Power Quality Improvement Using Voltage Controlled Distributed Energy Resources (VC-DER)
نویسنده
چکیده
This paper presents voltage control scheme by using directly voltage-controlled distributedenergy resource units (VC-DERs) of an islanded microgrid to provide overcurrent,voltage sag and harmonics protection. The overcurrent protection scheme detects the fault, limits the output current magnitude of the DER unit, and restores the microgrid to its normal operatingconditions subsequent to fault clearance. The overload protectionscheme limits the output power of the VC-DER unit. VC-DER unit maintains voltage profile by injecting voltage in the system it controls voltage sag occurred due to uncertain conditions & it controlled harmonics further improves power quality of the system. Off-line digital time-domain simulation studies, in the MATLABsoftware environment, demonstrate the feasibility and desirableperformance. Real-time case studiesverifies performance of the hardware.
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