HVDC can be used in long-distance large-capacity electric energy transmission, power system asynchronous networking, long-distance submarine cable transmission, large-capacity grid connection of new energy, power supply to weak AC system or passive system, construction of urban DC distribution network and other occasions.
China XD Group is capable of researching and designing HVDC systems (including conventional DC and flexible DC).Have the ability to manufacture and test all primary equipment and control protection devices of HVDC power transmission engineering, including converter valves, converter transformers, flat wave reactors, AC-DC filters, switches, arresters, measuring devices and control protection devices;Have the ability to guide project construction and commissioning.It can provide solutions covering HVDC and UHVDC transmission engineering system according to users' needs, including independently undertaking HVDC transmission engineering system research and complete design, equipment sets or EPC turnkey projects.Conventional DC transmission system voltage and transmission capacity can be up to ±1100kV/12000MW.Flexible HVDC system voltage and transmission capacity up to ±800kV/5000MW.
Overall technical solution of HVDC power transmission project
① Zhoushan -100kV/50MW DC transmission project
This project is the first DC transmission project in our country.Complete the system research and complete design, complete the supply of converter valves, converter transformers, flat-wave reactors, control and protection systems, AC filters, DC field equipment and other complete sets of DC system equipment, completed the project debugging.
② Shengsi ±50kV/60MW bipolar submarine cable DC power transmission project
Complete the system research and complete design, complete the supply of converter valves, converter transformers, flat-wave reactors, control and protection systems, AC filters, DC field equipment and other complete sets of DC system equipment, completed the project debugging.
(3) South Korea's Jeju Island ±80kV/60MW DC demonstration project
Complete the system research and complete design, complete the supply of commutator valves, flat-wave reactors, control and protection systems, AC filters, DC field equipment and other complete sets of DC system equipment, completed the project debugging.
④±10.5kV/66MW three-terminal hybrid DC test system
Completed the general contract project of ±10.5kV/66MW LCC-VSC-VSC three-terminal hybrid DC test system, responsible for system research and complete design, converter valve design and production, complete supply of AC and DC equipment, equipment installation and system debugging.
