Insulation monitoring and fault location of offshore platforms
The offshore oil extraction platform is a small working system located far from the mainland, with an independent working environment. The power grid system is complex, with not only a low-voltage to high-voltage frequency conversion system for providing 6kV motor operation, but also a medium voltage frequency conversion system for 3.3kV,
The offshore oil extraction platform is a small working system located far from the mainland, with an independent working environment. The power grid system is complex, with not only a low-voltage to high-voltage frequency conversion system for providing 6kV motor operation, but also a medium voltage frequency conversion system for 3.3kV, as well as an IT power grid system below 400V and lighting systems for personnel living and working. This solution is mainly aimed at insulation monitoring of low voltage systems below 400V and fault location functions of each branch.
The low-voltage system in offshore oil platforms is generally an IT power grid system below 400V (neutral point ungrounded power grid). The characteristic of the neutral point insulation system is that when the system is single-phase grounded, the voltage and phase between each phase remain unchanged, and the balance of the three-phase system is not disrupted, so it can continue to operate in a short period of time. This independent power grid system ensures the safe production of the platform, and the power grid will not shut down due to insulation failure of a certain load. However, if operated with faults for a long time, it can cause phase to phase short circuits, or when single-phase arc light is grounded, the system will resonate and cause overvoltage, which will put a lot of pressure on the platform production.
At present, the insulation monitoring of offshore oil production platform systems mostly only monitors the insulation level of the entire busbar, and cannot detect which branch load has insulation faults. This poses a challenge for timely troubleshooting of branch faults. Therefore, Xike Technology has launched the highly performance advantageous IFLS-600 insulation monitoring and fault location system, which not only monitors the insulation of the busbar in real time, but also locates the insulation faults of each branch. In addition, frequency converters for offshore oil platforms are widely used, and products from Xike Technology are more stable when used in power grids containing frequency converters.
The following is a schematic diagram of the application of IFLS-600 in offshore oil platforms:
