Study of stability after low voltage ride-through caused by phase-locked loop of grid-side converter

2021 ◽  
Vol 129 ◽  
pp. 106765
Author(s):  
Ziqian Zhang ◽  
Robert Schuerhuber ◽  
Lothar Fickert ◽  
Katrin Friedl
Keyword(s):  
Low Voltage ◽  
Phase Locked Loop ◽  
Low Voltage Ride Through ◽  
Grid Side ◽  
Grid Side Converter

Fault Ride through of Doubly Fed Induction Generator Wind Turbine Based on Supercapacitors Energy Storage

2011 ◽  
Vol 130-134 ◽  
pp. 2851-2854
Author(s):  
He Ping Zou ◽  
Peng Yu ◽  
Hui Sun ◽  
Ji Yan Zou ◽  
Jian Liu ◽  
...  
Keyword(s):  
Energy Storage ◽  
Reactive Power ◽  
Low Voltage ◽  
Induction Generator ◽  
Doubly Fed Induction Generator ◽  
Low Voltage Ride Through ◽  
Fault Ride Through ◽  
Doubly Fed ◽  
Grid Side ◽  
Grid Side Converter

This paper proposes a low voltage ride through (LVRT) scheme of doubly fed induction generator (DFIG) based on the supercapacitors energy storage. The novel control strategy of the bi-directional converter and the grid side converter is established. Simulation model of the DFIG system is developed. Simulation results show that the presented scheme can efficiently reduce the DC-link overvoltage, supply reactive power to the power system through grid side converter, and help grid recovery under system fault, improving the LVRT capability of the system.

scholarly journals Optimal Transient Search Algorithm-Based PI Controllers for Enhancing Low Voltage Ride-Through Ability of Grid-Linked PMSG-Based Wind Turbine

Electronics ◽  
2020 ◽  
Vol 9 (11) ◽  
pp. 1807
Author(s):  
Mohammed H. Qais ◽  
Hany M. Hasanien ◽  
Saad Alghuwainem
Keyword(s):  
Wind Turbine ◽  
Low Voltage ◽  
Search Algorithm ◽  
Fitness Function ◽  
Synchronous Generator ◽  
Pi Control ◽  
Low Voltage Ride Through ◽  
Control Scheme ◽  
Pi Controllers ◽  
Grid Side

This paper depicts a new attempt to apply a novel transient search optimization (TSO) algorithm to optimally design the proportional-integral (PI) controllers. Optimal PI controllers are utilized in all converters of a grid-linked permanent magnet synchronous generator (PMSG) powered by a variable-speed wind turbine. The converters of such wind energy systems contain a generator-side converter (GSC) and a grid-side inverter (GSI). Both of these converters are optimally controlled by the proposed TSO-based PI controllers using a vector control scheme. The GSC is responsible for regulating the maximum power point, the reactive generator power, and the generator currents. In addition, the GSI is essentially controlled to control the point of common coupling (PCC) voltage, DC link voltage, and the grid currents. The TSO is applied to minimize the fitness function, which has the sum of these variables’ squared error. The optimization problem’s constraints include the range of the proportional and integral gains of the PI controllers. All the simulation studies, including the TSO code, are implemented using PSCAD software. This represents a salient and new contribution of this study, where the TSO is coded using Fortran language within PSCAD software. The TSO-PI control scheme’s effectiveness is compared with that achieved by using a recent grey wolf optimization (GWO) algorithm–PI control scheme. The validity of the proposed TSO–PI controllers is tested under several network disturbances, such as subjecting the system to balanced and unbalanced faults. With the optimal TSO–PI controller, the low voltage ride-through ability of the grid-linked PMSG can be further improved.

scholarly journals Decoupled Feed Forward Voltage Oriented Controller For DFIG Under Balanced And Unbalanced Fault Conditions

2015 ◽  
Vol 15 (2) ◽  
pp. 209
Author(s):  
Dileep Kumar Varma ◽  
Y. P. Obulesh ◽  
Ch. Sai Babu
Keyword(s):  
Wind Farm ◽  
Reactive Power ◽  
Low Voltage ◽  
Dynamic Performance ◽  
Total Power ◽  
Current Controller ◽  
Control Scheme ◽  
Grid Operators ◽  
Grid Side ◽  
Grid Side Converter

As wind power penetration increases continuously in total Power Generation, the wind turbines are necessary to stay connected to grid even under grid disturbances. An enhanced control strategy for DFIG is proposed in the present paper to meet the latest grid codes set by grid operators. The decoupled current controller implemented in grid voltage oriented reference frame is applied to Grid Side Converter (GSC) to improve the dynamic performance of DFIG. The proposed scheme enhances the Low Voltage ride through capability of Wind farm by providing reactive Power support under adverse grid conditions. The Proposed scheme also counteracts the ripples in DC Link voltage, stator/rotor currents and stator/reactive power to fulfill the grid code commitments in weak grid.Simulation results are presented to verify the feasibility and robustness of the proposed control scheme.

scholarly journals DESAIN DAN IMPLEMENTASI SYNCHRONOUS REFERENCE FRAME-PHASE LOCKED LOOP (SRF-PLL) UNTUK TEGANGAN SATU FASE MENGGUNAKAN DSPIC30F4011

TRANSIENT ◽  
2018 ◽  
Vol 7 (1) ◽  
pp. 145 ◽  
Author(s):  
Muhammad Hanif Abdurrahman ◽  
Iwan Setiawan ◽  
Susatyo Handoko
Keyword(s):  
Reference Frame ◽  
Phase Locked Loop ◽  
Synchronous Reference Frame ◽  
Grid Side ◽  
Grid Side Converter

Fase, magnitude, dan frekuensi dari tegangan listrik merupakan informasi penting dalam pengoprasian sistem jaringan. Berdasarkan kebutuhan penerapan koneksi pembangkit dengan grid side converter (GSC), GSC harus dapat dioperasikan meski pun jaringan mengalami interferensi. Untuk mencapai tujuan tersebut, dibutuhkan metode yang dapat mendeteksi gangguan jaringan secara cepat, yaitu dengan menggunakan metode Phase Locked Loop (PLL) yang dapat menyediakan informasi tegangan jaringan. Dibandingkan dengan algoritma PLL yang lainnya, Synchronous Reference Frame-Phase Locked Loop (SRF-PLL) bisa dikatakan merupakan yang paling populer dalam penerapannya. Dalam Penelitian ini, dibuat sebuah desain untuk pengaplikasian SRF-PLL untuk tegangan satu fase menggunakan mikrokontroler 16-bit dsPIC30f4011 dengan kontroler PI, dimana kontroler PI diharapkan akan membuat sistem memiliki respon yang cepat terhadap perubahan yang terjadi, dikarenakan tujuan dari kebutuhan PLL itu sendiri, sehingga akan didapatkan hasil data tegangan jaringan berupa, magnitude, frekuensi dan fase. Hasilnya, pengkondisi sinyal dapat mengatur sinyal tegangan jaringan agar dapat terabca oleh ADC mikrokontroler, sehingga magnitude, frekuensi, dan fase dari tegangan jaringan berhasil dibaca oleh algoritma SRF-PLL yang ditampilkan pada oscilloscope dengan bantuan DAC 8bit.

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