What is an Intelligent Electronic Device?
Substation Automation Architecture | Source: General Electric |
The term Intelligent Electronic Device or an IED refers to a broad definition of any electronic device that possesses intelligent function in substation automation. The term came into existence to describe a device that has versatile electrical protection functions, advanced local control intelligence, monitoring abilities, and the capability of extensive communications directly to a SCADA system.
The functions of a typical IED can be classified into five main areas, namely:
- Protection
- Control
- Monitoring
- Metering
- Communications
Some IEDs may be more advanced than others, and some may emphasize certain functional aspects over others, but these main functionalities should be incorporated to a greater or lesser degree.
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.
The following is a guideline of protection-related functions that may be expected from
the most advanced IED's:
- Non-directional earth fault protection (low-set, high-set and instantaneous function blocks)
- Directional three-phase overcurrent (low-set, high-set and instantaneous function blocks, with low-set selectable as long time-, normal-, very-, or extremely inverse, or definite time)
- Directional earth fault protection (low-set, high-set and instantaneous function blocks)
- Phase discontinuity protection
- Three-phase overvoltage protection
- Residual overvoltage protection
- Three-phase undervoltage protection
- Three-phase transformer inrush/motor start-up current detector
- Auto-reclosure function
- Under frequency protection
- Over frequency protection
- Synchro-check function
- hree-phase thermal overload protection.
Control
The control function includes a local and remote control and is fully programmable.
- Local and remote control of up to twelve switching objects (open/close commands for circuit breakers, isolators, etc.)
- Control sequencing
- Bay level interlocking of the controlled devices such as status information and information of alarm channels
- HMI panel on the device.
Monitoring
Monitoring of the following functions
- Circuit-breaker condition monitoring, including operation time counter, electric wear, breaker travel time, scheduled maintenance
- Trip circuit supervision
- Internal self-supervision
- Gas density monitoring (for SF6 switchgear)
- Event recording
- Other monitoring functions, like auxiliary power, relay temperature, etc.
Metering
IED Metering may include the following:
- Three-phase currents
- Neutral current
- Three-phase voltages
- Residual voltage
- Frequency
- Active power
- Reactive power
- Power factor
- Energy
- Harmonics
- Transient disturbance recorder
Communication
The communication capability of an IED is one of the most important aspects of modern
electrical and protection systems, and is the one aspect that clearly separates the different
manufacturers’ devices from one another regarding their level of functionality.
Modern substation automation uses IEC 61850 to harmonize all IED and other components in the system.
IEC Network Interface |
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.
"To automate the substation, it is important that an engineer know how to do data modeling as defined by IEC 61850".
whose stockpile of electronic instruments and exceptionally constructed gadgetry most of us could just have longed for, regardless of whether we could comprehend the coordinations of their working.high voltage ceramic capacitor
ReplyDeleteTo my psyche, this was the start of another age. To make electronic music, it was not, at this point important to approach a roomful of innovation in a studio or live. Heretofore, this was exclusively the area of craftsmen any semblance of Kraftwerk, China mosfet manufacturer
ReplyDeleteThese organizations are called Retail Electric Providers. Also, your bill currently appears to be unique than charges you have gotten before, however each Retail Electric Provider gives a similar standard data. power MOSFET
ReplyDeleteHaving the right gear can represent the moment of truth you. https://once-tech.com/flat-screen-printing-machine/
ReplyDeleteIt is a great website.. The Design looks very good.. Keep working like that!. circuit board repairs
ReplyDeleteHoward Gardner, a professor and psychologist at Harvard has recently proposed a theory of multiple intelligences. He has considered nine types of intelligence including linguistic, musical and existential intelligence. emotional intelligence
ReplyDeleteThank you again for all the knowledge you distribute,Good post. I was very interested in the article, it's quite inspiring I should admit. I like visiting you site since I always come across interesting articles like this one.Great Job, I greatly appreciate that.Do Keep sharing! Regards, more info
ReplyDeleteI wanted to thank you for this excellent read!! I definitely loved every little bit of it. I have you bookmarked your site to check out the new stuff you post. printed circuit board repairs
ReplyDeleteWhat a fantabulous post this has been. Never seen this kind of useful post. I am grateful to you and expect more number of posts like these. Thank you very much. keep it up it's time to must know about it best family road trip vehicle for more details.
ReplyDeleteVery nice blog and articles. I am realy very happy to visit your blog. Now I am found which I actually want. I check your blog everyday and try to learn something from your blog. Thank you and waiting for your new post. it's time to avail this Airport car services in Detroit for more details.
ReplyDeleteToday, this 'other common' assemblage of sound which started near a century prior, may presently don't seem odd and extraordinary as new ages have acknowledged quite a bit of it as standard, yet it's had a rough street and, in tracking down mass crowd acknowledgment, a sluggish one buy real twitch followers
ReplyDeleteThanks again for the article post. Thanks Again. Really Great.
ReplyDeleteChina equivalent mosfet
On this subject internet page, you'll see my best information, be sure to look over this level of detail. Printed Circuit Board
ReplyDeleteThanks for this great post, i find it very interesting and very well thought out and put together. I look forward to reading your work in the future. hower standing handle
ReplyDeleteJai_balamurugan_sir
ReplyDeleteVery useful info. Hope to see more posts soon!. It’s time to avail this Metro Car Detroit for more details.
ReplyDeleteI just found this blog and have high hopes for it to continue. Keep up the great work, its hard to find good ones. I have added to my favorites. Thank You. resistor
ReplyDeleteFantastic Blog!Car Plate Valuation
ReplyDeleteAll the contents you mentioned in post is too good and can be very useful. I will keep it in mind, thanks for sharing the information keep updating, looking forward for more posts.Thanks hft5000 12 6 0 sp
ReplyDeleteBe that as it may, genuine capacitors have some spillage flow which go through the dielectric between the two plates. 高压陶瓷电容
ReplyDeleteJoining renovations that succeed the appearance of your home will take care of over the long haul. This article will zero in on the cellar and how this region can really add appeal to a home.howmuch
ReplyDeleteI read this article. This is really meant to me. I appreciate for your informational article. Thanks for shearing. best 43 inch led tv in india
ReplyDeleteIn view of your spending plan, you can choose from a huge or little air conditioning framework.
ReplyDeleteducted heating installation melbourne
Aside from visual contamination a portion of the parts and parts of the electronics, for instance cathode beam tubes, contain destructive substances like lead which in the event that left erratically in the climate might find their direction into human utilization prompting sick impacts on wellbeing.
ReplyDeleteSigav
Just review your article post. Got this post very useful. Apps Cre8ve delivers outstanding e-commerce app development services in Florida. Our proficient mobile app developers create innovative, user-friendly, and scalable applications tailored to enhance your online business and enrich customer interactions.
ReplyDelete