Superordinate Voltage Control in Smart Low-Voltage Grids –Laboratory and Field Test Results

Abstract

Voltage control in low voltage grids is usually done using decentralized voltage control devices as on-load-tap changers or line voltage regulators, Volt/VAR-characteristics of infeeders or batteries. The application of a centralized superordinate voltage control strategy in low-voltage grids can help to both keep grid voltage within the limits given by the standards and raise the number of installed PV-generation without additional grid extension. The proof-of-concept of the superordinate voltage controller realized in the grid integration laboratory at TUM and the implementation and potential of the controller in a real low-voltage grid will be presented in the following paper.