A parallel arrangement and operation of synchronous generators, also called alternators, is preferred to a single unit generator. That parallel arrangement is achieved when several generators are connected in parallel to an infinite bus bar system with a constant terminal voltage, and bus bar frequency, as well as a small synchronous impedance. Synchronizing refers to Running Generators in Parallel alternators. Such an arrangement comes with several benefits.
One of the main benefits of such a connection is the continuity of supply and maintenance. You will find that when it comes to repairing and regular maintenance work, such an arrangement is most ideal. The fact that there are smaller generating units in the setup, you can have each unit assessed for maintenance without affecting the continuity of power generation. It, therefore, beats having one large unit, which once it is taken off-line for maintenance checks, there is no generation of power. You would be left with no power for a while, in an area that probably needs a constant supply.
It is also a more efficient arrangement. In most generators, you achieve maximum efficiency when you have them running at full power or maximum load. If you have one large generator, it makes no sense to have it running at full power all the time. You will have to reduce its load. That automatically leads to a loss in efficiency and an uneconomical situation. But if you have a parallel arrangement with smaller generator units in it, you can switch some of them off when you need less power. This leaves the others running at maximum load, thus assured efficiency, and fuel savings on those that are turned off. Find out more on load sharing generators now.
You will also have an easier time when you need to expand a power plant’s output. There are always changes in the demand for power from such plants. The population increases increased manufacturing activities, and other demands for more power will motivate such an expansion. If you relied on one large generator unit, it would be an expensive feat to replace it with a more powerful one. But if you had a parallel arrangement, it becomes cheaper to add more units to the setup.
You will also find that managing smaller generator units is much easier than managing one large unit. The energy output and other demands of such a large generator make repairs, maintenance, diagnostics, security, and the potential for dangerous incidents much harder to predict and control. Find out more here: https://www.britannica.com/technology/diesel-engine/Major-types-of-diesel-engines.
