IV SAVJETOVANJE BH KOMITETA

Selver Osmanković, M.Sc.E.E.
Energoinvest IEE
Bosnia and Herzegovina

Sažetak: In the article are presented results of influence Static Var Compenser (SVC) on the limitation for power transfer from B&H Electric Power System (EPS) to Croatian Electric Power System via 220 kV power transmission line (PTL) Prijedor – Međurić. Analysis has been done in the B&H EPS weak operation conditions, which now operate fully isolated from ex Yugoslavia EPS. Two other interconnection Power transmission lines transfer constant electric power as follows:

• 400 kV PTL Mostar – Konjsko 400/41 MW/MVAr,
• 220 kV PTL Gradačac – Đakovo 100/0 MW/MVAr.
  

Power Plants in the system are represented via:

• Synchronous machine model
• Excitation system model
• Prime mover model
  

Some of the generators stabilizing signal is applied to the exciter regulator input. These signal provide positive damping of power system and tie line oscillations.
In normal operation conditions, EPS configuration is determined with actual data load. The worst condition is studded; three phase fault near the bus of HPP Salakovac. Transient stability analysis of HPP Salakovac is carried out. The limitations power transfer through 220 kV PTL Prijedor – Međurić is calculated. Disconnection of the fault transmission lines is carried out with the ultra –speed circuitbreakers in time 0.1 sec. Reclosing time is 0.34 sec (17 cycles). Such disturbance simulation show that no power transfer through the PTL Prijedor – Međurić from EPS B&H to EPS Croatia is possible. Power transfer limit is increased to 125 MW through above mentioned PTL, if the SVC is used. The most suitable SVC location is determined by transient stability calculation. The minimum SVC reactive power value is 100 MVAr. The load flow couldn't to convergent for the smaller value SVC. Analysis of the results show that SVC contribute to increasing limitations of power transfer. Voltage and transient stability improvement is significantly.

Key words: Transient stability, power plants modeling, power transfer, analysis, SVC, exciter, stabilizer.
 

REKONEKCIJA 400 kV VODOVA I NAPONSKE PRILIKE NA PRENOSNOJ MREŽI

Mr. Nikola Rusanov, dipl.inž.el.
JP EP BiH
Sarajevo, Bosna i Hercegovina

Sažetak: Elektroenergetski sistem Bosne i Hercegovine će u narednih nekoliko godina biti u uslovima značajnih neizvjesnosti koje mogu imati veliki uticaj na tehno–ekonomske parametre funkcionisanja i planiranja. U ovom referatu navedene su očekivane posljedice rekonekcije prenosne mreže napona 400, 220 i 110 kV na pogonske parametre sistema sa aspekta bilansa snaga, posebno u režimima minimalnih opterećenja, ali i aktuelnog okruženje u kome će sistem Bosne i Hercegovine, i Javno preduzeće Elektroprivreda Bosne i Hercegovine (JP EP BiH) funkcionisati u nekoliko narednih godina.

Ključne riječi: Napon, rektivna snaga, prenosna mreža, gubici

Husnija Ferizović, dipl.inž.el.
JP Elektroprivreda BiH
Sarajevo, Bosna i Hercegovina

Sažetak: U radu se razmatra problematika modelovanja i primjene transformatora sa promjenom odnosa transformacije pod opterećenjem upravljanih ručno ili preko automatskih regulatora napona. Kao primjer, prezentirana je simulacija automatske regulacija napona na regulacionom transformatoru u TS 220/110 kV Bihać 1, za slučaj poremećaja (ispad potrošnje) u čvorištu 110 kV Prijedor 2. Primjer je urađen korištenjem programskog paketa PSS/E (Power Technologies, Inc).

Mirsad Fazlinović, Enver Šabanović, Izet Delalić
JP EP BiH
Bosna i Hercegovina

Sažetak: Rad razmatra problematiku eksploatacije termoelektrana Tuzla i Kakanj sa tehničkog i ekonomskog aspekta za različite režime opterećenja blokova (optimalno, minimalno na ugalj, minimalno uz dodavanje tečnog goriva, obustave u toku noći), a u funkciji različitih scenarija rada elektroenergetskog sistema EP BiH u 1999. godini.

Ključne riječi: Termoelektrane, režimi minimalnih opterećenja

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