Generator Load Sharing / Synchronised Generators
Parallel Generators 660-1100KVA
The Paralleling Advantages
Increased reliability and redundancy: Improving reliability and redundancy for both critical and non-critical loads. Parallel generators ensure that there is always constant power to critical loads, and if one of the generators fails, the load is supplied by the other one or more parallel unit.
Low cost of power generation:
Cost of generation increases with generator size and is more for ratings above 600KW. This is due to the fact that the market for smaller engines is higher, hence more are manufactured, resulting in lower cost. Using several smaller generators becomes more economical than a single large generator.
Decreased light loading of the generator prime mover:
In most installations, the load varies from time to time and it is common to have a generator running at 30% of its capacity when the load is low. This may cause wet stacking. The efficiency of the prime mover is normally higher when the load is between 75% and 100%, and a light load means that the generator operation is inefficient. Using a smaller generator increases efficiency, hence a cost reduction.
Control and savings on generating costs:
The total amount of power supplied from several small generators is equal to the power supplied by one large unit. However, there is more control and balance in the smaller generators. One can balance the load over the different circuits, and decide on the power to generate at any particular time based on the load.
The parallel system can achieve huge savings when all generators are operated above 75% of their rated load. This is the point at which generators use the minimum fuel.
The use of several generators makes it possible to supply a varying load without piling up costly units or spending too much on a big generator whose full capacity is rarely used. Generators can be added gradually as demand increases.
Also known as paralleling generators load sharing, load sharing of generators and generator paralleling, generator synchronization and load sharing