Two Degrees of Freedom Controller Design of a Grid-Side Converter for Injecting Wind Energy Into the Grid

Memije, D.; Rodriguez, J. J.; Carranza, O.; Ortega, R.

doi:10.1109/concapan.2018.8596601

Cited by 4 publications

(4 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The linear controller gives stability to the system when the error is big [36]. In order to design it, the next two expressions, taken from [42], are used:

k_{i} = ω_{c} \sqrt{\frac{{ω_{c}}^{2} L^{2} + R^{2}}{\tan^{2} ([], P M - \frac{π}{2} + \tan^{- 1} ((), \frac{ω_{c} L}{R})) + 1}}

k_{p} = (\frac{k_{i}}{ω_{c}}) \tan [M F - \frac{π}{2} + \tan^{- 1} (\frac{ω_{c} L}{R})]

where

ω_{c}

is the crossover frequency that sets the controller speed of response, given in radians per second, and

P M

is the phase margin that sets the controller stability, given in radians.

k_{p}, k_{i}

are designed by assuming that

ω_{c} = 1000 π false[rad / s false]

P M = π / 3 [rad]

, and using the L‐filter parameters listed in Appendix .…”

Section: Super Twisting Vector Controlmentioning

confidence: 99%

“…Dc voltage and inverter currents are also processed by an ADC (see Figure 5). The phase lock loop shown in Figure 5 is the same as in [42]. A PI controller regulates the dc voltage (designed also in [42]), in which a low-pass filter (LPF) rejects the noise introduced by the ADC.…”

Section: Absolute Value Square Rootmentioning

confidence: 99%

“…The phase lock loop shown in Figure 5 is the same as in [42]. A PI controller regulates the dc voltage (designed also in [42]), in which a low-pass filter (LPF) rejects the noise introduced by the ADC. For stability reason, LPFs are not used for the currents; instead, the sampling frequency is twice the switching frequency to avoid aliasing [41].…”

Section: Absolute Value Square Rootmentioning

confidence: 99%

“…By assuming that

ζ

depend only on time, it can come out of the integral. Thus, the evaluation of Equation () yields:

U = B (\frac{k_{i}}{2} x^{T} x + k_{2} x_{1} + x^{T} \frac{d ζ}{d t})

where

{false∥ x false∥}_{1}

is the 1‐norm [42].…”

Section: Super Twisting Vector Controlmentioning

confidence: 99%

See 3 more Smart Citations

Inverter harmonic perturbations rejection in renewable energy conversion systems applying a super‐twisting algorithm

Memije

Carranza

Rodriguez

et al. 2021

IET Renewable Power Gen

View full text Add to dashboard Cite

Grid background and dead-time harmonic perturbations pose challenges in maintaining power quality and stability in the grid integration of renewable energy conversion systems. Therefore, a super-twisting algorithm with the ability to reject harmonic perturbations on three-phase grid-tied inverters is proposed. The algorithm design is related to dead-time and grid background harmonics so that robust performance is achieved under these perturbations. To highlight the advantages of the proposed algorithm, it is compared against proportional-integral (PI) control in several dead-time and grid background harmonic sweeps. The maximum inverter current distortion obtained with PI control in simulation is 15.53%. However, by using the proposed algorithm instead, the maximum current distortion is reduced to 1.8%. Dead-time is experimentally swept by using a permanent magnet motor as a harmonic-free grid. Experimental results of grid background harmonics are obtained by injecting reactive energy into a grid with 2.19% voltage distortion. When PI control is used in the experimental setup, the maximum inverter current distortion obtained is 11.4%. However, with the proposed algorithm, the maximum current distortion is reduced to 1.5%, which complies with the standard IEEE 1547-2018. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

show abstract

“…The linear controller gives stability to the system when the error is big [36]. In order to design it, the next two expressions, taken from [42], are used: