In flow pneumatic valve is the core equipment of dc power transmission project

in flow pneumatic valve by thyristor, damping capacity, equalizing capacitor, damping resistance, pressure resistance, saturated reactor, thyristor control unit and other components. Among them, the thyristor converter is the core of the pneumatic valve parts, it determines the flow ability of converter pneumatic valve ( At present, the domestic has developed the inches thyristor, rated flow ability amp) By multiple thyristor components series hope the system voltage can be obtained. Trigger thyristor trigger mode is divided into electricity and light trigger, ABB and Siemens are respectively the representatives. In flow pneumatic valve is the core equipment of dc power transmission project, through, in turn, connect the three-phase ac voltage to dc side achieve the desired dc voltage and realize the control of the power, the value of converter station complete sets of equipment price ~ %. In flow pneumatic valve design and application of the power electronic technology, electric conversion technology, high technology, control technology and equalizing technology, cooling technology, high voltage insulation material of the latest technology and research results, the main technical difficulties lies in: in the establishment of the pneumatic valve transient simulation model; In high potential integral shielding and shielding performance of the pneumatic valve research; In flow pneumatic valve insulation coordination, partial discharge level of control and suppression technology; In flow pneumatic valve key device is developed; Converter cooling, photoelectric conversion technology, pneumatic valve pneumatic valve control and equalizing technology integration; Research of converter pneumatic valve type testing method. Foreign exchange flow pneumatic valve manufacturer mainly ABB and Siemens. Xi 'an xd power rectifier co. , LTD as the primary production enterprises, domestic converter pneumatic valve from century in the eighty s, involved in China has been built and is building all 13 of the HVDC projects of technology introduction and equipment manufacturing work, change the flow pneumatic valve from plus or minus kv ~ + kv voltage level, including electric contact hair crystal thyratron converter pneumatic valve and light touch hair crystal thyratron converter pneumatic valve, product performance reached the international advanced level. Xu Ji group through the introduction of Siemens technology, become the second can produce domestic converter pneumatic valve enterprise.