Saleh Alhussain’s Post

𝐇𝐢𝐠𝐡 𝐕𝐨𝐥𝐭𝐚𝐠𝐞 𝐃𝐢𝐫𝐞𝐜𝐭 𝐂𝐮𝐫𝐫𝐞𝐧𝐭 (𝐇𝐕𝐃𝐂) 𝐋𝐚𝐭𝐞𝐬𝐭 𝐒𝐨𝐥𝐮𝐭𝐢𝐨𝐧𝐬 𝐏𝐃𝐅 A high-voltage direct current (HVDC) electric power transmission system uses direct current (DC) for electric power transmission, in contrast with the more common alternating current (AC) transmission systems. Most HVDC links use voltages between 100 kV and 800 kV. 𝐃𝐨𝐰𝐧𝐥𝐨𝐚𝐝 𝐏𝐃𝐅 𝐒𝐚𝐦𝐩𝐥𝐞: https://lnkd.in/dz_XTjEA HVDC lines are commonly used for long-distance power transmission, since they require fewer conductors and incur less power loss than equivalent AC lines. HVDC also allows power transmission between AC transmission systems that are not synchronized.  High voltage is used for electric power transmission to reduce the energy lost in the resistance of the wires. For a given quantity of power transmitted, doubling the voltage will deliver the same power at only half the current: Benefits Operational issues Controllability One of the key benefits of an HVDC system is the ability to precisely control power flows. In AC systems the power, like water, flows along the path of least resistance, which in some cases can result in unequal distribution of power across the transmission system. Lower currents incur less power loss, therefore high-voltage levels are utilised to reduce current to effective levels. HVDC is more efficient to transmit over long distances. HVDC is more environmentally friendly. HVDC can support the globalization of power grids. 𝐓𝐲𝐩𝐞𝐬 𝐌𝐨𝐧𝐨𝐩𝐨𝐥𝐞 configuration one of the terminals of the rectifier is connected to earth ground. The other terminal, at high voltage relative to ground, is connected to a transmission line. The earthed terminal may be connected to the corresponding connection at the inverting station by means of a second conductor. 𝐁𝐢𝐩𝐨𝐥𝐚𝐫 transmission a pair of conductors is used, each at a high potential with respect to ground, in opposite polarity. Since these conductors must be insulated for the full voltage, transmission line cost is higher than a monopole with a return conductor. Multi-terminal systems The most common configuration of an HVDC link consists of two converter stations connected by an overhead power line or undersea cable.

📣 Deliverable 2.2 now ready to read! The first version of the report “Grid-Forming Functional Requirements for HVDC Converter Stations and DC-Connected Power Park Modules in Multi-Terminal Multi-Vendor HVDC Systems” is out!   This report presents the project stakeholders’ view on these requirements. It will be used as a basis for the demonstration design as well as the selection of the test protocol and verification process. Among the main findings: • Four different use cases of how grid-forming control could be applied in an #HVDC system with and without support from the #windpower plants is proposed. • The importance of coordinating grid-forming control with DC voltage control is discussed and highlighted. The report work for this deliverable was spearheaded by Laurids M. B. Dall. Read the full report and additional details here! 👉 https://lnkd.in/dTXqc_pY #windenergy #windispower #offshorewind