The Flexibility in Power System with High Photovoltaic Penetration into Extra-High Voltage Level

2020 ◽  
pp. 165-202
Author(s):  
S. Impram ◽  
S. Varbak Neşe ◽  
B. Oral
Keyword(s):  
Power System ◽  
High Voltage ◽  
Voltage Level ◽  
Extra High Voltage

Possibility of Four-Phase Grids Application in Russian Power System

2015 ◽  
Vol 799-800 ◽  
pp. 1206-1210
Author(s):  
Dmitry I. Bliznyuk ◽  
Alexandra I. Khalyasmaa
Keyword(s):  
Economic Analysis ◽  
Power System ◽  
Simulation Model ◽  
Russian Federation ◽  
High Voltage ◽  
Power Grid ◽  
Operation And Maintenance ◽  
Electrical Grids ◽  
United Power System ◽  
Extra High Voltage

This paper is devoted to four-phase electrical grids of high and extra-high voltage, principles of its formation and its possible operation and maintenance in united power system of Russia. Development of new simulation model of four-phase power grid for further realization in software is under consideration. Special attention is given to compliance with present both technical and economical requirements of this model in Russian Federation. Economic analysis of four-phase power system applying is done by means of comparison of different kinds of transmission Ural – Siberia.

scholarly journals Modelling and Design of a Low-Level Turn-to-Turn Fault Protection Scheme for Extra-High Voltage Magnetically Controlled Shunt Reactor

Energies ◽  
2019 ◽  
Vol 12 (24) ◽  
pp. 4628
Author(s):  
M. Asghar Khan ◽  
Tao Zheng
Keyword(s):  
Power System ◽  
High Voltage ◽  
Main Idea ◽  
Magnitude Comparison ◽  
Shunt Reactor ◽  
Low Level ◽  
Protection Scheme ◽  
System Protection ◽  
Controlled Shunt Reactor ◽  
Extra High Voltage

The objective of this paper is to model and design a low-level turn-to-turn fault (T2TF) protection scheme for a magnetically controlled shunt reactor (MCSR), during incipient stage under 10% to 100% operating capacity. Due to the structural and functional differences of all the three windings in extra-high voltage (EHV) MCSR, a separate mechanism of detecting a T2TF in each winding is necessary. For this purpose, a detailed mathematical and structural analysis of the model is performed, and a comprehensive protection scheme based on the internal changes in magnetic and electric parameters of the windings is formulated to detect 3% T2TF in power windings (PWs), control windings (CtrWs), compensation windings (CpWs), and to differentiate it from other abnormalities. The main idea of the scheme is to perform the currents magnitude comparison of respective winding with the predefined settings values and decide necessary action. The proposed scheme is also capable of identifying the faulty winding along with faulty phase. The scheme is tested under different operating capacities (10%, 50%, 100%), and other types of unusual conditions, i.e., direct energization, pre-excited energization, power regulation, internal and external faults. The results demonstrate the effectiveness of the proposed scheme. The work of this paper is applicable in the areas of power system transmission and power system protection. The simulations are carried out on MATLAB/Simulink-based models.

Research of Lightning Over-Voltage and Simulation Program of Substation Based on EMTP

2013 ◽  
Vol 441 ◽  
pp. 318-323
Author(s):  
Wei Chen ◽  
Shao Ping Zhou ◽  
He Chen ◽  
Xiao Long Luo ◽  
You Ping Fan
Keyword(s):  
Power System ◽  
High Voltage ◽  
Electrical Power ◽  
Simulation Program ◽  
Lightning Strike ◽  
Electrical Power System ◽  
Voltage Level ◽  
Data Format ◽  
Grounding Resistance ◽  
System Operating

High voltage substation is the junction station of electrical power system. In order to conduct lightning over-voltage simulation and analysation of couple of substations rapidly and intuitively, a serialization supposed simulation program of substation is developed based on the research of EMTP kernel and data format. Model of impulse grounding resistance and improved leader progression is included in the program, which enhance the accuracy as much as possible and satisfying the demand for emulation of different type and voltage level. Through the simulation of some 500kV high voltage substation, the influence to lightning over-voltage of different system operating plan and lightning strike spots is analyzed, which verifies the validity and convenience of the program.

scholarly journals Voltage Collapse Optimization for the Iraqi Extra High Voltage 400 kV Grid based on Particle Swarm Optimization

2017 ◽  
Vol 13 (1) ◽  
pp. 17-31
Author(s):  
Wafaa Saeed ◽  
Layth Tawfeeq
Keyword(s):  
Particle Swarm Optimization ◽  
Power System ◽  
High Voltage ◽  
Voltage Stability ◽  
Optimization Technique ◽  
Active Power ◽  
Voltage Collapse ◽  
Control Variables ◽  
Swarm Optimization ◽  
Extra High Voltage

The continuously ever-growing demand for the electrical power causing the continuous expansion and complexity of power systems, environmental and economic factors forcing the system to work near the critical limits of stability, so research's stability have become research areas worthy of attention in the resent day. The present work includes two phases: The first one is to determine the Voltage Stability Index for the more insensitive load bus to the voltage collapse in an interconnected power system using fast analyzed method based on separate voltage and current for PQ buses from these of PV buses, while the second phase is to suggested a simulated optimization technique for optimal voltage stability profile all around the power system. The optimization technique is used to adjust the control variables elements: Generator voltage magnitude, active power of PV buses, VAR of shunt capacitor banks and the position of transformers tap with satisfied the limit of the state variables (load voltages, generator reactive power and the active power of the slack bus). These control variables are main effect on the voltage stability profile to reach the peak prospect voltage stable loading with acceptable voltage profile. An optimized voltage collapse based on Particle Swarm Optimization has been tested on both of the IEEE 6 bus system and the Iraqi Extra High Voltage 400 kV Grid 28 bus. To ensure the effectiveness of the optimization technique a comparison between the stability indexes for load buses before and after technical application are presented. Simulation results have been executed using Matlab software.

NEW APPROACHES TO IMPROVE EDUCATIONAL AND RESEARCH CAD OF HIGH AND EXTRA-HIGH VOLTAGE OVERHEAD TRANSMISSIONS LINES

2018 ◽  
Author(s):  
Валентин Горин ◽  
Valentin Gorin ◽  
Николай Давидсон ◽  
Nikolay Davidson ◽  
Р. Пуриши ◽  
...  
Keyword(s):  
High Voltage ◽  
New Approaches ◽  
Extra High Voltage
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