AFL

The Half Yearly Report of Belgrade PES Chapter

The Workshops

Together with CIGRE SRBIJA, the IEEE Power and Energy Society, Chapter for Serbia and Montenegro, during the national conference CIGRE the workshop entitled “TSO-DSO cooperation on Grid code amendment due to newest transmission system challenges” is held at June/6/2017. at 12:00 in hotel “Palisad”, hall C. The main initiator of workshop subject and coordinating person was the Serbian Chapter board member MSc Bojana Mihić (coming from industry, Serbian national grid operator). The workshop lecturers were:

Nebojša Petrović, dipl. ing, technical adviser of general manager, EMS (Serbian national grid operator). His lecture was entitled “ENTSOe influence on Serbian TSO regulations”

Petar Petrović, dipl. ing, chief dispatching person, EMS (Serbian national grid operator). His lecture was entitled “Operational characteristics of Serbian transmission network in different working states”

Mr Dušan Vukotić, dipl. ing,
ODS – EPS Distribution, Direction DEES,

Radovan Lekić, dipl. ing,
ODS – EPS Distribution, Direction DEES,
Department Kraljevo
“Integration of renewable power sources into the national transmission grid, applications and experience in Serbia”

On the top picture the workshop lecturers are shown together with Serbian IEEE PES Chapter board members. There were 44 attendees among them the 10 IEEE members. The discussion following was very fruitful and coordinated activities related to the workshop subject will be continued with other national professional organizations, as is CIRED Serbia.

Lectures Given by Renowned Academics, IEEE Members

2.1 Report about lecture given by  prof. dr Alexandar Stankovic, held on June/15/2017.

Very interesting lecture with highlighted developements directions regarding distributed power system control, entitled “Networked Estimation and Control in Cyber-Physical Energy Systems“ was given by prof. dr Alexandar Stankovic at Thursday June/15/2017 at hall 61 in the School of Electrical Engineering, University of Belgrade at 14:00.

Electric power systems under scope are among most spatially extended systems. Their stable operation in the presence of disturbances and outages is made possible by real-time control, both local and system-wide (over communication networks). Global optimization and control are key for achieving higher efficiencies in normal operation and for faster recovery from contingencies.

In the lecture a delay mitigation approach based on timestamping of transmitted signals is described, which can successfully mitigate the destabilizing effects of delay.

There were 24 attendees at lecture, among them the 7 IEEE members. The lecture was followed by fruitful discussion, regarding actuality and applicability of presented matter to modern power system control problems, using internet technologies and advanced distributed control approach. The lecture attendees come from the School of Electrical Engineering, University of Belgrade, EMS A.D. (Serbian national grid operator), Electrical Engineering Institute “Nikola Tesla” and Institute “Mihailo Pupin”.

2.2  Report about lecture given by prof. dr Slobodan N. Vukosavić, held on May/18/2017 .

Due to increased students and young professionals attention the lecture of prof. Dr Slobodan N. Vukosavić entitled „High Precision Active Suppression of DC Bias in AC Grids by Grid Connected Power Converters” is delivered again on May/18/2017 at School of Electrical Engineering, University of Belgrade in the Hall 56.

The lecture was this time directed to young professionals coming from industry and to students of the final year. At the beginning of the lecture presentation the IEEE PES Chapter Outstanding Engineer Award for 2016 is handed to ex-Chapter Chair of Serbian IEEE Chapter Power & Energy (PE-31), prof. dr Zoran Radojević.

After award delivery prof. dr Slobodan Vukosavić gave very interesting lecture aimed to relate the young attendees to modern problems in power engineering and applied power electronics.

The DC current injection in modern power system due to increased number of inverters connected to power network is enlightened in details. The problem under scope is related to other power electronics equipment using PWM modulation as well. The measuring methods and associated limitations are deeply elaborated and finally the new improved DC current suppression methods are proposed. Moreover, the proposed method application influence on the final product price is also covered.

In the following dissection related to proposed improvements the 8 attendees took part. The lecturer gave professional directions to young attendees based on his rich national and international academic and industrial experience. The professional importance of IEEE membership is strongly stressed.

There were 15 attendees at lecture, among them the 2 were members of IEEE S&M PES Chapter. The majority of attendees are final year students of the School of Electrical Engineering of University of Belgrade.

2.3  Report about lecture given by prof. dr Saša Ž. Djokić, held on 10.05.2017.

The lecture entitled „Load Modelling in “Smart Grids”:From Individual LV Loads to Aggregate MV Demands” was held May/10/2017. at Faculty of Electronic Engineering, University of Nis. The lecture was aimed to teaching staff and students of Faculty of Electronic Engineering at Niš.

The lecturer highlighted the importance of load modelling in modern distribution networks. The results of his research were presented through typical load model cases developed from practical experience.

Future electricity supply systems (so called “smart grids”) will see significant increase of renewable-based distributed generation, radical transformation of transmission and distribution networks and introduction of new flexible, intelligent and automated control, monitoring and communication infrastructures. This will be necessary to reduce CO2 emissions and other drivers of climate change, while simultaneously maintaining high levels of security, sustainability and affordability of electricity supply. It is, however, widely recognised by all stakeholders that supply-side solutions alone will not be sufficient for the realisation of these challenging tasks. Additional strong support and contributions are expected to come from demand-side actions and measures, i.e. from a modified behaviour and physical demand for electricity through the consumer choice and evolved end-use of new highly efficient and controllable types of loads.

This presentation presents the recent experimental (i.e. testing and measurement) and analytical (i.e. modelling) results on the characteristics of some new types of LV loads (EV chargers, modern Switch-Mode Power Supplies, CFLs and LED lamps, but also PV inverters), as well as on the disaggregation of the demands measured at MV network level into the corresponding customer classes and load types, including a novel load forecasting method.

There were 42 attendees at lecture, among them the 6 were members of IEEE S&M PES Chapter. The majority of attendees were students (25) and members of teaching staff of Faculty of Electronic Engineering and two attendees came from industry.

In the following discussion five attendees took part. The lecturer highlighted the importance of IEEE membership for professional development.

The members of Power engineering Department had special pleasure to attend the lecture given by their successful colleague. Part of the Department staff continued the meeting with prof. Djokic at dinner in restaurant.

2.4  Report about lecture given by Prof. Slobodan N. Vukosavić, held on April/13/2017.

Lecture entitled “High Precision Active Suppression of DC Bias in AC Grids by Grid Connected Power Converterswas held on April/13 at Electrical Engineering institute “Nikola Tesla” at Belgrade. The lecture was aimed to young professionals from industry.

In interesting exchange of ideas related to the lecture scope, the six attendees took part. The lecturer illustrated his rich practical experience about subject with applied solutions on one very illustrative way.

There were 18 attendees at lecture, among them the 4 were members of IEEE S&M PES Chapter. The attendees came from research institutes (Institute “Mihailo Pupin“, Elektrical Engineering Institute “Nikola Tesla“) and from industry (Siemens Serbia, Serbian national grid).

The professional and educational opportunities related to IEEE PES S&M are explained to young colleagues.

The Chapter board meetings, the first one held electronically between 11th and 12th of April 2017 and the second one held side by side with the workshop entitled “TSO-DSO cooperation on Grid code amendment due to newest transmission system challenges” on June 6, 2017.

The Chapter board members, from left to right prof. dr Predrag Stefanov, prof. dr Lidija Korunović, MSc Bojana Mihić, dr Jasna Dragosavac and dr Žarko Janda, at Chapter board meeting held on margin of workshop, entitled “TSO-DSO cooperation on Grid code amendment due to newest transmission system challenges” on June/6/2017, Zlatibor, Cigre Serbia.

Report about IEEE PES Chapter Outstanding Engineer Award 2016 delivery to prof. dr Zoran Radojević 

Before the lecture of prof. dr. Slobodan N. Vukosavić held on May/18/2017, in front of the attendees in Hall “Nikola Tesla” of the School of Electrical Engineering of the University of Belgrade, the Chapter Chair of IEEE Chapter Power & Energy (PE-31), Belgrade, Republic of Serbia, dr Žarko Janda, handed the IEEE PES Chapter Outstanding Engineer Award for 2016 year to ex-Chapter Chair, prof. dr Zoran Radojević. During that occasion dr Janda highlighted the credit of prof. dr Zoran Radojević for achieving the recognizable professional position of Chapter at Serbian national level.