Our focus today is on Why CCHT?, Why high voltage transport?, What is a CCHt?
Why CCHT?
High-voltage direct current (HVDC) technology is used for efficient transmission of electricity over long distances. Unlike alternating current (AC), HVDC systems have lower line losses and can transmit power over thousands of miles with minimal power loss. HVDC systems are particularly useful for submarine cables and for the interconnection of different power networks operating at different frequencies.
HVDC also allows better control of energy flows and can help stabilize networks by balancing supply and demand more effectively.
Alternating current (AC) is preferred over direct current (DC) for most power distributions because AC can be easily transformed into different voltage levels using transformers. This makes it more practical for long distance transmission, where high voltages are needed to reduce losses. Additionally, AC generators and motors are simpler and more cost-effective to build and maintain than DC ones.
The ability to efficiently step up and down voltages with AC infrastructure contributes to its widespread use in power systems.
Why high voltage transport?
High voltage lines are used to transport electricity over long distances, mainly to reduce energy losses. When electricity is transmitted at high voltage, the current required to deliver the same amount of power is lower, minimizing the loss of energy as heat due to the resistance of the transmission lines.
By increasing the voltage, the efficiency of the transmission system improves, allowing more efficient delivery of electricity from power plants to end users over large distances.
What is a CCHt?
In Poland, the high-voltage direct current (HVDC) line is part of the national grid infrastructure used to connect various regions of the country and improve the reliability of the electricity system.
One of the main HVDC connections in Poland is the PSE (Polskie Sieci Elektroenergetyczne) HVDC system, which connects different regions and allows efficient management of electricity flows across the country. This system supports the integration of renewable energy sources and improves grid stability.
High-voltage lines typically carry electricity at voltages ranging from 110 kV (kilovolts) to over 1,000 kV, depending on the distance and power transmitted. The current flowing through these lines varies depending on power requirements and voltage level.
For example, a typical high-voltage transmission line can carry currents ranging from a few hundred to several thousand amperes. The specific current depends on the transmitted power and the characteristics of the transmission system.
We believe in this article on Why CCHT? was easy to understand.