This part of GB/T 22390 specifies technical requirements,test methods,test rules, packaging, transport, storage, markings, labels, user’s manual, completeness of supply, as well as quality assurance of the ±500 kV HVDC operator control system. This part of GB/T 22390 is applicable to the operator control system (hereafter referred to as “system”) of ±500 kV HVDC transmission system.