Fault Diagnosis Algorithm and Protection of Electric Power Systems in an Alternative Distribution System (original) (raw)
Related papers
2015
Faults can be defined as the flow of a massive current through an improper path which could cause enormous equipment damage which will lead to interruption of power, personal injury, or death. In addition, the voltage level will alternate which can affect the equipment insulation in case of an increase or could cause a failure of equipment start-up if the voltage is below a minimum level. As a result, the electrical potential difference of the system neutral will increase. During normal operating conditions, current will flow through all elements of the electrical power system within predesigned values which are appropriate to these elements' ratings. Any power system can be analysed by calculating the system voltages & currents under normal & abnormal scenarios.
Fault Analysis in a Three-Phase System (1)
Iconic Research And Engineering Journals, 2018
Faults often occur in three-phase power systems. With the increasing demand for electrical power, one key challenge is the ability to identify and analyze these faults when they occur. In this paper, the performance of long transmission line in a balanced system has been discussed. This paper is the first in the series of four papers for fault analysis in a three-phase system. A three lines to ground (LLLG) fault occurred in the system, which automatically operated the circuit breakers and left them open. Simulink was used to view the waveforms of the current and voltage at both normal and fault conditions. The result showed that at the fault point, the sudden increase in current was accompanied by a drop in voltage. The system was also able to leave the breaker open all through the operation, suggesting the occurrence of a permanent fault.
An algorithm for faults calculation in power system
This paper presents a simple algorithm for calculation of simultaneous faults.i.e. Series and parallel faults in power system. The objective of this paper is fault calculation which provides current at fault locations as well as the current through each branch and voltage at each bus; this helps to design a good protective scheme which gives compressive and pragmatic fault analysis. The most important technique of this paper is the consideration of unequal magnitude of source e.m.f and with different phase angle to show the effect on fault analysis and protection of the system. The algorithms help to find out the different parameter to analysis the fault in simple and complicated power system.
An Overview on Detection of Temporary Fault and Permanent Fault for 3 Phase Load
International Journal for Research in Applied Science & Engineering Technology (IJRASET), 2023
To Maintain reliability in Power System it is important to protect the 3 phase devices like inductive, resistive, etc against various faults occurring in it. This fault should be identified and analysed quickly for their remedies. The Project Aim is to develops an Automatic Tripping mechanism for the three-phase system. In the case of a temporary fault, the output of the project resets automatically within second. While in event of Permanent fault condition the permanent Trip. Due to these faults, the power system may suffer from considerable damage. This can lead to disturbance in power supply and may cause a standstill to various industries linked to the system. In a three phase power system, these faults are classified as LG (Line to Ground), LL (Line to Line), 3L (Three lines). This system can overcome such problem which by sensing the fault automatically and disconnects the system from the supply so that large scale damage to the system equipment can be avoided. The system automatically differentiates between a temporary disturbance and a permanent fault and appropriately cuts the supply for a short duration or long respectively. The purpose of this project is also to send the information to the mobile by using Global system for Mobile Communication (GSM) technology.
Fault Analysis of Multiphase Distribution Systems Using Symmetrical Components
IEEE Transactions on Power Delivery, 2010
The paper presents a new approach for performing the fault analysis of multiphase distribution networks based on the symmetrical components. The multiphase distribution system is represented by an equivalent three-phase system; hence, the single-phase and two-phase line segments are represented in terms of their sequence values. The proposed technique allows the state of the art shortcircuit analysis solvers to analyze unbalanced distribution networks. The fault currents calculated using the proposed technique is compared with the phase components short-circuit analysis solver. The obtained results for the IEEE radial test feeders show that the proposed technique is accurate. Based on the proposed method, the existing commercial grade short-circuit analysis solvers based on sequence networks can be utilized for performing unbalanced distribution systems.
UNSYMMETRICAL FAULT ANALYSIS & PROTECTION OF THE EXISTING POWER SYSTEM
Now a day’s electrical power system is in the process to convert in smart power system with interconnected national and regional grids. Modeling of power system has become a necessary in order to make right decision, check for any potential problems, and fault conditions in large interconnected network. In this paper we shell deal with unsymmetrical faults in a proposed network. In recent year power system engineers shifted protection method from classical methods to digital or numerical protection techniques, in this technique high crunching capability, which has made it possible to design digital filters in real time protection system with smart technologies. Multifunctional relay also installed in modern power system network for protection of transmission line, generator protection, motor protection, real time fault location, protection of busbar and other important equipments. This paper is devoted to abnormal system behaviour under conditions of unsymmetrical fault in power system networks using MATLAB Simulation Techniques