dear researchers, having a cluster of islanded DC-Microgrids supplied by PV- Battery- Supercapacitor, besides supported by backup diesel generator, how to control the diesel generator when compensating power unbalace of microgrids? Is it uaing dual loop cascaded structre, or using single current loop control.
Noting that the battery and supercapacitor are controlled with dual loop structrue considering the Dc bus voltage deviations.
Thank you for your reply and feedbacks.
Dear Mohamed,
It is better to have single-loop control since you have the battery and super cap for complete voltage control. However, in any way, you need a customised control for diesel gen as well.
I am not sure how do you dispatch your diesel generator under different scenarios. For example, the diesel generator might need to run under a minimum load, which would provide better efficiency. And you cannot run the diesel generator under a certain level of load for diesel engine security reasons.
Thank you,
Doctor Md Ruhul Amin, thank you so much for your response. What I have to clarify is that the DG is already controlled (Engine control), besides I used a non-controlled rectifier, so my current interest is in the control of the DC-DC converter that links the DG with the DC bus bar of the system. Here, I scheduled several scenarios between PV-BESS-SC-DG resources considering a proposed loading profile. Then, I am confused about the control structure of DG when intervening alone or with other resources. This is the exact issue I am facing now.
Thank you if you can clarify more or suggest other solutions.
The following steps: 1, the system load status detection step: When the system load during normal operation of the island grid system changes, it is transferred to the next step; 2. Diesel generator starts stopping control processing step: If the diesel generator is working The energy storage has been added to the high state, and the diesel generator is processed. If the diesel generator is added to the energy storage, the diesel generator is stopped; if the diesel generator is started to stop control processing After the island grid system still cannot operate stably, then it is transferred to the next step; Machine, energy storage and other equipment for flexible examination, charge, extending the service life of the equipment.
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