Contribution of FACTS Devices to the Transient Stability Improvement of a Power System Integrated with a PMSG-based Wind Turbine

The increasing penetration of wind energy to the conventional power system due to the rapid growth of energy demand has led to the consideration of different wind turbine generator technologies. In fault conditions, the frequency of the power system decreases and eventually leads to speed differences between the grid and the interconnected wind generator. This can result to power system problems such as transient instability (TS). This paper focuses on enhancing the TS of a permanent magnet synchronous generator (PMSG)-based power system during 3ph fault conditions using FACTS devices. The power system considered is connected to a large wind farm which is based on PMSG. Critical clearing time (CCT) is used as an index to evaluate the transient state of the system. Under the study of an IEEE-14 bus system using PSAT as a simulation tool, the integrated CCT with PMSG-based wind turbine is improved with three independent FACTS devices. One of the synchronous generators in the test system has been replaced at random with the PMSG-based wind turbine which is meant to generate an equivalent power. Time domain simulations (TDSs) were carried out considering four study cases. Simulation results show that the (CCT) of the system with the FACTS devices is longer than the CCT without them, which is an indication of TS improvement.

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Adaptive Armature Resistance Control of Virtual Synchronous Generators to Improve Power System Transient Stability

Energies ◽

10.3390/en13092365 ◽

2020 ◽

Vol 13 (9) ◽

pp. 2365

Author(s):

Daniel Carletti ◽

Arthur Eduardo Alves Amorim ◽

Thiago Silva Amorim ◽

Domingos Sávio Lyrio Simonetti ◽

Jussara Farias Fardin ◽

...

Keyword(s):

Adaptive Control ◽

Power System ◽

Transient Stability ◽

Short Circuit ◽

Stability Margin ◽

Synchronous Generator ◽

Synchronous Generators ◽

Resistance Change ◽

Clearing Time ◽

Fault Current Limiters

The growing number of renewable energy plants connected to the power system through static converters have been pushing the development of new strategies to ensure transient stability of these systems. The virtual synchronous generator (VSG) emerged as a way to contribute to the system stabilization by emulating the behavior of traditional synchronous machines in the power converters operation. This paper proposes a modification in the VSG implementation to improve its contribution to the power system transient stability. The proposal is based on the virtualization of the resistive superconducting fault current limiters’ (SFCL) behavior through an adaptive control that performs the VSG armature resistance change in short-circuit situations. A theoretical analysis of the problem is done based on the equal-area criterion, simulation results are obtained using PSCAD, and experimental results are obtained in a Hardware-In-the-Loop (HIL) test bench to corroborate the proposal. Results show an increase in the system transient stability margin, with an increase in the fault critical clearing time (CCT) for all virtual resistance values added by the adaptive control to the VSG operation during the short-circuit.

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Research on Effects of STATCOM on Voltage in Wind Farm Based on PSASP

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.433-435.1320 ◽

2013 ◽

Vol 433-435 ◽

pp. 1320-1324

Author(s):

Wei Zheng ◽

Shi Qun Li ◽

Yong Zhi ◽

Run Qing Bai ◽

Chen Liang ◽

...

Keyword(s):

Power System ◽

Power Flow ◽

Wind Farm ◽

Transient Stability ◽

System Analysis ◽

Transient State ◽

Gansu Province ◽

Static Synchronous Compensator ◽

Stability Calculation ◽

Power Base

Recently, the static synchronous compensator (STATCOM) device has been installed in Jiuquan wind farm in Gansu Province. To study its ability to support voltage, this paper presents a study of the mathematical model of the steady state and transient state of STATCOM and then uses the power system analysis software package (PSASP) to establish a user-defined model of STATCOM. In addition, the model is added into the power system example (CEPRI 7). After that, the power flow calculation and transient stability calculation are carried out to simulate and analyze. At last the STATCOM device is field tested in Jiuquan wind power base. Test results verify that STATCOM effectively supports the grid voltage.

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WAMS - based control of series FACTS devices installed in tie-lines of interconnected power system

Archives of Electrical Engineering ◽

10.2478/s10171-010-0010-3 ◽

2010 ◽

Vol 59 (3-4) ◽

pp. 121-140 ◽

Cited By ~ 5

Author(s):

Łukasz Nogal ◽

Jan Machowski

Keyword(s):

Power System ◽

Power Flow ◽

Transient State ◽

Test System ◽

Direct Lyapunov Method ◽

Control Laws ◽

Interconnected Power System ◽

State Variable ◽

Facts Devices ◽

Tie Lines

WAMS - based control of series FACTS devices installed in tie-lines of interconnected power systemThis paper addresses the state-variable stabilising control of the power system using such series FACTS devices as TCPAR installed in the tie-line connecting control areas in an interconnected power system. This stabilising control is activated in the transient state and is supplementary with respect to the main steady-state control designed for power flow regulation. Stabilising control laws, proposed in this paper, have been derived for a linear multi-machine system model using direct Lyapunov method with the aim to maximise the rate of energy dissipation during power swings and therefore maximisation their damping. The proposed control strategy is executed by a multi-loop controller with frequency deviations in all control areas used as the input signals. Validity of the proposed state-variable control has been confirmed by modal analysis and by computer simulation for a multi-machine test system.

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Coordinated control and parameters optimization for PSS, POD and SVC to enhance the transient stability with the integration of DFIG based wind power systems

International Journal of Emerging Electric Power Systems ◽

10.1515/ijeeps-2021-0098 ◽

2021 ◽

Vol 0 (0) ◽

Author(s):

Jawaharlal Bhukya ◽

Talada Appala Naidu ◽

Sandeep Vuddanti ◽

Charalambos Konstantinou

Keyword(s):

Power System ◽

Wind Power ◽

Wind Farm ◽

Transient Stability ◽

Parameter Tuning ◽

Test System ◽

Parameters Optimization ◽

Coordination Mechanism ◽

Three Phase ◽

Simulation Results

Abstract This paper presents stability enhancement of a test system that is connected with a Wind Farm (WF) by using Power System Stabilizer (PSS) for Synchronous Generator (SG) and Power Oscillation Damper (POD) for Static Var Compensator (SVC). This paper also proposes a coordination mechanism for the controller to effectively damp out the oscillations and make the power system more stable by considering the uncertainties. The uncertainty is considered as wind speed variation and wind power penetration and different locations. The Particle Swarm Optimization (PSO) is used to overcome the controller parameter tuning drawbacks and controller coordination. The SG rotor speed deviation is selected as an objective function with various constraints for PSO. The transient stability analysis is carried out by considering large disturbance that is a three-phase fault. The nonlinear dynamic simulation results are obtained by integrating WF and SG replacement with the same rating WF. Evaluation and analysis are performed for various cases and different combination of without and with controllers. From the simulation results, it is noticed that oscillations in the system are minimized, and stability is enhanced at the maximum level. It also observed that the capability of SG and DFIG under three-phase fault is intensified by using PSO for optimized coordinated controller parameters. The robustness and effectiveness of the proposed approaches are evaluated on the IEEE-11 bus test system.

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Enhancing the Transient State Performance of Permanent Magnet Synchronous Generator Based Variable Speed Wind Turbines Using Power Converters Excitation Parameters

Frontiers in Energy Research ◽

10.3389/fenrg.2021.655051 ◽

2021 ◽

Vol 9 ◽

Author(s):

Kenneth E. Okedu ◽

Hind Barghash

Keyword(s):

Wind Turbine ◽

Permanent Magnet ◽

Transient Stability ◽

Power Converters ◽

Wind Farms ◽

Transient State ◽

Synchronous Generator ◽

Variable Speed ◽

Permanent Magnet Synchronous Generator ◽

Excitation Parameters

One of the ways of generating electrical power from wind energy is by employing the promising technology of the permanent magnet synchronous generator (PMSG) variable speed wind turbine (VSWT). With the daily increase and integration of wind farms into traditional power grids, it is imperative to carry out transient stability studies of wind generators in wind farms, in order to fulfill the operational grid codes. To solve the transient stability intricacies posed by the stochastic nature of wind energy during transient states or grid faults, this paper presents the enhancement of PMSG wind turbine considering the excitation parameters of the insulated gate bipolar transistors (IGBTs) of the wind generator. The investigation was carried out using the turn on and turn off resistances of the IGBTs of the power converters of the PMSG wind turbine, considering different scenarios, with and without over voltage protection scheme. A severe three-line-to-ground fault was used to test the robustness and rigidity of the controllers of the wind generator during transient state. Furthermore, the results obtained using the PMSG wind turbine were compared to those using the doubly fed induction generator (DFIG) wind turbine. The evaluation of the system performance was done using the power system computer “aided” design and electromagnetic transient including DC (PSCAD/EMTDC) platform. The same conditions of operation were used in investigating the various scenarios considered in this study.

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Enhancement of Power System Transient Stability by the Coordinated Control between an Adjustable Speed Pumping Generator and Battery

Applied Sciences ◽

10.3390/app10249034 ◽

2020 ◽

Vol 10 (24) ◽

pp. 9034

Author(s):

Junji Tamura ◽

Atsushi Umemura ◽

Rion Takahashi ◽

Atsushi Sakahara ◽

Fumihito Tosaka ◽

...

Keyword(s):

Power Systems ◽

Power System ◽

Wind Farm ◽

Transient Stability ◽

Wind Farms ◽

System Stability ◽

Synchronous Generators ◽

Adjustable Speed ◽

The Stability ◽

Network Fault

The penetration level of large-scale wind farms into power systems has been increasing significantly, and the frequency stability and transient stability of the power systems during and after a network fault can be negatively affected. This paper proposes a new control method to improve the stability of power systems that are composed of large wind farms, as well as usual synchronous generators. The new method is a coordinated controlling method between an adjustable-speed pumping generator (ASG) and a battery. The coordinated system is designed to improve power system stability during a disconnection in a fixed-rotor-speed wind turbine with a squirrel cage-type induction generator (FSWT-SCIG)-based wind farm due to a network fault, in which a battery first responds quickly to the system frequency deviation due to a grid fault and improves the frequency nadir, and then the ASG starts to supply compensatory power to recover the grid frequency to the rated frequency. The performance of the proposed system was confirmed through simulation studies on a power system model consisting of usual synchronous generators (SGs), an ASG, a battery, and an SCIG-based wind farm. Simulation results demonstrated that the proposed control system can enhance the stability of the power system effectively.

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Transient Stability Enhancement of a Wind Energy Distributed Generation System by Using Fuzzy Logic Stabilizers

Wind Engineering ◽

10.1260/0309-524x.36.6.687 ◽

2012 ◽

Vol 36 (6) ◽

pp. 687-700 ◽

Cited By ~ 10

Author(s):

M. A. Ebrahim ◽

K. A. El-Metwally ◽

F. M. Bendary ◽

W. M. Mansour

Keyword(s):

Power System ◽

Wind Energy ◽

Wind Turbine ◽

Distributed Generation ◽

Transient Stability ◽

Synchronous Generator ◽

Large Power ◽

System Stabilizer ◽

Stability Enhancement ◽

Operating Points

This paper proposes a new power system stabilizer based on fuzzy systems. The new controller is applied to a wind turbine generating system comprising of a wind turbine driving a 3 - phase synchronous generator connected to a large power system. The new controller significantly improves system performance. The enhancement in the dynamic response of the system is verified through simulation results of a system under different operating points and exposed to both small and large disturbances. Extension to the wind energy distributed generation based multi-machine case is also included to illustrate the effectiveness of the proposed stabilizer in damping power system swing mode oscillations that follow disturbances.

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Transient Stability Improvement of Wind Farm Integrated Power System using STATCOM

International Journal of Engineering and Advanced Technology - Regular Issue ◽

10.35940/ijeat.f1153.0986s319 ◽

2019 ◽

Vol 8 (6S3) ◽

pp. 802-805

Keyword(s):

Renewable Energy ◽

Power System ◽

Energy Demand ◽

Wind Farm ◽

Transient Stability ◽

Renewable Energy Sources ◽

System Stability ◽

Energy Sources ◽

Continuous Growth ◽

Wind Generators

The need for Interconnected power system is increasing day by day because of continuous growth of Electrical energy demand and to transmit Electric power to remote places at minimum cost and minimum losses. With the operation of power system in interconnected manner, maintaining the system security is difficult task i.e. whenever a disturbance occurs, the system undergoes stability problems. Even though Conventional energy sources are available, Electrical Engineers prefer Renewable energy sources integration because of Energy crisis and pollution problems related to the former, one such Renewable energy source is Wind power. Wind energy has major share in Renewable energy sources because of its abundant availability in the nature. Whenever Wind generators coupled to the power system, the system exhibits drooping voltage characteristics and this situation becomes worse during faults. This condition can be neutralised with FACTS (Flexible AC transmission system) devices, one such FACTS device is STATCOM (static synchronous compensator). STATCOMsupports reactive and real power exchange and also improves Transient stability of the system because of its superior characteristics and quick response. In this paper a 9 bus Wind farm integrated test power system is taken and stability studies are done. Since, Wind farm is integrated with the system whenever a fault occurs, overall system stability is reduced i.e. the conventional synchronous generators can withstand it, whereas the Wind generators can’t. So to enhance the Transient stability of the system, a STATCOM is installed and the system behaviour is observed.

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The transient stability analysis of wind turbines interconected to grid under fault

International Journal of Electrical and Computer Engineering (IJECE) ◽

10.11591/ijece.v10i1.pp600-608 ◽

2020 ◽

Vol 10 (1) ◽

pp. 600

Author(s):

Anass Gourma ◽

Abdelmajid Berdai ◽

Moussa Reddak

Keyword(s):

Wind Turbine ◽

Power Plants ◽

Wind Farm ◽

Transient Stability ◽

Electricity Production ◽

Synchronous Generators ◽

Electricity Grid ◽

Rotor Angle ◽

The Stability ◽

The Impact

Wind farm has been growing in recent years due to its very competitive electricity production cost. Wind generators have gone from a few kilowatts to megawatts. However, the participation of the wind turbine in the stability of the electricity grid is a critical point to check, knowing that the electricity grid is meshed, any change in active and reactive flux at the network level affects its stability. With a rate of 50% wind turbine penetration into the electricity grid, the stability of the rotor angle is a dynamic phenomenon which is only visible by the variation of the active energy. The purpose of this journal is to verify the impact of wind turbine integration on an electrical grid, by exploiting the relationship between the reactive energy produced by the Doubly Fed Induction Generator equipping most wind energy systems, and the stability of the rotor angle of the synchronous generators equipping the conventional power plants in the electrical system.

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