Abstract
The integration and grid-connection of large-scale distributed generations (DGs) in active distribution network (ADN) Based Urban Energy Internet brings new challenges and development opportunities to voltage control technologies. In this paper, a layered and staged voltage control frame based on the response rate of voltage control devices was proposed. The investigation focuses on the two-stage zonal-voltage control (TSZVC) scheme based on the coordination between the distributed static synchronous compensator (DSTATCOM) and distributed generator (DG) in the zonal-voltage control layer: in the primary control, only the DSTATCOM compensates the voltage with local infor-mation and the power flows of adjacent lines; in the secondary control, the DSTATCOM shifts part of the reactive power de-mands to DGs, which aims to retain the sustainable voltage com-pensation ability. Finally, simulations in Simulink software envi-ronment verifies that, the TSZVC improves the voltage quality of each point of common coupling (PCC) in the region, avoids the interaction among the voltage control devices.
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