Abstract
In this paper, a power oscillation damping (POD)
controller embedded in virtual synchronous machines (VSMs)
is proposed. This controller suggests the decoupled use of both
active and reactive powers to damp low-frequency oscillations
present in a power network. This allows for selecting either
power component or both of them to damp the oscillations. This
issue is relevant since transmission system operators are imposing
new connection requirements to converter interfaced generators
(CIGs) requesting grid-forming capability and POD. In the
literature, it has been shown that these services can be provided
using the VSM control technique. However, POD controllers are
more complex in VSMs than in typical grid-following converters
due to the inherent coupling between active and reactive powers.
The performance of the proposed POD controller is evaluated
by using electromagnetic transient simulations on a benchmark
two-area power system with an additional CIG unit.
controller embedded in virtual synchronous machines (VSMs)
is proposed. This controller suggests the decoupled use of both
active and reactive powers to damp low-frequency oscillations
present in a power network. This allows for selecting either
power component or both of them to damp the oscillations. This
issue is relevant since transmission system operators are imposing
new connection requirements to converter interfaced generators
(CIGs) requesting grid-forming capability and POD. In the
literature, it has been shown that these services can be provided
using the VSM control technique. However, POD controllers are
more complex in VSMs than in typical grid-following converters
due to the inherent coupling between active and reactive powers.
The performance of the proposed POD controller is evaluated
by using electromagnetic transient simulations on a benchmark
two-area power system with an additional CIG unit.