Ied in power system

What is IED in substation automation?

IED in Substation Automation Automation in a substation is considered as the provision of new generation intelligent electronic devices (IEDs), programmable logic controllers (PLCs) and computers to monitor and communicate. It is always simple to incorporate these components in new substations at the design stage itself.

What is the importance of IED in industrial control system?

IEDs are regarded as a key part of industrial control systems used for the purpose of advanced power automation. Thus, is useful in S upervisory C ontrol A nd D ata A cquisition systems (SCADA system), D istributed C ontrol S ystems (DCS) as a crucial component.

What does an IED do?

IEDs receive data from sensors and power equipment and can issue control commands, such as tripping circuit breakers if they sense voltage, current, or frequency anomalies, or raise/lower tap positions in order to maintain the desired voltage level.

What power supply do IEDs use?

So, the acceptable power supply used by IEDs is in the range between 15 to 150 volts in the case of DC. While 110 to 140 Volts when AC. Analog Inputs: In relays, inputs are provided by the current transformer and potential transformers. However, IEDs may have sensor inputs.

What are the protection functions of an IED?

Protection The protection functions of the IED evolved from the basic overcurrent and earth fault protection functions of the feeder to more complex protection requirements in the generator system. The protection functions are typically provided in discrete function blocks, which are activated and programmed independently.

Can a new IED be added to an existing system?

The new IEDs to be added to an existing system usually require new versions of the system integration tools and, most likely, also new versions of device configuration tools. Any modification of the Substation Automation System (SAS) will much probably lead to some configuration changes in the existing IEDs.