peng¹,

Luo²,

Chen³

et al. 2011

Journal of Power Electronics

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Grid-connected converters have widely adopted LCL filters to acquire high harmonic suppression. However, the LCL filter increases the system order so that the design of the system stability would be complicated. Recently, sole-loop control strategies have been used for grid-connected converters with L or LC filters. But if the sole-loop control is directly transplanted to gridconnected converters with LCL filters, the systems may be unstable. This paper presents a novel dual-loop power control strategy composed of a power outer loop and a current inner loop. The outer loop regulates the grid-connected power. The inner loop improves the system stability margin and suppresses the resonant peak caused by the LCL filter. To obtain the control variables, a single-phase current detection is proposed based on PQ theory. The system transfer function is derived in detail and the influence of control gains on the system stability is analyzed with the root locus. Simulation and experimental results demonstrate the feasibility of the proposed control.

show abstract

A DQ Synchronous Reference Frame Current Control for Single-Phase Converters

Cited by 123 publications

References 7 publications

Comprehensive Analysis and Comparison of Digital Current Control Techniques for Active Rectifiers

Comprehensive Analysis and Comparison of Digital Current Control Techniques for Active Rectifiers

Improved DC Offset Error Compensation Algorithm in Phase Locked Loop System

Dual-Loop Power Control for Single-Phase Grid-Connected Converters with LCL Filter

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