Online optimization in power systems with high penetration of renewable generation: Advances and prospects

Z Wang, W Wei, JZF Pang, F Liu, B Yang… - IEEE/CAA Journal of …, 2023‏ - ieeexplore.ieee.org
Traditionally, offline optimization of power systems is acceptable due to the largely
predictable loads and reliable generation. The increasing penetration of fluctuating …

Stability and optimality of distributed secondary frequency control schemes in power networks

A Kasis, N Monshizadeh, E Devane… - IEEE Transactions on …, 2017‏ - ieeexplore.ieee.org
We present a systematic method for designing distributed generation and demand control
schemes for secondary frequency regulation in power networks such that stability and an …

Primary frequency regulation in power grids with on–off loads: Chattering, limit cycles and convergence to optimality

A Kasis, N Monshizadeh, I Lestas - Automatica, 2021‏ - Elsevier
Load side participation can provide valuable support to the power network in case of
urgencies. On many occasions, loads are naturally represented by on and off states …

A distributed scheme for secondary frequency control with stability guarantees and optimal power allocation

A Kasis, N Monshizadeh, I Lestas - Systems & Control Letters, 2020‏ - Elsevier
We consider the problem of distributed secondary frequency regulation in power networks
such that stability and an optimal power allocation are guaranteed. This is a problem that …

Stability of power networks with time-varying inertia

A Kasis, S Timotheou… - 2021 60th IEEE …, 2021‏ - ieeexplore.ieee.org
A major transition in modern power systems is the replacement of conventional generation
units with renewable sources of energy. The latter results in lower rotational inertia which …

An evaluation of domestic electric water heaters for frequency control

S **ang, H Yang, B Cao - Frontiers in Energy Research, 2022‏ - frontiersin.org
Maintaining the frequency of a power system close to its nominal value (50 Hz or 60 Hz) is
critical, which comes mainly from generators and flexible loads in traditional power systems …

On the stability properties of power networks with time-varying inertia

A Kasis, S Timotheou, M Polycarpou - arxiv preprint arxiv:2301.09202, 2023‏ - arxiv.org
A major transition in modern power systems is the replacement of conventional generation
units with renewable sources of energy. The latter results in lower rotational inertia which …

Optimal secondary frequency regulation with on-off loads in power networks

A Kasis, S Timotheou… - IEEE Transactions on …, 2022‏ - ieeexplore.ieee.org
Load-side participation can provide support to the power network by appropriately adapting
the demand when required. In addition, it enables an economically improved power …

Frequency regulation with thermostatically controlled loads: Aggregation of dynamics and synchronization

A Kasis, I Lestas - IEEE Transactions on Automatic Control, 2021‏ - ieeexplore.ieee.org
Thermostatically controlled loads (TCLs) can provide ancillary services to the power network
by aiding existing frequency-control mechanisms. TCLs are, however, characterized by an …

A novel distributed secondary frequency control scheme for power networks with high order turbine governor dynamics

A Kasis, N Monshizadeh, I Lestas - 2018 European Control …, 2018‏ - ieeexplore.ieee.org
We consider the problem of distributed secondary frequency regulation such that stability
and an economically optimal allocation are attained. We study an arbitrarily connected …