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Integration of energy storage systems

Integration of energy storage systems

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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.

Chapter Contents:

  • 14.1 Problem formulation
  • 14.2 Power system cost function
  • 14.3 System constraints
  • 14.4 Design criteria for the introduction of a storage unit

Inspec keywords: power generation economics; power generation reliability; power distribution economics; power generation planning; power distribution reliability; power system stability; energy storage; investment; cost reduction; power distribution planning; demand side management; decision making

Other keywords: energy storage systems; power system reliability; demand side management; system stability; power system economics; power utility; system load factor; energy production; generation resources; maintenance costs; planning process; distributed energy storage; spinning reserve requirements; power system model; cost reduction; initial capital investment; load characteristics; charge-discharge storage regimes

Subjects: Power system planning and layout; Reliability; Power system management, operation and economics; Distribution networks; Power system control; Other energy storage

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