In this post you will find detailed information about What do we mean by HVDC transmission system?, What is the HVDC project?, What is the system that allows direct direct electricity to be obtained?
What do we mean by HVDC transmission system?
An HVDC (high voltage direct current) transmission system is a method of transmitting electricity over long distances using high voltage direct current (DC). HVDC systems are very efficient at transferring large amounts of energy over large distances, especially when connecting the power grids of different regions or countries.
The use of high voltage in DC transmission reduces energy losses due to resistance in transmission lines. HVDC is also advantageous in submarine cables, where AC transmission would result in higher losses.
The system typically involves converting alternating current to direct current for transmission and then converting it back to alternating current at the receiving end for distribution.
What is the HVDC project?
Electric power transmission refers to the process of transporting electricity from power plants to substations near populated areas or industrial areas.
The electricity is then distributed to homes, businesses and other consumers. Transmission is generally carried out at high voltage to minimize energy losses over long distances. High voltage electricity is reduced to lower voltages at substations before being distributed to end users. This process is essential to ensure a reliable supply of electrical energy over large geographic areas, thus enabling the functioning of modern society.
Direct current (DC) is transported by converting alternating current (AC) generated in power plants into direct current using rectifiers.
Direct current is then transmitted via power lines, often at high voltage, to reduce energy loss over long distances. On receipt, direct current is converted back to alternating current using inverters, making it suitable for distribution and use by consumers.
In HVDC systems, this conversion and transmission process is crucial for efficiently transporting large amounts of electricity, especially over long distances, via submarine cables or between different grid systems.
What is the system that allows direct direct electricity to be obtained?
Electricity transmission works by transporting electrical energy from power plants to substations via high-voltage transmission lines.
The process begins with the production of electricity, usually in the form of alternating current (AC), in power plants. Transformers increase the voltage to a high level to reduce losses during transportation. High-voltage electricity travels over long distances over transmission lines supported by pylons. By reaching substations near demand centers, transformers lower voltage to ensure safe distribution to homes and businesses.
The entire system is designed to minimize energy losses and ensure efficient electricity delivery.
Direct current (DC) cannot be transmitted over long distances as efficiently as alternating current (AC) due to several factors. In DC transmission, maintaining high voltage over long distances requires very large conductors and is more subject to losses in the form of heat due to conductor resistance. Additionally, DC systems do not benefit from the ease of voltage transformation that AC systems offer using transformers.
In AC systems, transformers can easily step up and down voltages, thereby reducing losses during transmission.
These characteristics have historically made AC more favorable for long-distance transmission, although modern HVDC technology has alleviated some of these problems, making DC transmission more viable in specific applications.
We hope this explanation helps you to understand on What do we mean by HVDC transmission system? and answered your questions.