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In future power systems, widespread small-scale energy storage systems (ESSs) can be aggregated to provide ancillary services. In this context, this paper aims to integrate energy storage aggregators (ESAs) into the load frequency control (LFC) framework for power system frequency control. Firstly, a system disturbance observer is designed to supplement the secondary frequency control, where the ESA can respond to the estimated disturbance and accelerate the system frequency recovery. Then, within the ESA, a finite-time leader-follower consensus algorithm is proposed to control the small-scale ESSs via sparse communication network. This algorithm ensures that the ESAs can track the frequency control signals and the state-of-charge balancing among each ESS in finite-time. The external characteristics of the ESA will resemble to that of one large-scale ESS. Numerical examples demonstrate the convergence of the ESA under different communication graphs. The effectiveness of the entire framework for power system frequency control is validated under a variety of scenarios.
|Number of pages||12|
|Journal||IEEE Transactions on Smart Grid|
|Early online date||8 May 2018|
|Publication status||E-pub ahead of print - 8 May 2018|
- frequency control
- consensus algorithm
- energy storage systems
- demand response
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- 1 Finished
Burt, G., Bell, K., Catterson, V., McArthur, S., Roscoe, A. & Hawker, G.
European Commission - FP7 - Cooperation only
1/12/13 → 30/11/17
Dynamic Power Systems Laboratory
Graeme Burt (Manager)Electronic And Electrical Engineering