Student project: Hainan Pump station

Background

This diploma project is performed in cooperation with Aventi Technology the spring 2009, as a part of our bachelor degree in Electrical and Electronic Engineering at Oslo University College. The projects group members are Anders Dahlgren, Admir Bitanga and Geir Anders Haga.

During this diploma project the objective was to develop a standard solution for a control system for pump stations. The pump stations controls the pressure and flow in subsea high-voltage cables. The control system is an Allen Bradley PLC based system. The standard solution also involves a HMI (Human Machine Interface) which enables interaction with the process. A simulator was created to test and market the control system.

Objective

The objective was to develop a standard solution for a pump station control system with HMI and a simulator. The control system can easily be modified to fit any pump station of the same type. In addition the objective was to use the standard solution on two specific pump stations on the west coast of Norway.

During the project the object was slightly changed. The pump station project on the west coast got delayed and another ongoing pump station project was taken into consideration. This project was located in Hainan (China), and was very similar to the project in Norway. The standard solution could be used with a few modifications.

Hainan Pump station

Hainan is the second biggest island in China. The government is building a subsea power line from the mainland to Hainan. These power cables provide the island with power. In the future a nuclear power plant will be built to provide the main land with power through the same cables. The power cables transports up to 525.000 VAC and have a maximum range of 50 km.

The oil filled cable is the only subsea cable that can handle voltage that exceeds 420.000 VAC. An oil filled cable uses oil pressure to keep the sea water out of the cable and for isolation. The isolation is created by a paper layer and the oil. These cables need a pump station on both sides of the cable to maintain pressure.