What is power system protection and control? Power system protection is a branch of electrical power engineering that deals with the protection of electrical power systems from faults through the disconnection of faulted parts from
What is power system protection and control?
Power system protection is a branch of electrical power engineering that deals with the protection of electrical power systems from faults through the disconnection of faulted parts from the rest of the electrical network. The devices that are used to protect the power systems from faults are called protection devices.
What is meant by power system protection?
Power system protection is defined as detecting abnormal operating conditions in a power system and preventing further threats such as instability or equipment damages, by clearing the faulted part as soon as possible [8].
What is the need for power system protection?
The main objective of using power system protection is to detach the faulty section from the system to make the rest of the portion work without any disturbance. In addition to this, it is used for the protection of power system and prevent the flow of fault current.
What are the two types of protection?
It is a usual practice to divide the Types of Protection scheme into two classes viz. primary protection and back-up protection.
What is the drawback of protection system?
Disadvantages: The downside was the challenge of installing and testing such a complicated scheme with the potential for mis-operation. I don’t recall any mis-operations occurring, but it was still a bit “dicey”.
What are the basic requirements of protection?
Speed. The protective relays must operate at the required speed. There must be a correct coordination provided in various power system protection relays in such a way that for fault at one portion of the system should not disturb other healthy portion.
What are zones of protection?
“Zones of protection” is one strategy that can be used to provide the level of security demanded today. Protective relay engineers keep utility grids and equipment safe from faults and system unbalances by dividing the grid into zones, each with a unique protection scheme. Overlapping zones provide backup protection.
What is the main objective of protection?
Ensure that each object is accessed correctly and only by allowed processes.
Why is speed of protection so important?
Speed of operation is the ability of the protection system to operate in a short time after fault inception. Fast operation is important in preserving system stability, reducing equipment damage, and improving power quality.
What are the requirements of protection of lines?
The protection scheme must satisfy the following requirements: a) Under normal conditions the breakers are not tripped. b) Under fault conditions only the breakers closest to the fault on the source side are tripped. c) If the closest breaker fails to operate, the next breaker closer to the source should trip.
Which type of relay is used in substation?
Instantaneous high stability circulating current relay The modern practice is to use a voltage operated high impedance relay, set to operate at a voltage slightly higher than that developed by CT under max fault conditions. Hence this type of relay is used with a stabilizing resistor.