Impact of PV Penetration on Short Circuit Current of Radial Distributed Feeder and Existing Power System Protection of NUST

2018 ◽  
Author(s):  
Husnain Sadiq ◽  
Usman Hameed ◽  
Muhammad Nauman rafique ◽  
Syed Ahmed Hassan Raza ◽  
Kashif Imran
Keyword(s):  
Power System ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Power System Protection ◽  
System Protection ◽  
Pv Penetration

Power Plant Station Protection System against Voltage Fluctuation

2015 ◽  
Vol 793 ◽  
pp. 65-69 ◽  
Author(s):  
Abadal Salam T. Hussain ◽  
Waleed A. Oraibi ◽  
Fadhel A. Jumaa ◽  
F. Malek ◽  
Syed F. Ahmed ◽  
...  
Keyword(s):  
Power Plant ◽  
Power System ◽  
Short Circuit ◽  
Electrical Power ◽  
Circuit Breaker ◽  
Digital Signal ◽  
Short Circuit Current ◽  
Electrical Power System ◽  
System Protection ◽  
Protective Relay

Electrical Power System protection is required to protectboth the user and the system equipment itself fromany fault, hence electrical power system is not allowed to operate without any protection devices installed. Power System fault is defined as the undesirable condition that occurs in the power system. Some of these undesirable conditions are short circuit, current leakage, ground faultand over-under voltage. With the increasing loads, voltages and short-circuit duty in power plant, over voltage protection has become more important today. Here, the component that had been used is PIC 16F877a microcontroller to control the whole system and especially on the circuit breakers as well as the LCT display unit is used to display the voltage level and type of generator that used to serve the load. Sensors are used to measure both thevoltage and the load. The controlled digital signal from PIC microcontroller is converted by using the digital analog converter to control the whole circuit. Thus a device called protective relay is created to meet this requirement. The protective relay is mostlyoften coupled with circuit breaker in a way that it can isolate the abnormal condition in the system.

Relay Protection Setting Calculation and Analysis of Auxiliary Power System for Hydropower Plants

2014 ◽  
Vol 574 ◽  
pp. 324-328
Author(s):  
Nian Fang ◽  
Xian Shan Li ◽  
Hao Xu ◽  
Yu Long Du
Keyword(s):  
Power System ◽  
Short Circuit ◽  
Relay Protection ◽  
Short Circuit Current ◽  
Hydropower Plant ◽  
System Protection ◽  
Auxiliary Power ◽  
Hydropower Plants ◽  
Actual Operation ◽  
Setting Calculation

The configuration and setting calculation of auxiliary power protection are directly related to the regular and safe operation of the equipments, thereby affecting the security and stability of the power plant. The system features are analyzed in depth according to the operational requirements of auxiliary power system protection in Xiangjiaba hydropower plant ,the system model is built on the basis of the actual project, and a variety of short-circuit current calculations are carried out. At last, the setting of the auxiliary power system relay protection is completed. This thesis also proposes solutions to the emerging problems in the process of protection setting. The results of the setting have been applied to the actual operation and no misoperation or maloperation caused by improper constant setting value has occurred so far in Xiangjiaba hydropower plant.

Generating Various Inverse Time over Current Numerical Relays Using Microcontroller for Power System Protection

2013 ◽  
Vol 415 ◽  
pp. 149-154
Author(s):  
Vinay Barhate
Keyword(s):  
Power System ◽  
Short Circuit ◽  
Circuit Breaker ◽  
Short Circuit Current ◽  
Current Sensor ◽  
Load Current ◽  
Analog To Digital ◽  
Protection Relay ◽  
System Protection ◽  
Laboratory Setup

Power System fault is defined as undesirable condition that occurs in the power system. These undesirable conditions such as short circuit, current leakage, ground short, over current and over voltage. This paper is an attempt to design and fabricate inverse time over current protection relay using basic Microcontroller. The 8051 Microcontroller will cause the circuit breaker to trip when the current from load current reaches the setting value in the micro controller and generates a time delay for tripping as per the type of Characteristics for which it is designed, may it be IDMT or normal inverse, very inverse or extremely inverse over current Relay. First the load current need to measure in order to monitor it using current sensor and when such condition arise, it will isolate in the shortest time possible without harming the any other electrical devices. The current sensor processes the signal using current to voltage converter, precision rectifier, Analog to Digital convertor, peripheral interfacing devices with Microcontroller chip takes the suitable action of generating trip signal at appropriate time for expected pick up value of current. It is tested with laboratory setup and found working satisfactory.

scholarly journals Analysis on the behavior of line differential protective relaying with solar PV penetration

2020 ◽  
Vol 20 (1) ◽  
pp. 46
Author(s):  
M. E. Yusoff ◽  
H. Hashim
Keyword(s):  
Steady State ◽  
Power System ◽  
Electrical Power ◽  
Electrical Equipment ◽  
Test System ◽  
Power System Protection ◽  
Solar Pv ◽  
Electrical Power System ◽  
System Protection ◽  
Pv Penetration

Power System Protection is very important in electrical power system as it minimizes power supply interruption to customers, and also prevents damages to electrical equipment.  Lately, renewable energy (RE) penetration in power system helps to support and fulfil the increasing demand of electricity to customers. However, the contribution of power from RE such as solar photovoltaic (PV) will increase the fault level and lead to reverse power flow; thus, it will affect power system protection reliability. This paper focuses on evaluating the reliability of differential protection relay during steady state, internal and external faults conditions when the power system is without and with solar PV penetration. Steady state and three-phase symmetrical line fault will be simulated in IEEE 39 bus test system using Power System Simulation for Engineering (PSS<sup>®</sup>E) software.

scholarly journals Power system protection

2021 ◽  
Author(s):  
Ankitkumar Naik
Keyword(s):  
Power System ◽  
Short Circuit ◽  
Selection Method ◽  
Power System Protection ◽  
System Protection ◽  
Different Types ◽  
Short Circuit Calculation ◽  
Simulation Purpose ◽  
Transmission And Distribution ◽  
Types Of Faults

This report provides review of importance of power system protection and presents different techniques available in practical situations. The material provided in this report is available online on different resources. Moreover, this report examines different types of faults in power system and discusses the consequences of the faults. Moreover, it also talks about different methods of protection schemes applied for various faults occurred on power system equipment such as transformer, generator, bus, transmission and distribution lines and motors. Furthermore, different relaying techniques are also discussed briefly which are used extensively throughout the report for explaining the importance of these techniques in fault detection and damage prevention. SKM power tool is used for simulation purpose. The simulation result are displayed and explained. Moreover, short circuit calculation and equipment selection method is also discussed in this report.

scholarly journals Power system protection

2021 ◽  
Author(s):  
Ankitkumar Naik
Keyword(s):  
Power System ◽  
Short Circuit ◽  
Selection Method ◽  
Power System Protection ◽  
System Protection ◽  
Different Types ◽  
Short Circuit Calculation ◽  
Simulation Purpose ◽  
Transmission And Distribution ◽  
Types Of Faults

This report provides review of importance of power system protection and presents different techniques available in practical situations. The material provided in this report is available online on different resources. Moreover, this report examines different types of faults in power system and discusses the consequences of the faults. Moreover, it also talks about different methods of protection schemes applied for various faults occurred on power system equipment such as transformer, generator, bus, transmission and distribution lines and motors. Furthermore, different relaying techniques are also discussed briefly which are used extensively throughout the report for explaining the importance of these techniques in fault detection and damage prevention. SKM power tool is used for simulation purpose. The simulation result are displayed and explained. Moreover, short circuit calculation and equipment selection method is also discussed in this report.

Developments in Power-System Protection

IEE Review ◽  
1989 ◽  
Vol 35 (6) ◽  
pp. 220
Author(s):  
J.H. Naylor
Keyword(s):  
Power System ◽  
Power System Protection ◽  
System Protection
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