Energy Conservation Techniques to Mitigate the Power Shortage Problem in Pakistan

Vol.1  No.2

Year: 2013

Issue: May-Jul

Title : Energy Conservation Techniques to Mitigate the Power Shortage Problem in Pakistan

Author Name : Dr. Suhail Aftab, Uzma Amin

Synopsis :

The main objective of this research paper is to show benefits of different energy conservation techniques. Different techniques are discussed in this paper and the most beneficial technique that is energy conservation by power factor improvement is analyzed in detail. As a first case study,I performed analysis on University of Gujrat, electrical power system. This case study involves analysis of motors and tube lights installed at the pumping stations and in Engineering Block of UOG respectively, with the help of energy analyzer before and after the installation of required rating capacitors. Power system analysis also done which includes power distribution system losses for example line losses and copper losses of different rating transformers of UOG. Cost and payback period calculation had been done. Cost of capacitors includes both static and automatic capacitors calculations. Second case study is performed on 11 KV Ali Park and Rachna Town feeders to show fruitful results obtained by implementing rehabilitation techniques on the above said feeders. FDRANA Software is used which is capable of calculating voltage drop, power losses and KVARS required for improving the power factor. The results showed by adopting energy conservation techniques not only energy is conserved, it also brings other benefits.

Sag/Swell and Load Reactive Power Compensation

Vol.1  No.2

Year: 2013

Issue: May-Jul

Title : Sag/Swell and Load Reactive Power Compensation

Author Name : B.Suresh kumar, B.Veeresalingam , praveena praveena

Synopsis :

This paper Introduces, a new concept of controlling complex power (simultaneous active and reactive powers) through series inverter of UPQC is introduced and named as UPQC-S. The proposed concept of the UPQC-S approach is mathematically formulated and analyzed for voltage sag and swell conditions. The developed comprehensive equations for UPQC-S can be utilized to estimate the required series injection voltage and the shunt compensating current profiles (magnitude and phase angle), and the overall VA loading both under voltage sag and swell conditions.The simulation studies demonstrate the effectiveness of the proposed concept of simultaneous voltage sag/swell and load reactive power sharing feature of series part of UPQC-S. The significant advantages of UPQC-S over general UPQC applications are:1) the multifunction ability of series inverter to compensate voltage variation (sag, swell, etc.) while supporting load reactive power; 2) better utilization of series inverter rating of UPQC; and 3) reduction in the shunt inverter rating due to the reactive power sharing by both the inverters.The UPQC apparatus is a good compensation system if wide installation of shunt units is needed. An increase in the percentage of the protected load enhances the voltage stabilization interval over which the UPQC can significantly improve the power quality.

Automatic Generation Control Schemes in Interconnected Power System: A Critical survey

Vol.1  No.2

Year: 2013

Issue: May-Jul

Title : Automatic Generation Control Schemes in Interconnected Power System: A Critical survey

Author Name : Gopi Pasala

Synopsis :

The load frequency control problem is non interactive mainly due to small load variations in power system. Maintaining power system frequency at constant value is very important for the health of the power generating equipment and the utilization equipment at the customer end. The job of automatic frequency regulation is achieved by governing systems of individual turbine-generators and Automatic Generation Control or Load frequency control system of the power system. The main objective of this paper is to present a critical literature review and aimed to highlight the various control and structural aspects of Automatic Generation Control used in multi area interconnected power system. Also this paper work reported in the Automatic Generation Control schemes based on power system models and control strategies are reviewed.

Remnant Life Estimation Of Power Transformers Using Fuzzy Logic

Vol.1  No.2

Year: 2013

Issue: May-Jul

Title : Remnant Life Estimation Of Power Transformers Using Fuzzy Logic

Author Name : Satyaprakash Ram, Ashwani Chandel

Synopsis :

Transformer failures in a power system very often lead to forced outages, blackouts and revenue losses. The power system can be run smoothly if the remnant life of the transformers is predicted accurately before such devices fail to perform. The remnant life estimation gives a flexible decision on replacement or relocation of power transformers. These devices are the connecting links between transmission and distribution end. The lifetime of the power transformer is mainly associated to the insulation system condition. In the present work experimental data obtained by conducting dissolve gas analysis, moisture content, breakdown voltage, interfacial tension, furan compounds and dielectric dissipation factor or tan delta on the various power transformers of Himachal State Electricity Board has been utilized to develop the proposed remnant life estimation model. The proposed Fuzzy logic model utilizes the MATLAB graphical user interface tool to interpret the life expectancy of the power transformers very accurately.

Hybrid Active Power Filter Design for 3-Phase, 4-wire System for Different Loads to Enhance Power Quality Using PSO

Vol.1  No.2

Year: 2013

Issue: May-Jul

Title : Hybrid Active Power Filter Design for 3-Phase, 4-wire System for Different Loads to Enhance Power Quality Using PSO

Author Name : praveena praveena, B.Suresh kumar , K.P. Krishna Prasad

Synopsis :

This paper proposes an optimal design method for an hybrid active power filters (HAPFs) set at high voltage levels to satisfy the requirements of Harmonic filtering, Power factor correction and reactive power compensation for Different Loads to Enhance Power Quality Using PSO [16]-[19]. Multi objective Optimization models for HAPF were constructed. Detuning effects and faults were also considered by constructing Constraints during the optimal process, which improved the reliability and practicability of the designed filters. Furthermore, the Particle swarm optimization algorithm was developed for searching an optimal solution of planning of filters.

Wind And Solar Energy Sources Scheduling With Thermal Unit In Deregulated Power System

Vol. 1 No. 1

Year: 2013

 
Issue: Feb-Apr

Title : Wind And Solar Energy Sources Scheduling With Thermal Unit In Deregulated Power System

Author Name : K. Karthickkumar, K.Lakshmi , S.Vasantharathna

Synopsis :

Renewable energy sources have attracted wide attention because of being abundant in nature and nearly non pollutant. Wind power is one of the most promising clean energy sources it can easily be captured by wind generators with high power capacity. Solar power is another promising clean energy sources in global system and can be harnessed easily. Solar energy system might be compensate the wind intermittency generation resource due to lesser start up time, lower operating cost and good ramping capabilities. The generation scheduling for wind-solar energy with thermal unit system in deregulated environment, minimize the total thermal fuel cost emission and maximize the profit of generation companies, subject to many constraints. While performing the generation scheduling problem by Lagrangian relaxation based particle swarm optimization method the hourly load, wind velocity and solar radiation must be forecasted to prevent the errors. The generation scheduling formulations are involved the perspective of a generation company (GENCO). The deregulation environment is one which the generation, transmission and distribution does not depend on each other. To demonstrate the uncertainty in the proposed method the generating scheduling problem is performed in a simplified generation system.

Analysis and Design controlling parameters of UPFC System for Power Flow Management

Vol. 1 No. 1

Year: 2013

 
Issue: Feb-Apr

Title : Analysis and Design controlling parameters of UPFC System for Power Flow Management

 

Author Name : S.Subhash, M.Subash ChandraBose , P.R.Sudhiendhar , Dr.S.Sankar 

Synopsis : 

Unified power flow controller is a new concept for the compensation and effective power flow management of multi-line transmission systems. The UPFC employs a number of Voltage Sourced Converters (VSCs) linked at the same DC terminal, each of which can provide series compensation for the selected line of the transmission system. Through common dc link, any inverters within the UPFC is able to transfer real power  to any other and thereby facilitate  real power transfer among the line. In this paper the UPFC system used for power flow management at different angles. The prototype UPFC system was developed and verified with hardware results. When the voltage sag is compensated, reactive power is controlled and transmission line efficiency is improved.