scholarly journals Voltage Profile Enhancing Using HVDC for 132KV Power System: Kurdistan Case Study

2022 ◽  
Vol 28 (1) ◽  
pp. 52-64
Author(s):  
Truska Khalid Mohammed Salih ◽  
Zozan Saadallah Hussain ◽  
Firas Saaduldeen Ahmed
Keyword(s):  
Power Systems ◽  
Power System ◽  
Transmission Lines ◽  
Flow Simulation ◽  
Electrical Energy ◽  
Load Flow ◽  
Voltage Profile ◽  
High Voltage Direct Current ◽  
Power System Performance

Nowadays power systems are huge networks that consist of electrical energy sources, static and lumped load components, connected over long distances by A.C. transmission lines. Voltage improvement is an important aspect of the power system. If the issue is not dealt with properly, may lead to voltage collapse.  In this paper, HVDC links/bipolar connections were inserted in a power system in order to improve the voltage profile. The load flow was simulated by Electrical Transient Analyzer Program (ETAP.16) program in which Newton- Raphson method is used. The load flow simulation studies show a significant enhancement of the power system performance after applying HVDC links on Kurdistan power systems. The bus voltages are significantly increased after connecting High Voltage Direct Current.

scholarly journals Integrating Greenhouse Gas Emissions Costs in Lifecycle Loss Evaluations: A Case Study for Transmission Lines

2013 ◽  
Vol 2013 ◽  
pp. 1-6
Author(s):  
Antonis L. Lazari ◽  
Charalambos A. Charalambous
Keyword(s):  
Power Systems ◽  
Transmission Line ◽  
Transmission Lines ◽  
Evaluation Method ◽  
Energy Savings ◽  
Electrical Energy ◽  
Low Loss ◽  
Enhanced Transmission ◽  
Investment Volume

Considering the investment volume in the electrical energy infrastructure and the increasing awareness for global warming and climate change, this paper aims to deliver an enhanced transmission line losses evaluation method that integrates true environment financial figures. The enormous volume of transmission lines utilized in power systems across the world provides a considerable potential for energy savings by adopting the idea of “energy-efficient transmission lines.” In this paper the total owning cost (TOC) formula with built-in environmental components is used to assess the relative economic benefit of a high-first-cost, low-loss transmission line unit versus one with a lower first cost and higher losses. The proposed methodology is applied on the Cyprus Power System, by incorporating true financial data and system characteristics.

scholarly journals Load Flow Analysis in Hybrid AC-DC Transmission Network

2021 ◽  
pp. 617-624
Author(s):  
Ajith M ◽  
Dr. R. Rajeswari
Keyword(s):  
Power Systems ◽  
Power System ◽  
Transmission Lines ◽  
Power Flow ◽  
Reactive Power ◽  
Short Circuit ◽  
Flow Analysis ◽  
Load Flow ◽  
System Stability ◽  
And Control

Power-flow studies are of great significance in planning and designing the future expansion of power systems as well as in determining the best operation of existing systems. Technologies such as renewables and power electronics are aiding in power conversion and control, thus making the power system massive, complex, and dynamic. HVDC is being preferred due to limitations in HVAC such as reactive power loss, stability, current carrying capacity, operation and control. The HVDC system is being used for bulk power transmission over long distances with minimum losses using overhead transmission lines or submarine cable crossings. Recent years have witnessed an unprecedented growth in the number of the HVDC projects. Due to the vast size and inaccessibility of transmission systems, real time testing can prove to be difficult. Thus analyzing power system stability through computer modeling and simulation proves to be a viable solution in this case. The motivation of this project is to construct and analyze the load flow and short circuit behavior in an IEEE 14 bus power system with DC link using MATLAB software. This involves determining the parameters for converter transformer, rectifier, inverter and DC cable for modelling the DC link. The line chosen for incorporation of DC link is a weak bus. This project gives the results of load flow and along with comparison of reactive power flow, system losses, voltage in an AC and an AC-DC system.

scholarly journals Shunt Compensaton of the Integrated Nigeria’s 330KV Transimission Grid System

2020 ◽  
Vol 5 (9) ◽  
pp. 537-540
Author(s):  
Engr. Obi, Fortunatus Uche ◽  
Aghara, Jachimma ◽  
Prof. Atuchukwu John
Keyword(s):  
Power System ◽  
Transmission Lines ◽  
Power Flow ◽  
Research Work ◽  
Load Flow ◽  
Sudden Increase ◽  
Grid System ◽  
Voltage Profile ◽  
Contingency Analysis ◽  
Shunt Compensation

The Nigerian Power system is complex and dynamic, as a result of this it is characterized by frequent faults and outages resulting to none steady supply of power to the teaming consumers. This has great effect on the activities and mode of living of Nigerians. The research work was carried out on contingency analysis on the existing integrated 330KV Nigeria grid system and to carry out a shunt compensation on the violated buses, the shutdown of Eket-Ibom line being the case study so as to determine the following; uncertainties and effects of changes in the power system, to recognize limitations that can affect the power reliability and minimize the sudden increase or decrease in the voltage profile of the buses through shunt compensation of buses. Determine tolerable voltages and thermal violation of +5% and -5% of base voltage 330 KV (0.95-1.05) PU and to determine the critical nature and importance of some buses. This is aimed at bridging the gap of proposing further expansion of the grid system which is not only limited by huge sum of finance and difficulties in finding right – of- way for new lines but also which faces the challenges of fixed land and longtime of construction. The data of the network was gotten and modeled. The power flow and contingency analysis of the integrated Nigeria power system of 51 buses (consisting of 16 generators and 35 loads) and 73 transmission lines were carried out using Newton-Raphson Load Flow (NRLF) method in Matlab environment, simulated with PSAT software. Shunt compensation of the weak buses were done using Static Var Compensator (SVC) with Thyristor Controlled Reactor- Fixed capacitor (TCR-FC) technique. Results obtained showed that the average voltage for base simulation was 326.25KV, contingency 323.67KV and compensation was 322.37 KV. Voltage violations for lower limit were observed at Itu as 309KV and Eket as 306.81 KV while violations for upper limit were recorded at Damaturu as 352.85KV, Yola as 353.62 KV, Gombe as 355.98KV, and Jos as 342.97 KV. However after shunt compensation there were improvements for the violations at lower limits and that of higher limit were drastically brought down as recorded below: Damaturu 329.93 KV, Jos 330 KV, Eket 327.2 KV, Gombe 333.55KV, Itu 330KV, and Yola 330.52KV

scholarly journals Impact Analysis of 220 Kv And 400 Kv Transmission Lines on The Integrated Nepal Power System

2020 ◽  
Vol 2 (1) ◽  
pp. 75-80
Author(s):  
Ganesh Bhandari ◽  
Bishal Rimal ◽  
Sandeep Neupane
Keyword(s):  
Power System ◽  
Transmission Line ◽  
Transmission Lines ◽  
Impact Analysis ◽  
Flow Analysis ◽  
Load Flow ◽  
Active Power ◽  
Total System ◽  
Voltage Profile ◽  
The Impact

 Power is an essential requirement for the economic development of any country. To maintain the generation of electric power at an adequate level the power has to be transmitted in a proper form to the consumer. For determination of line losses, voltage profiles and expansion of system, load flow analysis is most essential tools. This paper deals with the impact analysis of new 220 kV and 400 kV lines on Interconnected Nepal Power System (132 kV grid) in Electrical Transient Analyzer Program (ETAP). It represents the present scenario of the power system of Nepal and their impact analysis. Load flow result of existing 132 kV line shows that there is about 44.56 MW active power losses in the transmission line before any compensation techniques. After the Optimal Capacitor Placement, in the existing transmission line the active power loss decreases to about 34.224 MW as well as the voltage profile at each bus improves. The load flow result of the under construction 220 kV and 400 kV lines on the existing line shows that the total system loss would decrease to about 27.445 MW with the voltage profile improvement. The simulated model, result and analysis are presented in this paper.

Optimization of the Mongolia Backbone Electric Grid Development

2021 ◽  
pp. 58-66
Author(s):  
Pavel S. DRACHEV ◽  
◽  
Veniamin V. KHANAEV ◽  
Bayar BAT-ERDENE ◽  
◽  
...  
Keyword(s):  
Power Systems ◽  
Power System ◽  
Transmission Lines ◽  
Flow Distribution ◽  
Load Flow ◽  
Electric Power System ◽  
Power Lines ◽  
Electric Grid ◽  
Electric Network ◽  
Significant Length

The central electric power system of Mongolia is characterized by a disjointed structure of its generating capacities, the existence of isolated "islanded" power systems, a significant length of inter-area transmission lines, and the availability of links with the power systems of Russia and China. The article discusses the current state and prospects for the development of the Central Power System of Mongolia. The long-term development of the power system requires multi-scenario studies and optimization calculations, which require dedicated mathematical models. An optimization mathematical model of the electric network has been developed, which is based on determining the minimum discounted costs for the construction and operation of new power lines subject to conditions and constraints relating for electricity generation and consumers. By using the optimization model, the development of the power system's backbone electric grid for the period up to 2030 is analyzed. The need of the Mongolian power industry for construction of six backbone power lines that will make it possible to unite the country's isolated power systems and optimize the load flow distribution in the network is pointed out. The correctness of the obtained results is confirmed by modeling and conducting comparative calculations of the electric network in the RastrWin software package.

scholarly journals Wind integrated power system to reduce emission: An application of Bat algorithm

2021 ◽  
pp. 1-9 ◽  
Author(s):  
B. Venkateswara Rao ◽  
Ramesh Devarapalli ◽  
H. Malik ◽  
Sravana Kumar Bali ◽  
Fausto Pedro García Márquez ◽  
...  
Keyword(s):  
Power Systems ◽  
Power System ◽  
Power Plants ◽  
Optimal Parameter ◽  
Electrical Power ◽  
Bat Algorithm ◽  
Voltage Profile ◽  
Electrical Power Systems ◽  
Generation Cost ◽  
Automation Technology

The trend of increasing demand creates a gap between generation and load in the field of electrical power systems. This is one of the significant problems for the science, where it require to add new generating units or use of novel automation technology for the better utilization of the existing generating units. The automation technology highly recommends the use of speedy and effective algorithms in optimal parameter adjustment for the system components. So newly developed nature inspired Bat Algorithm (BA) applied to discover the control parameters. In this scenario, this paper considers the minimization of real power generation cost with emission as an objective. Further, to improve the power system performance and reduction in the emission, two of the thermal plants were replaced with wind power plants. In addition, to boost the voltage profile, Static VAR Compensator (SVC) has been integrated. The proposed case study, i.e., considering wind plant and SVC with BA, is applied on the IEEE30 bus system. Due to the incorporation of wind plants into the system, the emission output is reduced, and with the application of SVC voltage profile improved.

scholarly journals Electric Field Analysis of High Voltage Insulators

2012 ◽  
pp. 59-63
Author(s):  
Rahul Krishnan ◽  
Subhajit Samanta ◽  
Sudha R ◽  
K Govardhan
Keyword(s):  
Electric Field ◽  
Power Systems ◽  
Transmission Lines ◽  
Field Analysis ◽  
Voltage Profile ◽  
Element Analysis ◽  
Body Angle ◽  
Long Rod ◽  
Multiple Materials ◽  
Electric Field Analysis

This paper involves designing and applying electric field analysis on multiple long rod insulators. Quality HV insulators are an integral part of power systems because they separate the Transmission lines carrying high voltages from the grounded poles. They must have the ability to withstand both high electrical and mechanical stress. So for this purpose modeling of long rod insulator was done with multiple materials such as ceramic, porcelain, and fiber glass and silicon rubber. Electric field analysis can be used to determine voltage profile of each material which in turn can be used to determine how much electrical stress the material can undertake. An attempt was made to model existing long rod insulator designs using software like Solidworks. Subsequently modifications were made to the design by changing parameters such as diameter of the insulator body, angle made by insulator cups etc. These models were then subjected to electric field analysis using finite element analysis software such as Elecnet or Comsol Multiphysics in order to identify the points where maximum electric field stress exists. Further modifications were made on order to reduce and equalize the electric field over the insulator surface.

scholarly journals Enhancement of Power Transfer Capacity and Transmission Efficiency using SSSC

2020 ◽  
Vol 9 (3) ◽  
pp. 2846-2850
Keyword(s):  
Power System ◽  
Transmission Lines ◽  
Carrying Capacity ◽  
Comparative Investigation ◽  
Transmission Efficiency ◽  
Power Demand ◽  
Voltage Profile ◽  
Facts Devices ◽  
Load Demand ◽  
Viable Solution

The power demand is increasing globally at a higher rate than the possible increase in the generation. The increased demand requierements put additional burdon on the existing transmission lines and sometimes burdoned beyond their power carrying capacities. Increase in power demand either due modernization of power system, industrialization leads to congestion problem and abruptly affects the stable and reliable operation of power system. Redesign and reconstruction of power system according to load requirements everytime is not an economical and viable solution. Other possible solution to the problem is use of FACTS devices. The use of FACTS devices the problems like increase in load demand, high losses in transmission line and dip in receiving end voltage can be eliminated or easily tackeled. In this paper, Static Synchronous Series Compensator as one of FACTS device has been used for improvement of voltage profile of different buses and power carrying capacity of the transmission lines. The main objective of this paper is to make a comparative investigation between compensated and uncompensated power system in terms of enhancement of power carrying capacity with low losses and improvement of voltage profiles of buses in the transmission network. The performance of uncompensated power system has been compared with compensated power system with the use of MATLAB/ Simulink software.

scholarly journals L-Index Based Weak Area Identification of IEEE 118 Bus System using Dynamic Simulation in PSS®E

2019 ◽  
Vol 9 (2) ◽  
pp. 613-617
Keyword(s):  
Dynamic Simulation ◽  
Transmission Lines ◽  
Flow Simulation ◽  
Fixed Number ◽  
Load Flow ◽  
System Stability ◽  
Clearing Time ◽  
Ieee Standard ◽  
Synchronous Condensers ◽  
Bus System

Voltage stability is a relevant part of power system stability analysis ever since many voltage collapse incidences have occurred at different regions of the world. In this paper we take up IEEE 118 bus system as it represents a close approximation of standard Grid system. This IEEE 118-bus system has fixed number of predefined generators, synchronous condensers, transmission lines, transformers and loads. In this work IEEE 118 bus system is simulated and load flow simulation is computed using the software PSS®E. The weak buses of the IEEE standard 118 bus network are predicted with the help of L-Index Algorithm in MATLAB. Further dynamic simulation is also performed in the weak buses obtained from L-Index as it opens up scope of more detail analysis of the system. An initial transient disturbance is then introduced in the weak buses and then the resultant maximum frequency deviation and the recovery time of the voltage is computed which finally helps to detect the weak areas in the transmission network. Further Critical Clearing time of the weakest bus is also computed.

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