MINIMUM-RESOURCE, MULTIPLE-MICROGRID BLACK START DRIVEN BY GRID FORMING INVERTERS

Abstract

Methods for performing a black start in a power system and corresponding systems. A method (200) includes starting (100) a first anchor grid-forming inverter (122) in a first microgrid (110) and starting (100) a second anchor grid-forming inverter (122) in a second microgrid (120). The first microgrid (110) is connected to a first bus (118) and the second microgrid (120) is connected to a second bus (128). The method includes measuring (202) a first voltage at the first bus (118) and measuring a second voltage at the second bus (128), determining (204) a voltage difference between the first bus (118) and the second bus (128), and determining (204) whether the voltage difference is within a voltage difference threshold (350). The method includes measuring (206) a first phase angle at the first bus (118) and measuring a second phase angle at the second bus (128), determining (208) a phase angle difference between the first bus (118) and the second bus (128), and determining (208) whether the phase angle difference is within a phase angle difference threshold (360). The method includes, when the voltage difference is within the voltage difference threshold (350) and the phase angle difference is within the phase angle difference threshold (360), then operatively connecting (212) the first bus (118) to the second bus (128).

CPC Classifications