Power Substation
What is the digital substation and what makes it digital?
The Digital Substation is a term applied to electrical substations where operation is managed between distributed intelligent electronic devices (IEDs) interconnected by communications networks. It became possible by using computing technology in the substation environment. Microprocessors were introduced into substation… Read more
Jun 27, 2018 | By Edvard Csanyi
Power Substation
How Arc suppression reactors (Earth fault neutralisers or Petersen-coils) work?
Arc-suppression reactors are also named earth fault neutralisers or Petersen-coils after W. Petersen who launched the idea of this particular reactor application early in the previous century. In high voltage power systems single-phase earth faults may take place. These may… Read more
Jun 25, 2018 | By Edvard Csanyi
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Measurements of bad impulsive noise in HV substation caused by partial discharge (PD) sources
The phenomenon of impulsive noise is generated by partial discharge (PD) sources in high voltage substations. A PD generates a current impulse, acoustic noise, visible and ultraviolet (UV) light and electromagnetic radiation, and accordingly its presence can be detected via…...
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Jun 22, 2018 | By Edvard Csanyi
Medium Voltage
Current and voltage transformers (CTs and VTs) as protection’s eyes and ears
The CTs (current transformers) and VTs (voltage transformers) are provided in the plants to reduce the voltage and current values of the plant to values such as to be able to be detected by measurement and protection devices. They also… Read more
Jun 20, 2018 | By Edvard Csanyi
Energy Efficiency
16 power correction devices available to install and really improve the power quality
All modern electronic devices are vulnerable to the poor power quality. But why? What can you do about it? This technical article describes 12 types of power correction devices (16 in total) that accept electrical power in whatever form it… Read more
Jun 18, 2018 | By Edvard Csanyi
Power Substation
Four ways to bolster the short-circuit withstand capability of HV transformers
There are many methods applied to bolster the short circuit withstand capability of the transformers: improvement of the materials, reforming of the design and good maintenance in the operation process and so on. However, this article deals with methods for… Read more
Jun 13, 2018 | By Edvard Csanyi
Low Voltage
MV/LV Power Substations Design and Schematics Notes (Network Supply and Enclosure Types)
Early consultation with the local Electricity Distributor is essential for agreement on a mutually approved MV/LV substation to act as the intake point for a particular site. This consultation is usually before detailed knowledge of the plant or project is… Read more
Jun 11, 2018 | By Edvard Csanyi
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Critical role of time synchronisation in IEC 61850 based digital protection systems
The needs and exact precision of time synchronization in IEC 61850 based digital protection systems have evolved. With new technologies and better distribution methods, most modern intelligent electronic devices (IEDs) include at least one form of time synchronization. Many devices…...
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This content is not available in your premium membership plan. Please upgrade your plan in order to access this content. You can choose an annually based Basic, Pro, or Enterprise membership plan. Subscribe and enjoy studying specialized technical articles, online video courses, electrical engineering guides, and papers.With EEP's premium membership, you get additional essence that enhances your knowledge and experience in low- medium- and high-voltage engineering fields.
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Jun 08, 2018 | By Edvard Csanyi
Electric Motor
Why Raise the Power Factor? The Basics Every Electrical Engineer Should Understand.
A low power factor causes poor system efficiency. The total apparent power must be supplied by the electric utility. With a low power factor, or a high-kilovar component, additional generating losses occur throughout the system. Figures 1 and 2 below… Read more
Jun 06, 2018 | By Edvard Csanyi
Protection
Communications in power system protection (medias, protocols and network topologies)
A communication system consists of a transmitter, a receiver and communication channels. Type of medias and network topologies in communications provide different opportunities to advance the speed, security, dependability, and sensitivity of protection relays. There are a several types of… Read more
Jun 04, 2018 | By Edvard Csanyi
