A New Zero-Sequence Voltage Compensation Algorithm for A Dstatcom Based on Consumer Unbalance

This paper presents a methodology to identify in "real-time" the parcels of responsibility of the utility and the consumer for the zero-sequence unbalance at the point of common coupling. The output signal of the proposed algorithm is used to generate the reference signals for the voltage control-loop of a four-wire three-phase distribution static synchronous compensator. Digital simulation results are used to validate the presented methodology. In addition to the proposed algorithm to identify the responsibility of the consumer unbalance, the capacity of the static compensator can be designed to only compensate for the zero-sequence voltage in the PCC caused by the consumer.