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Estimation of Power Exchange through 110 kV Overhead Power Lines at the Interface of the Romanian and Moldovan Power Systems / Estimarea schimbului de putere prin linii electrice aeriene 110 kV la interfața sistemelor electroenergetice ale României și Republicii Moldova / Оценка обмена мощностью по ВЛ 110 кВ румынской и молдавской энергосистем

The purpose of this paper is to estimate the possibility of technical use of the 110 kV voltage lines (OPL) for the interconnection of the power systems of the Republic of Moldova and Romania, taking into account in the unified power system regime, which includes the power system of the CIS countrie...

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Bibliographic Details
Published in:Problems of the regional energetics 2018-01, Vol.2018 (2)
Main Authors: Istrate, M, Gavrilas, M, Grigoras Gh, Iu, Ermurachi, Suslov, V, Bosneaga, V, Bykova, E, Berzan, V, Postolaty, V
Format: Article
Language:eng ; rum ; rus
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Summary:The purpose of this paper is to estimate the possibility of technical use of the 110 kV voltage lines (OPL) for the interconnection of the power systems of the Republic of Moldova and Romania, taking into account in the unified power system regime, which includes the power system of the CIS countries, of Moldova, Romania, Ukraine and other countries in the region. In the calculation scheme of the permanent synchronous regime of the integrated system, the interconnection zone of the Moldovan and Romanian systems was highlighted for the lines of 110 kV: Stanca-Costeşti, Ţuţora (Fai) - Ungheni and Hushi-Cioara. Transformer phase difference angle adjustment devices have been introduced in the 110 kV OPL to provide the bidirectional power shift regime. In the existing topology of electricity networks, power flows at the power system interface are directed from the Republic of Moldova to Romania. Changing the direction of the power flows is possible through the 110 kV OPL A when equipped with phase shift devices. The results of the calculations of the permanent regime have demonstrated the possibility of achieving the reciprocal power exchange regime between the interconnected power systems by adjusting the phase difference angle. It was shown the possibility of stable operation when using 110 kV overhead power lines as interconnection lines of the Moldovan and Romanian power systems. The issue of interconnection through the 110 kV lines is complex and requires an individual approach to how to achieve it. Scopul acestei lucrări constă în estimarea posibilității utilizării tehnice a liniilor cu tensiunea de 110kV de la interfața sistemelor electroenergetice ale Republicii Moldova și României ca linii de interconexiune, ținând cont de regimul sistemului electroenergetic unificat, care include concomitent sistemul electroenergetic al țărilor CSI, inclusiv, a Moldovei, României, Ucrainei și a altor țări din regiune. În schema de calcul al regimului permanent sincron a sistemului integrat s-a evidențiat zona de interconexiune a sistemelor moldovenesc și românesc: linie electrică aeriană (LEA) 110 kV Stânca-Costești, Țuțora (Fai)-Ungheni și Huși-Cioara. În LEA 110 kV au fost introduse dispozitive de reglare a unghiului diferenței de fază tip transformator pentru a asigura regimul bidirecțional al schimbului de putere. În topologia existentă a rețelelor electrice fluxurile de putere la interfața sistemelor electroenergetice au direcția din Republica Moldova spre Români
ISSN:1857-0070
DOI:10.5281/zenodo.1343396