DISTRIBUTED GENERATION CONTROL FOR MICROGRID DURING ISLANDING

摘要

System and methods are disclosed to handle power imbalance in one or more distributed generation (DG) units: detecting islanding at time t₁; selecting Phasor Measurement Unit (PMU) measurements during a pre-defined time window [t₁-τ, t₁]; checking the time window for an abrupt voltage change; if no sudden change of voltage is detected, determining an average value of s_PMU^t between t₁-τ and t₁ and using the average as a best estimate of a system power imbalance; if a sudden change of voltage is detected at time instant t₂, determining the average value of s_PMU^t between t₁-τ and t₂ and using the average as a best estimate of the system power imbalance; and adjusting a power reference of the DG units based on the best estimated system power imbalance.