Grid Stability Studies of Electrolyzer-based Energy Storage Integration
Author
Pramana Fitrah, Adam
Term
4. term
Education
Publication year
2022
Abstract
Denmark is moving toward a fully renewable electricity and heating system, but the rising share of renewable energy introduces new stability challenges during disturbances. This thesis investigates how integrating an electrolyzer-based Power-to-X (PtX) energy storage system affects grid dynamics and whether it can provide supportive system services. A dynamic PtX model—including an electrolyzer, power electronics interface, and control—is developed in DIgSILENT PowerFactory and integrated into the IEEE 9-bus test system. Grid response is assessed through load flow, short-circuit calculations, and RMS time-domain simulations under symmetrical and asymmetrical faults and loss of a generation unit. The simulations indicate that the developed PtX model can improve frequency and voltage performance, contributing to system stability. The study is simulation-based and emphasizes the controller’s role in the dynamic behavior during disturbances.
Danmark er på vej mod et fuldt vedvarende el- og varmesystem, men den stigende andel af vedvarende energi giver nye stabilitetsudfordringer ved forstyrrelser. Dette speciale undersøger, hvordan integration af et elektrolysebaseret Power-to-X (PtX) energilager påvirker netdynamikken, og om det kan levere støttende systemtjenester. En dynamisk PtX-model – inklusive elektrolyseanlæg, effektelektronisk interface og styring – udvikles i DIgSILENT PowerFactory og integreres i IEEE 9-bus testnettet. Nettets respons vurderes ved lastflow, kortslutningsberegninger og RMS-tidsdomænesimulationer under symmetriske og asymmetriske fejl samt tab af en produktionsenhed. Simulationerne viser, at den udviklede PtX-model kan forbedre frekvens- og spændingsydelsen og dermed bidrage til systemstabilitet. Studiet er simuleringsbaseret og fremhæver styringens rolle i den dynamiske adfærd under forstyrrelser.
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Keywords