Coordinating independent non-dispatchable generation and energy storage systems

• Firm access limits the generation that can be connected to distribution networks.
• Energy storage systems can facilitate the integration of non-dispatchable generation.
• Coordination aims to maximise the income of the non-dispatchable generators.
• Comparison with “last-in, first-off” access to the networks is presented.
• Additional income obtained is allocated so as to incentivise coordinated operation.

Permission to connect a generator to the distribution system is generally obtained on the basis that the generator’s effect is limited and that the network voltages and currents remain acceptable at all times. The capacity of generation that can be connected is limited by this firm access connection policy. Energy storage systems can facilitate the integration of additional generation that cannot be dispatched. The coordination of independent non-dispatchable generators and energy storage systems connected to the same circuit is presented. The coordination aims to maximise the production of the generators without exceeding the power limit of the circuit, so as to maximise their income. Energy storage systems are asked to change their schedule to allow generators to maximise their production. Additional income is obtained from additional energy production. The additional income obtained is allocated so that both generators and energy storage systems have an economic incentive to be operated in a coordinated manner.

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