HVDC Transmission

 

HVDC Transmission

In addition, HVDC transmission systems additionally provide possible answers to the existing right-of-way demanding situations. One HVDC transmission system deployed above can prove to be greater reliable than a double circuit AC transmission line. An HVDC infrastructure can enhance the energy brief efficiency via using insulated HVDC cables in underground and subsea packages, that could accelerate the proper-of-manner permitting strategies techsupportreviews  . Moreover, HVDC transmission systems also can be mounted adjoining to or on the present AC strains, reducing the desires for proper-of-way land use.

Voltage Supply Converters (VSC) Knowledge in HVDC Transmission Systems

HVDC transmission structures rent current-supply, line-commuted converters (LCC), which require reactive strength from series capacitors, shunt banks, or filters to perform. However, a traditional HVDC transmission gadget fails to offer dynamic voltage guide to the AC community and control the machine voltage below a suitable variety, in the preferred tolerance. Consequently, voltage deliver converters are utilized in conventional HVDC transmission systems, no longer handiest to offer dynamic voltage law to the AC network but additionally to govern the strength waft within the machine.

HVDC transmission structures primarily based on VSC era can provide unbiased manage of both lively and reactive strength and not using a commutation screw ups. The switching of the IGBT regulators in VSC-based totally HVDC transmission follows a pulse width modulation (PWM), which lets in the system to adjust the section angle and amplitude of converter AC output voltage with regular DC voltage.

In addition, VSC-based totally HVDC transmission structures encompass two unbiased manipulate and protection systems, which incorporate of digital signal processors then microcontrollers, and offer redundancy to ensure excessive reliability. Such features are attributed to the stop-users’ inclination toward VSC technology over the LCC technology in HVDC transmission structures.

VSC-based totally HVDC systems are growing in recognition within the HVDC transmission system market, with over fifty five% of the revenue proportion of the marketplace. VSC-based transmission skill has come of age for conservative HVDC transmission systems, regardless of being a tremendously costlier option for better rated transmission packages.

Leading businesses in the HVDC transmission gadget marketplace are boosting the adoption of VSC generation to enhance the reliability of HVDC broadcast in renewable energy initiatives carried out worldwide. For instance, Toshiba Energy Systems & Solutions Corporation – a leading Japanese producer of energy generation systems – introduced the set up of a VSC-based totally HVDC transmission hyperlink connecting the Japanese continental (Honshu) to the northern islet of Hokkaido, in March 2019. The company proclaimed that this is Japan’s first VSC-based HVDC device that ensures six hundred MW of interconnection capability at all times.

In April 2019, the ABB Group – a Swiss-Swedish multinational business enterprise running in strength, heavy electrical gadget, and automation era segments – announced that it has hooked up a joint assignment with Hitachi, Ltd. – a Japanese international conglomerate business enterprise – to supply VSC-based totally HVSC transmission gadget for Higashi-Shimizu substation in Japan. The enterprise introduced that the VSC-based HVDC transmission structures will include  VSC converters (300,000 kW every), and Hitachi will assemble the device, so as to comprise of Hitachi converter transformers and an ABB HVDC convertor with a Control and Protection System.

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