Security of electricity supply is important and for this reason a back-up fuel to LPG is often a requirement. This is especially critical in smaller isolated power systems with a limited number of plants and units in the system.
Wärtsilä offers two different multi-fuel solutions that use LPG as fuel. One solution can, during operation, be switched to run on diesel as a back-up fuel. This is valuable not only in the case of a disruption in the LPG supply for any reason, but also in case of e.g. a seasonal LPG price hike. The other solution burns either LPG or natural gas, and is ideal for plants where natural gas is expected to be available in the future. Also, in small and medium-sized power systems with varying system demand, large single-unit power plants can be problematic. Here flexible baseload, multi-unit power plant solutions as provided by Wärtsilä are ideal. The plants give both the highest possible availability at system and plant level, as well as the highest possible overall efficiency for the power system.
Finally, flexibility of operation and multi-unit plant configurations are essential for the future integration of renewables in any power system. Thermal power plants will in the future have to cope with multiple starts and fast ramping on a daily basis in order to be able to back-up and maximize renewable generation. When choosing the technology for the next generation of thermal power plants, it is important that the chosen technology optimizes the power system as a whole and facilitates the future larger scale integration of renewables.