| Popis: |
Renewable Distributed Energy Resources (DERs) are on track to dominate in near future, mitigating the ever-growing energy demand. DERs mostly interact with the grid through power electronic converters, whereas traditional power grid’s power operations are controlled by Synchronous Machines (SMs). With more DERs coming into the picture and contributing an increasing portion of power flow, the power control architecture of the grid must be revisited. There are many benefits of using a Voltage Controlled-Virtual Synchronous Machine (VC-VISMA) controller, such as communication-less cooperation between power sources achieving tight regulation of grid voltage and frequency. But a major disadvantage of this controller is it cannot operate under conditions where the central grid is absent, such as black-start. In this paper, a modified VC-VISMA or Dropped VISMA (DVSM) is proposed aiming to control voltage and frequency even under black start. The performance of this modified controller is validated in MATLAB/Simulink. |
