i-manager's Journal on Power Systems Engineering (JPS)


Volume 7 Issue 4 November - January 2020

Research Paper

Development of AI Controllers for Smooth Operation of WDFIG Under Symmetrical & Unsymmetrical Faults

Debirupa Hore*
School of Engineering, Ajeenkya DY Patil University, Pune, Maharashtra, India.
Hore, D. (2020). Development of AI Controllers for Smooth Operation of WDFIG Under Symmetrical & Unsymmetrical Faults. i-manager’s Journal on Power Systems Engineering, 7(4), 1-13. https://doi.org/10.26634/jps.7.4.16962

Abstract

This paper proposes a design of artificial intelligence (AI) based active and reactive power controller in rotor side converter (RSC) and voltage controller in Grid side converter (GSC) to improve the performance of vector controlled wind turbine driven especially during symmetrical fault conditions. The design and training parameters of the two types of AI based controllers are presented along with the aid of hysteresis current controlled (HCC) PWM technique. The design methodology provided in this system controls the d and q axis rotor currents in stator flux oriented reference frame to control the stator reactive and active power. The conventional PI controllers were then replaced by ANN and ANFIS controllers successively and the performance were observed and compared. It has been observed that the controllers efficiently reduces the transients in rotor currents, generated active power and generator speed and maintains stability by providing reactive power requirement to the grid during fault without using any external hardware device. The use of intelligent controllers reduces complex calculation and ensures smooth operation of DFIG during dynamic conditions. The entire model is simulated in MATLAB/Simulink environment.

Research Paper

Reduce Voltage Sag in Distribution System using Fuzzy Logic Controller based Dynamic Voltage Restorer (DVR)

Anjanaa Dhritlahre* , Anu G. Pillai **
* Department of Power System Engineering, Sri Sankaracharya Technical Campus-SSGI, Bhilal, Chhattisgarh, India.
** Department of Electrical Engineering, Sri Sankaracharya Technical Campus-SSGI, and Chhattisgarh Sri Vivekanand Technical University, Bhilal, Chhattisgarh, India.
Dhritlahre, A., and Pillai, A. G. (2020). Reduce Voltage Sag in Distribution System using Fuzzy Logic Controller based Dynamic Voltage Restorer (DVR). i-manager’s Journal on Power Systems Engineering, 7(4), 14-21. https://doi.org/10.26634/jps.7.4.17438

Abstract

Power quality is an extensive term to describe the effectiveness and its performances. The main task of power system is to provide their customer a continuity power supply forever, because the whole power system is a big network which includes different types of loads. At the instant of common coupling, connected sensitive loads in which voltage distortion in supply side or load side is highly repellent. Voltage dip is the most frequently arising power quality issue mainly occuring in distribution system due to faults, connecting nonlinear loads, since it is a main disturbance for domestic and industrial equipment. In this paper to diminish the voltage drop, fuzzy logic controller based dynamic voltage restorer is used in three-phase parallel distribution system. The Fuzzy logic controller is used to manage the DVR output. The performance evolution and result is simulated using MATLAB/SIMULINK. The Fuzzy control rule is optimized using Gaussian membership function by applying if-then rule.

Research Paper

UPFC for Mitigation of Voltage Sag and Swell in Power System

Lakshmi Chuncha* , Shekhappa G. Ankaliki **
*-** Department of Electrical & Electronics Engineering, SDM College of Engineering and Technology, Dharwad, Karnataka, India.
Chuncha, L., and Ankaliki, S. G. (2020). UPFC for Mitigation of Voltage Sag and Swell in Power System. i-manager’s Journal on Power Systems Engineering, 7(4), 22-28. https://doi.org/10.26634/jps.7.4.17505

Abstract

This paper presents the use of Unified Power Flow Controller (UPFC) for mitigation of voltage sag and swell in power system. The power quality issues such as voltage fluctuations, power frequency variations, harmonics, voltage sag and swell, noise, etc., causes low power issue, low potency, enlarged losses in transmission and distribution lines, failure of electrical equipment and interference weakness with communication system. It is important to mitigate these reactive current parts and harmonic, which is done by Active Power filters. Also, voltage in all buses may not be same due to changes in load. To resolve the above issues UPFC device is used in this work. UPFC is one of the types of FACTS devices which are very useful in voltage compensation. UPFC is a three-phase device, with a combination of series and shunt active power filter with common DC link. It is employed to eliminate voltage swell and sag compensation in power system, current harmonics, compensate reactive power etc. In this paper, MATLAB (SIMULINK) based UPFC simulation model is developed and analyzed for voltage swell and sag compensation in distribution system.

Research Paper

Increasing the Power Transfer Capability of Existing EHVAC Lines using Simultaneous AC-DC Transmission

Sunil Kumar Jilledi* , Shalini J**
* Department of Electrical and Electronics Engineering, Eritrea Institute of Technology, Eritrea.
** Dairy Engineering, Sri Venkateswara Veterinary University, India.
Jilledi, S. K., and Shalini, J. (2020). Increasing the Power Transfer Capability of Existing EHVAC Lines using Simultaneous AC-DC Transmission. i-manager’s Journal on Power Systems Engineering, 7(4), 29-36. https://doi.org/10.26634/jps.7.4.17385

Abstract

It is difficult to load long extra-high voltage (EHV) AC lines to their thermal limits as a sufficient margin is kept against transient instability. In the model proposed in this the paper, it will be feasible to load these lines near to their thermal permissible limits. This paper gives us the feasibility of converting a double circuit AC line into composite AC–DC power transmission line, without constructing a separate DC line, to get the advantages of parallel AC–DC transmission for improving stability and loadability of a transmission line. There is no need for the alteration of conductors, insulator strings, and towers. An analytical model is established for the loadability and transient stability analysis of the simultaneous ACDC transmission system. The validation of these models is carried out by comparing the results obtained from the application of the models with already published results. Simulation has been carried out in MATLAB software package. Both loadability and stability models are also applied to a realistic system. The benefits of the simultaneous AC-DC system are evaluated and the results are critically discussed.

Review Paper

Review on Synchrophasor based Data Mining Techniques and Tools

M. P. Yanagimath* , Shekhappa G. Ankaliki **
* Department of Electrical and Electronics Engineering, Hirasugar Institute of Technology, Nidasoshi, Karnataka, India.
** Department of Electrical and Electronics Engineering, SDM College of Engineering & Technology, Dharwad, Karnataka, India.
Yanagimath, M. P., and Ankaliki, S. G. (2020). Review on Synchrophasor based Data Mining Techniques and Tools. i-manager’s Journal on Power Systems Engineering, 7(4), 37-44. https://doi.org/10.26634/jps.7.4.17084

Abstract

Present day power system is moving towards Smart Grid for more reliable, secure and economic operation. Data mining is the process of turning raw data into some useful information. Data mining is necessary as more number of PMU's added into the nations Power grid generates huge data which is necessary to take actionable insights. In this paper we are discussing state of art related to data mining techniques, present big data architecture and software languages and tools that facilitate data mining to power system.