The connection of wind farms into distribution and transmission systems will have a local effect on voltage levels and reactive power flows, as discussed in the preceding chapters. The primary objective, however, of this network infrastructure is to deliver active power economically and reliably from generation sources to individual loads scattered across a national area. One of the underlying characteristics of electricity supply, which profoundly affects the manner in which it is engineered, is that electri cal energy cannot be stored conveniently or economically. The consequence of this statement is that, ignoring any losses incurred in the electricity transmission network, there must be an instantaneous balance between the electrical power generated and the system demand.

Chapter Contents:

• 5.1 Introduction
• 5.2 Load-frequencycontrol
• 5.2.1 Unit load-frequency control
• 5.2.2 Emergency frequencycontrol
• 5.3 System operation with wind power
• 5.3.1 Overview of system operational challenges of wind power
• 5.3.2 Wind power in Ireland
• 5.3.3 System operation and wind variability
• 5.3.4 System operationalmodes
• 5.3.5 Capacity credit
• 5.3.6 Ancillary service provision
• 5.3.7 Wind turbine generator inertialresponse
• 5.3.8 Distributed generation protection
• 5.4 Energy storage/flexible load management
• 5.4.1 Conventionalener gy storage
• 5.4.2 Demand-side management
• 5.4.3 Hydrogen energy storage

Inspec keywords: power distribution; wind power plants; reactive power; power generation reliability; power transmission; load flow; power generation economics

Other keywords: active power; reactive power flow; electricity transmission network; electricity supply; power system operation; wind farm; electrical power generation; distribution system

Subjects: Wind power plants