Aleen Mohammed

Aleen brings a unique skillset in that he has six years of experience as a utility consultant and five years of experience as an engineer at a public utility. In these roles, he created physical design drawings, protection & control drawings, and SCADA drawings for numerous substations and successfully managed projects as a lead engineer to meet scope, schedule, and budget requirements. Aleen also has experience in conducting system studies for industrial facilities to determine available short-circuit current to specify equipment, arc-flash hazard study using IEEE 1584 to specify PPE, and load flow studies to specify capacitors. Besides work, he has contributed to the IEEE 1584 standard and PJM’s (Designated Entity) substation standards.

Per Unit System – An Introduction

Fundamental to any power system analysis is the know-how of per unit systems. This article, part of a series of articles, will explain step by step how to calculate these parameters for any component anywhere in the power system. Let’s begin with the purpose.

Per unit system

The Power Flow Crux

The electrical power grid operates in equilibrium. The power supply from the generator matches the demand levied by the end-users. The flow of power to enable this demand-supply equilibrium over the transmission lines (T-lines) is governed by the following conditions.

Transmission Lattice Tower

Power Transformers – Design and Application

Power transformers are widely used in a power system to transform voltage. The most common type, a two winding transformer, has one winding connected to a high voltage – low current circuit while the other winding is connected to a low voltage – high current circuit.

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