High Voltage
Analysing the costs of High Voltage Direct Current (HVDC) transmission
Introduction to HVDC Cost structure of HVDC Assumptions made in the price calculations Thyristor based HVDC system versus high voltage AC system VSC based HVDC system versus an AC system… Read more
Aug 06, 2014 | By Edvard Csanyi
Energy and Power
7 most known high voltage insulation methods you should know
Before getting to the specifics of each material, there are a couple of issues that apply to all materials. First, it is important that the insulating material is homogeneous. This… Read more
Aug 04, 2014 | By Edvard Csanyi
High Voltage
An Example of Choosing 138 kV Line Circuit Breaker
To better understand a process of high voltage equipment selection, let’s discuss an example of choosing 138 kV Line #3 Circuit Breaker, shown in Figure 1, assuming that the following… Read more
Jul 23, 2014 | By Edvard Csanyi
High Voltage
How to mitigate effects of very fast transients (VFT) on HV equipment
The level reached by very fast transients (VFT) overvoltages originated by disconnector switching or line-to-ground faults inside a gas insulated switchgear (GIS) are below the basic insulation level (BIL) of… Read more
Jun 11, 2014 | By Edvard Csanyi
High Voltage
An example of calculating the technical losses of T&D lines
There are two types of losses in transmission and distribution line. Technical Losses and Commercial Losses. It’s necessary to calculate technical and commercial losses. Normally technical losses and commercial losses… Read more
Apr 25, 2014 | By jiguparmar
High Voltage
Hey Mom, look at that big HVDC Transformer!
HVDC transformers are key components of HVDC stations. HVDC converter and inverter stations terminate long-distance DC transmission lines or DC sea cables. This type of transformer provides the interface between… Read more
Mar 19, 2014 | By Edvard Csanyi
High Voltage
8 main disadvantages of HVDC transmission
Few weeks back I posted an article about advantages of HVDC over HVAC transmission systems. Advantages of HVDC are numerous and very well recognized, but like everything on this earth… Read more
Jan 10, 2014 | By Edvard Csanyi
Energy and Power
Electrical Thumb Rules You MUST Follow (7)
Continued from: Electrical Thumb Rules You MUST Follow (Part 6) Overhead conductor / cable size Transmission / distribution line (span, height of tower) Types of towers Tower swing angle clearance (metal… Read more
Dec 23, 2013 | By jiguparmar
High Voltage
What are the main advantages of HVDC over HVAC transmission
Despite alternating current being the dominant mode for electric power transmission, in a number of applications, the advantages of HVDC makes it the preferred option over AC transmission. Examples include:… Read more
Dec 18, 2013 | By Edvard Csanyi
High Voltage
15 hypothesis responsible for the aging of composite insulators
Most technical work concentrates on the aging of nonceramic insulators and the development of test methods that simulate the aging process. Transmission lines operate in a polluted atmosphere. Inevitably, insulators… Read more
Dec 04, 2013 | By Edvard Csanyi
High Voltage
General principles of electricity supply systems
The generation of electricity in most modern power stations is at 25 kV, and this voltage is then transformed to 400 kV for transmission. Virtually all the generators of electricity… Read more
Nov 25, 2013 | By Edvard Csanyi
High Voltage
Five special transformers for industrial applications you should know about
A number of industry applications require specific industrial transformers due to the usage of power (current) as a major resource for production. Electric arc furnaces (EAF), ladle furnaces (LF) and… Read more
Sep 23, 2013 | By Edvard Csanyi
High Voltage
Talking about HV shunt reactor switching (part 2)
Continued from first part: Talking About HV Shunt Reactor Switching (part 1) Scope (explained in previous part) Shunt reactors application (explained in previous part) Closing operation (explained in previous part)… Read more
Jul 31, 2013 | By Nicola
High Voltage
Talking about HV shunt reactor switching (1)
These notes aim to give basic idea of the main criticalities related to HV shunt reactor switching, particularly in terms of voltage, and how such problems are faced and solved… Read more
Jul 29, 2013 | By Nicola
High Voltage
Commissioning of HV Panel – Operational and Functional Checkup
The main objective of the test is to check the proper operation function of the circuit breaker; in this test we do the following: This test is conducted by manual,… Read more
Jul 17, 2013 | By Edvard Csanyi
