DC‐link current estimation for load‐side converter of brushless doubly‐fed generator in the current feed‐forward control

Wang, Xingwei; Lin, Heyun

doi:10.1049/iet-pel.2015.0910

Cited by 16 publications

(3 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Wang and Lin deduced and analyzed the harmonic characteristics of single-phase two-level voltage rectifier in detail. Although only the harmonics of single-phase rectifier were deduced, the theory of power balance of converter used by Wang and Lin still had important reference significance for the study of harmonics of S-phase rectifier [11][12]. Pichan et al proposed a new control strategy of machine-side converter for stator current containing a large number of harmonics in permanent magnet motor.…”

Section: ⅱ Iterature Reviewmentioning

confidence: 99%

Harmonics of Double-fed Wind Power System with Grid-Tied Dual-PWM Converter

He¹

2020

International Journal of Circuits, Systems and Signal Processing

View full text Add to dashboard Cite

To fill the gaps of the double-fed wind power system, this paper conducts a study for the scarcity and integration of social resources. The LF harmonics on the DC and grid sides are surveyed based on the double Fourier transform algorithm, in conjunction with the power balance theory. A study model has also been built herein. The findings show that the calculated values of the HF harmonic components in the DFIG rotor current almost coincide with the simulation results, regardless of whether the wind velocity is 7 m/s or 19 m/s. When the three-phase voltage of the grid is unbalanced, the stator current contains the grid side basebands with LF harmonics of odd times, among which, the fundamental frequency of triple grid side baseband is the most distinct. It is thus clear that the simulation can capture relevant voltage and current data for the wind power system running in the balance and unbalanced states of grid voltages. it is therefore proved that the theoretical analysis is accurate and reliable.

show abstract

Section: ⅱ Iterature Reviewmentioning

confidence: 99%

Harmonics of Double-fed Wind Power System with Grid-Tied Dual-PWM Converter

He¹

2020

International Journal of Circuits, Systems and Signal Processing

View full text Add to dashboard Cite

show abstract

“…Brushless doubly fed electric generators without brushes and slip rings have superior characteristics, including low maintenance costs and high reliability [1][2][3][4][5][6]. Many scholars and scientific research institutions have studied this topic in the past few years [7][8][9][10][11]. Studies show that these generators outperform conventional brush-geared doubly fed induction generators (DFIGs) in the field of wind power generation [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Optimal Control of Brushless Doubly Fed Wind Power Generator under Zero-Voltage Ride-Through

Xu,

Nie

2024

Energies

View full text Add to dashboard Cite

In the grid-connected operation dynamics of brushless doubly fed generators (BDFGs), a dip in the grid voltage is equivalent to suddenly adding a reverse voltage source at the parallel node. By deriving the expressions of the transient current of power winding (PW), control winding (CW), and rotor winding (RW) of a BDFG in the complex frequency domain under a natural state, it was concluded that the overshoot and oscillation time are affected by the CW voltage, the drop degree and phase of the grid voltage, and the rotor speed. Therefore, an optimal control strategy is proposed. A state model with the CW current as the state variable was constructed using the Pontryagin minimum principle. The finite-time integral value of the square of the electromagnetic torque was set as the objective function to achieve the minimum value that could suppress the overshoot and oscillation of the electromagnetic torque, and the optimal CW voltage command value was directly solved to accelerate the convergence of the BDFG’s physical quantities, thereby reducing the amplitude. Finally, the feasibility of the optimal control algorithm was verified using tests on an experimental platform.

show abstract

“…Brushless doubly-fed electric generators with no-slip ring have superior characteristics, including low maintenance costs and high reliability [1][2][3]. Accordingly, many scholars and scientific research institutions have studied this issue in the past few years [4,5]. More specifically, studies show that these generators outperform the conventional brush doubly fed induction generators (DFIG) in the field of wind power generation [6,7].…”

Section: Introductionmentioning

confidence: 99%

Dynamic analysis and oscillation elimination of brushless doubly fed wind power generation system during symmetrical voltage dips

Nie

Wang

Kong

2021

IET Renewable Power Gen

View full text Add to dashboard Cite

In the dynamics of grid‐connected operation of brushless doubly‐fed generators, grid voltage dips can cause the extreme imbalance between the voltage and the back electromotive forces in power winding. When these imbalances are combined with the influence of the inertia link composed of converter and generator, a serious over‐current and current oscillation forms in power winding and control winding. This paper gives a process analysis and proposes an improved control to the system during the low voltage ride through event. According to the mathematical model of the generators, the correlation between the power winding and control winding currents is established and then a fully equivalent simplified model is obtained accordingly. When the voltage suddenly drops to zero, the analytic expressions of power winding and control winding are calculated in the complex frequency domain and the influence factors of overshoot and oscillations are analyzed. The conventional control method relies on limited PI regulation that cannot eliminate the oscillations completely. It is found that after adjusting a proportional coefficient and eliminating the integral link of the control winding current controller, the order of the control system reduces. Therefore, the generation system can quickly recover to a steady state without oscillations. Finally, the analysis and improvement are verified by the simulation model and experimental results.

show abstract

DC‐link current estimation for load‐side converter of brushless doubly‐fed generator in the current feed‐forward control

Cited by 16 publications

References 29 publications

Harmonics of Double-fed Wind Power System with Grid-Tied Dual-PWM Converter

Harmonics of Double-fed Wind Power System with Grid-Tied Dual-PWM Converter

Optimal Control of Brushless Doubly Fed Wind Power Generator under Zero-Voltage Ride-Through

Dynamic analysis and oscillation elimination of brushless doubly fed wind power generation system during symmetrical voltage dips

Contact Info

Product

Resources

About