An Investigation of Grid Stability and a New Design of Adaptive Phase-Locked Loop for Wind-Integrated Weak Power Grid

Nair, Anuprabha Ravindran; Kamalasadan, Sukumar; Geis-Schroer, Johanna; Patel, Shyamal; Smith, Michael

doi:10.1109/tia.2022.3182308

Cited by 15 publications

(9 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An approach to assess grid strength considering the interaction between IRESs and corresponding shunt capacitors has been presented in [17], which shows that shunt capacitors influences static voltage stability of the grid with increased penetration of IRESs. The influence of phase locked loop parameters on grid stability while integrating wind energy systems to weak power grids has been analysed in [18]. Similar analysis on the the challenges of integration of voltage source converters (VSCs) into weak power grids by investigating the resonance between DC-link voltage control (DVC) and synchronizing control phase-locked loop (PLL) has been presented in [19].…”

Section: Introductionmentioning

confidence: 99%

Factors affecting voltage stability while integrating inverter based renewable energy sources into weak power grids

Saleem

Saha

Ang

et al. 2022

IET Generation Trans & Dist

View full text Add to dashboard Cite

With the emergence of renewable energy sources (RESs), the power grid all over the world is going through a paradigm shift. The inverter based RESs are replacing the conventional rotating synchronous generators and this trend is expected to continue in coming years. Consequently, the grid strength is decreasing, which can pose significant challenges on the grid stability, especially during integration of IRESs. This paper presents a thorough analysis on the integration challenges of IRESs in weak grids. The paper also presents a comprehensive investigation on the impacts of factors, such as available fault level at the point of interconnection (POI), feeder length and grid nature on the POI voltage, and maximum allowable power injection by IRES. This is followed by maximum allowable IRES power injection sensitivity analysis to quantify the impacts of the aforementioned factors. The paper concludes with a thorough case study on the IEEE 39-bus test system to numerically show the impact of diminishing grid strength on the integration of IRESs.

show abstract

Section: Introductionmentioning

confidence: 99%

Factors affecting voltage stability while integrating inverter based renewable energy sources into weak power grids

Saleem

Saha

Ang

et al. 2022

IET Generation Trans & Dist

View full text Add to dashboard Cite

show abstract

“…Conventional methods like Tyreus‐Luyben, Fertyl, symmetrical, and Ziegler‐Nichols are used for tuning PI gain values of the controller. Now a days, researchers are extensively using optimization techniques for optimal tuning of PI gain values as they are powerful set of tools 20 . GSA optimization is well fitted to use for nonlinear types of functions and is providing the best results compared to particle swarm optimization (PSO) and central force optimization (CFO), as the comparison is well presented in GSA 17 .…”

Section: Pi Gain Extraction Using Gsa Optimizationmentioning

confidence: 99%

Analysis of optimized phase locked loop for grid synchronization of solar PV system under grid disturbances

Jalan

Babu

2023

Circuit Theory & Apps

View full text Add to dashboard Cite

In this work, an optimal phase locked loop (PLL) is employed to estimate the fundamental grid frequency and phase angle under grid disturbances, which largely reduces the frequency and phase error. Conventional synchronous reference frame (SRF) offers considerable results for balanced grid conditions but has poor performance under grid disturbances with improper phase detection. In this regard, gravitational search algorithm (GSA)‐based optimization is utilized to optimally tune the proportional and integral (PI) gain values of conventional SRF PLL, which ensures the proper tracking of fundamental phase angle and frequency even during abnormal grid conditions, that is, voltage unbalance, frequency variations, high‐frequency harmonics, and phase variations. Further, integral square error (ISE) criteria, settling time, and overshoot are considered as objective functions to obtain the optimal value of current gain, present in the control loop of a grid‐tied solar photovoltaic (PV) system. The supremacy of the proposed work, compared to SRF and optimal SRF PLL, is tested with MATLAB®/Simulink studies and verified by dSPACE‐1104‐based hardware‐in‐loop (HIL) results for real‐time validation.

show abstract

“…The traditional PQ control based on phase-locked loop (PLL) synchronization faces many stability issues in weak grids [5,6]. And a series of improved control strategies have been proposed by analysing the instability mechanism of converters, including improving the structure of PLL [7,8] or the inner control loop [9,10]. For example, the work in [7] proposes an adaptive gain scheduling PI-based PLL architecture by investigating the impact of proportional and integral gain constants of the PLL on stability and oscillation characteristics under weak grids.…”

Section: Introductionmentioning

confidence: 99%

“…And a series of improved control strategies have been proposed by analysing the instability mechanism of converters, including improving the structure of PLL [7,8] or the inner control loop [9,10]. For example, the work in [7] proposes an adaptive gain scheduling PI-based PLL architecture by investigating the impact of proportional and integral gain constants of the PLL on stability and oscillation characteristics under weak grids. To suppress the oscillation that coursed by PLL, a mixed H 2 /H ∞ robust damping controller is proposed and designed for the doubly-fed induction generator (DFIG) [9].…”

Section: Introductionmentioning

confidence: 99%

“…Considering the interaction of current-loop and PLL in weak grid [7,8], it is necessary to propose a novel control strategy of DFIG that can operate without PLL. To improve the stability of dc-link voltage control under weak grid, a virtual synchronous control which utilizes the dynamics of the dc-link capacitor to realize self-synchronization is proposed for voltagesource converters [32].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Stability analysis of DFIG controlled by hybrid synchronization mode and its improved control strategy under weak grid

Xie

Mengjie

Yang

et al. 2023

IET Renewable Power Gen

View full text Add to dashboard Cite

In order to improve the stability of doubly‐fed induction generator (DFIG)‐based wind turbines under weak grid, previous works have proposed the power synchronization control strategy in the rotor side converter (RSC). However, the potential instability risk of dc‐link voltage control in the grid side converter (GSC) has been neglected. Here, DFIG with power synchronization and phase‐locked synchronization for RSC and GSC respectively, is called as hybrid synchronization mode (HSM)‐controlled DFIG and, the full‐order state space model of HSM‐controlled DFIG are established. Eigenvalue and participation factor analysis shows that the HSM‐controlled DFIG is unstable under extremely weak grid due to the interaction of phase‐locked loop (PLL) and current‐loop in GSC. Furthermore, dominant pole analysis indicates that the HSM‐controlled DFIG exhibits weak damping at the AC side in strong grid. To enhance the stability of HSM‐controlled DFIG under extremely weak grid, an improved hybrid synchronization control strategy is proposed. The improved control strategy utilizes active power and dc‐link voltage to achieve PLL‐free operation of DFIG. The effects of the parameters in dc‐link voltage synchronous loop on control bandwidth, system stability and dynamic coupling are analysed. Finally, the validity of the theoretical analysis is investigated with experiments based on 2MW control‐hardware‐in‐loop platform.

show abstract

An Investigation of Grid Stability and a New Design of Adaptive Phase-Locked Loop for Wind-Integrated Weak Power Grid

Cited by 15 publications

References 36 publications

Factors affecting voltage stability while integrating inverter based renewable energy sources into weak power grids

Factors affecting voltage stability while integrating inverter based renewable energy sources into weak power grids

Analysis of optimized phase locked loop for grid synchronization of solar PV system under grid disturbances

Stability analysis of DFIG controlled by hybrid synchronization mode and its improved control strategy under weak grid

Contact Info

Product

Resources

About