Abstract
Decreasing costs of battery storage technologies
make them a viable option for providing flexibility in power
systems. In this paper, we study the operations of a battery
in combination with cascaded hydropower in a system with
uncertain net load due to wind power production. By simulating
the operations of the combined system for a whole year by solving
daily stochastic planning and real-time balancing problems, we
show that the battery is only used when the hydropower system
is under stress from large amounts of inflow and limited available
storage capacity. The annual cost savings of adding the battery,
including battery degradation costs, is 3,314 e, which is low
compared to the investment costs of the battery. Since the
inflow to the system follows a predictable seasonal pattern, the
system operator should consider renting the battery storage from
external sources, such as electric vehicles, instead of investing in
a permanent battery.
make them a viable option for providing flexibility in power
systems. In this paper, we study the operations of a battery
in combination with cascaded hydropower in a system with
uncertain net load due to wind power production. By simulating
the operations of the combined system for a whole year by solving
daily stochastic planning and real-time balancing problems, we
show that the battery is only used when the hydropower system
is under stress from large amounts of inflow and limited available
storage capacity. The annual cost savings of adding the battery,
including battery degradation costs, is 3,314 e, which is low
compared to the investment costs of the battery. Since the
inflow to the system follows a predictable seasonal pattern, the
system operator should consider renting the battery storage from
external sources, such as electric vehicles, instead of investing in
a permanent battery.