Match!
Matej Krpan
University of Zagreb
TurbineControl theoryWind powerFrequency responseElectric power system
31Publications
2H-index
14Citations
What is this?
Publications 33
Newest
#1Miljenko BrezovecH-Index: 2
#2Igor Kuzle (University of Zagreb)H-Index: 14
Last. Ninoslav Holjevac (University of Zagreb)H-Index: 5
view all 4 authors...
Abstract Generic dynamic models of hydraulic turbines are unable to capture power oscillations phenomena originating from a torque disturbance on a single runner blade. In this paper, an improved dynamic model of a double-regulated hydraulic turbine which takes into account torque oscillations identified from draft tube pressure measurements was presented. It was experimentally identified that specific power oscillations of a bulb turbine operating with low tailwater level can be connected to ca...
Source
#1Matej KrpanH-Index: 2
#2Igor KuzleH-Index: 14
#1Miljenko BrezovecH-Index: 2
#2Igor KuzleH-Index: 14
Last. Ninoslav HoljevacH-Index: 5
view all 4 authors...
The paper introduces, describes and analyses the specific power oscillations in hydroelectric power plant Dubrava that can appear in large bulb turbines operating with low tailwater levels. The procedure for the identification of the cause of oscillations is described and it is experimentally shown that the cause of power oscillations is a disturbance on a specific runner blade. The physical background of the cavitation-related phenomena that causes these oscillations is presented. Furthermore, ...
1 CitationsSource
#1Matej Krpan (University of Zagreb)H-Index: 2
#2Igor Kuzle (University of Zagreb)H-Index: 14
Abstract Power converter technology partially or fully electrically decouples the wind energy source from the grid which results in the decrease of system inertia. However, when those units participate in virtual inertial response their electromechanical dynamics become coupled to the grid electromechanical modes. To date, there were no comprehensive studies on how do different elements and parameters of a wind energy conversion system (WECS) impact its virtual inertial response provision. This ...
1 CitationsSource
#1Matej Krpan (University of Zagreb)H-Index: 2
#2Igor Kuzle (University of Zagreb)H-Index: 14
In this paper, an accurate and simple dynamic model of a supercapacitor bank system for power system dynamics studies is presented. It is shown through comprehensive simulations in MATLAB-Simulink that an ideal capacitor representation is not always adequate. The proposed model is derived from a detailed RC circuit representation. Furthermore, a complete control system of the supercapacitor bank is also presented. The proposed model is easy to integrate in any power system simulation software an...
#1Adnan SecicH-Index: 1
#2Matej Krpan (University of Zagreb)H-Index: 2
Last. Igor Kuzle (University of Zagreb)H-Index: 14
view all 3 authors...
It has been over two decades since the publication of pioneer works about the power transformer diagnostics based on monitoring of their acoustic fingerprints. Since then, there has been great progress in this field and the methods used are as complex as ever. Any unnecessary intervention on a power transformer implies its temporary disconnection from the power grid. The inability to supply electricity to the customer means not only financial loss for the utility but also generates a non-materia...
Source
#1Ivan PavićH-Index: 5
#2Matej KrpanH-Index: 2
Last. Yong-qian LiuH-Index: 1
view all 4 authors...
Source
#2Tomislav CapuderH-Index: 12
Last. Matija ZidarH-Index: 2
view all 14 authors...
#1Ninoslav HoljevacH-Index: 5
#2Matej KrpanH-Index: 2
Last. Matija ZidarH-Index: 2
view all 4 authors...
#1Matej Krpan (University of Zagreb)H-Index: 2
#2Igor Kuzle (University of Zagreb)H-Index: 14
Wind power generation has reached a significant share in power systems worldwide and will continue to increase. As the converter-connected generation reduces the grid inertia, more and more interest has been given to exploiting the kinetic energy and controllability of variable-speed wind turbine generators (VSWTGs) for frequency support. Consequently, the grid frequency dynamics are changing. Thus, it is necessary to include the frequency response of wind power plants in the system frequency re...
5 CitationsSource
1234