Posts Tagged ‘reactive power’

Compensation of Reactive power in 6 kV network

September 14th, 2018 | Make a comment | Posted in Power quality
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My name is Mile and here’s my article about my work on the following huge electrical engineering project. Enjoy :)

The production capacity of REK Bitola, the biggest power plant in Republic of Macedonia, is around 80% of all the consumed electric power in Macedonia. Regarding that fact, the Suvodol and Brod Gneotino mines, are the vital points from where the plant receives coal, in table 1 I have presented the measured installed power of the both mines and their power blocks.

reactive power Installed powe

Table 1. Installed power

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Reactive power compensation in long middle voltage power lines

July 22nd, 2016 | 2 Comments | Posted in Power quality
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megaphone-darkblueMile is a young member of the community and he often sends articles about several topics. But his particularity is that he shares the experiment he had in school as a young electrical engineer student in Romania.

You too can share your experiment and be published in the blog, just send a mail to the team!

Introduction

The general purpose of this article is to compare several ways of compensation of reactive power in middle voltage power lines in order to determine the optimal technical and economical solution. In this article I am going to examine middle voltage power line which is fed from 110/20 kV/kV transformer station. Load flow analyses will be made for different cases and loads for the transformer station. According the results from the analyses the optimal technical solution will be determined.
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Power factor correction of networks (work experience)

July 4th, 2016 | Make a comment | Posted in Power quality
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electrical-engineer-testimonyIn last month newsletter (newsletter#79), we introduced you to Mile, one of the members of the community.

From then on, he kindly decided to help providing the blog with material, and his 1st attempt is about power factor correction of networks.

Tell this young man from Macedonia what you think about it below!
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Synchronous motor: field regulation techniques

April 26th, 2016 | Make a comment | Posted in Energy Efficiency - motors
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Last time, D. Ros published a very interesting article about motors and drives. Today he’s at it again with synchronous motors and guess what? He proposed to publish a series of articles about motors! We thank him dearly.

If you want to contribute to the blog too, simply send us a mail

Synchronous machines are highly regarded in the industry for their unique applications of high mechanical power demand, power system control, and plant power factor correction.

However, the uniqueness of these applications has lead into different regulation techniques oriented to meet their specific requirements.

Ball Mill driven by Synchronous Motor

Figure 1: Ball Mill driven by Synchronous Motor

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Tariff and metering for low voltage systems

December 29th, 2014 | Make a comment | Posted in Electrical distribution
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Let Marvin tell you about reducing power losses and remember that you too can send us your articles by mail.

Different countries, regions, and power utility companies use different variables for billing and tariff structures. The primary objective of this article, thus, is not to focus on particular tariffs, rather, the basic elements that permeate across all the regions.

In short, I seek to highlight the two fundamental ways to reduce peak power demand and power losses in the generation and transmission.

Power Peak Demand Reduction

To get the most out of the generation and transmission company, the primary objective is to reduce power peak demand while seeking higher demand during the low load periods. Most power utility companies offer reduced tariffs at specified times of the day and year. Do note that the higher the peak demand, the higher the bill amount.

For large industries operating on LV and MV, there may be as many as four different rates used for calculation in the course of the day. The primary objective of the attending engineer is to get the maximum load, or shift the loads to maximize on the lowest rates.

Tariff and metering for low voltage systems
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