Diesel hybrid systems in Mauritius and Pakistan

14.04.2015
Aerial view of the finished DHybrid Fuel Reduction System at the Super-U shopping centre in Mauritius (Photo: DHYBRID Power Systems GmbH)
Aerial view of the finished DHybrid Fuel Reduction System at the Super-U shopping centre in Mauritius (Photo: DHYBRID Power Systems GmbH)

The German expert company for PV / diesel hybrid systems DHybrid Power Systems put the world's largest hybrid system into operation on the island of Mauritius in March 2015. A similar hybrid system is also supplying the oil loading port as well as a refinery in Pakistan with energy.

A Fuel Reduction System (FRS) is a hybrid system for own-consumption that consists of a photovoltaic system in combination with diesel generators. The DHybrid system that was installed in Mauritius within a period of eight weeks has a total capacity of 1.2 MW and will supply 1,800 MWh of electricity annually. This means that a total of 500,000 litres of diesel fuel can be saved.

100% own-consumption

The FRS system in Mauritius consists of just over 4,700 PV modules, 70 inverters, an energy storage system, and the main controller with seven FRS interfaces from DHybrid. The shopping centre that the system is installed on uses 100% of the self-generated electricity and does not feed any into the grid. Excess solar power is stored using special cooling tanks. At night, the energy stored as ice is used for air condition in the mall and to cool foods.

The building's uninterruptible power supply and the power storage system ensure the autonomy of the shopping centre even at full load. The IT systems, POS systems and emergency lighting were given special priority when the system was designed.

The first FRS system in Pakistan

An oil refinery with a loading terminal in Karachi, Pakistan, is now also using hybrid technology. DHybrid has installed a Fuel Reduction System including an open-area PV system consisting of 342 PV modules. This will allow annual savings of 182 MWh of energy and 53,000 litres of diesel fuel.

One main focus of the project was to secure the terminal against the frequent power outages in Pakistan and also to fulfil the high safety criteria for working at an oil terminal. In order to comply with the explosion protection regulations, glass fibre connections were used for communications between the PV system, main controller and the diesel generators. This allows the operator to monitor the DHybrid system via remote access around the clock.

Much of the energy generated by the new FRS system is used for pumping station systems that fill oil tank trucks for further transport. DHybrid managed the entire material procurement process as well as transportation, and the company was also responsible for all engineering tasks as well as the integration of the FRS with the existing diesel generator power system.

Tanja Peschel / Dihybrid