# Archive: Category «Transmission and Distribution»

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# How to locate harmonic currents and where to control them?

On radial utility distribution feeders and industrial plant power systems, the main tendency is for the harmonic currents to flow from the harmonic-producing load to the power system source. This… Read more

Sep 16, 2016 | Edvard

# Power flow in MV radial network and calculation of voltage drop and loss

In three phase system the load for each phase should be the same. We call symmetrical load when the load of each phase is equal. In symmetrical circuit each phase… Read more

Sep 12, 2016 | Edvard

# 4 essential implementations of protective relays in power systems

In this technical article, protective relays are categorized depending on the component which are protect: Generators Transmission lines Transformers, and Loads There are different protection schemes used for protecting generators… Read more

Sep 05, 2016 | Edvard

# Why busbar trunking system is a space saving solution worth every penny

As line distribution boards, busbar trunking system (BTS) also belongs to the group of switchgear assemblies documented in IEC 61439 (VDE 0660-600). Apart from the general requirements of IEC 61439-1… Read more

Aug 17, 2016 | Edvard

# What is distribution substation and its main components?

Distribution substation typically operates at 2.4 – 34.5 kV voltage levels, and deliver electric energy directly to industrial and residential consumers. Distribution feeders transport power from the distribution substations to the end… Read more

Jul 22, 2016 | Edvard

# The basics of power in alternating current circuits (you MUST NEVER forget)

In a DC circuit, the power is equal to the voltage times the current, or P=V×I. This is also true in an AC circuit when the alternating current and voltage… Read more

Jul 08, 2016 | Edvard

# Power Distribution Network Explained To Electrical Engineers (Beginners)

In the UK, voltages of 132 kV, 110 kV, 66 kV, 33 kV and 11 kV are typically used to provide primary distribution, with a 380–415 V three-phase and neutral… Read more

Jun 28, 2016 | Edvard

# 4 Main Types Of Distribution Feeder Systems To Recognize

Let’s take a look at the four most common distribution feeder systems applied nowdays. There are few other variations, but we will stick to the basic ones. It’s very important to… Read more

Jun 23, 2016 | Edvard

# 5 Serious Environmental Impacts Of HVAC Over HVDC Overhead Transmission Lines

The following discussion largely summarizes a paper by L. A. Koshcheev (2003) on the potential environmental impacts of HVDC overhead transmission lines in comparison to HVAC lines. In the paper,… Read more

Jun 20, 2016 | Edvard

# Influence Of Electric Field and Clearances In EHV AIS Substation

Bus height is also governed and calculated by the fact that allowable electric field due to live conductor at man height should be less than permissible value as per guidelines… Read more

May 27, 2016 | Asif Eqbal

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