Impact of integrating large-scale DFIG-based wind energy conversion system on the voltage stability of weak national grids: A case study of the Nigerian power grid

Adetokun, Bukola Babatunde; Muriithi, Christopher Maina

doi:10.1016/j.egyr.2021.01.025

Cited by 44 publications

(19 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Considering the large distributed capacitance of cable lines in offshore wind power systems, the literature (Adetokun and Muriithi, 2021) uses a distribution parameter model with forward and reverse traveling wave amplitude ratios to determine the fault direction according to the transmission characteristics of traveling waves. The method is not only unaffected by the transient distributed capacitance current but is also applicable to offshore wind power transmission lines.…”

Section: Transmission Grid Connection and Transmissionmentioning

confidence: 99%

Transient Protection Schemes for Transmission Lines Used in Offshore Wind Farm: A State-of-the-Art Review

et al. 2022

View full text Add to dashboard Cite

The weak feeder and high harmonic characteristics of wind farms connected to the grid have an impact on the safe operation of the system, especially on the action selectivity and reliability of the traditional work-frequency quantity protection, which makes the transient protection of wind farms become a hot direction of wind power development and research. In this article, the key technologies of transient protection for offshore wind farm transmission lines are reviewed, including the analysis of the fault characteristics of wind farm transmission lines based on two types of wind turbines (i.e., doubly fed asynchronous wind turbines and direct-drive permanent magnet synchronous generators), while the comparison with the characteristics of ground faults and short-circuit faults in traditional synchronous power systems as well as the current status of research on transient protection for offshore wind farm transmission lines, upon which the protection of wind farm transmission lines is also discussed.

show abstract

Section: Transmission Grid Connection and Transmissionmentioning

confidence: 99%

Transient Protection Schemes for Transmission Lines Used in Offshore Wind Farm: A State-of-the-Art Review

et al. 2022

View full text Add to dashboard Cite

show abstract

“…1 . Detailed parameters of the system have been provided in 51 . The data obtained from the Transmission Company of Nigeria (TCN) and the Fichtner’s report on transmission expansion plan contained in 52 indicate that the gross total installed power generation capacity is about 13,300 MW with a net capacity of 11,800 MW.…”

Section: Current Status Of the Nigerian National Grid And The Solar Energy Potentialsmentioning

confidence: 99%

Application of large-scale grid-connected solar photovoltaic system for voltage stability improvement of weak national grids

Adetokun

Ojo

Muriithi

2021

Sci Rep

Self Cite

View full text Add to dashboard Cite

This paper investigates the application of large-scale solar photovoltaic (SPV) system for voltage stability improvement of weak national grids. Large-scale SPV integration has been investigated on the Nigerian power system to enhance voltage stability and as a viable alternative to the aged shunt reactors currently being used in the Nigerian national grid to mitigate overvoltage issues in Northern Nigeria. Two scenarios of increasing SPV penetration level (PL) are investigated in this work, namely, centralized large-scale SPV at the critical bus and dispersed large-scale SPV across the weak buses. The voltage stability of the system is evaluated using the active power margin (APM) also called megawatt margin (MWM) derived from Active Power–Voltage (P–V) analysis, the reactive power margin (RPM) and the associated critical voltage–reactive power ratio (CVQR) index obtained from Reactive Power–Voltage (Q–V) analysis. All simulations are carried out in DIgSILENT PowerFactory software and result analyses done with MATLAB. The results show that with centralized SPV generation for the case study system, the highest bus voltage is able to fall within acceptable limits at 26.29% (1000 MW), while the dispersed SPV achieves this at 21.44% (800 MW). Also, the dispersed SPV scenario provides better voltage stability improvement for the system as indicated by the MWM, RPM and the CVQR index of the system. Therefore, this work provides a baseline insight on the potential application of large-scale SPV in weak grids such as the Nigerian case to address the voltage stability problems in the power system while utilizing the abundant solar resource to meet the increasing energy demand.

show abstract

“…STATCOM and SVC are the two most selections to regulate voltage, control of reactive power and damping oscillations in the synchronous generators 22,23 . Several studies and research were conducted to keeping the DFIG‐based wind energy farm in service during the grid faults 24–26 . The use of FACTS devices for dynamic reactive power compensation has been extensively studied as an essential solution for the continuous operation of a DFIG wind energy farm during grid fluctuations 27,28 …”

Section: Introductionmentioning

confidence: 99%

“…22,23 Several studies and research were conducted to keeping the DFIG-based wind energy farm in service during the grid faults. [24][25][26] The use of FACTS devices for dynamic reactive power compensation has been extensively studied as an essential solution for the continuous operation of a DFIG wind energy farm during grid fluctuations. 27,28 Many conventional strategies are proposed to control FACTS devices such as PI and PID controllers.…”

mentioning

confidence: 99%

Voltage stability improvement of an Egyptian power grid‐based wind energy system using STATCOM

et al. 2022

View full text Add to dashboard Cite

The increase in electricity demand places its focus on renewable energies as sustainable energy resources. Wind energy is one of the most important green energy sources. The doubly fed induction generator (DFIG)-based wind farm has now gained prominence due to its many advantages, such as variable speed operation and autonomous control of active and reactive power. When the DFIG stator windings are directly connected to the power grid, when a grid fault occurs, some unwanted high current may be produced in the rotor windings, and the protection system will prevent the rotor side converter (RSC) from operating. Therefore, voltage stability is a significant factor in maintaining the DFIG-based wind farm in operation during grid faults and disturbances. This paper applies a static synchronous compensator (STATCOM) to restore the voltage levels of the Egyptian power grid connected to Al Zafarana-5th stage wind farm, which is made of 100 Gamesa G52/850 kW DFIG machines. In this paper, the STATCOM is controlled by a proportional integral (PI) and is compared with a STATCOM controlled by fuzzy logic control (FLC). For simulation, the MATLAB/SIMULINK environment is used. Moreover, the simulation results show that STATCOM devices with fuzzy logic controllers improve the effects of grid faults and disturbances such as a single line to ground fault, a line to line fault, voltage sag, and voltage swell as compared with STATCOM with PI controllers. Also, STATCOM devices based on FLC improve the stability and power quality of the system and the power system restoration procedures for the existing and futureplanned wind farms.

show abstract

Impact of integrating large-scale DFIG-based wind energy conversion system on the voltage stability of weak national grids: A case study of the Nigerian power grid

Cited by 44 publications

References 34 publications

Transient Protection Schemes for Transmission Lines Used in Offshore Wind Farm: A State-of-the-Art Review

Transient Protection Schemes for Transmission Lines Used in Offshore Wind Farm: A State-of-the-Art Review

Application of large-scale grid-connected solar photovoltaic system for voltage stability improvement of weak national grids

Voltage stability improvement of an Egyptian power grid‐based wind energy system using STATCOM

Contact Info

Product

Resources

About