Integration of energy storage systems
Energy storage is required because the demand side in a power utility is characterised by hourly, daily and seasonal variations, whereas the installed capacity of the supply side is fixed. To facilitate this varying demand at minimum cost and acceptable reliability, the utilities plan and operate their generation resources to match the load characteristics. During the decision-making process of planning, information regarding the effect of an energy storage unit on power system reliability and economics is required before it can be introduced as a decision variable in the power system model. The main objectives of introducing energy storage to a power utility are to improve the system load factor, achieve peak shaving, provide system reserve and effectively minimise the overall cost of energy production. Constraints of various systems must also be satisfied for both charge and discharge storage regimes. The impact of distributed energy storage integrated within the system has to be considered, including the effects of distributed units on system stability and spinning reserve requirements. The economics of storage devices have an influence on both the initial capital investment in the system and the operating and maintenance costs.
Integration of energy storage systems, Page 1 of 2
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