Multiterminal DC Connection for Offshore Wind Farm
Authors
Dragan, Cristina Madalina ; Agap, Adelina
Term
4. term
Education
Publication year
2009
Pages
127
Abstract
Vedvarende energi fylder stadig mere i energimarkedet, og vindkraft har allerede vist sit potentiale. Store havvindparker på flere tusinde megawatt planlægges langt fra kysten. For at kunne overføre så store mængder energi effektivt og til en konkurrencedygtig pris kræves egnede transmissionsløsninger. Dette projekt undersøger en flerteminal jævnstrømsforbindelse (multiterminal DC) baseret på VSC-teknologi (spændingskildeomformere) mellem én havvindmøllepark og to forskellige elnet. Målet er at udvikle en ny styringsalgoritme, der regulerer, hvor meget effekt der udveksles mellem de tre systemer. Vi har opbygget detaljerede modeller af vindparkens komponenter, effektomformere, komponenter i DC-forbindelsen og alle regulatorer for at skabe en simuleringsplatform til fremtidige studier. De teoretiske analyser er efterprøvet med simuleringer i forskellige testsituationer for at vurdere, om det modellerede system er driftssikkert. Hele systemet er opbygget og simuleret i softwareværktøjet DIgSILENT PowerFactory.
Renewable energy is taking a growing share of the power market, and wind energy has already proven its potential. Offshore wind farms of several thousand megawatts are planned far from shore. To move such large amounts of power efficiently and at a competitive cost, suitable transmission systems are needed. This project investigates a multiterminal direct-current (DC) connection based on voltage-source converter (VSC) technology—power electronics that can precisely control voltage and power flow—linking one offshore wind farm to two separate grids. The aim is to develop an innovative control algorithm that manages the power exchange among the three systems. We built detailed models of the wind farm components, the power converters, the DC connection, and all controllers to create a simulation platform for future studies. The theoretical work was validated through simulations under different test scenarios to demonstrate the modeled system’s reliability. The entire system was implemented and simulated using the DIgSILENT PowerFactory software.
[This summary has been rewritten with the help of AI based on the project's original abstract]
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