Few things that capacitors do perfectly

Capacitors provide tremendous benefits to distribution system performance. Most noticeably, capacitors reduce losses, free up capacity, and reduce voltage drop. Let’s go a little bit into details. By canceling the… Read more

Oct 05, 2015 | Energy and Power

Applying Variable Speed Drives To Control Pressure

Using variable speed drives (VSDs) to control pressure reduces the electrical energy requirements by reducing the amount of hydraulic energy actually produced. A basic pressure control pump station is equipped… Read more

Oct 03, 2015 | Industrial Automation

Synchronizing Generator To The Grid

Having discussed the principles of synchronizing generator to the grid, we will look briefly on the physical method of accomplishing it. In theory, there are at least two simple measurements… Read more

Oct 02, 2015 | Energy and Power

Substation AC Auxiliary Supply For Inessential Loads

The purpose of auxiliary power supply systems is to cater for the necessary energy for the operation of primary and secondary devices at the substation. The auxiliary power systems are… Read more

Sep 30, 2015 | Energy and Power

FACTS Devices To Enhance Power System Performance

Flexible Alternating Current Transmission System (FACTS) simply refers to a combination of power electronics components with traditional power system components. They are intended to improve our power system reliability, power… Read more

Sep 28, 2015 | High Voltage

Acceptable levels of distortion in the mains supply system

In the mains supply system, harmonic voltage distortion is the consequence of the flow of harmonic currents through the impedances in the power supply circuit connected to the converter. A… Read more

Sep 26, 2015 | Energy and Power

Surge Protective Devices In TN Systems (Guide For Low Voltage Electricians)

For “protection against electric shock under fault conditions“ in TN systems, overcurrent and residual current devices have been approved. For the use of surge protective devices (SPDs) this means that… Read more

Sep 25, 2015 | Energy and Power

Analysis of pole-mounted MV/LV transformer grounding

Let’s discuss in some detail the reasons for the grounding philosophy adopted for pole-mounted MV/LV transformer substations illustrated in Figure 0. Contents: LV grounding MV grounding Combined MV/LV grounding Separate… Read more

Sep 23, 2015 | Energy and Power

Substation DC Auxiliary Supply – Battery And Charger Applications

Power substation can have one or several DC systems. Factors affecting the number of systems are the need of more than one voltage level and the need of duplicating systems…. Read more

Sep 21, 2015 | Energy and Power

Voltage Drop Calculations For Engineers – Beginners

Voltage drop calculations using the DC-resistance formula are not always accurate for AC circuits, especially for those with a less-than-unity power factor or for those that use conductors larger than 2… Read more

Sep 19, 2015 | Electrical Lectures