Energy and Power
The art of load shedding and online applications in a power system under an emergency state
Load shedding is a controllable reduction of a predetermined amount of the load power consumption according to specific shedding criteria. The predetermined amount of load to be shed is traditionally… Read more
Feb 24, 2021 | By Mohamed EL-Shimy
Power Substation
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The mystery of nuisance tripping incidents in transformer protection that worry engineers
This technical article deals with transformer failure incidents due to nuisance tripping caused by various design flaws, operational conditions, or improper protection relay settings. The focus is on differential protection…...
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Feb 22, 2021 | By Salem Alshahrani
Technical Guide/Paper
Synchronous machines (generator and motor) in a nutshell
In a synchronous generator, a DC current is applied to the rotor winding, which produces a rotor magnetic field. The rotor of the generator is then turned by a prime… Read more
Feb 19, 2021 | By Edvard Csanyi
Maintenance
Troubleshooting Buchholz relay and recommended actions when it operates
This technical article provides guidance on the possible causes of Buchholz relay operation and recommends actions following the receipt of a Buchholz surge trip or gas collection alarm. It covers… Read more
Feb 15, 2021 | By Edvard Csanyi
Power Substation
Functional testing of IEC 61850 based Substation Automation Systems
Testing the protection element settings of IEDs and protection schemes are well established practices when testing a Protection, Automation and Control (PAC) system. Tools and methods are available to support… Read more
Feb 08, 2021 | By Christian B. and Eugenio C. at OMICRON
Medium Voltage
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Sizing of 110V DC charger for MV panels – Auxiliary power supply in power substations
An auxiliary DC power system that consists of a charger, battery bank, DC distribution system, and monitoring system is a critical part of the primary/secondary substation. It is directly associated…...
Premium Membership Required
This technical article/guide requires a Premium Membership. You can choose an annually based Plus, Pro, or Enterprise membership plan. Subscribe and enjoy studying specialized technical articles, online video courses, electrical engineering guides, and papers. With EEP's premium membership, you get additional essence that enhances your knowledge and experience in low- medium- and high-voltage engineering fields.Check out each plan’s benefits and choose the membership plan that works best for you or your organization.
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Feb 08, 2021 | By Bishal Lamichhane
Technical Guide/Paper
Modeling and analysis of external balanced and unbalanced faults (symmetrical components)
The analysis of three-phase AC power systems is greatly simplified if the system is assumed perfectly balanced. The three-phase system can then be modeled and analyzed on a per-phase basis… Read more
Feb 01, 2021 | By Edvard Csanyi
Maintenance
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Recommendations for the successful erection of medium voltage switchgear
Electrical engineers working on project execution know that switchgear erection brings many challenges, no matter the voltage level. The switchgear cannot always be assembled in the factory and shipped to…...
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This technical article/guide requires a Premium Membership. You can choose an annually based Plus, Pro, or Enterprise membership plan. Subscribe and enjoy studying specialized technical articles, online video courses, electrical engineering guides, and papers. With EEP's premium membership, you get additional essence that enhances your knowledge and experience in low- medium- and high-voltage engineering fields.Check out each plan’s benefits and choose the membership plan that works best for you or your organization.
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Feb 01, 2021 | By Edvard Csanyi
Power Substation
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Learn how to read and analyze control circuits of MV gas insulated switchgear (GIS)
Previously, an introductory part of the GIS and its components were discussed to pave the way for the GIS control circuits. Moreover, the single-line diagram example for a double-bus and…...
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This technical article/guide requires a Premium Membership. You can choose an annually based Plus, Pro, or Enterprise membership plan. Subscribe and enjoy studying specialized technical articles, online video courses, electrical engineering guides, and papers. With EEP's premium membership, you get additional essence that enhances your knowledge and experience in low- medium- and high-voltage engineering fields.Check out each plan’s benefits and choose the membership plan that works best for you or your organization.
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Jan 25, 2021 | By Salem Alshahrani
Energy and Power
How to measure power quality? What devices should you use and what to measure?
Measuring power quality and finding a bugbear in the network which is messing with the power are considered a highly paid job. Every electrical network and its problems with harmonics,… Read more
Jan 18, 2021 | By Edvard Csanyi
Technical Guide/Paper
Best practice guide for power transformer maintenance
Despite there being many tests available to evaluate power transformer condition, experience shows that visual inspection is very effective, and sometimes the only way, to detect certain power transformer problems…. Read more
Jan 13, 2021 | By Edvard Csanyi
Power Substation
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Mastering GIS control circuits: AC/DC auxiliary circuits and circuit breaker closing circuit
A gas-insulated substation (GIS) is usually utilized in high voltage applications in which all conductive parts are encapsulated in sealed cylinders with SF6 as the insulating medium. The air-insulated substation…...
Premium Membership Required
This technical article/guide requires a Premium Membership. You can choose an annually based Plus, Pro, or Enterprise membership plan. Subscribe and enjoy studying specialized technical articles, online video courses, electrical engineering guides, and papers. With EEP's premium membership, you get additional essence that enhances your knowledge and experience in low- medium- and high-voltage engineering fields.Check out each plan’s benefits and choose the membership plan that works best for you or your organization.
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Jan 11, 2021 | By Salem Alshahrani
Technical Guide/Paper
Transformers and equipment in underground distribution systems
The purpose of the transformer insulation resistance test is to measure the condition of a “major” insulation system – i.e., the insulation between a winding and ground (core) or between… Read more
Jan 06, 2021 | By Edvard Csanyi
Power Substation
Four ways of ensuring proper selectivity in MV/HV electrical network protection
Selectivity study of a power system is usually considered as an advanced job for advanced engineers, mostly relay protection engineers. This article will try to get close to a few… Read more
Jan 04, 2021 | By Edvard Csanyi
Technical Guide/Paper
EEP Academy Courses
Starting from the fundamentals of electricity and AC/DC circuits, you can learn three-phase power analysis, power transformers, protection & control of high voltage circuits, short-circuit analysis, substation protection, LV distribution… Read more
May 11, 2020 | By Edvard Csanyi
