海上石油平台电力系统暂时过电压的研究-电力系统及其自动化专业论文.docxVIP

ABSTRACT According to China's oi1 development plans，during the days of the 11th fiveγe缸 plan，由egrow伽 of offshore oil in China wi11 usher in a period of rapid development ， 。他hore oil project scale have been expanding，security and stabi1ity of offshore oil platform wi1l show a great impact on 也e national economy and social construction. For all types of overvoltage occurred in onshore power systems，there has been S民 many researches about them，and has put forward varlous restrictive solutions，which obtained good results in practica1 application. Howev町，也e ov即voltage occurred in 他 offshore oi1 platform is not wel1 s阳died yet.The main reason may be 由at offshore oi1 pla旺。rmpow町 system is relatively specia1， generator capacity is small，and e盯ly sea oi1 platforms 町'e smallscale，on which used 也.e short length submarine cable， overvoltage shows no obvious impact on 由.e power sy tems. As the scale of offshore oil platform construction gradually expand时， submarine c?ble's len部h has been growing，阳也e new offshore oil platform in 阳South China Sea，也e len阱 ofthe submarine cable used has reached over 100 km，and impact of overvoltage caused by no load submarine cable on 伽。他hore oi1 platform will become more apparent. Therefore，由e s阳dy of the overvoltage ∞curred in 。他hore oi1 platform power system has gre创 sígnificance. After the load rl呼ection， there can be two types of ov时voltage caused by no load submarine cable occurred in offshore oil platform: parametric resonance overvoltage and power frequency ov即voltage. In也is pap自由.e reωons of occurrence the ，overvoltage，由e process of its development and 也e cbaracteristics of it are s阳di创 (执 and analyzed. The simulations are done by using so仕ware named EDSA. This pap町 propos创 using installation of arrest町 on submarine cable with generator insωled ， r AVR 阳 curb 由e par朋1伽ic resonance overvoltage. 白白 paper a1so verified the inhibition of shunt reactor on 由e power frequency overvoltage caused by no lo