Impact of model detail of synchronous machines on real-time transient stability assessment

T Weckesser, H Jóhannsson… - 2013 IREP Symposium …, 2013 - ieeexplore.ieee.org
In this paper, it is investigated how detailed the model of a synchronous machine needs to
be in order to assess transient stability using a Single Machine Equivalent (SIME). The …

When to island for blackout prevention

P Demetriou, J Quirós-Tortós… - IEEE Systems …, 2018 - ieeexplore.ieee.org
Cascading outages leading to large-area blackouts can be mitigated using intentional
controlled islanding (ICI). An ICI scheme must define the most suitable time to split the …

Wide-area assessment of aperiodic small signal rotor angle stability in real-time

H Jóhannsson, AH Nielsen… - IEEE Transactions on …, 2013 - ieeexplore.ieee.org
This paper presents the details of a new real-time stability assessment method. The method
assesses a particular mechanism of stability: each generator's capability to generate …

[HTML][HTML] Aperiodic small signal stability method for detection and mitigation of cascading failures in smart grids

F Hayat, M Adnan, S Iqbal, SEG Mohamed - Results in Engineering, 2024 - Elsevier
The occurrence of cascading failures poses significant risks to the stability and reliability of
modern smart grids. This article presents a novel hybrid algorithm designed to assess and …

Coordination of system needs and provision of services

H Hansen, LH Hansen, H Jóhannsson… - 2013 - IET
This paper addresses a challenge associated with large scale deployment of distributed
energy resources (DER) to provide system services in future sustainable power systems; …

Real-time thevenin impedance computation

S Sommer, H Jóhannsson - 2013 IEEE PES Innovative Smart …, 2013 - ieeexplore.ieee.org
Stable and secure operation of power systems becomes increasingly difficult when a large
share of the power production is based on distributed and non-controllable renewable …

Identification of critical transmission limits in injection impedance plane

H Jóhannsson, J Østergaard, AH Nielsen - International Journal of …, 2012 - Elsevier
In this paper, equations are derived that describe the map** of critical boundaries and
characteristic curves from the three dimensional PQV-surface into the two-dimensional …

Investigation of the adaptability of transient stability assessment methods to real-time operation

T Weckesser, H Jóhannsson, S Sommer… - 2012 3rd IEEE PES …, 2012 - ieeexplore.ieee.org
In this paper, an investigation of the adaptability of available transient stability assessment
methods to real-time operation and their real-time performance is carried out. Two …

Early prevention method for power system instability

E Dmitrova, ML Wittrock, H Jóhannsson… - IEEE Transactions on …, 2014 - ieeexplore.ieee.org
This paper presents a method to determine suitable countermeasures against emerging
aperiodic small disturbance rotor angle (ASD) instability. The method utilizes stability …

Assessment of the impact that individual voltage source has on a generator's stability

E Dmitrova, H Jóhannsson… - 2012 10th International …, 2012 - ieeexplore.ieee.org
This paper presents an approach for splitting equivalent Thevenin voltage into components
induced by each voltage source in the reduced grid. Thevenin equivalent representation of …