Power and Energy Commons^™

Review Of Normal And Infrequent In-Feed Loss Risks In The Transmission System Of Oman, Omar H. Abdalla, Adil Al-Busaidi, Hilal Al-Hadi, Hisham A. Al-Riyami, Ahmed Al-Nadabi

Omar H. Abdalla

The paper presents technical studies performed to review the values of the Normal Infeed Loss Risk (NILR) and Infrequent Infeed Loss Risk (IILR) in the Transmission System Security Standard (TSSS). The objective is to facilitate the connection of the largest power station in Oman, which is Sur 2000 MW IPP, to the Main Interconnected Transmission System (MITS), while complying with the requirements of the TSSS. The full output of 2000 MW of Sur power plant is expected to available in 2015; therefore the MITS model of 2015 is used in the studies using the DIgSILENT professional software. The model includes …

Voltge & Reactive Power Control In Oman Transmission System, Omar H. Abdalla, Rashid Al-Badwawi, Hilal Al-Hadi, Hisham Al-Riyami, Ahmed Al-Nadabi, Karim Karoui, Ariadne Szekut

Omar H. Abdalla

The paper presents voltage and reactive power control in the Main Interconnected Transmission System (MITS) in the Sultanate of Oman. The objective is to improve voltage profile at substations supplying distribution companies and directly connected bulk customer. An objective function is used to maximize reactive power margin of generating units to maintain as much as possible reserves on different generators. The control parameters include existing voltage and reactive power control means, e.g. settings of generators’ excitation/AVR, transformer tap-changing, and capacitor bank switching. The constraints include operational limits of the above control devices in addition to allowable limits of busbar voltages, …

Weather-Based Ampacity Of Overhead Transmission Lines, Omar H. Abdalla, Rashid Al-Badwawi, Hilal Al-Hadi, Hisham Al-Riyami, Ahmed Al-Nadabi

Omar H. Abdalla

The paper concerns with the determination of Weather-Based Ampacity (WBA) of overhead line conductors in the Main Interconnected Transmission System (MITS) of Oman. The objective is to exploit the available capacity of existing overhead transmission lines, thus reducing investments in replacing conductors or constructing new circuits. Conductor parameters and weather data are collected to calculate the thermal rating of the of transmission lines. The weather data collected from the Directorate General of Meteorology and Air Navigation includes hourly wind speed and temperature over several years and locations in Oman. Analysis of Oman weather data has shown that there is an …

Development Of Stability Protection Framework In Oman Electricity Transmission System, Omar H. Abdalla, Thani Al-Khusaibi, Adil Al-Batashi, Anil Kumar, A. Svalovs, P. Watson, I. Svalovs

Omar H. Abdalla

Interconnection Of Oman And Uae Electric Power Systems, Omar H. Abdalla, Rashid Al-Badwawi, Hilal S. Al-Hadi, Hisham A. Al-Riyami, Ahmed Al-Nadabi, Karim Karoui, Ariadne Szekut

Omar H. Abdalla

Steady-State And Dynamic Performance Of Oman Transmission System With Diesel-Engine Driven Distributed Generation, Omar H. Abdalla, Rashid Al-Badwawi, Hilal Al-Hadi, Hisham Al-Riyami, Ahmed Al-Nadabi

Omar H. Abdalla

The paper presents simulation studies of installing a number of diesel-engine driven generating units at selected locations in the main transmission system of Oman. A total of 300MW generator units are proposed on a temporary basis to aid in meeting the peak demand in summer 2011. A digital model is developed to simulate the system including central power plants, transmission system, loads and the proposed Distributed Generation (DG). The model includes representation of governor and excitation systems. The simulation studies are performed by using the DIgSILENT PowerFacrory software package. The objective of the studies is to demonstrate effects of the …

Steady-State And Transient Performance Of Oman Transmission System With 200mw Concentrated Solar Power Plant, Omar H. Abdalla, Rashid S. Al-Badwawi, Hilal S. Al-Hadi, Hisham A. Al-Riyami, Ahmed Al-Nadabi

Omar H. Abdalla

The paper presents steady-state and transient studies to assess the impact of a 200MW Concentrated Solar Power (CSP) plant connection on the Main Interconnected Transmission System (MITS) of Oman. The CSP plant consists mainly of a solar field with parabolic trough collectors, two thermal storage tanks, heat exchangers, piping systems, steam turbine, and electric generator. Two proposed locations are considered to connect the CSP plant to MITS: Manah and Adam 132/33kV grid stations in Al-Dakhiliah region. The transmission grid model of 2015 has been updated to include the simulation of the proposed 200MW CSP at either Manah or Adam. The …

Performance Of Oman Transmission System With Distributed Generation, Omar H. Abdalla, Hilal S. Al-Hadi, Hisham A. Al-Riyami

Omar H. Abdalla

The paper presents simulation studies of installing distributed generation (DG) at a number of grid stations in the main transmission system of Oman. The diesel-engine driven generator units are required on a temporary basis to aid in meeting the peak demand. A digital model is developed to simulate the system including power plants, transmission system, loads and the proposed DG. The simulation studies are performed by using the DIgSILENT software package. The objective of the studies is to demonstrate effects of the DG in improving system performance in terms of voltage profile, line and transformer loadings, and transmission losses. The …

Modeling And Control Of A Wind Farm And Electrolyzer System Connected To An Electrical Gird, Adel A. Albaset, Omar H. Abdalla

Omar H. Abdalla

Stability Analysis Of A Unified Power Flow Controller, Omar H. Abdalla, Mohamed A. E. Ghazy, Lotfy M. Lotfy, Nermeen A. M. Hassan

Omar H. Abdalla

The paper concerns with stability analysis of a Unified Power Flow Controller (UPFC). A nonlinear model is described in the abc-reference frame and then transformed into the dq0-reference frame. The model includes shunt and series compensators of the UPFC. Stability analysis is presented first in a three-dimensional space of system parameters. A linearized model is obtained in state-space form to be used in small-signal stability studies. Effects of system parameters on stability are investigated using eigenvalue analysis. These include resistance, reactance, and modulation indices of the shunt and series components of the UPFC. Simulation results show that the stability of …

Key Performance Indicators Of A Transmission System, Omar H. Abdalla, Masoud Awlad-Thani, Mohamed Al-Wardi, Khalfan Al-Qaidi, Saqar Al-Farsi, Ibrahim Al-Balushi, Saeed Al-Mahdhoori

Omar H. Abdalla

The paper concerns with formulae and calculations of a selected group of Key Performance Indicators (KPIs) for the main electricity transmission system in Oman. These include the following service quality, reliability, security, and financial indicators [1]: &#; System Average Interruption Frequency Index (SAIFI) &#; System Average Interruption Duration Index (SAID) &#; Customer Average Interruption Duration Index (CAIDI) &#; Average Interruption Time (AIT) &#; Overhead Lines Maintenance Cost Index (OHLMCI) &#; Substation Maintenance Cost Index (SSMCI) Results of the main transmission grid in Oman, over the last 3 years, are presented. The results are useful in indicating trends of the KPIs …

Development Of A Digital Model For Oman Electrical Transmission Main Grid, Omar H. Abdalla, Hilal S. Al-Hadi, Hisham A. Al-Riyami

Omar H. Abdalla

Steady State Analysis Of Unified Power Flow Controllers, Omar H. Abdalla, Mohamed A. E. Ghazy, Lotfy M. Lotfy, Nermeen A. M. Hassan

Omar H. Abdalla

The paper presents a tutorial review of the basic operation, control functions and steady state performance of a Unified Power Flow Controller (UPFC). A typical circuit arrangement of a UPFC is given and principles of controlling active and reactive powers are described. The main functions of UPFC are analyzed; including voltage regulation, series reactive compensation, phase compensation, and combined actions. A simplified two-bus power system is considered to demonstrate the main effects of the UPFC. Studies and results are presented to show the wide range capabilities of the UPFC in controlling transmission active and reactive powers simultaneously and/or independently.

Coordinated Design Of Power System Stabilizers And Static Var Compensators In A Multimachine Power System Using Genetic Algorithms, Omar H. Abdalla, Wedad M. Refaey, Mohamed K. Saad, Gamal M. Sarhan

Omar H. Abdalla

This paper presents a procedure to coordinated design of PSSs and SVCs in a multimachine power system. The aims of the proposed method are to find the best location and the optimal parameters of these compensators in order to improve the steady state and transient performances and also to increase the system damping over a wide range of operating conditions. The objective function of the GA allows the selection of the PSSs and SVCs to shift critical closed loop eigenvalues to the left-hand side in the complex s-plane. The multimachine power system considered in this study consists of nine buses, …

Development Of Measuring And Computer Interface System For An Industrial Electrostatic Precipitator, Omar H. Abdalla, Soliman M. Sharaf, Hazem F. Feshara

Omar H. Abdalla

The paper describes the design and practical implementation of a measuring and digital computer interface system for an electrostatic precipitator (ESP) filter used in a large cement factory. The objective is to develop a digital computer control system to replace an old analog controller for the ESP filter mounted on a cement production rotary kiln inside the National Cement Company. The main concern is to develop a modern technology for a real ESP controller designed and implemented locally in Egypt. The first phase of this research project is described in this paper. The computer interface system is developed to facilitate …