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.

scholarly journals Modelling and Simulation of SCADA and PLC System for Power System Protection Laboratory

2021 ◽  
Vol 17 (1) ◽  
pp. 19-25
Author(s):  
Ayesha Faryal ◽  
Farhana Umer ◽  
Muhammad Amjad ◽  
Zeeshan Rashid ◽  
Aoun Muhammad
Keyword(s):  
Control System ◽  
Power System ◽  
High Speed ◽  
Power System Protection ◽  
Protection Scheme ◽  
Intelligent Decision Making ◽  
System Protection ◽  
Scada System ◽  
Ground Fault ◽  
Intelligent Decision

Abstract The protection of power system is an essential trait in a huge network to efficiently detect and isolate the sections undergoing faults or abnormal behaviour. The key components of a protection scheme include circuit breakers, relays, switchgears and fuses which employ communication from one station to another to achieve high-speed tripping. The automation of these components at the laboratory level using programmable logic controller (PLC) along with supervisory control and data acquisition (SCADA) system owns paramount importance for intelligent decision making, sensing, actuating, monitoring and maintaining the record in the host server. This paper discusses such a technique for conventional power system protection laboratory at a new level of development to promote a control system through PLC and SCADA. The control system has indication of over and under values of voltage, load and frequency, which can trigger malfunctioning of equipment and must be rectified. Furthermore, ground fault and inverse current indication are added to the system for monitoring and controlling purposes. The proposed system enhances the efficiency and safety of the expensive equipment and the personnel to the next level and also introduces new standards of automated protection schemes for modern technical institutes.

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 Up-Gradation of Power System Protection Scheme through TCP/IP Using GUI in MATLAB/Simulink

2012 ◽  
Vol 23 (1) ◽  
pp. 21-36
Author(s):  
Mohammad Ali Mohammad Ali
Keyword(s):  
User Interface ◽  
Power System ◽  
Power System Protection ◽  
Design Requirement ◽  
Direct Communication ◽  
Matlab Simulink ◽  
Protection Scheme ◽  
System Protection ◽  
Control Signals ◽  
Protection Devices

The paper is concerned with the Power System Protection schemes and the resulting design requirement that enhances stability as well as control with the implementation of TCP/IP. It discusses the architecture that upgrades the existing scheme by controlling all the control signals traffic between generating units, transmission system, connected loads and protection devices that are sensitive to control signals using TCP/IP and results are compared using Graphics User Interface (GUI) in MATLAB/Simulink. Protection system describes latest breakers circuit using indirect tripping command from generating units that protects load side through load breakers that receives action signal from local controllers that have a direct communication linkage with main server having strong data base, directly monitors everything through TCP/IP platform using GUI.

Cotrolling Characteristic Analysis of Magnetically Controlled Shunt Reactor Based on Field-Circuit Coupled

2013 ◽  
Vol 860-863 ◽  
pp. 2236-2239
Author(s):  
Jun Qiang Xing ◽  
Lei Chen ◽  
Zuo Xia Xing
Keyword(s):  
Finite Element ◽  
High Voltage ◽  
Transmission Lines ◽  
Demonstration Project ◽  
Characteristic Analysis ◽  
Harmonic Current ◽  
Shunt Reactor ◽  
Controlled Shunt Reactor ◽  
Ac Transmission ◽  
Shunt Reactors

In order to restrict over-voltage and compensate line charging power, there is a need to install high compensation shunt reactors in ultra-high voltage AC transmission lines. Due to the saturation characteristic of core limb during the working progress in the magnetically controlled shunt reactor (MCSR), the current higher harmonics exist in the high voltage winding. Based on finite element, the method which analyzes the controlling characteristic of high voltage winding with 500kV MCSR demonstration project in the Jiangling converter station is presented in this paper. The magnitude and frequency of harmonic current in the high voltage winding current is derived by this method. Through the comparison with the measured results of 500kV MCSR, the validity of method is proved.

scholarly journals Fault Analysis and Design of a Protection System for a Mesh Power System with a Co-Axial HTS Power Cable

Energies ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 220 ◽  
Author(s):  
Thai-Thanh Nguyen ◽  
Woon-Gyu Lee ◽  
Hak-Man Kim ◽  
Hyung Yang
Keyword(s):  
Power System ◽  
Fault Analysis ◽  
Protection System ◽  
Power Cable ◽  
Analysis And Design ◽  
Protection Scheme ◽  
System Protection ◽  
Protection Systems ◽  
Overcurrent Relays ◽  
System Characteristics

The uses of high-temperature superconducting (HTS) cables pose a challenge of power system protection since the impedance of the HTS cable is varied during fault conditions. The protection systems should be designed properly to ensure the reliability and stability of the whole system. This paper presents a fault analysis of the co-axial HTS cable in the mesh system and proposes a coordinated protection system. In the proposed protection system, the main protection is the differential current relay whereas the backup protections are the overcurrent and directional overcurrent relays. The normal and abnormal relay operations are considered to analyze the transient fault current in the HTS cable and evaluate the performance of the proposed coordinated protection system. Characteristics of cable impedances and temperatures under various fault conditions are presented. The proposed protection scheme is validated by the simulation in the PSCAD/EMTDC program. Simulation results show that the coordinated protection scheme could successfully protect the HTS cables in both normal and abnormal relay operations.

Special Protection Schemes: A Survey and Vision for the Future

2016 ◽  
Vol 839 ◽  
pp. 49-53 ◽  
Author(s):  
K. Shafeeque Ahmed ◽  
Shanmugam Prabhakar Karthikeyan ◽  
Sarat Kumar Sahoo
Keyword(s):  
Power System ◽  
Power Grid ◽  
General Structure ◽  
Power Grids ◽  
Human Beings ◽  
Protection Scheme ◽  
System Protection ◽  
System Integrity ◽  
Integrity Protection ◽  
Special Protection

Any power system network is subjected to disturbances at any time and place. It is considered as one of the most stochastic system ever seen by the human beings. To enhance the power system reliability, System Protection Scheme (SPS) is an effective tool for utilizing the power grid during rare contingencies. This method is often employed as secondary protection schemes. SPS is also termed as Special Protection Scheme. SPS is referred with different names by different users such as IEEE as System Integrity Protection Scheme (SIPS), Bonneville Power Administration (BPA) as Remedial Action Scheme (RAS) and WECC and others as SPS. In India, only in late 90s, the concept of SPS was introduced to solve the above problem. In Indian power grid different SPS has been designed and implemented successfully. This paper presents a complete knowledge, need , general structure, characteristics and a brief description of the major SPS employed in various Indian Power grids. Post - commissioning performance of these SPS has also been analyzed briefly. Finally, highlights of major issues involved with the employment of SPS in the Indian scenario.

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