Generation Scheduling and Reserve

Demand forecasting provides a fairly accurate picture of the expected load over the following 24 hours so that enough generators are scheduled to provide the expected demand plus a reserve, a concept to be discussed in the following section. The process is complicated by the disparate characteristics of plant on the system.

In Chapter 7, it will be shown how generators are loaded on economic grounds subject to various constraints. In anticipation of an increase in demand a choice has to be made by a utility on which uncommitted generating sets from a number of available generating units (some sets may not be available as they are undergoing repairs or maintenance) have to be prepared (heated, synchronized and loaded) and eventually shut down when the demand declines. This is a complicated economic and technical choice. In a privatized energy market one company, usually the one in charge of the transmission system, has the role of plant selection, but here decisions are taken in the context of the contractual relations between the different participants in the electricity market. Chapter 7 describes how regulatory tools, tariffs and bidding systems are used in these circumstances to ensure that supply tracks demand.

Renewable Energy 101

Renewable Energy 101

Renewable energy is energy that is generated from sunlight, rain, tides, geothermal heat and wind. These sources are naturally and constantly replenished, which is why they are deemed as renewable. The usage of renewable energy sources is very important when considering the sustainability of the existing energy usage of the world. While there is currently an abundance of non-renewable energy sources, such as nuclear fuels, these energy sources are depleting. In addition to being a non-renewable supply, the non-renewable energy sources release emissions into the air, which has an adverse effect on the environment.

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