Regulasi Tegangan Arus Searah Turbin Angin dan Baterai untuk Microgrid
Abstract
In the future, renewable energy will become a source of electricity to replace fossil energy. Direct current (DC) microgrids can operate independently without being connected to the utility grid. A DC microgrid system configuration can consist of a wind turbine, permanent magnet synchronous generator (PMSG), rectifier, DC-DC boost converter, bi-directional DC-DC converter, battery, and MPPT. Systems with complex components have challenges in maintaining stable DC voltage when there are changes in load or changes in wind speed. The work carried out in this paper focuses on improving the performance of DC microgrids by adding voltage control to meet the load demand and maintain constant DC voltage stability. The tests in this paper were carried out with three test conditions. In the first condition, the wind turbine can supply the load and battery, in the second condition, the wind turbine and battery supply the load, while in the third condition, the load is completely supplied by the battery. The test results show the performance of the system which is designed to meet load demands and to charge the battery. Likewise, when the wind speed is low, the generating capacity of the wind turbine cannot meet the load demand, so the battery and wind turbine can increase the load. The designed system succeeded in maintaining the DC bus working voltage stable at the level of 400 V. There was instability in the DC bus voltage of approximately 1%, this value is still within the tolerance limit that can be accepted by the load.
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