The Need for Load Shedding In Generating, Transmission and Distribution Systems

Demands, Demands… The need for load shedding generally arises from unforeseen causes, lack of sufficient power supply from deficiencies in generating, transmission and distribution capabilities. These conditions may stem from unusually higher than foreseen demands that may be due to the following: Unusual seasonal changes, Special events that may cause loss of diversity, and Failure ...



via EEP - Electrical Engineering Portal http://electrical-engineering-portal.com/load-shedding-in-generating-tnd-systems

What’s the worst source of fluctuations on a power supply system?

Electric arc furnaces Electric arc furnaces are considered as being one of the worst source of fluctuations on a power supply system. The load cycles of arc furnaces vary widely, depending on size and metallurgical requirements. The first part of the cycle consists of melt-down period when the solid charge is melted and the main ...



via EEP - Electrical Engineering Portal http://electrical-engineering-portal.com/worst-source-of-fluctuations-on-a-power-supply-system

Electrical Installation Guide – New version – FREE Download Now

Designer, Consultant, Contractor, Panel buider, Facility manager, Student, teacher, Standardisation or certification person,… you all are forced to respect IEC standards daily for the security of your installations. Yet, the writings about the current regulations are complex and constantly evolving. You often encounter difficulties to put these standards into practice; you lose a lot of [...]



via Electrical engineering Community http://engineering.electrical-equipment.org/uncategorized/electrical-installation-guide-new-version-free-download-now.html

How our brains work when we are creative: The science of great ideas

Ah, ideas. Who doesn’t want more great ideas? I know I do. I usually think about ideas as being magical and hard to produce. I expect them to just show up without me cultivating them, and I often get frustrated when they don’t show up when I need them. The good news is that it [...]

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4 Motor Designs Identified In NEMA MG1

It’s all about performance… Performance requirements for various types of induction motors for use on standard sinewave power supplies are identified in NEMA MG1. Some of these types of motors are suitable for use in variable speed applications, dependent on the type of application. The purpose of this section is to provide guidance on the ...



via EEP - Electrical Engineering Portal http://electrical-engineering-portal.com/4-motor-designs-identified-in-nema-mg1

Transformer Protection

Introduction Many kinds of transformers can be found in the market which includes two winding power transformers, three windings power transformers, auto transformers, regulating transformers, earthing transformers. Depending on the use of the transformer, winding connections, earthing methods, mode of operation and other various factors, decision on the kind of protection that should be used [...]



via Electrical engineering Community http://engineering.electrical-equipment.org/electrical-distribution/transformer-protection.html

Averting the Utility Death Spiral: GE’s Idea

Some warn of an impending utility death spiral, where utility profits increasingly decline, service falters and consumers suffer. The cause? Consumers and businesses are buying less electricity because of energy efficiency. GE offers a solution in its new white paper.



via Energy Efficiency Markets http://www.energyefficiencymarkets.com/2013/10/25/averting-utility-death-spiral-ges-idea/

Siemens Completes the World's Longest and Highest-Capacity GIL Connection in China

Siemens completed the construction of a high-voltage gas-insulated transmission line (GIL) for China

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via TDWorld - Transmission & Distribution World http://tdworld.com/projects-progress/siemens-completes-worlds-longest-and-highest-capacity-gil-connection-china

An Overview Of Grounding System (Grounded)

Continued from technical article: An Overview Of Grounding System (Ungrounded) Topics covered Solidly grounded system Resistance grounded system Reason for resistance grounding System earthing at EHV level Solidly grounded system Let us assume that R phase (Phase-3 in figure-3) is shorted to ground than: If = Current through shorted path (Fault current) In = Current ...



via EEP - Electrical Engineering Portal http://electrical-engineering-portal.com/an-overview-of-grounding-system-grounded

An Overview Of Grounding System (Ungrounded)

Topics: Ungrounded system Derivation of current expression in ungrounded system Advantages & disadvantages of ungrounded system Concept of effective and non-effective grounding Coefficient of earthing and earth fault factor Underground Neutral Or Undergrounded System Before 1950 power system were often without neutral grounding. Such system had repeated arcing grounds, insulation failure and difficult earth fault ...



via EEP - Electrical Engineering Portal http://electrical-engineering-portal.com/an-overview-of-grounding-system-ungrounded

What’s Really Important When You’re Designing The Low Voltage Switchgear?

Requirements on the Switchgear Here what’s important when you’re designing the low voltage switchgear: Device Application in the Supply Circuit Short-circuit strength Release (Trip Unit) Device Application in Supply Circuits (Coupling) Device Application in the Distribution Circuit Device Application in the Final Circuit 1. Device Application in the Supply Circuit The system infeed is the ...



via EEP - Electrical Engineering Portal http://electrical-engineering-portal.com/whats-really-important-when-youre-designing-the-low-voltage-switchgear

What Is a Good Ground Resistance Value?

Zero Ohms… Not Really! The goal in ground resistance is to achieve the lowest ground resistance value possible, that makes sense economically and physically, when contacting the earth, also known as the soil/ground rod interface. Unfortunately, there is not one standard ground resistance threshold recognized by all certifying agencies. The NFPA and IEEE recommend a ...



via EEP - Electrical Engineering Portal http://electrical-engineering-portal.com/what-is-a-good-ground-resistance-value

3 Remarkable Lessons on Mental Strength from the “Marathon Monks”

In the northeastern hills outside Kyoto, Japan there is a mountain known as Mount Hiei. That mountain is littered with unmarked graves. Those graves mark the final resting place of the Tendai Buddhist monks who have failed to complete a quest known as the Kaihogyo. What is this quest that kills so many of the [...]

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Three Way Transfer Switch

Last but one part of Nasir’s tutorial on Transfer Switches. Enjoy! Introduction A Three way transfer switch is used for safe and reliable operation characteristics. Their main function is also the same as many other transfer switches, that is, to provide a continuous and uninterrupted flow of power to the load without producing any damage [...]



via Electrical engineering Community http://engineering.electrical-equipment.org/panel-building/three-way-transfer-switch.html

The Good Old Electromechanical Protective Relay

This is the first generation oldest relaying system and they have been in use for many years. They have earned a well-deserved reputation for accuracy, dependability, and reliability.



via Pocket http://electrical-engineering-portal.com/the-good-old-electromechanical-protective-relay

The Myth of Passion and Motivation: How to Stay Focused When You Get Bored Working Toward Your Goals

We all have goals and dreams, but it can be difficult to stick with them. Each week, I hear from people who say things like, “I start with good intentions, but I can’t seem to maintain my consistency for a long period of time.” Or, they will say, “I struggle with mental endurance. I get [...]

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Ferro resonance occurrence in power transformer

Introduction Ferro resonance can be described in simple terms as a disturbance caused by high voltage level leading to overvoltage and also due to distortion of overcurrent. In the process ferro resonance, all the oscillatory processes which occur in an electric circuit are included. Non-linear inductance, a capacitance, a voltage source and low losses are [...]



via Electrical engineering Community http://engineering.electrical-equipment.org/electrical-distribution/ferro-resonance-occurrence-in-power-transformer.html

SEL Expands Manufacturing Capabilities to Include Rotary Switches

Schweitzer Engineering Laboratories, Inc. has released a new rotary switch product family.

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via TDWorld - Transmission & Distribution World http://tdworld.com/test-monitor-amp-control/sel-expands-manufacturing-capabilities-include-rotary-switches

Research Trends in Power System Protection

What are the major research trends in power system protection?

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via TDWorld - Transmission & Distribution World http://tdworld.com/grill-grid-masters/research-trends-power-system-protection

Project Gallery: China Delivers Gigawatts

The Yunnan-Guangdong ±800-kV dc transmission project overcomes significant technical and design challenges to transfer 5 GW over a distance of 1,400 km.

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via TDWorld - Transmission & Distribution World http://tdworld.com/gallery/project-gallery-china-delivers-gigawatts

Hot jobs: Electrical Engineer | Democrat and Chronicle | democratandchronicle.com

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Static Transfer Switch

“Transfer switches:there types and usage”, this is how we could call Nasir’s series of tutorial for the Electrical engineering blog. Here’s the 8th part (already!) about Static Transfer Switch. Static transfer switches (STS) are such electrical devices which are used for very fast switching between electrical power sources. They perform instantaneous switching operations and thus [...]



via Electrical engineering Community http://engineering.electrical-equipment.org/panel-building/static-transfer-switch.html

Soft Loading Transfer Switch

Here’s 7th part of Nasir’s tutorial which chose to go deep into the sea of these transfer switches and study each and every type in detail, in the easiest possible way. Don’t forget, you can also send us your works, studies, tutorial, debates or even an article about your work experience A Soft Load Power [...]



via Electrical engineering Community http://engineering.electrical-equipment.org/panel-building/soft-loading-transfer-switch.html

Why We’re More Creative When We’re Tired and 9 Other Surprising Facts About How Our Brains Work

One of the things that surprises me time and time again is how we think our brains work and how they actually do. On many occasions I find myself convinced that there is a certain way to do things, only to find out that actually that’s the complete wrong way to think about it. For [...]

The post Why We’re More Creative When We’re Tired and 9 Other Surprising Facts About How Our Brains Work appeared first on The Buffer blog: productivity, life hacks, writing, user experience, customer happiness and business..

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DC Is the Answer

By Qi Da-Cai and Lu Jin-Zhuang, China Southern Power Grid Co. Ltd.

The Yunnan-Guangdong ±800-kV dc transmission project overcomes significant technical and design challenges to transfer 5 GW over a distance of 1,400 km.

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via TDWorld - Transmission & Distribution World http://tdworld.com/overhead-transmission/dc-answer

Citibank: Utilities are dinosaurs waiting to die

A new report from Citibank says the global mix of energy sources is changing faster than we thought. If the Citibank analysts are right, electric utilities that aren’t evolving with the times could lose half of their addressable market. And it’s a sooner rather than later situation.



via SmartGridNews.com http://www.smartgridnews.com/artman/publish/Business_Business_Case/Citibank-Utilities-are-dinosaurs-waiting-to-die-6086.html

Capacitor-Start (CS) Motors

Introduction A capacitor is a passive two-terminal electrical component used to store energy in an electric field. A capacitor consists of at least two electrical conductors separated by a dielectric (insulator). Electric current flows through the conductor to the dielectric creating an electric field across the dielectric. The electrical energy in the dielectric is then [...]



via Electrical engineering Community http://engineering.electrical-equipment.org/energy-efficiency-motors/capacitor-start-cs-motors.html

Protection and Control Relay Platform Provides Improved Post-Event Analysis

GE has announced the availability of the first product in its new Multilin 8 Series platform, its protection and control relay platform designed to deliver the performance and reliability required to support mission-critical electrical infrastructures.

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via TDWorld - Transmission & Distribution World http://tdworld.com/smarter-grid/protection-and-control-relay-platform-provides-improved-post-event-analysis

Starting of an induction motor

Majid, one of the members of the community sent us a testimony about an issue he faced during his work experience (internship). Let’s see what he has to tell us… Introduction There are several ways of starting an induction motor, and the most common one is the star-delta starting. The stator winding of the induction [...]



via Electrical engineering Community http://engineering.electrical-equipment.org/energy-efficiency-motors/starting-of-an-induction-motor.html

Electrical Thumb Rules-(Part-6)

Transformer Earthing Wire / Strip Size: Size of T.C or DG Body Earthing Neutral Earthing <315 KVA 25×3 mm Cu / 40×6 mm GI Strip 25×3 mm Cu Strip 315 KVA to 500 KVA 25×3 mm Cu / 40×6 mm GI Strip 25×3 mm Cu Strip 500 KVA to 750 KVA 25×3 mm Cu / […]



via Electrical Notes & Articles http://electricalnotes.wordpress.com/2013/09/05/electrical-thumb-rules-part-6/

Are Europe's utilities dying? Or can they reinvent themselves?

The EU energy sector is going through massive and disruptive changes, caused by the rapid acceleration of renewable energy deployment, decentralization, the growth of the smart grid and retail competition. Those changes are rattling Europe’s utilities so hard they must now undergo major transformations if they are to survive. Read the story to understand why.



via SmartGridNews.com http://www.smartgridnews.com/artman/publish/Business_Markets_Pricing/Are-Europe-s-utilities-dying-Or-can-they-reinvent-themselves-6007.html

Despite Chaos, Department of Energy Moves Forward with Energy Efficiency

Federal policymakers proposed rules to make furnace fans more energy efficient, despite the US government shutdown this week.The rules could save American consumers hundreds of millions of dollars in lower energy bills.



via Energy Efficiency Markets http://www.energyefficiencymarkets.com/2013/10/03/despite-chaos-department-energy-moves-forward-energy-efficiency/

What the U.S. Government Shutdown Means for the Energy Sector

http://lnkd.in/bRKTgut



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